kSIST-TP FprCEN ISO/TR 22391-7:2010
(Main)Plastics piping systems for hot and cold water installations - Polyethylene of raised temperature resistance (PE-RT) - Part 7: Guidance for the assessment of conformity (ISO/DTR 22391-7:2010)
Plastics piping systems for hot and cold water installations - Polyethylene of raised temperature resistance (PE-RT) - Part 7: Guidance for the assessment of conformity (ISO/DTR 22391-7:2010)
This Technical REPORT gives guidance for the assessment of conformity to be included in the manufacturer's quality plan as part of his quality system. This Technical Specification includes: a) requirements for materials, components, joints and assemblies given in the applicable Part(s) of ISO/FDIS 22391; b) requirements for the manufacturer's quality system; NOTE 1 It is recommended that the quality system conforms to ISO 9001:2000[2]. c) definitions and procedures to be applied if third party certification is involved. NOTE 2 If third party certification is involved, it is recommended that the certification body is accredited to EN 45011[3] or EN 45012[4], as applicable. In conjunction with the other Parts of ISO/FDIS 22391 (see Foreword), this Part is applicable to Polyethylene of raised temperature resistance (PE-RT) piping systems intended to be used for hot and cold water installations within buildings for the conveyance of water, whether or not intended for human consumption (domestic systems), under design pressures and temperatures appropriate to the class of application (see Table 1 of ISO/FDIS 22391-1:(2008)).
Kunststoff-Rohrleitungssysteme für die Warm- und Kaltwasserinstallation - Polyethylen erhöhter Temperaturbeständigkeit (PE-RT) - Teil 7: Empfehlungen für die Beurteilung der Konformität (ISO/DTR 22391-7:2010)
Dieser Teil von ISO 22391 enthält Empfehlungen für die Beurteilung der Konformität von Erzeugnissen und Bauteilkombinationen entsprechend des/der zutreffenden Teile(s) von ISO 22391 die als Teil des Qualitäts-managementsystems im Qualitätssicherungsplan des Herstellers und für die Einführung von Verfahren der Drittstellenzertifizierung vorgesehen sind.
Zusammen mit den übrigen Teilen gilt dieser Teil von ISO 22391 für Rohrleitungssysteme, die in der Warm- und Kaltwasserinstallation innerhalb von Gebäuden für den Transport von Trink- oder Brauchwasser (Hausinstallation) sowie für Heizungsanlagen unter Berücksichtigung des betreffenden zulässigen Betriebsdruckes und der für die jeweilige Anwendungsklasse geltenden Temperaturen eingesetzt werden.
Systèmes de canalisations en plastique pour les installations d'eau chaude et froide - Polyéthylène de meilleure résistance à la température (PE-RT) - Partie 7: Directives pour l'évaluation de la conformité (ISO/DTR 22391-7:2010)
Cevni sistemi iz polimernih materialov za napeljave z vročo in hladno vodo - Polietilen s povečano temperaturno odpornostjo (PE-RT) - 7. del: Navodilo za ugotavljanje skladnosti (ISO/DTR 22391-7:2010)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
kSIST-TP FprCEN ISO/TR 22391-7:2010
01-september-2010
&HYQLVLVWHPLL]SROLPHUQLKPDWHULDORY]DQDSHOMDYH]YURþRLQKODGQRYRGR
3ROLHWLOHQVSRYHþDQRWHPSHUDWXUQRRGSRUQRVWMR 3(57 GHO 1DYRGLOR]D
XJRWDYOMDQMHVNODGQRVWL ,62'75
Plastics piping systems for hot and cold water installations - Polyethylene of raised
temperature resistance (PE-RT) - Part 7: Guidance for the assessment of conformity
(ISO/DTR 22391-7:2010)
Kunststoff-Rohrleitungssysteme für die Warm- und Kaltwasserinstallation - Polyethylen
erhöhter Temperaturbeständigkeit (PE-RT) - Teil 7: Empfehlungen für die Beurteilung
der Konformität (ISO/DTR 22391-7:2010)
Systèmes de canalisations en plastique pour les installations d'eau chaude et froide -
Polyéthylène de meilleure résistance à la température (PE-RT) - Partie 7: Directives pour
l'évaluation de la conformité (ISO/DTR 22391-7:2010)
Ta slovenski standard je istoveten z: FprCEN ISO/TR 22391-7
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
91.140.60 Sistemi za oskrbo z vodo Water supply systems
kSIST-TP FprCEN ISO/TR 22391-7:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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kSIST-TP FprCEN ISO/TR 22391-7:2010
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kSIST-TP FprCEN ISO/TR 22391-7:2010
TECHNICAL REPORT
FINAL DRAFT
FprCEN ISO/TR 22391-7
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
June 2010
ICS 93.025; 91.140.60; 23.040.01
English Version
Plastics piping systems for hot and cold water installations -
