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 FprEN 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 isF 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 17885, guidance for assessment of conformity is not given in this part of EN 1555. When requested, a quality plan based on the tests mentioned 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

Dieses Dokument 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.
Dieses Dokument gibt Empfehlungen dazu, dass das Qualitätssicherungssystem entweder die einschlägigen Anforderungen von EN ISO 9001 [1] 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 [2], EN 45012 [3] oder EN ISO/IEC 17020 [4] entsprechen.
Zusammen mit den Teilen 1 bis 5 der EN 1555 (siehe Vorwort) gilt dieses Dokument 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, en: maximum operating pressure) 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 ISO 17885 entsprechen, sind in diesem Teil von EN 1555 keine Empfehlungen für die Konformitätsbewertung enthalten. Wird eine solche Bewertung gefordert, sollte im Einvernehmen zwischen Anwender und Hersteller ein Qualitätssicherungsplan erstellt werden, der auf den genannten Prüfungen basiert.
EN 1555 deckt einen Bereich maximal zulässiger Betriebsdrücke ab und legt Anforderungen an die Einfärbung von Rohrleitungsteilen fest.
ANMERKUNG 3 Der Käufer bzw. Auftraggeber ist unter Berücksichtigung der eigenen Anforderungen sowie der geltenden 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) — Teil 7: Guide pour l'évaluation de la conformité

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, proizvodov, spojev in sestavov z ustreznimi deli standarda FprEN 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 barov;
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 izpolnjujejo zahteve standarda ISO 17885. Uporabnik in proizvajalec naj bi na zahtevo sporazumno uvedla poslovnik kakovosti na podlagi omenjenih preskusov.
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 ustrezne nacionalne predpise in prakse ali kodekse vgradnje.

General Information

Status
Published
Publication Date
06-Jan-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
29-Dec-2021
Due Date
05-Mar-2022
Completion Date
07-Jan-2022

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SLOVENSKI STANDARD
SIST-TS CEN/TS 1555-7:2022
01-februar-2022
Nadomešča:
SIST-TS CEN/TS 1555-7:2013

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) - Teil 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 1555-7:2021
ICS:
83.140.30 Polimerne cevi in fitingi za Plastics pipes and fittings for
snovi, ki niso tekočine non fluid use
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
SIST-TS CEN/TS 1555-7:2022 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 1555-7:2022
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SIST-TS CEN/TS 1555-7:2022
CEN/TS 1555-7
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
December 2021
TECHNISCHE SPEZIFIKATION
ICS 23.040.01; 91.140.40 Supersedes CEN/TS 1555-7:2013
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 Kunststoff-Rohrleitungssysteme für die Gasversorgung

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

(PE) - Teil 7: Guide pour l'évaluation de la conformité Beurteilung der Konformität

This Technical Specification (CEN/TS) was approved by CEN on 17 October 2021 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 1555-7:2021 E

worldwide for CEN national Members.
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CEN/TS 1555-7:2021 (E)
Contents Page

European foreword ............................................................................................................................................. 3

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

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

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

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

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

5 General ....................................................................................................................................................11

6 Testing and inspection ......................................................................................................................11

6.1 Grouping .................................................................................................................................................11

6.1.1 General ....................................................................................................................................................11

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

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

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

6.2 Type testing ...........................................................................................................................................12

6.3 Batch release tests ..............................................................................................................................22

6.4 Process verification tests .................................................................................................................26

6.5 Audit tests ..............................................................................................................................................30

6.6 Indirect tests .........................................................................................................................................35

6.7 One-off products and products produced in very low quantity .........................................36

6.8 Large diameter products ..................................................................................................................36

6.9 Documentation .....................................................................................................................................36

6.9.1 6.9.1Type test results ........................................................................................................................36

6.9.2 Test records ..........................................................................................................................................36

6.9.3 Technical file for certification purposes .....................................................................................36

Annex A (normative) Change of compound ..............................................................................................37

A.1 General ....................................................................................................................................................37

A.2 Change .....................................................................................................................................................37

A.2.1 Change of base polymer ....................................................................................................................37

A.2.2 Change of grade ....................................................................................................................................37

A.2.3 Change of pigment ..............................................................................................................................37

A.2.4 Change of additives other than pigments ...................................................................................37

A.3 Type testing required for re-evaluation .....................................................................................37

A.3.1 Changes A.2.1 and A.2.3.1 .................................................................................................................37

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 ...............................38

Annex B (informative) Basic test matrix for PE compounds and piping products ...........................39

Bibliography ........................................................................................................................................................43

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CEN/TS 1555-7:2021 (E)
European foreword

This document (CEN/TS 1555-7:2021) 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 shall not be held responsible for identifying any or all such patent rights.

This document supersedes CEN/TS 1555-7:2013.
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/DTS 1555-7 takes into account the technical changes made in the revision of

EN 1555-1, -2, -3, -4 and -5, published in 2021. 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.

The revision of this System Standard has been carried out to add the PE 100-RC type materials with

enhanced resistance to slow crack growth. The size range has been increased to 800 mm diameter, test

methods have been updated, and new test methods have been added for PE 100-RC materials.

