Thermoplastic and flexible metal pipework for underground installation at petrol filling stations

This European Standard specifies requirements for underground pipework systems used to transfer liquid fuels and their vapours at petrol filling stations. Minimum performance requirements covering fitness for purpose, safety and environmental protection are given.
This European Standard applies to pipework made from thermoplastics, which may include some degree of reinforcement, and to flexible metal pipework. It does not apply to fibre reinforced thermosets, commonly referred to as glass fibre reinforced plastic (GRP), nor to rigid metals.
This document applies to:
-   delivery pipes from tanks to dispensers, including positive pressure, vacuum suction and siphon modes;
-   fill pipes from road tankers to tanks;
-   vapour recovery and vent pipework;
-   pipework for secondary containment;
-   fittings.
It does not apply to pipework for use with liquefied petroleum gas.

Thermoplastische und flexible metallene Rohrleitungen für erdverlegte Installationen für Tankstellen

Diese Europäische Norm legt Anforderungen an erdverlegte Rohrleitungssysteme fest, die für die Beförderung von flüssigen Kraftstoffen und deren Dämpfen an Tankstellen eingesetzt werden. Angegeben sind Mindestleistungsanforderungen an Gebrauchstauglichkeit, Sicherheit und Umweltschutz.
Diese Europäische Norm gilt für Rohrleitungen aus thermoplastischen Kunststoffen, die einen bestimmten Anteil an Verstärkungswerkstoffen enthalten können, und für flexible Rohrleitungen aus Metall. Es gilt weder für faser¬verstärkte Duroplaste, üblicherweise als glasfaserverstärkte Kunststoffe (GFK) bezeichnet, noch für biegesteife Metalle.
Dieses Dokument gilt für:
-   Förderrohre von Tanks zu Zapfsäulen, einschließlich in Überdruck-, Vakuumsaug- und Siphon-Betriebsart;
-   Füllleitungen von Straßentankfahrzeugen zu Tanks;
-   Gasrückführ- und Entlüftungsleitungen;
-   Rohrleitungen für Schutzrohre;
-   Rohrverbindungsstücke.
Es gilt nicht für Rohrleitungen für den Transport von Flüssiggas.

Tuyauteries enterrées thermoplastiques et tuyauteries métalliques flexibles pour stations-service

La présente norme Européenne spécifie les exigences relatives aux systèmes de tuyauteries enterrées utilisées pour le transfert des carburants liquides et de leurs vapeurs dans les stations-service. Il donne les exigences relatives aux performances minimales couvrant l'aptitude à l'emploi, la sécurité et la protection de l'environnement.
La présente norme Européenne s'applique aux tuyauteries en matériaux thermoplastiques pouvant comporter certains renforts, ainsi qu'aux tuyauteries métalliques flexibles. Il ne s'applique ni aux matériaux thermodurcissables renforcés par des fibres, généralement désignés par plastique renforcé de fibres de verre (GRP), ni aux métaux rigides.
Le présent document s'applique :
-   aux conduites d'alimentation des installations de distribution à partir des réservoirs, y compris les modes de pression positive, d'aspiration et de siphonage à dépression ;
-   aux tuyauteries de remplissage des réservoirs à partir des camions citernes ;
-   aux tuyauteries de récupération des vapeurs et d’aération (évent) ;
-   aux tuyauteries destinées au confinement secondaire ;
-   aux raccords.
Le présent document ne s'applique pas aux tuyauteries réservées au gaz de pétrole liquéfié (GPL).

Cevovodi iz kovinskih gibljivih cevi in cevi iz plastomerov za podzemne napeljave za bencinske servise

Ta evropski standard določa zahteve za podzemne cevovodne sisteme, ki se uporabljajo za prenos tekočih goriv in njihovih hlapov za bencinske servise. Podane so minimalne zahteve glede zmogljivosti, ki zajemajo primernost za namen, varnost in varstvo okolja. Ta evropski standard se uporablja za cevi iz plastomerov, ki so lahko ojačane do določene mere, in za cevovode iz kovinskih gibljivih cevi. Ne uporablja se za z vlakni ojačane termoreaktivne materiale, ki so običajno imenovani »s steklenimi vlakni ojačani duromerni materiali (GRP)«, ali za toge kovine. Ta dokument se uporablja za: – dostavne cevi, ki vodijo od rezervoarjev do naprav za točenje, vključno z načini pozitivnega tlaka, vakuumskega sesanja in sifona; – polnilne cevi, ki vodijo od cestnih cistern do rezervoarjev; – cevovode za rekuperiranje hlapov in prezračevanje; – cevovode za drugotno zajetje; – spojnike. Ne uporablja se za cevovode za uporabo z utekočinjenim naftnim plinom.