Polyethylene of raised temperature resistance (PE-RT) - Part 7:
Guidance for the assessment of conformity (ISO/DTR 22391-
7:2010)
Systèmes de canalisations en plastique pour les Kunststoff-Rohrleitungssysteme für die Warm- und
installations d'eau chaude et froide - Polyéthylène de Kaltwasserinstallation - Polyethylen erhöhter
meilleure résistance à la température (PE-RT) - Partie 7: Temperaturbeständigkeit (PE-RT) - Teil 7: Empfehlungen
Directives pour l'évaluation de la conformité (ISO/DTR für die Beurteilung der Konformität (ISO/DTR 22391-
22391-7:2010) 7:2010)
This draft Technical Report is submitted to CEN members for Technical Committee Approval. 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 and United Kingdom.
Warning : This document is not a Technical Report. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a Technical Report.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN ISO/TR 22391-7:2010: E
worldwide for CEN national Members.
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kSIST-TP FprCEN ISO/TR 22391-7:2010
FprCEN ISO/TR 22391-7:2010 (E)
Contents Page
Foreword .3
2
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kSIST-TP FprCEN ISO/TR 22391-7:2010
FprCEN ISO/TR 22391-7:2010 (E)
Foreword
This document (FprCEN ISO/TR 22391-7:2010) has been prepared by Technical Committee ISO/TC 138
"Plastics pipes, fittings and valves for the transport of fluids" in collaboration 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 parallel TC Approval.
3
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kSIST-TP FprCEN ISO/TR 22391-7:2010
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kSIST-TP FprCEN ISO/TR 22391-7:2010
TECHNICAL ISO/TR
REPORT 22391-7
First edition
2010-##-##
Plastics piping systems for hot and cold
water installations — Polyethylene of
raised temperature resistance (PE-RT) —
Part 7:
Guidance for the assessment
of conformity
Systèmes de canalisations en plastique pour les installations d'eau
chaude et froide — Polyéthylène de meilleure résistance à la
température (PE-RT) —
Partie 7: Directives pour l'évaluation de la conformité
PROOF/ÉPREUVE
Reference number
ISO/TR 22391-7:2010(E)
©
ISO 2010
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kSIST-TP FprCEN ISO/TR 22391-7:2010
ISO/TR 22391-7:2010(E)
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ii PROOF/ÉPREUVE © ISO 2010 – All rights reserved
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kSIST-TP FprCEN ISO/TR 22391-7:2010
ISO/TR 22391-7:2010(E)
ISO/CEN PARALLEL PROCESSING
This draft Technical Report has been developed within the European Committee for Standardization (CEN),
and processed under the CEN-lead mode of collaboration as defined in the Vienna Agreement.
This draft Technical Report is hereby submitted to a parallel three-month P-member vote in the ISO/TC
concerned and technical committee approval vote in CEN.
© ISO 2010 – All rights reserved PROOF/ÉPREUVE iii
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kSIST-TP FprCEN ISO/TR 22391-7:2010
ISO/TR 22391-7:2010(E)
Contents Page
Foreword. v
Introduction . vi
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Abbreviated terms .5
5 General.6
6 Testing and inspection.6
6.1 Grouping.6
6.2 Type testing.7
6.3 Batch release tests .10
6.4 Process verification tests .11
6.5 Audit tests .12
6.6 Indirect tests.13
6.7 Test records .14
Bibliography .15
iv PROOF/ÉPREUVE © ISO 2010 – All rights reserved
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kSIST-TP FprCEN ISO/TR 22391-7:2010
ISO/TR 22391-7:2010(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
In exceptional circumstances, when a technical committee has collected data of a different kind from that
which is normally published as an International Standard (“state of the art”, for example), it may decide by a
simple majority vote of its participating members to publish a Technical Report. A Technical Report is entirely
informative in nature and does not have to be reviewed until the data it provides are considered to be no
longer valid or useful.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TR 22391-7 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 155, Plastics piping systems and ducting systems, in collaboration with ISO Technical Committee
ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 2, Plastics pipes
and fittings for water supplies, in accordance with the Agreement on technical cooperation between ISO and
CEN (Vienna Agreement).
