CEN/TS 14632:2012

SLOVENSKI STANDARD
01-maj-2012
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Plastics piping systems for drainage, sewerage and water supply, pressure and non-
pressure - Glass-reinforced thermosetting plastics (GRP) based on unsaturated
polyester resin (UP) - Guidance for the assessment of conformity
Kunststoff-Rohrleitungssysteme für die Entwässerung und Wasserversorgung mit und
ohne Druck - Glasfaserverstärkte duroplastische Kunststoffe (GFK) auf der Basis von
ungesättigtem Polyesterharz (UP) - Empfehlungen für die Beurteilung der Konformität
Systèmes de canalisations en plastique pour les branchements, les collecteurs
d'assainissement et l'alimentation en eau, avec ou sans pression - Plastiques
thermodurcissables renforcés de verre (PRV) à base de résine polyester (UP) - Guide
pour l'évaluation de conformité
Ta slovenski standard je istoveten z: CEN/TS 14632:2012
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
83.120 2MDþDQLSROLPHUL Reinforced plastics
91.140.60 Sistemi za oskrbo z vodo Water supply systems
91.140.80 Drenažni sistemi Drainage systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CEN/TS 14632
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
February 2012
ICS 23.040.01; 91.140.60; 91.140.80; 93.030 Supersedes CEN/TS 14632:2006
English Version
Plastics piping systems for drainage, sewerage and water
supply, pressure and non-pressure - Glass-reinforced
thermosetting plastics (GRP) based on unsaturated polyester
resin (UP) - Guidance for the assessment of conformity
Systèmes de canalisations en plastique pour les Kunststoff-Rohrleitungssysteme für die Entwässerung und
branchements, les collecteurs d'assainissement et Wasserversorgung mit und ohne Druck -
l'alimentation en eau, avec ou sans pression - Plastiques Glasfaserverstärkte duroplastische Kunststoffe (GFK) auf
thermodurcissables renforcés de verre (PRV) à base de der Basis von ungesättigtem Polyesterharz (UP) -
résine polyester (UP) - Guide pour l'évaluation de Empfehlungen für die Beurteilung der Konformität
conformité
This Technical Specification (CEN/TS) was approved by CEN on 20 September 2011 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, 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
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 14632:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Introduction .4
1 Scope .6
2 Normative references .6
3 Terms and definitions .7
4 Abbreviated terms .9
5 General .9
6 Testing and inspection . 10
6.1 General . 10
6.2 Type testing . 10
6.3 Audit tests (AT) . 13
6.4 Quality control tests . 15
Annex A (normative) Procedures for dealing with test data provided by the manufacturer and for
witnessed tests in a manufacturer's laboratory . 17
A.1 General . 17
A.2 Test data provided by the manufacturer . 17
A.3 Witnessed tests in a manufacturer's laboratory. 17
Annex B (normative) Definitions of changes in material, design and process . 18
B.1 General . 18
B.2 Change in materials  Reinforcements . 18
B.3 Resins . 19
B.4 Change in design . 20
B.5 Change in process . 20
Annex C (normative) Tests to assess the effects of changes . 21
C.1 Tests . 21
C.2 Evaluation of test results . 21
Annex D (normative) Parameters and criteria for reduced long-term tests (RLTT) . 23
D.1 General . 23
D.2 Reduced long-term test parameters . 23
D.3 Evaluation of results of destructive RLTTs (see D.2.1, D.2.2 and D.2.3). 25
Annex E (normative) Parameters and criteria for dry creep and α and β testing . 30
E.1 General . 30
E.2 Test parameters for the creep factor under dry conditions . 30
E.3 Test parameters for the determination of α and ββββ factors . 30
Annex F (normative) Additional statements for manholes and inspection chambers . 32
F.1 General . 32
F.2 Tests specific to manholes and chambers . 32
F.3 Type tests . 32
F.4 Audit tests . 32
F.5 Batch release tests . 32
Bibliography . 33

Foreword
This document (CEN/TS 14632:2012) 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 14632:2006.
This Technical Specification can be used to support elaboration of national third party certification procedures
for GRP products (glass-reinforced thermosetting plastics based on unsaturated polyester resin) to be used in
piping systems for the transport of water, drainage and sewage.
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, 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.

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 document details the
applicable characteristics to be assessed and the frequency and sampling of testing.
A typical scheme for the assessment of conformity of pipes, fittings and 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 pipes, fittings and assemblies by manufacturers,
including a third-party certification, is given in Figure 2.