General Information

Status
Published
Publication Date
18-Jun-2013
Current Stage
9093 - Decision to confirm - Review Enquiry
Due Date
02-Dec-2018
Completion Date
12-Feb-2019

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SLOVENSKI STANDARD
SIST EN 14125:2013
01-december-2013
1DGRPHãþD
SIST EN 14125:2005
SIST EN 14125:2005/A1:2007

Cevovodi iz kovinskih gibljivih cevi in cevi iz plastomerov za podzemne napeljave

za bencinske servise

Thermoplastic and flexible metal pipework for underground installation at petrol filling

stations

Thermoplastische und flexible metallene Rohrleitungen für erdverlegte Installationen für

Tankstelle

Tuyauteries enterrées thermoplastiques et en métaux flexibles pour stations-service

Ta slovenski standard je istoveten z: EN 14125:2013
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
83.140.30 Cevi, fitingi in ventili iz Plastics pipes, fittings and
polimernih materialov valves
SIST EN 14125:2013 en,fr,de

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

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SIST EN 14125:2013
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SIST EN 14125:2013
EUROPEAN STANDARD
EN 14125
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2013
ICS 75.200 Supersedes EN 14125:2004
English Version
Thermoplastic and flexible metal pipework for underground
installation at petrol filling stations

Tuyauteries enterrées thermoplastiques et tuyauteries Thermoplastische und flexible metallene Rohrleitungen für

métalliques flexibles pour stations-service erdverlegte Installationen für Tankstellen

This European Standard was approved by CEN on 1 May 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

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

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

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

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

© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14125:2013: E

worldwide for CEN national Members.
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SIST EN 14125:2013
EN 14125:2013 (E)
Contents Page

Foreword ......................................................................................................................................................... 4

Introduction .................................................................................................................................................... 5

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

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

3 Terms and definitions ...................................................................................................................... 8

4 Classes and dimensions .................................................................................................................. 9

4.1 Classes of pipework ......................................................................................................................... 9

4.2 Fittings ............................................................................................................................................... 9

4.3 Dimensional tolerances ................................................................................................................... 9

5 Physical properties ......................................................................................................................... 10

5.1 Pressure ........................................................................................................................................... 10

5.1.1 General ............................................................................................................................................. 10

5.1.2 Hydrostatic pressure ...................................................................................................................... 10

5.1.3 Vacuum ............................................................................................................................................ 10

5.1.4 Cyclic pressure ............................................................................................................................... 11

5.2 Estimated working life .................................................................................................................... 11

5.3 Temperature .................................................................................................................................... 11

5.4 Mechanical tests ............................................................................................................................. 11

5.4.1 Crush test ........................................................................................................................................ 11

5.4.2 Bend radius test .............................................................................................................................. 12

5.4.3 Impact test ....................................................................................................................................... 12

5.4.4 Puncture test ................................................................................................................................... 12

5.4.5 Pull test ............................................................................................................................................ 12

5.5 Fuel tests ......................................................................................................................................... 13

5.5.1 Fuel compatibility ........................................................................................................................... 13

5.5.2 Fuel permeability ............................................................................................................................ 13

5.5.3 Swelling ........................................................................................................................................... 13

5.6 Static electricity .............................................................................................................................. 14

5.6.1 General ............................................................................................................................................. 14

5.6.2 Requirements for insulating plastic pipe systems ...................................................................... 14

5.6.3 Requirements for plastic pipe systems with conductive or dissipative linings ...................... 14

5.7 Weathering ...................................................................................................................................... 14

5.8 Corrosion resistance ...................................................................................................................... 14

5.9 Summary of tests ............................................................................................................................ 15

6 Production control .......................................................................................................................... 15

7 Testing ............................................................................................................................................. 16

7.1 General items referring to the test methods ................................................................................ 16

7.1.1 Selection of test samples from a product range ......................................................................... 16

7.1.2 Number of samples......................................................................................................................... 16

7.1.3 Tests following conditioning ......................................................................................................... 16

7.1.4 Combined tests ............................................................................................................................... 17

7.1.5 Procedure for retesting .................................................................................................................. 17

7.1.6 Test Fuels ........................................................................................................................................ 17

7.2 Test methods ................................................................................................................................... 18

7.2.1 Hydrostatic pressure ...................................................................................................................... 18

7.2.2 Vacuum test ..................................................................................................................................... 18

7.2.3 Cyclic pressure test ........................................................................................................................ 19

7.2.4 Crush test ........................................................................................................................................ 19

7.2.5 Bend radius test .............................................................................................................................. 19