ISO 22391 consists of the following parts, under the general title Plastics piping systems for hot and cold
water installations — Polyethylene of raised temperature resistance (PE-RT):
⎯ Part 1: General
⎯ Part 2: Pipes
⎯ Part 3: Fittings
⎯ Part 5: Fitness for purpose of the system
⎯ Part 7: Guidance for the assessment of conformity [Technical Report]
© ISO 2010 – All rights reserved PROOF/ÉPREUVE v
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kSIST-TP FprCEN ISO/TR 22391-7:2010
ISO/TR 22391-7:2010(E)
Introduction
At the date of publication of this part of ISO 22391, System Standards for piping systems of other plastics
materials used for the same application are the following:
ISO 15874 (all parts), Plastics piping systems for hot and cold water installations — Polypropylene (PP)
ISO 15875 (all parts), Plastics piping systems for hot and cold water installations — Crosslinked polyethylene
(PE-X)
ISO 15876 (all parts), Plastics piping systems for hot and cold water installations — Polybutylene (PB)
ISO 15877 (all parts), Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl
chloride) (PVC-C)
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 ISO 22391 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 pipes, fittings, valves or assemblies by manufacturers is
given in Figure 1.
Product
Production
development
TTs BRTs (each batch)
PVTs (periodically on selected items)
Test performed by or on behalf of the manufacturer
Figure 1 — Typical scheme for the assessment of conformity by a manufacturer
A typical scheme for the assessment of conformity of pipes, fittings, valves or assemblies by manufacturers,
including a third-party certification, is given in Figure 2.
vi PROOF/ÉPREUVE © ISO 2010 – All rights reserved
01-01-year n
01-01-year n+1
Batch
Batch
Batch
Batch
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kSIST-TP FprCEN ISO/TR 22391-7:2010
ISO/TR 22391-7:2010(E)
Tests performed by a test laboratory on behalf of an inspection body
or certification body
ATs AT AT AT ATs
Product
Production
development
TTs BRTs (each batch)
PVTs (periodically on selected items)
Test performed by or on behalf of the manufacturer
Figure 2 — Typical scheme for the assessment of conformity by a manufacturer,
including a third-party certification
This part of ISO 22391 specifies the requirements for a piping system when made from polyethylene (PE-RT).
The piping system is intended to be used for hot and cold water installations and heating system installations.
See the foreword for a complete listing of all available parts of ISO 22391.
This part of ISO 22391 gives guidance for the assessment of conformity of materials, components, joints, and
assemblies. It is intended for use by certification bodies, inspection bodies, testing laboratories, and
manufacturers.
© ISO 2010 – All rights reserved PROOF/ÉPREUVE vii
01-01-year n
01-01-year n+1
Batch
Batch
Batch
Batch
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kSIST-TP FprCEN ISO/TR 22391-7:2010
TECHNICAL REPORT ISO/TR 22391-7:2010(E)
Plastics piping systems for hot and cold water installations —
Polyethylene of raised temperature resistance (PE-RT) —
Part 7:
Guidance for the assessment of conformity
1 Scope
This part of ISO 22391 gives guidance on the assessment of conformity of products and assemblies in
accordance with other applicable part(s) of ISO 22391 intended to be included in the manufacturer's quality
plan as part of the quality management system and for the establishment of third-party certification procedures.