Figure 2 — Typical scheme for the assessment of conformity by a manufacturer, including a third-
party certification
1 Scope
This Technical Specification gives guidance on the assessment of conformity of GRP-UP (glass-reinforced
thermosetting resins based on unsaturated polyesters) piping products and assemblies in accordance with
EN 1796 and EN 14364 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.
This Technical Specification also gives guidance on the assessment of conformity of GRP-UP manholes and
inspection chambers in accordance with prEN 15383. Pipes according to EN 14364 are used for
manufacturing the shafts and chamber units. Additional statements as needed to assess the conformity of
manholes and inspection chambers are given in Annex F.
NOTE 1 It is recommended that the quality management system conforms to or is no less stringent than the relevant
requirements to EN ISO 9001 [3].
NOTE 2 If third-party certification is involved, it is recommended that the certification body is accredited to
EN 45011 [1], EN 45012 [2] or EN ISO/IEC 17021 [5], as applicable.
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 681-1, Elastomeric seals — Materials requirements for pipe joint seals used in water and drainage
applications — Part 1: Vulcanized rubber
EN 978:1997, Underground tanks of glass-reinforced plastics (GRP)  Determination of factor alpha and
factor beta
EN 1119, Plastics piping systems  Joints for glass-reinforced thermosetting plastics (GRP) pipes and fittings
 Test methods for leaktightness and resistance to damage of non-thrust resistant flexible joints with
elastomeric sealing elements
EN 1447, Plastics piping systems  Glass-reinforced thermosetting plastics (GRP) pipes  Determination of
long-term resistance to internal pressure
EN 1796:2006+A1:2008, Plastics piping systems for water supply with or without pressure — Glass-reinforced
thermosetting plastics (GRP) based on unsaturated polyester resin (UP)
EN 14364:2006+A1:2008, Plastics piping systems for drainage and sewerage with or without pressure —
Glass-reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP) — Specifications for
pipes, fittings and joints
prEN 15383:2010, Plastics piping systems for drainage and sewerage — Glass-reinforced thermosetting
plastics (GRP) based on polyester resin (UP) — Manholes and inspection chambers
EN ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions (ISO 3126)
ISO 7432, Glass-reinforced thermosetting plastics (GRP) pipes and fittings — Test methods to prove the
design of locked socket-and-spigot joints, including double-socket joints, with elastomeric seals
ISO 7510, Plastics piping systems — Glass-reinforced plastics (GRP) components — Determination of the
amounts of constituents using the gravimetric method
ISO 7684, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination of
the creep factor under dry conditions
ISO 7685:1998, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes —
Determination of initial specific ring stiffness
ISO 8483, Glass-reinforced thermosetting plastics (GRP) pipes and fittings — Test methods to prove the
design of bolted flange joints
ISO 8513, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination of
longitudinal tensile properties
ISO 8521, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Test methods
for the determination of the apparent initial circumferential tensile strength
ISO 8533, Glass-reinforced thermosetting plastics (GRP) pipes and fittings — Test methods to prove the
design of cemented or wrapped joints
ISO 10466, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Test method to
prove the resistance to initial ring deflection
ISO 10468, Glass-reinforced thermosetting plastics (GRP) pipes — Determination of the long-term specific
ring creep stiffness under wet conditions and calculation of the wet creep factor
ISO 10471, Glass-reinforced thermosetting plastics (GRP) pipes — Determination of the long-term ultimate
bending strain and the long-term ultimate relative ring deflection under wet conditions
ISO 10928, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes and fittings —
Methods for regression analysis and their use
ISO 10952, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes and fittings —
Determination of the resistance to chemical attack for the inside of a section in a deflected condition
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1796:2006+A1:2008,
EN 14364:2006+A1:2008 and prEN 15383:2010 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 accredited to EN 45011 [1].
3.2
inspection body
impartial organisation 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
Note 1 to entry: An inspection body is preferably 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 document, 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 accredited to EN ISO/IEC 17025 [6].
3.4
quality management system
management system to direct and control an organization with regard to quality
Note 1 to entry: Requirements for quality management systems are given in EN ISO 9001 [3].
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, 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 products, which has 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 products at specific intervals to confirm that 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 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
product 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 that specified test for that particular
characteristic, having previously verified its correlation with the specified test
3.11
witness test
WT
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
product
pipe, fitting, manhole or inspection chamber of a clearly identified type intended to be a part of a piping system
which the manufacturer puts on the market
3.13
product batch
clearly identified collection of products, manufactured consecutively or continuously under the same
conditions, conforming to the same specification
Note 1 to entry: The production batch is defined and identified by the product manufacturer.
