Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 7: Guidance for the assessment of conformity

This Technical Specification gives guidance for the assessment of conformity of compounds, products, joints and assemblies in accordance with the applicable part(s) of EN 1555 intended to be included in the manufacturer’s quality plan as part of the quality management system and for the establishment of certification procedures.
It is recommended that the quality management system conforms to or is no less stringent than the relevant requirements to EN ISO 9001 [2].
NOTE 1   If certification is involved, the certification and inspection body is preferably compliant with EN 45011 [3], EN 45012 [4] or EN ISO/IEC 17020 [5], as applicable.
In conjunction with Parts 1 to 5 of EN 1555 (see Foreword), this Technical Specification is applicable to polyethylene (PE) plastics piping systems for the supply of gaseous fuels. It is applicable to PE pipes, fittings, and valves, their joints and to joints with components of other materials intended to be used under the following conditions:
a)   a maximum operating pressure, MOP, up to and including 10 bar );
b)   an operating temperature of 20 °C as reference temperature.
NOTE 2   For other operating temperatures, derating coefficients can be used; see EN 1555-5.
For mechanical fittings conforming to ISO 10838-1 [6], ISO 10838-2 [7] or ISO 10838-3 [8], as applicable, guidance for assessment of conformity is not given in this part of EN 1555. When requested, a quality plan based on the tests mentioned in ISO 10838-1 [6], ISO 10838-2 [7] or ISO 10838-3 [8], as applicable, should be set up in agreement between user and manufacturer.
EN 1555 covers a range of maximum operating pressures and gives requirements concerning colours and additives.
NOTE 3   It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.

Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Teil 7 : Empfehlungen für die Beurteilung der Konformität

Diese Technische Spezifikation enthält Leitlinien für die Bewertung der Konformität von Formmassen, Erzeugnissen, Verbindungen und Bauteilkombinationen in Übereinstimmung mit dem (den) zutreffenden Teil(en) von EN 1555, der (die) dazu vorgesehen ist (sind), als Bestandteil des Qualitätssicherungssystems und zur Einführung von Zertifizierungsverfahren in den Qualitätsplan des Herstellers einbezogen zu werden.
Als Empfehlung gilt, dass das Qualitätssicherungssystem entweder die einschlägigen Anforderungen von EN ISO 9001 [2] oder mindestens gleich strenge Anforderungen erfüllen sollte.
ANMERKUNG 1 Falls eine Zertifizierung durchgeführt wird, sollte(n) die Zertifizierungs- und Überwachungsstelle(n) vorzugsweise der zutreffenden Norm EN 45011 [3], EN 45012 [4] oder EN ISO/IEC 17020 [5] entsprechen.
Zusammen mit den Teilen 1 bis 5 der EN 1555 (siehe Vorwort) gilt diese Technische Spezifikation für Kunststoff-Rohrleitungssysteme aus Polyethylen (PE) für die Gasversorgung. Es gilt für Rohre, Formstücke und Armaturen aus PE, deren Verbindungen untereinander sowie für Verbindungen mit Rohrleitungsteilen aus anderen Werkstoffen, die für den Einsatz unter den folgenden Bedingungen vorgesehen sind:
a) der maximal zulässige Betriebsdruck, MOP, beträgt nicht mehr als 10 bar1);
b) es gilt eine Betriebstemperatur von 20 °C als Bezugstemperatur.
ANMERKUNG 2 Für andere Betriebstemperaturen können Minderungsfaktoren verwendet werden, siehe EN 1555-5.
Für Formstücke für mechanische Verbindungen, die der zutreffenden Norm ISO 10838-1 [6], ISO 10838-2 [7] oder ISO 10838-3 [8] entsprechen, sind in diesem Teil von EN 1555 keine Empfehlungen für die Konformitäts-bewertung enthalten. Wird eine solche Bewertung gefordert, sollte im Einvernehmen zwischen Anwender und Hersteller ein Qualitätssicherungsplan erstellt werden, der auf den in der zutreffenden Norm ISO 10838-1 [6], ISO 10838-2 [7] oder ISO 10838-3 [8] genannten Prüfungen basiert.
EN 1555 deckt einen Bereich maximal zulässiger Betriebsdrücke ab und legt Anforderungen an die Einfär-bung von Rohrleitungsteilen sowie die Verwendung von Zusatzstoffen fest.
ANMERKUNG 3 Der Käufer bzw. Auftraggeber ist unter Berücksichtigung der eigenen Anforderungen sowie der gelten-den nationalen Festlegungen und Verlegepraktiken oder -vorschriften für die entsprechende Auswahl dieser Kriterien verantwortlich.

Systèmes de canalisations en plastique pour la distribution de combustibles gazeux - Polyéthylène (PE) - Partie 7: Guide pour l'évaluation de la conformité

La présente Spécification technique fournit un guide pour l’évaluation de la conformité des compositions, produits, assemblages et montages conformes à la partie (aux parties) applicable(s) de l’EN 1555, destiné à être inclus dans le plan qualité du fabricant dans le cadre du système de management de la qualité et pour l’établissement de procédures de certification.
Il est recommandé que le système de management de la qualité soit conforme aux exigences pertinentes de l’EN ISO 9001 [2] ou au moins aussi strict que ces exigences.
NOTE 1   En cas de certification, il est recommandé que l’organisme de certification et de contrôle soit de préférence en conformité avec l’EN 45011 [3], l’EN 45012 [4] ou l’EN ISO/CEI 17020 [5], suivant le cas.
Conjointement avec les Parties 1 à 5 de l’EN 1555 (voir l’Avant-propos), la présente Spécification technique s’applique aux systèmes de canalisations en polyéthylène (PE) pour la distribution de combustibles gazeux. Elle s’applique aux tubes, raccords et robinets en PE, à leurs assemblages et à leurs assemblages avec des composants en d’autres matières, destinés à être utilisés dans les conditions suivantes :
a)   une pression maximale de service, MOP, jusqu’à et y compris 10 bar  ) ;
b)   une température de service de 20 °C comme température de référence.
NOTE 2   Pour d’autres températures de service, des facteurs de réduction peuvent être utilisés ; voir l’EN 1555 5.
Pour les raccords mécaniques conformes à l’ISO 10838 1 [6], l’ISO 10838 2 [7] ou l’ISO 10838 3 [8], suivant le cas, le guide pour l’évaluation de la conformité n’est pas donné dans cette partie de l’EN 1555. Si cela est nécessaire, il convient qu’un plan qualité basé sur les essais mentionnés dans l’ISO 10838 1 [6], l’ISO 10838 2 [7] ou l’ISO 10838 3 [8], suivant le cas, soit établi d’un commun accord entre l’utilisateur et le fabricant.
L’EN 1555 concerne une gamme de pressions maximales de service et donne les exigences concernant la couleur et les additifs.
NOTE 3   Il est de la responsabilité de l’acheteur ou du prescripteur de faire le choix approprié de ces différents aspects, en prenant en compte les exigences particulières et les réglementations nationales correspondantes ainsi que les pratiques ou codes de pose.