In conjunction with the other parts, this part of ISO 22391 is applicable to hot and cold water installations
within buildings for the conveyance of water, whether or not intended for human consumption (domestic
systems), under design pressures and temperatures appropriate to the class of application.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3951-1, Sampling procedures for inspection by variables ― Part 1: Specification for single sampling plans
indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic and a
single AQL
ISO 3951-2, Sampling procedures for inspection by variables ― Part 2: General specification for single
sampling plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection of independent quality
characteristics
ISO 3951-3, Sampling procedures for inspection by variables ― Part 3: Double sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3951-5, Sampling procedures for inspection by variables ― Part 5: Sequential sampling plans indexed by
acceptance quality limit (AQL) for inspection by variables (known standard deviation)
ISO 22391-1, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 1: General
ISO 22391-2, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 2: Pipes
ISO 22391-3, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 3: Fittings
ISO 22391-5, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 5: Fitness for purpose of the system
© ISO 2010 – All rights reserved PROOF/ÉPREUVE 1
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ISO/TR 22391-7:2010(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 22391-1:2009, ISO 22391-2:2009,
ISO 22391-3:2009 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
[7]
NOTE A certification body is preferably accredited to ISO/IEC Guide 65 .
3.2
inspection body
impartial organization or company, approved by the certification body as possessing the necessary
competence to verify and/or to carry out initial type testing, audit testing and inspection of the manufacturer's
factory production control in accordance with the relevant standard
[3]
NOTE An inspection body is preferably accredited to ISO/IEC 17020 .
3.3
testing laboratory
laboratory which measures, tests, calibrates or otherwise determines the characteristics of the performance of
materials and products
NOTE 1 In the context of this part of ISO 22391, the materials and products can be subjected to type testing, batch
release testing, process verification testing, audit testing, and witness testing, as applicable.
[5]
NOTE 2 A testing laboratory is preferably accredited to ISO/IEC 17025 .
3.4
quality management system
management system to direct and control an organization with regard to quality
[2]
NOTE Requirements for quality management systems are given in ISO 9001 .
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
TT
testing performed to prove that the material, component, joint or assembly is capable of conforming to the
requirements given in the relevant standard
NOTE 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 components, which has to be satisfactorily
completed before the batch can be released
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ISO/TR 22391-7:2010(E)
3.8
process verification test
PVT
test performed by or on behalf of the manufacturer on materials, components, joints or assemblies at specific
intervals to confirm that the process continues to be capable of producing components which conform to the
requirements given in the relevant standard
NOTE Such tests are not required to release batches of products and are carried out as a measure of process
control.
3.9
audit test
AT
test performed by a test laboratory on behalf of an inspection body or certification body to confirm that the
material, component, 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
IT
test performed by or on behalf of the manufacturer, different from the test specified for that particular
characteristic, having previously verified its correlation with the specified test
3.11
witness test
WT
testing 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
clearly defined type of compound
3.13
compound
clearly defined homogeneous mixture of base polymer with additives, i.e. antioxidants, pigments, stabilizers
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 under uniform conditions, and
defined and identified by the compound manufacturer
3.15
product
thing or substance produced by a natural or artificial process
EXAMPLE Pipe, fitting, or valve of a clearly identified type intended to be a part of a piping system.
3.16
production batch
clearly identified collection of units, manufactured consecutively or continuously under the same conditions,
using material or compound conforming to the same specification
NOTE The production batch is defined and identified by the product manufacturer.
3.17
lot
clearly identifiable sub-division of a batch for inspection purposes
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ISO/TR 22391-7:2010(E)
3.18
sample
one or more units of product drawn from a batch or lot, selected at random without regard to their quality
NOTE The number of products in the sample is the sample size.
3.19
pipe batch
collection of pipes of the same characteristics, manufactured from the same compound or formulation on the
same machine
NOTE The pipe batch is defined and identified by the pipe manufacturer.
3.20
fitting batch
collection of fittings of the same characteristics, manufactured from the same compound or formulation on the
same machine
NOTE The fitting batch is defined and identified by the fitting manufacturer.
3.21
valve batch
collection of valves of the same characteristics, manufactured from the same compound or formulation on the
same machine
NOTE The valve batch is defined and identified by the valve manufacturer.
3.22
acceptable quality limit
AQL
quality level that is the worst tolerable process average when a continuing series of lots is submitted for
acceptance sampling
NOTE 1 See ISO 2859-1, ISO 3951-1, ISO 3951-2, ISO 3951-3, and ISO 3951-5.
NOTE 2 The designation of an AQL does not imply that a manufacturer has the right knowingly to supply any
nonconforming unit of product.
3.23
inspection level
relationship between the lot or batch size and the sample size
NOTE See ISO 2859-1.