3.14
lot
clearly identifiable sub-division of a batch for inspection purposes
3.15
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.
3.16
group
collection of similar products from which samples are selected for testing purposes
3.17
reduced long-term test
RLTT
test using shorter time periods than those specified for the long-term test
Note 1 to entry: The RLTT results are to be compared to the results from the long-term test to verify that the current
performance of a product conforms to the initially established long-term performance.
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.
EN FR DE
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
RLTT reduced long-term test essai à long-terme écourté verkürzte Langzeitprüfung
TT type test essai de type Typprüfung
WT witness testing essai témoin Prüfung unter Aufsicht
5 General
5.1 The materials, pipes, fittings, joints, manholes and inspection chambers shall conform to the
requirements in EN 1796, EN 14364 and prEN 15383, as applicable.
5.2 Pipes, fittings, joints, manholes and inspection chambers 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
requirements of EN ISO 9001 [3].
5.3 For the effect on water quality, attention is drawn to the requirements of National regulations.
6 Testing and inspection
6.1 General
6.1.1 Records of inspection and test
Unless otherwise specified all records shall be maintained for a minimum of ten years.
6.1.2 Indirect tests
Generally, testing shall be performed according to the test method referred to EN 1796, EN 14364 and
prEN 15383, as applicable.
Indirect testing may be used for BRT and PVT characteristics as given in 6.4.1 and 6.4.2, respectively. Indirect
testing shall not be applied to type testing.
The correlation or safe relationship of the indirect testing to the specified testing shall be documented in the
manufacturer's quality plan. If a third party certification is involved, the IT shall be accepted by the certification
body. The continuing validity of the indirect testing shall be checked at regular intervals. In cases of dispute,
the test methods referred to in EN 1796, EN 14364 and prEN 15383, as applicable, shall be used for BRT or
PVT, using RLTT, where applicable.
6.2 Type testing
6.2.1 General
Type tests shall be conducted in accordance with the requirements and rules given in Annex A and, the
requirements given in 6.2.2 to 6.2.4, as applicable.
6.2.2 Pipe type test group
A pipe type test group consists of a range or family of products made such that the results of the long-term
type tests are applicable to all products in the group. A pipe type test group shall be made of products:
a) manufactured by the same process;
b) with the same material specifications;
c) with the same pipe wall construction (i.e. the sequence of layers, layer compositions, material properties
and design method for using the results of the long-term type tests in determining the pipe wall for all
combinations of DN, PN and SN);
d) tested with the same loading condition (i.e. uniaxial or biaxial load).
The quality management system shall document all process details that could influence type test
performance. The quality management system shall document the complete product design method and
demonstrate how the results of the type tests are used to establish product designs.
Table 1 lists the constituents which are addressed by a certificate of conformity to the pipe-manufacturer's
specification from the material producer. Table 2 lists the characteristics declared by the manufacturer.
Table 3 lists the long-term type tests to be conducted. In addition, all short-term properties listed in Table 6 for
BRT shall be tested and documented for the pipes used for the long-term type tests.
Table 1 — Characteristics for pipe type test (TT) — Constituents covered by a certificate of conformity
Constituents
Glass fibre reinforcements
Thermosetting polyester resins
Fillers
Aggregates
Thermoplastic liners
Elastomers
Metals
Table 2 — Characteristics for pipe type test (TT) — Characteristics declared by the manufacturers
a
Characteristic
Wall construction
Wall thickness
a
The wall construction (the sequence and composition of the individual layers
comprising the pipe wall) shall be documented by the manufacturer. The manufacturer shall
translate the product design into detailed process specifications to control the amount and
placement of material components.

Table 3 — Characteristics for pipe long-term type test (TT) - Characteristics verified by testing
Characteristic Test method Minimum sampling frequency
Pipes
Creep factor under wet conditions ISO 10468 one DN per pipe type test group
Resistance to long-term ultimate ring deflection ISO 10471 one DN per pipe type test group
Long-term failure pressure EN 1447 one DN per pipe type test group
Resistance to strain corrosion for sewer pipe only ISO 10952 one DN per pipe type test group

6.2.3 Joint type test group
6.2.3.1 General
A joint type test group is determined by the configuration of the joint and the loading condition. Joint type test
groups are the following:
a) flanged uniaxial loading;
b) flanged biaxial loading;
c) butt/wrap uniaxial loading;
d) butt/wrap biaxial loading;
e) cemented uniaxial loading;
f) cemented biaxial loading;
g) gasket sealed uniaxial loading;
h) gasket sealed biaxial loading.