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen (PE) - 7. del: Smernice za ugotavljanje skladnosti

Ta tehnična specifikacija vsebuje navodila za ugotavljanje skladnosti materialov, izdelkov, spojev in sestavov z ustreznimi deli standarda EN 1555, ki naj bi se vključila v poslovnik kakovosti proizvajalca kot del sistema vodenja kakovosti, vsebuje pa tudi navodila za vzpostavitev postopka certificiranja. Priporoča se, da je sistem vodenja kakovosti skladen s standardom EN ISO 9001 [2] oziroma da ni manj strog od ustreznih zahtev iz tega standarda. OPOMBA 1: Pri certificiranju se priporoča, da je certifikacijski in inšpekcijski organ akreditiran v skladu s standardom EN 45011 [3], EN 45012 [4] ali EN ISO/IEC 17020 [5]. V povezavi z deli od 1 do 5 standarda EN 1555 (glej Predgovor) se ta tehnična specifikacija uporablja za polietilenske (PE) cevne sisteme iz polimernih materialov za oskrbo s plinastimi gorivi. Uporablja se za polietilenske cevi, fitinge in ventile ter njihove spoje in spoje s komponentami iz drugih materialov, namenjene uporabi v naslednjih pogojih:
a) najvišji obratovalni tlak (MOP) do vključno 10 barov1);
b) obratovalna temperatura 20 °C kot referenčna temperatura.
OPOMBA 2: Za druge obratovalne temperature je mogoče uporabiti redukcijske koeficiente; glej standard EN 1555-5. Ta del standarda EN 1555 ne podaja navodil za ugotavljanje skladnosti za mehanične fitinge, ki ustrezajo standardu ISO 10838-1 [6], ISO 10838-2 [7] ali ISO 10838-3 [8]. Uporabnik in proizvajalec na zahtevo sporazumno uvedeta poslovnik kakovosti na podlagi preskusov iz standarda ISO 10838-1 [6], ISO 10838-2 [7] ali ISO 10838-3 [8]. Standard EN 1555 zajema razpon najvišjih obratovalnih tlakov in določa zahteve glede barv in aditivov.
OPOMBA 3: Za ustrezno izbiro teh vidikov je odgovoren kupec ali projektant, pri čemer mora upoštevati posebne zahteve ter vse pomembne nacionalne predpise in prakse ali kodekse vgradnje.

General Information

Status
Withdrawn
Publication Date
29-Jan-2013
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
22-Dec-2021

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Standards Content (sample)

SLOVENSKI STANDARD
SIST-TS CEN/TS 1555-7:2013
01-april-2013
1DGRPHãþD
SIST-TS CEN/TS 1555-7:2003

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen

(PE) - 7. del: Smernice za ugotavljanje skladnosti

Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 7:

Guidance for the assessment of conformity

Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Partie 7 :

Empfehlungen für die Beurteilung der Konformität

Systèmes de canalisations en plastique pour la distribution de combustibles gazeux -

Polyéthylène (PE) - Teil 7: Guide pour l'évaluation de la conformité
Ta slovenski standard je istoveten z: CEN/TS 1555-7:2013
ICS:
83.140.30 Cevi, fitingi in ventili iz Plastics pipes, fittings and
polimernih materialov valves
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
SIST-TS CEN/TS 1555-7:2013 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CEN/TS 1555-7:2013
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SIST-TS CEN/TS 1555-7:2013
TECHNICAL SPECIFICATION
CEN/TS 1555-7
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
January 2013
ICS 23.040.01; 91.140.40 Supersedes CEN/TS 1555-7:2003
English Version
Plastics piping systems for the supply of gaseous fuels -
Polyethylene (PE) - Part 7: Guidance for the assessment of
conformity

Systèmes de canalisations en plastique pour la distribution Kunststoff-Rohrleitungssysteme für die Gasversorgung -

de combustibles gazeux - Polyéthylène (PE) - Partie 7: Polyethylen (PE) - Teil 7 : Empfehlungen für die

Guide pour l'évaluation de la conformité Beurteilung der Konformität

This Technical Specification (CEN/TS) was approved by CEN on 11 September 2012 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their

comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available

promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)

until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 1555-7:2013: E

worldwide for CEN national Members.
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Contents Page

Foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................. 4

1 Scope ................................................................................................................................................ 6

2 Normative references ....................................................................................................................... 6

3 Terms and definitions ...................................................................................................................... 7

4 Abbreviated terms .......................................................................................................................... 10

5 General ........................................................................................................................................... 10

6 Testing and inspection .................................................................................................................. 10

6.1 Grouping ......................................................................................................................................... 10

6.1.1 General ........................................................................................................................................... 10

6.1.2 Size groups..................................................................................................................................... 11

6.1.3 Fitting groups ................................................................................................................................. 11

6.1.4 Fitting types .................................................................................................................................... 11

6.2 Type testing .................................................................................................................................... 11

6.3 Batch release tests ......................................................................................................................... 19

6.4 Process verification tests .............................................................................................................. 22

6.5 Audit tests ...................................................................................................................................... 25

6.6 Indirect tests ................................................................................................................................... 28

6.7 One-off products and products produced in very low quantity ................................................... 28

6.8 Large diameter products................................................................................................................ 28

6.9 Documentation ............................................................................................................................... 29

6.9.1 Type test results ............................................................................................................................. 29

6.9.2 Test records ................................................................................................................................... 29

6.9.3 Technical file for certification purposes ....................................................................................... 29

Annex A (normative) Change of compound .............................................................................................. 30

A.1 General ........................................................................................................................................... 30

A.2 Change ........................................................................................................................................... 30

A.2.1 Change of base polymer ................................................................................................................ 30

A.2.2 Change of grade ............................................................................................................................. 30

A.2.3 Change of pigment ......................................................................................................................... 30