3.24
limiting quality
〈acceptance sampling〉 quality level, when a lot is considered in isolation, which, for the purposes of
acceptance sampling inspection, is limited to a low probability of acceptance
[1]
NOTE See ISO 2859-2 .
3.25
group
collection of similar components from which samples are selected for testing purposes
3.26
single component
single part as a final product or a part of an assembled final product
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ISO/TR 22391-7:2010(E)
3.27
assembled component
assembled final product using two or more single parts
3.28
assembly
product that can be dismantled into a set of components
EXAMPLE A test piece consisting of various products.
3.29
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 or tests to be made
EXAMPLE A specific plan which indicates the number of units of products or assemblies to be inspected.
3.30
product type
generic description of a product
EXAMPLE A pipe or fitting or valve or their main parts, of the same design, from a particular compound.
3.31
body type
generic description of a body
EXAMPLE A valve body of a particular design, which can have different end connections.
3.32
cavity
〈moulding〉 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 three languages, English, French, and German.
EXAMPLE In the French language, the abbreviation for the French equivalent of “acceptable quality level” (AQL) is
NQA; however, for the purposes of this part of ISO 22391, the abbreviation of the English term (AQL) is adopted.
EN FR DE
AQL acceptance quality limit niveau de qualité acceptable annehmbare Qualitätsgrenzlage
AT audit test essai d’audit Überwachungsprüfung
BRT batch release test essai de libération de campagne de fabrication Freigabeprüfung einer Charge
IT indirect test essai indirect indirekte Prüfung
PVT process verification test essai de vérification du procédé de fabrication Prozessüberprüfung
TT type test essai de type Typprüfung
WT witness testing essai témoin Prüfung unter Aufsicht
© ISO 2010 – All rights reserved PROOF/ÉPREUVE 5
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kSIST-TP FprCEN ISO/TR 22391-7:2010
ISO/TR 22391-7:2010(E)
5 General
5.1 Materials, products and joints/assemblies shall conform to the requirements given in ISO 22391-1,
ISO 22391-2, ISO 22391-3, and ISO 22391-5.
5.2 Products and assemblies shall be produced by the manufacturer under a quality management system
which includes a quality plan.
It is recommended that the quality management system conforms to or is no less stringent than the relevant
[2]
requirements of ISO 9001 .
5.3 For the effect on water quality, attention is drawn to the requirements of national regulations (see the
introduction).
6 Testing and inspection
6.1 Grouping
6.1.1 General
For the purposes of this Technical Report, the groups specified in 6.1.2 to 6.1.4 apply.
6.1.2 Pressure groups
Two pressure groups are defined, as given in Table 1.
For testing purposes, one individual operating pressure, p , shall be selected for each group.
o
Table 1 — Pressure groups
Operating pressure
Pressure group
p
o
a
bar
1 4; 6
2 8; 10
a 5 2
1 bar = 0,1 MPa = 10 Pa = 0,1 N/mm .
6.1.3 Size groups
Two size groups are defined for pipes and fittings, as given in Table 2.
For testing purposes, one individual nominal diameter, d , shall be selected from each group.
n
Table 2 — Size groups
Nominal diameter
Size group d
n
mm
1 10 u d u 63
n
2 63 < d u 160
n
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ISO/TR 22391-7:2010(E)
6.1.4 Fitting groups
Four groups of fittings each having a similar design are defined, as given in Table 3.
For testing purposes, one individual fitting shall be selected from each group.
Table 3 — Fitting groups
Fitting group Type of fitting
1 Bends
2 Elbows, tees
3 Reducers, couplers, end caps
4 Unions, flange adaptors, adaptor pieces or their plastics parts and others
6.2 Type testing
Relevant TTs shall be carried out whenever there is a change in design, material or production method, other
than routine in-process adjustments, and whenever there is an extension of the product range.
TTs shall demonstrate that the products conform to all requirements for the characteristics given in Tables 5
to 7, as applicable.
Conditions considered as leading to a change of material are given in Table 4. The characteristics and the
values of w (see Table 4) shall be specified by the manufacturer in their quality plan.
If any characteristic is changed or any level exceeds the band, this variation in formulation constitutes a
change in material and the relevant characteristics given in Tables 5 and 6, as applicable, shall be retested. If
th
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