NOTE The term “uniaxial loading” refers to pressurization where there is no pressure end thrust component (the
pressure end thrust is taken by the test fixture and not the pipe) and thus the pipe is loaded only in the circumferential
direction while “biaxial loading” refers to pressurization where the pressure end thrust component is carried by the pipe
and thus the pipe is loaded in both circumferential and longitudinal directions.
The joint testing methods give the performance requirements for the various configurations of joints, but
recognizing the very wide range of diameters and pressures it is clearly impractical to test all combinations of
DN/PN. The quality management system shall document the procedures for designing and manufacturing the
joints and include the results of testing programs to verify performance and establish over what range the test
results are applicable and how the design procedures are established and how they apply across the product
range. It is likely that multiple tests will be required to qualify the full range of PN and DN for any given
combination of joint configuration and loading condition and these results shall be documented as part of the
quality management system.
6.2.3.2 Butt/wrap and cemented joints
For butt/wrap and cemented joints, the methodology for designing joints shall be established by conducting
type tests that can be used to establish the procedures for design of the complete range of joints. Butt/wrap
and cemented joints are evaluated according to ISO 8533. When applicable, the bending resistance of end
thrust loaded joints is evaluated according to ISO 8533 or the procedure given in of EN 1796:2006+A1:2008,
Annex A, or EN 14364:2006+A1:2008, Annex A, as applicable, as agreed by manufacturer and purchaser.
6.2.3.3 Bolted flanged joints
For bolted flanged joints, the methodology for design shall be established by conducting type tests that can be
used to establish the procedures for the design of the complete range of joints. Testing of flanged joints shall
also consider the type of gasket (flat face or O-ring) sealing systems. Flanged joints are evaluated according
to ISO 8483. When applicable, the bending resistance of end thrust loaded joints is evaluated according to
ISO 8483 or the procedure given in EN 1796:2006+A1:2008, Annex A, or EN 14364:2006+A1:2008, Annex A,
as applicable, as agreed by manufacturer and purchaser.
6.2.3.4 Elastomeric sealed joints
Elastomeric sealed joints have a laminate design consideration (for example how to determine the thickness
of the bell or coupling and how to contain the gasket seal) as well as many dimensional aspects e.g. the
gasket configuration, gasket size, gasket hardness and spigot to socket gap. Elastomeric sealed joints are
evaluated according to EN 1119 for uniaxial and ISO 7432 for biaxial joints. When applicable, the bending
resistance of end thrust loaded joints are evaluated according to ISO 7432 or the procedure given in
EN 1796:2006+A1:2008, Annex A, or EN 14364:2006+A1:2008, Annex A, as applicable, of as agreed by
manufacturer and purchaser.
6.2.4 Fitting Type Test Groups
A fitting type test group is determined by production method (fabricated or moulded) and loading condition
(uniaxial or biaxial). Fitting groups are the following:
a) fabricated uniaxial loaded;
b) fabricated biaxial loaded;
c) moulded uniaxial loaded;
d) moulded biaxial loaded.
Because of the large range of fittings (bends, tees, reducers, etc) possible and the very wide diameter and
pressure range of GRP fittings, type testing of fabricated fittings shall be directed at evaluation of the validity
of the fitting design and construction procedures. The quality management system shall document the
fabricated fitting design procedures including materials, material properties, sequence of attaching and
reinforcing layups, the process for applying layups and quality control procedures during and after fabrication
for the entire range of fittings produced.
While typically moulded fittings are made over a smaller diameter range than fabricated fittings, the materials
and all process and design details shall be fully documented in the quality management system.
For either fitting production method, the quality management system shall also include the results of a
prototype testing and qualification program that demonstrates fitting performance over the range of available
fittings. The joint test methods may provide a framework for developing the fitting testing procedures. The
prototype test fittings and fitting test program should be selected considering:
e) the range of DN and PN to which the design procedures apply;
f) fitting geometry – e.g. a tee is a far more complex design that say a reducer;
g) how the results of the testing are applied to the full fitting range;
h) influence of layup thickness and thickness/diameter ratio;
i) use of strain gauges and FEM/FEA to correlate the test results and provide data for designing the full
product range.