A.2.4 Change of additives other than pigments ..................................................................................... 30

A.3 Type testing required for re-evaluation ......................................................................................... 30

A.3.1 Changes A.2.1 and A.2.3.1 ............................................................................................................. 30

A.3.2 Changes A.2.2.1, A.2.2.2, A.2.2.3, A.2.3.2, A.2.4.1, A.2.4.2 and A.2.4.3 ........................................ 31

Annex B (informative) Basic test matrix for PE compounds and piping products................................... 32

Bibliography................................................................................................................................................ 34

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Foreword

This document (CEN/TS 1555-7:2013) has been prepared by Technical Committee CEN/TC 155 “Plastics

piping systems and ducting systems”, the secretariat of which is held by NEN.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes CEN/TS 1555-7:2003.
EN 1555 is composed of the following parts:

 EN 1555-1, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 1:

General;

 EN 1555-2, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 2: Pipes;

 EN 1555-3, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 3:

Fittings;

 EN 1555-4, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 4:

Valves;

 EN 1555-5, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 5:

Fitness for purpose of the system;

 CEN/TS 1555-7, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 7:

Guidance for the assessment of conformity (the present Technical Specification).

This issue of CEN/TS 1555-7 takes into account the technical changes made in the revision of EN 1555-1, -2,

-3, -5 and -4, published in 2010 and respectively in 2011. Guidance for the assessment of conformity given in

this document has been revised to reflect the changes made to test methods and requirements given in EN

1555-1, -2, -3, -4 and -5. Two new types of pipe have been introduced, i.e. coextruded pipes and peelalable

layer pipes. The sampling procedures and sampling frequencies for these types of pipes have been

introduced into the tables for TT, BRT, PVT and AT tests for pipes.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus,

Czech Republic, Denmark, Estonia, Finland, Former Yugoslav of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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CEN/TS 1555-7:2013 (E)
Introduction

Figures 1 and 2 are intended to provide general information on the concept of testing and organisation of

those tests used for the purpose of the assessment of conformity. For each type of test, i.e. type testing (TT),

batch release test (BRT), process verification test (PVT), and audit test (AT), this part of EN 1555 details the

applicable characteristics to be assessed as well as the frequency and sampling of testing.

A typical scheme for the assessment of conformity of compounds, pipes, fittings, valves, joints or assemblies

by manufacturers is given in Figure 1.
Figure 1 — Typical scheme for the assessment of conformity by a manufacturer

A typical scheme for the assessment of conformity of compounds, pipes, fittings, valves, joints or assemblies

by manufacturers, including certification, is given in Figure 2.
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CEN/TS 1555-7:2013 (E)

Figure 2 — Typical scheme for the assessment of conformity by a manufacturer, including

certification
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CEN/TS 1555-7:2013 (E)
1 Scope

This Technical Specification gives guidance for the assessment of conformity of compounds, products, joints

and assemblies in accordance with the applicable part(s) of EN 1555 intended to be included in the

manufacturer’s quality plan as part of the quality management system and for the establishment of certification

procedures.

It is recommended that the quality management system conforms to or is no less stringent than the relevant

requirements to EN ISO 9001 [2].

NOTE 1 If certification is involved, the certification and inspection body is preferably compliant with EN 45011 [3],

EN 45012 [4] or EN ISO/IEC 17020 [5], as applicable.

In conjunction with Parts 1 to 5 of EN 1555 (see Foreword), this Technical Specification is applicable to

polyethylene (PE) plastics piping systems for the supply of gaseous fuels. It is applicable to PE pipes, fittings,

and valves, their joints and to joints with components of other materials intended to be used under the

following conditions:
a) a maximum operating pressure, MOP, up to and including 10 bar ;
b) an operating temperature of 20 °C as reference temperature.

NOTE 2 For other operating temperatures, derating coefficients can be used; see EN 1555-5.

For mechanical fittings conforming to ISO 10838-1 [6], ISO 10838-2 [7] or ISO 10838-3 [8], as applicable,

guidance for assessment of conformity is not given in this part of EN 1555. When requested, a quality plan

based on the tests mentioned in ISO 10838-1 [6], ISO 10838-2 [7] or ISO 10838-3 [8], as applicable, should

be set up in agreement between user and manufacturer.

EN 1555 covers a range of maximum operating pressures and gives requirements concerning colours and

additives.

NOTE 3 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects,

taking into account their particular requirements and any relevant national regulations and installation practices or codes.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

EN 1555-1:2010, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 1:

General

EN 1555-2:2010, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 2:

Pipes

EN 1555-3:2010, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 3:

Fittings

EN 1555-4:2011, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 4:

Valves

EN 1555-5:2010, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 5:

Fitness for purpose of the system
1) 1 bar = 0,1 MPa.
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EN ISO 6259-1, Thermoplastics pipes ― Determination of tensile properties ― Part 1: General test method

(ISO 6259-1)

EN ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications  Classification,

designation and design coefficient (ISO 12162)

EN ISO 13477, Thermoplastics pipes for the conveyance of fluids  Determination of resistance to rapid

crack propagation (RCP)  Small-scale steady-state test (S4 test) (ISO 13477)
3 Terms and definitions

For the purposes of this document, the following terms and definitions given in EN 1555-1:2010,

EN 1555-2:2010, EN 1555-3:2010, EN 1555-4:2011 and EN 1555-5:2010 and the following apply.

3.1
certification body

impartial body, governmental or non-governmental, possessing the necessary competence and responsibility

to carry out certification of conformity according to given rules of procedure and management

Note 1 to entry: A certification body is preferably compliant with EN 45011 [3].
3.2
inspection body
body that performs inspection
Note 1 to entry: A body can be an organisation or part of an organisation.
Note 2 to entry: An inspection body is accredited to EN ISO/IEC 17020 [5].
3.3
testing laboratory

laboratory which measures, tests, calibrates or otherwise determines the characteristics of the performance of

materials and products

Note 1 to entry: In the context of this part of EN 1555, the materials and products can be subjected to type testing,

batch release testing, process verification testing, audit testing, and witness testing, as applicable.

Note 2 to entry: A testing laboratory is preferably compliant with EN ISO/IEC 17025[9].

3.4
quality management system
management system to direct and control an organisation with regard to quality

Note 1 to entry: Requirements for quality management systems are given in EN ISO 9001 [2].