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SIST EN 14125:2013
EN 14125:2013 (E)

7.2.6 Impact test....................................................................................................................................... 20

7.2.7 Puncture resistance ....................................................................................................................... 20

7.2.8 Fuel compatibility test ................................................................................................................... 21

7.2.9 Fuel permeability test .................................................................................................................... 22

7.2.10 Longitudinal swelling ..................................................................................................................... 22

7.2.11 Pull-out test ..................................................................................................................................... 23

7.2.12 Fitting Pull-out test ......................................................................................................................... 23

8 Markings on pipe and fittings ....................................................................................................... 23

9 Manuals ........................................................................................................................................... 24

9.1 Product manual .............................................................................................................................. 24

9.2 Installation manuals ....................................................................................................................... 25

10 Records ........................................................................................................................................... 25

Annex A (informative) A-deviations ........................................................................................................... 26

Annex B (informative) Static Electricity ..................................................................................................... 28

B.1 General ............................................................................................................................................ 28

B.2 Delivering fuels to underground tanks ........................................................................................ 29

B.2.1 Systems with metal pipes .............................................................................................................. 29

B.2.2 Systems with plastic pipes ............................................................................................................ 29

Bibliography ................................................................................................................................................. 32

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SIST EN 14125:2013
EN 14125:2013 (E)
Foreword

This document (EN 14125:2013) has been prepared by Technical Committee CEN/TC 393 “Equipment for

storage tanks and for filling stations”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by December 2013, and conflicting national standards shall

be withdrawn at the latest by December 2013.

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 EN 14125:2004.

Compared with the 2004 edition and the amendment dated 2006 the following fundamental changes are

given:
 new definitions included;
 new types of secondary containment included;
 multilayer pipes included;
 requirements for static electricity revised;
 new test fuels added;
 test procedures revised;
 A-deviation for the Netherlands added.

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

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,

Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France,

Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,

Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
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SIST EN 14125:2013
EN 14125:2013 (E)
Introduction

The purpose of this document is to ensure the suitability of underground pipework for conveying liquid fuels

and their vapours at petrol filling stations.

Pipework should have a designated means of fitting specified by the manufacturer or supplier.

Pipework for underground installation at petrol filling stations generally has a diameter less than 100 mm

and is therefore outside the scope of the Pressure Equipment Directive (PED) 97/23/EC. Pipework with an

internal diameter greater than or equal 100 mm could be within the scope of the PED.

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SIST EN 14125:2013
EN 14125:2013 (E)
1 Scope

This European Standard specifies requirements for underground pipework systems used to transfer liquid

fuels and their vapours at petrol filling stations. Minimum performance requirements covering fitness for

purpose, safety and environmental protection are given.

This European Standard applies to pipework made from thermoplastics, which may include some degree

of reinforcement, and to flexible metal pipework. It does not apply to fibre reinforced thermosets, commonly

referred to as glass fibre reinforced plastic (GRP), nor to rigid metals.
This document applies to:

 delivery pipes from tanks to dispensers, including positive pressure, vacuum suction and siphon

modes;
 fill pipes from road tankers to tanks;
 vapour recovery and vent pipework;
 pipework for secondary containment;
 fittings.
It does not apply to pipework for use with liquefied petroleum gas.
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, 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

EN 12201-1, Plastics piping systems for water supply, and for drainage and sewerage under pressure —

Polyethylene (PE) — Part 1: General

EN 12201-2, Plastics piping systems for water supply, and for drainage and sewerage under pressure —

Polyethylene (PE) — Part 2: Pipes

EN 12201-3, Plastics piping systems for water supply, and for drainage and sewerage under pressure —

Polyethylene (PE) — Part 3: Fittings

EN 12201-4, Plastics piping systems for water supply, and for drainage and sewerage under pressure —

Polyethylene (PE) — Part 4: Valves

EN 12201-5, Plastics piping systems for water supply, and for drainage and sewerage under pressure —

Polyethylene (PE) — Part 5: Fitness for purpose of the system
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SIST EN 14125:2013
EN 14125:2013 (E)

EN 12294, Plastics piping systems — Systems for hot and cold water — Test method for leaktightness

under vacuum

EN 12295, Plastics piping systems — Thermoplastics pipes and associated fittings for hot and cold

water — Test method for resistance of joints to pressure cycling
EN 13160-1, Leak detection systems — Part 1: General principles
EN 13160-2, Leak detection systems — Part 2: Pressure and vacuum systems