6.2.5 Permitted special procedure
Where a factory, factory A, uses the same manufacturing procedures, raw materials and design (see
Annex B) as another factory, factory B, then data from factory B may be used by factory A to demonstrate
conformity to the long-term properties subject to all the following conditions:
a) the data provided by factory B fulfil the conditions in Annex A and factory A performs RLTT (see 6.3.2) to
confirm that both factories products have the same long-term properties;
b) if a third party certifying body is involved it shall be informed prior to conducting the RLTT that these
procedures are being used to satisfy the TT requirements.
The procedures detailed in this clause may be applied to TT (see 6.2) and AT (see 6.3), but not to quality
control tests (see 6.4).
6.3 Audit tests (AT)
6.3.1 General
Those characteristics specified in the relevant standard, and listed in Table 4 are intended to be audit tested
at the minimum sampling frequency as given in Table 4.
Where possible the classes selected for tests should be primarily those which have not previously been
subject to audit testing.
When a manufacturer fabricates fittings using pipes of the same classification from which the fittings are to be
used, the audit test for the pipes covering mechanical and chemical characteristics cover these fittings. Where
tests have been witnessed during routine inspections additional tests for audit purposes will not be required.
Reduced long-term type tests (RLTT) as detailed in 6.3.2 may be used for satisfying the relevant audit test
requirements, as well as proving that products still conform to the original specifications. Reduced long-term
tests can thus be used as a comparison with existing long-term data, but not as a basis for a new design.
Table 4 — Characteristics and minimum sampling frequencies for AT
Characteristic Minimum sampling frequency
General
Wall construction (content of glass plus resin) Once/year per pipe type test group

Pipes
Creep under wet conditions Once/ 5 years per pipe type test group
Resistance to long-term ultimate ring deflection Once/5 years per pipe type test group
Long-term failure pressure Once/5 years per pipe type test group
Resistance to strain corrosion for sewer pipe Once/5 years per pipe type test group

a
Joint performance
Flexible joints with elastomeric sealing components
Joint test according to the appropriate
Locked socket and spigot joints with elastomeric sealing components
test method every 5 years. See also
Wrapped and cemented joints
NOTE 2.
Bolted flange joints
NOTE 1 When a manufacturer makes fittings using pipes of the same classification with which the fittings are to be used, the
tests for the pipes covering mechanical and chemical characteristics also cover fittings.
NOTE 2 Joint types manufactured infrequently need only be audit tested once every five years or when manufactured
whichever is the longer period.
NOTE 3 For manufacturers with limited production and infrequent changes the frequency can be reconsidered.

a
Only the joint types most commonly used by a manufacturer may be subject to audit testing. Audit tests covering the joint
profiles most commonly used shall be witnessed over a period of five years.

6.3.2 Reduced long-term tests (RLTT)
Those characteristics that may be subjected to reduced long-term tests to show conformance to the long-term
test requirements are detailed in Table 5.
The reduced long-term test procedures and parameters together with the applicable consequences are given
in Annex E.
Table 5 — Characteristics that may be subjected to RLTT
Characteristic
Pipes
Resistance to long-term ultimate ring deflection
Long-term failure pressure
Resistance to strain corrosion

6.4 Quality control tests
6.4.1 Batch release tests (BRT)
6.4.1.1 Procedure
The manufacturer shall describe in his quality plan the limits used to define a batch for testing purposes.
Typically, a quality control batch consists of products of a particular diameter, stiffness class and pressure
class.
Samples for BRT can be obtained from a pre-manufactured batch, periodically from a continuous production
or other appropriate method, depending on the manufacturing process. At least 1 % of the production shall be
sampled for testing the characteristics detailed in Table 6.
Table 6 — Characteristics for BRT
Characteristic
Pipes
Specified diameters (EN ISO 3126)
Wall thickness (EN ISO 3126)
Length (EN ISO 3126)
Initial specific ring stiffness (ISO 7685)
Resistance to initial ring deflection (ISO 10466)
Initial failure pressure (for pressure pipe only) (ISO 8521)
Initial longitudinal tensile properties (ISO 8513)
Fittings
Bends
Fitting angle and angular tolerances (EN ISO 3126)
Length (EN ISO 3126)
Branches
Length (EN ISO 3126)
Reducers
Wall thickness (EN ISO 3126)
Length (EN ISO 3126)
Flanged adaptors
Wall thickness (EN ISO 3126)
Length (EN ISO 3126)
Joint performance
All joint types
Dimensions (EN ISO 3126)
A batch may be released for supply when all the relevant tests and inspections have been carried out and the
requirements have been met. If one or more items fail one or more tests or inspections, then the retest
procedures detailed in 6.4.1.2 shall be performed.