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

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

following countries are bound to announce this Technical Specification: 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, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
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CEN/TS 1555-7:2021 (E)
Introduction

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

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 1555-7:2021 (E)

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

certification
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CEN/TS 1555-7:2021 (E)
1 Scope

This document 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.

This document gives recommendations that the quality management system conforms to or is no less

stringent than the relevant requirements to EN ISO 9001 [1].

NOTE 1 If certification is involved, the certification and inspection body is preferably compliant with EN

ISO/IEC 17065 [2], EN IS0/IEC 17021 [3] or EN ISO/IEC 17020 [4], as applicable.

In conjunction with Parts 1 to 5 of EN 1555 (see Foreword), this document 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 17885, guidance for assessment of conformity is not given in

this part of EN 1555. When requested, a quality plan based on the tests mentioned should be set up in

agreement between user and manufacturer.

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

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 1555-1:2021, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 1:

General

EN 1555-2:2021, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 2: Pipes

EN 1555-3:2021, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 3:

Fittings

EN 1555-4:2021, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 4:

Valves

EN 1555-5:2021, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 5:

Fitness for purpose of the system
1 5 2
1 bar = 0,1 MPa. = 10 Pa; 1 MPa = 1 N/mm
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3 Terms and definitions

For the purposes of this document, the following terms and definitions given in EN 1555-1:2021,

EN 1555-2:2021, EN 1555-3:2021, EN 1555-4:2021 and EN 1555-5:2021 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 ISO/IEC 17065 [2].

3.2
inspection body
organization or part of an organization that performs inspection
Note 1 to entry: An inspection body is accredited to EN ISO/IEC 17020 [4].
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[5].

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 [1].

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.
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
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CEN/TS 1555-7:2021 (E)
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

Note 1 to entry: Annex A gives the testing requirements for changes made to the compound.

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
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CEN/TS 1555-7:2021 (E)
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
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

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CEN/TS 1555-7:2021 (E)

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.
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
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5 General

5.1 Compounds, products, joints and assemblies shall conform to the requirements given in

EN 1555-1:2021, EN 1555-2:2021, EN 1555-3:2021, EN 1555-4:2021, and EN 1555-5:2021.

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

Four 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
Nominal diameter, d
Size group
1 d < 75
2 75 ≤ d < 250
3 250 ≤ d < 710
4 710 ≤ d ≤ 800
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.
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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.

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.
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SIST-TS CEN/TS 1555-7:2022
CEN/TS 1555-7:2021 (E)

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 −1:2021–5.2.3.1 Once/ compound
Oxidation induction time −1:2021–5.2.3.1 Once/ compound
(thermal stability)
Melt mass-flow rate (MFR) −1:2021–5.2.3.1 Once/ compound
Volatile content −1:2021–5.2.3.1 Once/ compound
Water content −1:2021–5.2.3.1 Once/ compound
Carbon black content −1:2021–5.2.3.1 Once/ compound
Carbon black dispersion −1:2021–5.2.3.1 Once/ compound
Pigment dispersion −1:2021–5.2.3.1 Once/ compound
Resistance to gas −1:2021–5.2.3.2 Once/ compound
condensate
Resistance to weathering −1:2021–5.2.3.2 Once/ compound
Resistance to rapid crack −1:2021–5.2.3.2 Once/ compound
propagation (critical
pressure, p ) (e ≥ 15 mm)
−5:2021–6 Once/ compound
Resistance to slow crack −1:2021–5.2.3.2 Once/ compound
growth for PE 80 and PE
100
Notched Pipe Test (NPT)
(d : 110 mm SDR 11)
Resistance to slow crack −1:2021–5.2.3.1 Once/ compound
growth
for PE 100-RC
Strain-Hardening test (SHT)
Resistance to slow crack −1:2021–5.2.3.1 Once/ compound
growth
for PE 100-RC
Cracked Round Bar test
(CRB)
Resistance to slow crack −1:2021–5.2.3.1 Once/ compound
growth
for PE 100-RC
Accelerated FNCT test
(AFNCT)
---------------------- Page: 15 ----------------------
SIST-TS CEN/TS 1555-7:2022
CEN/TS 1555-7:2021 (E)
Reference to
part, clause or
Characteristic Sampling procedure
subclause of
EN 1555
Resistance to slow crack −1:2021–5.2.3.2 Once/ compound
growth
for PE 100-RC
Accelerated Notched Pipe
test ANPT
(d : 110 mm SDR 11)
Determination of the failure −1:2021–5.3.1 Once/ compound
mode in a tensile test on a
−1:2021–5.3.2 Once/ compound
buttfusion weld (d :
110 mm SDR 11)
Classification −1:2021–5.4 Once/ compound
Volatile or water content shall be measured. 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 compound or pipe
made from the same compound batch.
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SIST-TS CEN/TS 1555-7:2022
CEN/TS 1555-7:2021 (E)

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

require type testing (TT)
Reference to Conditions
Sampling procedure
part, clause or requiring test
Characteristic
subclause of
b b,c
N D M E Manufacturer Certification body
EN 1555
Appearance −2:2021–6.1 Each diameter One diameter/ size
+ + + +
group
Colour −2:2021–6.2 Each diameter One diameter/ size
+ + + +
group
Geo
...

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