3.5
quality plan

document setting out the specific quality practices, resources and sequence of activities relevant to a

particular product or range of products
3.6
type testing

testing performed to prove that the material, product, joint or assembly is capable of conforming to the

requirements given in the relevant standard

Note 1 to entry: The type test results remain valid until there is a change in the material or product or assembly

provided that the process verification tests are done regularly.
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3.7
batch release test
BRT

test performed by or on behalf of the manufacturer on a batch of compound or products, which needs to be

satisfactorily completed before the batch can be released
3.8
process verification test
PVT

test performed by or on behalf of the manufacturer on compound or products or joints or assemblies at

specific intervals to confirm that type tests originally performed on the compound or products or joints or

assemblies continue to be valid and the process continues to be capable of producing products which conform

to the requirements given in the relevant standard

Note 1 to entry: Such tests are carried out as a measure of process control and are not related to release of batches

of compound or products.
3.9
audit test

test performed by a test laboratory on behalf of an inspection body or certification body to confirm that the

compound, product, joint or assembly continues to conform to the requirements given in the relevant standard

and to provide information to assess the effectiveness of the quality management system

3.10
indirect test

test performed by or on behalf of the manufacturer, different from that specified test for that particular

characteristic, having previously verified its correlation with the specified test

3.11
witness test

test accepted by an inspection or a certification body for type testing and/or audit testing, which is carried out

by or on behalf of the manufacturer and supervised by a representative of the inspection or certification body,

qualified in testing
3.12
material

composition grouped by families, expressed by generic names, e.g. polypropylene, stainless steel, brass or

EPDM

Note 1 to entry: Definition from European Commission, Directorate-General for Enterprise and Industry, Sub-group on

Product Testing Procedures (EC, DG ENT and IND, SG PTP).
3.13
compound

clearly defined homogenous mixture of base polymer with additives, i.e. antioxidants, pigments, stabilisers

and others, at a dosage level necessary for the processing and the intended use of the final product

3.14
material batch

clearly identified quantity of a given homogeneous compound manufactured continuously under uniform

conditions and defined and identified by the compound manufacturer
3.15
product

pipe, fitting, or valve of a clearly identified type intended to be a part of a piping system which the

manufacturer puts on the market
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3.16
product batch

clearly identified collection of products, manufactured consecutively or continuously under the same

conditions, using the same compound conforming to the same specification

Note 1 to entry: The product batch is defined and identified by the product manufacturer.

3.17
lot
clearly identifiable sub-division of a batch for inspection purposes
3.18
sample

one or more products drawn from the same production batch or lot, selected at random without regard to their

quality
Note 1 to entry: The number of products in the sample is the sample size.

Note 2 to entry: The number of test pieces required for each test are taken from the sample. This information is given

in this document, in the product standard, or in the relevant test method standard.

3.19
group

collection of similar products from which samples are selected for testing purposes

3.20
component

product manufactured out of a specific composition or compound, brought to the market as part of another

product or as a spare part

Note 1 to entry: Components are considered as products and are individually approved (e.g. o-rings and gaskets), or

they are tested as integral part of a finished product (e.g. in a valve).
3.21
joint
connection between two or more products
3.22
assembled product
assembled final product using two or more single parts
3.23
assembly
unit of two or more products assembled for testing purposes
3.24
sampling plan

specification of the type of sampling to be used combined with the operational specification of the entities or

increments to be taken, the samples to be constituted and the measurements to be made

EXAMPLE A specific plan which indicates the type of test, the number of units of products or assemblies to be

inspected.
3.25
product type
generic description of a product
EXAMPLE A pipe or fitting or valve or their main parts, of the same design.
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3.26
body type
generic description of a body

EXAMPLE A valve body of a particular design, which can have different end connections.

3.27
cavity
space within a mould to be filled to form the moulded product

EXAMPLE That part of an injection mould which gives the form to the injection-moulded product.

4 Abbreviated terms

To avoid misunderstanding, the abbreviations in this Clause are defined as being the same in each language.

For the same reason, the terms are given in the three languages, English, French and German.

AT en : audit test
fr : essai d’audit
de : Überwachungsprüfung
BRT en : batch release test
fr : essai de libération de campagne de fabrication
de : Freigabeprüfung einer Charge
IT en : indirect test
fr : essai indirect
de : indirekte Prüfung
PVT en : process verification test
fr : essai de vérification du procédé de fabrication
de : Prozessüberprüfung
TT en : type test
fr : essai de type
de : Typprüfung
WT en : witness test
fr : essai témoin
de : Prüfung unter Aufsicht
5 General

5.1 Compounds, products, joints and assemblies shall conform to the requirements given in EN 1555-1,

EN 1555-2, EN 1555-3, EN 1555-4, and EN 1555-5.

5.2 Products and assemblies shall be produced by the manufacturer under a quality management system

which includes a quality plan.
6 Testing and inspection
6.1 Grouping
6.1.1 General

For the purposes of this Technical Specification, the groups specified in 6.1.2 and 6.1.3 apply.

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6.1.2 Size groups

Three size groups are defined for pipes and fittings, as given in Table 1. For testing purposes, one individual

nominal diameter, d , shall be selected from each group.
Table 1 — Size groups
Size group Nominal diameter, d
d < 75
75 ≤ d < 250
250 ≤ d ≤ 630
6.1.3 Fitting groups

Three groups of fittings each having a similar design are defined, as given in Table 2.

For testing purposes, one individual fitting shall be selected from each group.
Table 2 — Fitting groups
Fitting groups Fitting type
(A) Electrofusion socket fitting
(B) Electrofusion saddle fitting
(C) Spigot end fitting
6.1.4 Fitting types
Fitting groups are divided in fitting types.

Fitting group (A) includes the following fitting types: Electrofusion couplers, electrofusion 45° elbows,

electrofusion 90° elbows, electrofusion tees, electrofusion reducers, electrofusion end caps, etc.

Fitting group (B) includes the following fitting types: Electrofusion tapping saddles, electrofusion branch

saddles, etc.

Fitting group (C) includes the following fitting types: 45° elbows, 90° elbows, tees, reducers, end caps, etc.

6.2 Type testing

Relevant TTs shall be carried out whenever there is a change in design, in compound or production method,

other than routine in-process adjustments, and/or whenever there is an extension of the product range or

change of production site.

Relevant tests selected from the type testing tables for the product concerned to be carried out when a

change of the production site occurs should be defined by the manufacturer. If certification is involved the

scheme should be agreed between the parties concerned.