6.4.1.2 Retesting procedures
6.4.1.2.1 General
The manufacturer’s quality plan shall include a rejecting/retesting procedure to deal with non-conformities.
In the event of non-conformity with one or more characteristic(s) the following procedures apply:
Find the last product, which conforms to the requirements. Release all products produced before that point
and reject all produced after that point. Alternatively, the procedures detailed in 6.4.1.2.2 shall be followed.
6.4.1.2.2 Procedure to be followed when a batch or lot is rejected
When a batch or lot is rejected, one of the following actions shall be taken:
a) the batch or lot shall be scrapped;
or
b) all items in the batch or lot shall be subjected to the test or tests that were failed and only those that pass
shall be released;
or
c) the batch or lot shall be reclassified into a class where the results of the tests meet the requirements of
that class.
6.4.2 Process verification tests (PVT)
The manufacturer shall detail in his quality plan a verification procedure of such a nature and of such a
frequency as to ensure, with reasonable probability, that the long-term properties are maintained. The
frequency of these tests shall complement the frequency of audit tests, if applicable.
The purpose of PVT tests is to assess the conformity of the long-term properties of the product. The
characteristics listed in Table 3 shall be addressed. Test methods referred to in the relevant standard or
indirect tests and observations shall be used (see 6.1.2). Indirect tests and observations may include alternate
accelerated tests or continuous verification of the detailed process specifications. A combination of tests that
are indicative of the same property can be considered.
Where the long-term properties are verified according to the test methods referred to in the relevant standard,
RLTT is recommended when establishing the PVT procedures for use in the manufacturer’s quality plan.
When the results from PVT tests show non-compliance then the process shall be investigated and corrected
and the retest procedures detailed in the manufacturer's quality plan shall be performed. If third party
certification is involved then the certification body shall be informed.
Annex A
(normative)
Procedures for dealing with test data provided by the manufacturer and
for witnessed tests in a manufacturer's laboratory
A.1 General
Test data provided by the manufacturer may only be accepted when it has been produced under a recognized
quality management system.
NOTE Quality management systems conforming to EN ISO 9001:2000 [3] are recognised. Other equivalent quality
management systems may be used.
A.2 Test data provided by the manufacturer
Manufacturer's documentation can include results of tests carried out in approved testing laboratories (those
testing laboratories meeting the requirements of EN ISO/IEC 17025 [6] or EN 45011 [1].
The manufacturer's data shall be traceable to the materials, product design and relevant production practices.
The certification body shall consider data obtained from tests performed in the manufacturer’s laboratory.
A.3 Witnessed tests in a manufacturer's laboratory
A.3.1 General
The certification body shall make an agreement with the manufacturer for type testing (TT) and/or audit testing
(AT) to be done as witnessed testing.
NOTE Examples of reasons for witnessed testing are:
a) the availability of staff qualified in testing, and with experience of the material and product, and the necessary
equipment and facilities provides the most cost effective means of testing the products;
b) the approved testing laboratories, which the certification body might normally use, do not have the necessary
test equipment, e.g. for testing of large diameter pipes;
c) the approved testing laboratories, which the certification body/inspection body might normally use, do not have
the capacity for testing available within a reasonable time scale.
A.3.2 Control of witnessed tests
A representative of the certification body, qualified in testing the material and product in question, shall
witness the tests and check the state of calibration of the test equipment.
For long-term testing the certification body or its representative shall confirm the validity of recorded data.
Results of testing shall be traceable to the raw material, design and current production practices.
Annex B
(normative)
Definitions of changes in material, design and process
B.1 General
The objective of this annex is to define what constitutes a change in a pipeline component's material, design
or process and consequently requiring a certain degree of reassessment of conformity.
NOTE Recommendations about the component characteristics to be counterchecked are given in Annex C.
The manufacturer shall define in his quality plan the following parameters, which have been assessed and
accepted by type testing for use in production:
 processes used to manufacture the products;
 methods used to design the products;
 materials used in the manufacturing process.
When more than one material, design method or process has been assessed and accepted then changing
from one assessed and accepted parameter to another does not constitute a change.
However, what constitutes a change shall be discussed and agreed upon between the involved parties
(certification
...