EN 13160-7, Leak detection systems — Part 7: General requirements and test methods for interstitial

spaces, leak protecting linings and leak protecting jackets

EN 13463-1, Non-electrical equipment for use potentially explosive atmospheres — Part 1: Basic method

and requirements

EN 14214, Liquid petroleum products — Fatty acid methyl esters (FAME) for use in diesel engines and

heating applications — Requirements and test methods

EN 15376, Automotive fuels — Ethanol as a blending component for petrol — Requirements and test

methods

EN 28510-1, Adhesives — Peel test for a flexible-bonded-to-rigid test specimen assembly — Part 1: 90°

peel (ISO 8510-1)

EN ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids —

Determination of the resistance to internal pressure — Part 1: General method (ISO 1167-1)

EN ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids —

Determination of the resistance to internal pressure — Part 2: Preparation of pipe test pieces (ISO 1167-2)

EN ISO 1167-3, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids —

Determination of the resistance to internal pressure — Part 3: Preparation of components (ISO 1167-3)

EN ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids —

Determination of the resistance to internal pressure — Part 4: Preparation of assemblies (ISO 1167-4)

EN ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc

sources (ISO 4892-2:2013)

EN ISO 8510-2, Adhesives — Peel test for a flexible-bonded-to-rigid test specimen assembly — Part 2:

180 degree peel (ISO 8510-2)

EN ISO 11306, Corrosion of metals and alloys — Guidelines for exposing and evaluating metals and alloys

in surface sea water (ISO 11306)

EN ISO 11339, Adhesives — T-peel test for flexible-to-flexible bonded assemblies (ISO 11339)

EN ISO 16871, Plastics piping and ducting systems — Plastics pipes and fittings — Method for exposure

to direct (natural) weathering (ISO 16871)

ISO 11922-1, Thermoplastics pipes for the conveyance of fluids — Dimensions and tolerances — Part 1:

Metric series
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SIST EN 14125:2013
EN 14125:2013 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
pipework system
pipes and fittings used to convey or retain liquid fuels and their vapours
3.2
fittings

in-line connector, elbow, reducer, tee or cap, or flange or other component supplied to connect one pipe to

another or pipework to equipment
3.3
flexible pipe

pipe that can be bent by hand to any radius above a set minimum without any change in performance

3.4
primary delivery pipework
pipework designed to convey liquid fuels by positive pressure or vacuum suction
3.5
fill pipework

pipework designed to convey liquid fuels from a delivery tanker to an underground storage tank by gravity

discharge
3.6
multilayer pipe
pipe where more than one identified layer is present
3.7
vent pipework
pipework designed to convey vapour from a storage tank to the atmosphere
3.8
vapour recovery pipework
pipework designed to convey vapour (or condensate) to or from a storage tank
3.9
liquid fuel

commercially available petrol and diesel fuel comprising biofuels and biofuels blends

3.10
leakage containment

system which is designed to prevent leakage from a primary system entering the environment and which

enables the detection of leakage
3.11
secondary containment
system which is designed to achieve leakage containment
3.12
design pressure

maximum effective pressure of the fluid in the piping system, expressed in bar, which is allowed in

continuous use
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SIST EN 14125:2013
EN 14125:2013 (E)
4 Classes and dimensions
4.1 Classes of pipework

Pipes for underground fuel distribution shall conform to one of the following two classes:

 Class 1 — Double wall pipework capable of containing and facilitating the detection of leakage from a

primary delivery pipe.
 Class 2 — Single wall pipework.

The primary pipe of Class 1, and pipes of Class 2, shall conform to one of Types A or B. The secondary

pipe of Class 1 shall conform to one of Types C1 or C2.
a) Type A. Plastic systems.

Pipes shall be principally made of thermoplastic polymers, with some metal or fibre reinforcement optional.

b) Type B. Flexible metal systems.
Pipes shall comprise a fluid tight primary pipe made of a metal.
c) Type C. Secondary containment.

1) Type CS. System with continuous 360° separation between the primary containment and

secondary containment.

i) Type CS1: A pipe system designed to contain any leakage from the primary pipe. The

system is at atmospheric pressure.

ii) Type CS2: A pipe system designed to contain any leakage from the primary pipe. The system is

designed to conform to the performance criteria of Class I leak detection systems in accordance

with EN 13160-1, EN 13160-2 and EN 13160-7.