Type tests shall demonstrate that the products conform to all requirements for the characteristics given in

Tables 3 to 6, as applicable.

In case of change in compound as defined in A.2, relevant type testing requirements as defined in A.3, and in

Tables 3 to 6 as applicable, shall apply.
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For the purposes of a change in design, the following characteristics are relevant:

a) dimensions and geometry (see column D1 of Tables 5 and 6), as: change of visual and functional

optimisations, change of overall dimensions, change of a non-PE part;

b) joint affected part (see column D2 of Tables 5 and 6), as: change of the dimensions of the fusion zone

(e.g. wire pitch, wire depth), the electrical characteristics (e.g. wire, resistance), the fusion parameters

(e.g. time, voltage).

For the extension of the production range, the relevant characteristics given in Table 5 and Table 6, column E,

as applicable, shall be retested. If third party certification is involved, retesting shall be agreed between the

certification body and the manufacturer.

Table 3 — Characteristics of compounds that require type testing (TT) by the compound manufacturer

Reference to part,
clause or
Characteristic Sampling procedure
subclause of
EN 1555
Compound density -1:2010-4.2.3.1 3 samples/ compound
Oxidation induction time -1:2010-4.2.3.1 3 samples/ compound
(thermal stability)
Melt mass-flow rate (MFR) -1:2010-4.2.3.1 3 samples/ compound
Volatile content -1:2010-4.2.3.1 1 sample/ compound
Water content -1:2010-4.2.3.1 1 sample/ compound
Carbon black content -1:2010-4.2.3.1 3 samples/ compound
Carbon black dispersion -1:2010-4.2.3.1 1 sample/ compound
Pigment dispersion -1:2010-4.2.3.1 1 sample/ compound
Resistance to gas condensate -1:2010-4.2.3.2 1 sample/ compound
Resistance to weathering -1:2010-4.2.3.2 Once/compound
Resistance to rapid crack -1:2010-4.2.3.2 Number of test pieces shall conform to
propagation (critical pressure, EN ISO 13477, Once/compound
p ) (e ≥ 15 mm)
-5:2010-5 Number of pieces shall conform to
EN ISO 13477, Once/compound
Resistance to slow crack -1:2010-4.2.3.2 3 test pieces/ compound
growth (d : 110 mm SDR 11)
Determination of the failure -1:2010-4.3.1 3 samples/ compound
mode in a tensile test on a
-1:2010-4.3.2 3 samples/ compound
buttfusion weld (d : 110 mm
SDR 11)
Classification -1:2010-4.4 Shall conform to EN ISO 12162,
Once/compound

Only applicable if the requirement for volatile content is not conformed to. In case of dispute the

requirement for water content shall apply.
Only applicable for black compound.
Only applicable for non black compound.

Three pieces for elongation at break/ Three pieces for hydrostatic strength / One sample for decohesion of

an electrofusion joint.

Resistance to RCP and slow crack growth shall be measured on pipe made from the same compound

batch.
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Table 4 — Characteristics of pipes, including coextruded pipes and peelable layer pipes that require

type testing (TT) (1 of 2)
Reference Conditions
Sampling procedure
to part,
requiring test
Characteristic clause or
subclause
b b c
N D M E
Manufacturer Certification body
of EN 1555
1 test piece of each 1 test piece of one
Appearance -2:2010-5.1
+ + + +
diameter diameter/ size group
1 test piece of each 1 test piece of one
Colour -2:2010-5.2
+ + + +
diameter diameter/ size group
Geometrical characteristics -2:2010-6
+ - + + 1 test piece of each 1 test piece of one
diameter diameter/ size group
Circumferential reversion -2:2010-6.4
+ - + + 1 test piece of each 1 test piece of one
diameter/ size group 3 diameter/ size group 3
Hydrostatic strength -2:2010-7.2
3 test pieces of one 3 test pieces of one
+ - + +
(20 °C, 100 h) diameter/size group
...

SLOVENSKI STANDARD
kSIST-TS FprCEN/TS 1555-7:2012
01-julij-2012

Cevni sistemi iz polimernih materialov za oskrbo s plinastimi gorivi - Polietilen

(PE) - 7. del: Smernice za ugotavljanje skladnosti

Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 7:

Guidance for the assessment of conformity

Kunststoff-Rohrleitungssysteme für die Gasversorgung - Polyethylen (PE) - Partie 7 :

Empfehlungen für die Beurteilung der Konformität

Systèmes de canalisations en plastique pour la distribution de combustibles gazeux -

Polyéthylène (PE) - Teil 7: Guide pour l'évaluation de la conformité
Ta slovenski standard je istoveten z: FprCEN/TS 1555-7
ICS:
83.140.30 Cevi, fitingi in ventili iz Plastics pipes, fittings and
polimernih materialov valves
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
kSIST-TS FprCEN/TS 1555-7:2012 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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kSIST-TS FprCEN/TS 1555-7:2012
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kSIST-TS FprCEN/TS 1555-7:2012
TECHNICAL SPECIFICATION
FINAL DRAFT
FprCEN/TS 1555-7
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
May 2012
ICS 23.040.01; 91.140.40 Will supersede CEN/TS 1555-7:2003
English Version
Plastics piping systems for the supply of gaseous fuels -
Polyethylene (PE) - Part 7: Guidance for the assessment of
conformity

Systèmes de canalisations en plastique pour la distribution Kunststoff-Rohrleitungssysteme für die Gasversorgung -

de combustibles gazeux - Polyéthylène (PE) - Teil 7: Guide Polyethylen (PE) - Partie 7 : Empfehlungen für die

pour l'évaluation de la conformité Beurteilung der Konformität

This draft Technical Specification is submitted to CEN members for formal vote. It has been drawn up by the Technical Committee CEN/TC

155.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,

Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to

provide supporting documentation.

Warning : This document is not a Technical Specification. It is distributed for review and comments. It is subject to change without notice

and shall not be referred to as a Technical Specification.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TS 1555-7:2012: E

worldwide for CEN national Members.
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Contents Page

Foreword ..............................................................................................................................................................3

Introduction .........................................................................................................................................................4

1 Scope ......................................................................................................................................................5

2 Normative references ............................................................................................................................5

3 Terms and definitions ...........................................................................................................................6

4 Abbreviated terms .................................................................................................................................9

5 General ....................................................................................................................................................9

6 Testing and inspection ..........................................................................................................................9

6.1 Grouping .................................................................................................................................................9

6.1.1 General ....................................................................................................................................................9

6.1.2 Size groups .............................................................................................................................................9

6.1.3 Fitting groups ...................................................................................................................................... 10

6.1.4 Fitting types ......................................................................................................................................... 10

6.2 Type testing ......................................................................................................................................... 10

6.3 Batch release tests ............................................................................................................................. 18

6.4 Process verification tests .................................................................................................................. 21

6.5 Audit tests ........................................................................................................................................... 24

6.6 Indirect tests ........................................................................................................................................ 27

6.7 One-off products and products produced in very low quantity .................................................... 27

6.8 Documentation .................................................................................................................................... 28

6.8.1 Type test results ................................................................................................................................. 28

6.8.2 Test records ........................................................................................................................................ 28

6.8.3 Technical file for certification purposes .......................................................................................... 28

Annex A (normative) Change of compound .................................................................................................. 29

A.1 General ................................................................................................................................................. 29

A.2 Change ................................................................................................................................................. 29

A.2.1 Change of base polymer .................................................................................................................... 29

A.2.2 Change of grade.................................................................................................................................. 29

A.2.3 Change of pigment ............................................................................................................................. 29

A.2.4 Change of additives other than pigments ........................................................................................ 29

A.3 Type testing required for re-evaluation ............................................................................................ 29

A.3.1 Changes A.2.1 and A.2.3.1 ................................................................................................................. 29

A.3.2 Changes A.2.2.1, A.2.2.2, A.2.2.3, A.2.3.2, A.2.4.1, A.2.4.2 and A.2.4.3.......................................... 30

Annex B (informative) Basic test matrix for PE gas compounds and piping components ...................... 31

Bibliography ..................................................................................................................................................... 33

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Foreword

This document (FprCEN/TS 1555-7:2012) has been prepared by Technical Committee CEN/TC 155 “Plastics

piping systems and ducting systems”, the secretariat of which is held by NEN.
This document is currently submitted to the Formal Vote.
This document will supersede CEN/TS 1555-7:2003.
EN 1555 is composed of the following parts:

 EN 1555-1, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 1:

General;

 EN 1555-2, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 2: Pipes;

 EN 1555-3, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 3:

Fittings;

 EN 1555-4, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 4:

Valves;

 EN 1555-5, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 5:

Fitness for purpose of the system;

 FprCEN/TS 1555-7, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) —

Part 7: Guidance for the assessment of conformity (the present Technical Specification).

This issue of CEN/TS 1555-7 takes into account the technical changes made in the revision of EN 1555-1, -2,

-3, -4 and -5, published in 2010. Guidance for the assessment of conformity given in this document has been

revised to reflect the changes made to test methods and requirements given in EN 1555-1, -2, -3, -4 and -5.

Two new types of pipe have been introduced, i.e. coextruded pipes and peelalable layer pipes. The sampling

procedures and sampling frequencies for these types of pipes have been introduced into the tables for TT,

BRT, PVT and AT tests for pipes.
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Introduction

Figures 1 and 2 are intended to provide general information on the concept of testing and organisation of

those tests used for the purpose of the assessment of conformity. For each type of test, i.e. type testing (TT),

batch release test (BRT), process verification test (PVT), and audit test (AT), this part of EN 1555 details the

applicable characteristics to be assessed as well as the frequency and sampling of testing.

A typical scheme for the assessment of conformity of compounds, pipes, fittings, valves, joints or assemblies

by manufacturers is given in Figure 1.
Figure 1 — Typical scheme for the assessment of conformity by a manufacturer

A typical scheme for the assessment of conformity of compounds, pipes, fittings, valves, joints or assemblies

by manufacturers, including certification, is given in Figure 2.

Figure 2 — Typical scheme for the assessment of conformity by a manufacturer, including

certification
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FprCEN/TS 1555-7:2012 (E)
1 Scope

This Technical Specification gives guidance for the assessment of conformity of compounds, products, joints

and assemblies in accordance with the applicable part(s) of EN 1555 intended to be included in the

manufacturer’s quality plan as part of the quality management system and for the establishment of certification

procedures.

It is recommended that the quality management system conforms to or is no less stringent than the relevant

requirements to EN ISO 9001 [2].

NOTE 1 If certification is involved, the certification and inspection body is preferably compliant with EN 45011 [3],

EN 45012 [4] or EN ISO/IEC 17020 [5], as applicable.

In conjunction with Parts 1 to 5 of EN 1555 (see Foreword), this Technical Specification is applicable to

polyethylene (PE) plastics piping systems for the supply of gaseous fuels. It is applicable to PE pipes, fittings,

and valves, their joints and to joints with components of other materials intended to be used under the

following conditions:
a) a maximum operating pressure, MOP, up to and including 10 bar ;
b) an operating temperature of 20 °C as reference temperature.

NOTE 2 For other operating temperatures, derating coefficients can be used; see EN 1555-5.

For mechanical fittings conforming to ISO 10838-1 [6], ISO 10838-2 [7] or ISO 10838-3 [8], as applicable,

guidance for assessment of conformity is not given in this part of EN 1555. When requested, a quality plan

based on the tests mentioned in ISO 10838-1 [6], ISO 10838-2 [7] or ISO 10838-3 [8], as applicable, should

be set up in agreement between user and manufacturer.

EN 1555 covers a range of maximum operating pressures and gives requirements concerning colours and

additives.

NOTE 3 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects,

taking into account their particular requirements and any relevant national regulations and installation practices or codes.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

EN 1555-1:2010, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 1:

General

EN 1555-2:2010, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 2:

Pipes

EN 1555-3:2010, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 3:

Fittings

EN 1555-4:2011, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 4:

Valves

EN 1555-5:2010, Plastics piping systems for the supply of gaseous fuels  Polyethylene (PE)  Part 5:

Fitness for purpose of the system
1) 1 bar = 0,1 MPa.
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EN ISO 6259-1, Thermoplastics pipes ― Determination of tensile properties ― Part 1: General test method

(ISO 6259-1)

EN ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications  Classification,

designation and design coefficient (ISO 12162)

EN ISO 13477, Thermoplastics pipes for the conveyance of fluids  Determination of resistance to rapid

crack propagation (RCP)  Small-scale steady-state test (S4 test) (ISO 13477)
3 Terms and definitions

For the purposes of this document, the following terms and definitions given in EN 1555-1:2010,

EN 1555-2:2010, EN 1555-3:2010, EN 1555-4:2011 and EN 1555-5:2010 and the following apply.

3.1
certification body

impartial body, governmental or non-governmental, possessing the necessary competence and responsibility

to carry out certification of conformity according to given rules of procedure and management

Note 1 to entry: A certification body is preferably compliant with EN 45011 [3].
3.2
inspection body
body that performs inspection
Note 1 to entry: A body can be an organisation or part of an organisation.
Note 2 to entry: An inspection body is accredited to EN ISO/IEC 17020 [5].
3.3
testing laboratory

laboratory which measures, tests, calibrates or otherwise determines the characteristics of the performance of

materials and products

Note 1 to entry: In the context of this part of EN 1555, the materials and products can be subjected to type testing,

batch release testing, process verification testing, audit testing, and witness testing, as applicable.

Note 2 to entry: A testing laboratory is preferably compliant with EN ISO/IEC 17025[9].

3.4
quality management system
management system to direct and control an organisation with regard to quality

Note 1 to entry: Requirements for quality management systems are given in EN ISO 9001 [2].

3.5
quality plan

document setting out the specific quality practices, resources and sequence of activities relevant to a

particular product or range of products
3.6
type testing

testing performed to prove that the material, product, joint or assembly is capable of conforming to the

requirements given in the relevant standard

Note 1 to entry: The type test results remain valid until there is a change in the material or product or assembly

provided that the process verification tests are done regularly.
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3.7
batch release test
BRT

test performed by or on behalf of the manufacturer on a batch of compound or products, which needs to be

satisfactorily completed before the batch can be released
3.8
process verification test
PVT

test performed by or on behalf of the manufacturer on compound or products or joints or assemblies at

specific intervals to confirm that type tests originally performed on the compound or products or joints or

assemblies continue to be valid and the process continues to be capable of producing products which conform

to the requirements given in the relevant standard

Note 1 to entry: Such tests are carried out as a measure of process control and are not related to release of batches

of compound or products.
3.9
audit test

test performed by a test laboratory on behalf of an inspection body or certification body to confirm that the

compound, product, joint or assembly continues to conform to the requirements given in the relevant standard

and to provide information to assess the effectiveness of the quality management system

3.10
indirect test

test performed by or on behalf of the manufacturer, different from that specified test for that particular

characteristic, having previously verified its correlation with the specified test

3.11
witness test

test accepted by an inspection or a certification body for type testing and/or audit testing, which is carried out

by or on behalf of the manufacturer and supervised by a representative of the inspection or certification body,

qualified in testing
3.12
material

composition grouped by families, expressed by generic names, e.g. polypropylene, stainless steel, brass or

EPDM

Note 1 to entry: Definition from European Commission, Directorate-General for Enterprise and Industry, Sub-group on

Product Testing Procedures (EC, DG ENT and IND, SG PTP).
3.13
compound

clearly defined homogenous mixture of base polymer with additives, i.e. antioxidants, pigments, stabilisers

and others, at a dosage level necessary for the processing and the intended use of the final product

3.14
material batch

clearly identified quantity of a given homogeneous compound manufactured continuously under uniform

conditions and defined and identified by the compound manufacturer
3.15
product

pipe, fitting, or valve of a clearly identified type intended to be a part of a piping system which the

manufacturer puts on the market
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3.16
product batch

clearly identified collection of products, manufactured consecutively or continuously under the same

conditions, using the same compound conforming to the same specification

Note 1 to entry: The product batch is defined and identified by the product manufacturer.

3.17
lot
clearly identifiable sub-division of a batch for inspection purposes
3.18
sample

one or more products drawn from the same production batch or lot, selected at random without regard to their

quality
Note 1 to entry: The number of products in the sample is the sample size.
3.19
group

collection of similar products from which samples are selected for testing purposes

3.20
component

product manufactured out of a specific composition or compound, brought to the market as part of another

product or as a spare part

Note 1 to entry: Components are considered as products and are individually approved (e.g. o-rings and gaskets), or

they are tested as integral part of a finished product (e.g. in a valve).
3.21
joint
connection between two products
3.22
assembled product
assembled final product using two or more single parts
3.23
assembly
product that can be dismantled into a set of components
EXAMPLE A test piece consisting of various products.
3.24
sampling plan

specification of the type of sampling to be used combined with the operational specification of the entities or

increments to be taken, the samples to be constituted and the measurements to be made

EXAMPLE A specific plan which indicates the number of units of products or assemblies to be inspected.

3.25
product type
generic description of a product
EXAMPLE A pipe or fitting or valve or their main parts, of the same design.
3.26
body type
generic description of a body
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EXAMPLE A valve body of a particular design, which can have different end connections.

3.27
cavity
space within a mould to be filled to form the moulded product

EXAMPLE That part of an injection mould which gives the form to the injection-moulded product.

4 Abbreviated terms

To avoid misunderstanding, the abbreviations in this Clause are defined as being the same in each language.

For the same reason, the terms are given in the three languages, English, French and German.

AT en : audit test
fr : essai d’audit
de : Überwachungsprüfung
BRT en : batch release test
fr : essai de libération de campagne de fabrication
de : Freigabeprüfung einer Charge
IT en : indirect test
fr : essai indirect
de : indirekte Prüfung
PVT en : process verification test
fr : essai de vérification du procédé de fabrication
de : Prozessüberprüfung
TT en : type test
fr : essai de type
de : Typprüfung
WT en : witness test
fr : essai témoin
de : Prüfung unter Aufsicht
5 General

5.1 Compounds, products, joints and assemblies shall conform to the requirements given in EN 1555-1,

EN 1555-2, EN 1555-3, EN 1555-4, and EN 1555-5.

5.2 Products and assemblies shall be produced by the manufacturer under a quality management system

which includes a quality plan.
6 Testing and inspection
6.1 Grouping
6.1.1 General

For the purposes of this Technical Specification, the groups specified in 6.1.2 and 6.1.3 apply.

6.1.2 Size groups

Three size groups are defined for pipes and fittings, as given in Table 1. For testing purposes, one individual

nominal diameter, d , shall be selected from each group.
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Table 1 — Size groups
Size group Nominal diameter, d
d < 75
2 75 ≤ d < 250
250 ≤ d ≤ 630
6.1.3 Fitting groups

Three groups of fittings each having a similar design are defined, as given in Table 2.

For testing purposes, one individual fitting shall be selected from each group.
Table 2 — Fitting groups
Fitting groups Jointing technique
(A) Electrofusion socket fitting
(B) Electrofusion saddle fitting
(C) Spigot end fitting
6.1.4 Fitting types
Fitting groups are divided in fitting types.

Fitting group (A) includes the following fitting types: Electrofusion couplers, electrofusion 45° elbows,

electrofusion 90° elbows, electrofusion tees, electrofusion reducers, electrofusion end cap, etc.

Fitting group (B) includes the following fitting types: Electrofusion tapping saddles, electrofusion branch

saddles, etc.

Fitting group (C) includes the following fitting types: 45° elbows, 90° elbows, tees, reducers, end caps, etc.

6.2 Type testing

Relevant TTs shall be carried out whenever there is a change in design, in material or production method,

other than routine in-process adjustments, and/or whenever there is an extension of the product range or

change of production site.

Type tests, which are to be carried out when a change of the production site occurs, depend on the extent of

the change. Therefore relevant type tests should be defined individually by the manufacturer.

Type tests shall demonstrate that the products conform to all requirements for the characteristics given in

Tables 3 to 6, as applicable.

In case of change in compound as defined in A.2, relevant type testing requirements as defined in A.3, and in

Tables 3 to 6 as applicable, shall apply.

For the purposes of a change in design, the following characteristics are relevant:

a) dimensions and geometry (see column D1 of Tables 5 and 6), as: change of visual and functional

optimisations, change of overall dimensions, change of a non-PE part;
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kSIST-TS FprCEN/TS 1555-7:2012
FprCEN/TS 1555-7:2012 (E)

b) joint affected part (see column D2 of Tables 5 and 6), as: change of the dimensions of the fusion zone

(e.g. wire pitch, wire depth), the electrical characteristics (e.g. wire, resistance), the fusion parameters

(e.g. time, voltage).

For the extension of the production range, the relevant characteristics given in Table 5 and Table 6, column E,

as applicable, shall be retested. If third party certification is involved, retesting shall be agreed between the

certification body and the manufacturer.

Table 3 — Characteristics of compounds that require type testing (TT) by the compound manufacturer

Reference to part,
clause or
Characteristic Sampling procedure
subclause of
EN 1555
Compound density -1:2010-4.2.3.1 3 samples, Once/compound
Oxidation induction time -1:2010-4.2.3.1 3 samples, Once/compound
(thermal stability)
Melt mass-flow rate (MFR) -1:2010-4.2.3.1 3 samples, Once/compound
Volatile content -1:2010-4.2.3.1 1 sample, Once/compound
Water content -1:2010-4.2.3.1 1 sample, Once/compound
Carbon black content -1:2010-4.2.3.1 3 samples, Once/compound
Carbon black dispersion -1:2010-4.2.3.1 1 sample, Once/compound
Pigment dispersion -1:2010-4.2.3.1 1 sample, Once/compound
Resistance to gas condensate -1:2010-4.2.3.2 1 sample, Once/compound
Resistance to weathering -1:2010-4.2.3.2 Once/compound
Resistance to rapid crack -1:2010-4.2.3.2 Number of test pieces shall conform to
EN ISO 13477, Once/compound
propagation (critical pressure,
p ) (e ≥ 15 mm)
5-5 Number of pieces shall conform to
EN ISO 13477, Once/compound
Resistance to slow crack -1:2010-4.2.3.2 3 test pieces, Once/compound
growth (d : 110 mm SDR 11)
Determination of the failure -1:2010-4.3.1 3 samples, Once/compound
mode in a tensile test on a
-1:2010-4.3.2 3 samples, Once/compound
buttfusion weld (d : 110 mm
SDR 11)
Classification -1:2010-4.4 Shall conform to EN ISO 12162,
Once/compound

Only applicable if the requirement for volatile content is not conformed to. In case of dispute the

requirement for water content shall apply.
Only applicable for black compound.
Only applicable for non black compound.

Three pieces for elongation at break/ Three pieces for hydrostatic strength / One sample for decohesion of

an electrofusion joint.

Resistance to RCP and slow crack growth shall be measured on pipe made from the same compound

batch.
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kSIST-TS FprCEN/TS 1555-7:2012
FprCEN/TS 1555-7:2012 (E)

Table 4 — Characteristics of pipes, including coextruded pipes and peelable layer pipes that require

type testing (TT) (1 of 2)
Reference Conditions
Sampling procedure
to part,
requiring test
clause or
Characteristic
subclause
b b c
N D M E
Manufacturer Certification body
of EN 1555
1 sample of all diameters 1 sample of one diameter/
Appearance -2:2010-5.1
+ + + +
size group
1 sample of all diameters 1 sample of one diameter/
Colour -2:2010-5.2
+ + + +
size group
Geometrical characteristics -2:2010-6
+ - + + 1 sample of all diameters 1 sample of one diameter/
size group
Circumferential reversion -2:2010-6.4
+ - + + 1 sample of all diameters/ 1 sample of one diameter/
size group 3 size group 3
Hydrostatic strength -2:2010-7.2
3 test pieces of one 3 test pieces of one
+ - + +
(20 °C, 100 h) diameter/size group diameter/ size group
Hydrostatic strength -2:2010-7.2
3 test pieces of one 3 test pieces of one
+ - + +
(80 °C, 1 000 h) diameter/size group diameter/ size group
Elongation at break -2:2010-7.2
Number of samples shall Number of samples shall
+ - + +
conform to EN ISO 6259-1, conform to EN ISO 6259-1,
One diameter/size group One diameter/ size group
3 test pieces of one 3 test pieces of one
Resistance to slow crack -2:2010-7.2
diameter/size group diameter/ size group
growth e ≤ 5 mm (Cone + - + +
test)
Resistance to slow crack -2:2010-7.2 3 test pieces of one 3 test pieces of one
diameter/size group diameter/ size group
growth e > 5 mm (Notch
+ - + +
test)
Number of samples shall Number of samples shall
Resistance to rapid crack -2:2010-7.2
conform to EN ISO 13477 confirm EN ISO 13477 of
propagation (critical + + + +
e f of one diameter one diameter
pressure, p )
1 sample of one diameter/ 1 sample of one diameter/
Oxidation induction time -2:2010-8.2
+ - + -
size group size group
(Thermal stability)
i 1 sample of one diameter/ 1 sample of one diameter/
-2:2010-8.2
Melt mass-flow rate (MFR)
+ - + -
size group size group
...

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