2) Type CP: System without continuous 360° separation between the primary containment and

secondary containment.

i) Type CP1: A pipe system designed to contain leakage from the primary pipe. The system is

at atmospheric pressure.

ii) Type CP2: A pipe system designed to contain leakage from the primary pipe. The system is

designed to conform to the performance criteria of Class I leak detection systems in accordance

with EN 13160-1, EN 13160-2 and EN 13160-7.
4.2 Fittings

All pipework shall include fittings to provide leak-tight attachment to other systems, terminations, branches

and changes of direction.
4.3 Dimensional tolerances

The external diameter and wall thickness shall be stated by the manufacturer. For plastic pipework the

tolerance on the external diameter shall be in accordance with ISO 11922-1, Grade B, and the out-of-

roundness shall be in accordance with ISO 11922-1, Grade N.
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SIST EN 14125:2013
EN 14125:2013 (E)
5 Physical properties
5.1 Pressure
5.1.1 General

Operating and test pressures shall be in accordance with Table 1 according to the application.

All pressures in Table 1 are gauge pressures.
Table 1 — Operating and test pressures for pipework
Application Operating Test Lower test Higher test
pressure vacuum pressure pressure
bar bar bar bar
Primary delivery pipework: positive +3,5 —
+5,0 ± 0,1
pressure
Primary delivery pipework: vacuum -0,6 -0,9 ± 0,05 +5,0 ± 0,1
+30,0 ± 1,0
suction including siphons
Vents and vapour recovery pipework 1,0 -0,9 ± 0,05 +5,0 ± 0,1
Fill pipework 1,0 — +5,0 ± 0,1
Secondary containment Type CP1 +0,5 — +1,0 ± 0,02 +5,0 ± 0,1
and CS1
Secondary containment Type CP2 -0,5 to +4,5 -0,6 ± 0,05 +5,0 ± 0,1 +10 ± 0,2
and CS2
5.1.2 Hydrostatic pressure
This requirement applies to all pipes and fittings.

When tested in accordance with 7.2.1.1, all pipes and fittings, sampled in accordance with 7.1.2 and

connected together as one or more assemblies, shall:

 withstand the lower test pressure in Table 1 for no less than 5 min with no signs of leakage.

When tested in accordance with 7.2.1.2, all pipes and fittings, sampled in accordance with 7.1.2 and

connected together as one or more assemblies, shall:

 withstand the lower test pressure in Table 1 for no less than 5 min with no signs of leakage;

 withstand the higher test pressure in Table 1 for no less than 1 min with no signs of leakage.

5.1.3 Vacuum

This requirement applies to all pipes and fittings intended for vacuum suction, including siphons, vent and

vapour recovery and secondary containment, Type CP2 and CS2.

When tested in accordance with 7.2.2, all pipes and fittings, sampled in accordance with 7.1.2, shall:

 withstand the vacuum specified in Table 1 for no less than 30 min. The loss of vacuum shall not

exceed 0,05 bar and there shall be no signs of collapse.
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SIST EN 14125:2013
EN 14125:2013 (E)
5.1.4 Cyclic pressure

This requirement applies to pipes and fittings for all applications except secondary containment.

When tested in accordance with 7.2.3, a sample of pipes and fittings selected in accordance with 7.1.1 and

7.1.2 shall withstand the test conditions without leakage.
5.2 Estimated working life

Design plans shall be available for all pipework which demonstrate that the pipework is designed to have

an estimated working life of at least 30 years.

NOTE The pressure design of polymeric pipes where only one layer contributes to the pressure rating of the pipe

will be designed through a regression curve generated in accordance with EN ISO 9080. In the case of a polymeric

multilayer pipe construction, where more than one layers contribute to the pressure rating of the pipe, the stress base

design can be measured (procedure II) or calculated (procedure I) as defined in ISO 17456.

When tested in accordance with EN ISO 1167-1 to EN ISO 1167-4, pipes, fittings and assemblies shall not

leak under the following test conditions:

a) a 1 h hydrostatic pressure test, at (20 ± 2) °C, at 1,5 times the design pressure P , or at 9 bar for

primary pipe and 3 bar for secondary containment Type CP2 and CS2 piping , whichever is the

greater;

b) a 1 000 h hydrostatic pressure test, at (80 ± 2) °C, at 0,8 times the design pressure P , or at 5 bar for

primary piping and 2,6 bar for secondary containment Type CP2 and CS2 piping, whichever is the

greater.
5.3 Temperature
There shall be two temperature classes:

Temperature Class T1: Underground pipework shall be fully operational between –40 °C and +50 °C.

Temperature Class T2: Underground pipework shall be fully operational between –20 °C and +50 °C, but

suitable for transport and storage at –40 °C and +50 °C.

Pipework that passes the tests in 7.2.1.1, 7.2.5.3, 7.2.6 and 7.2.7.3 at the appropriate temperature shall be

deemed to conform this requirement.
5.4 Mechanical tests
5.4.1 Crush test
This requirement applies to all pipes and fittings.

When tested in accordance with 7.2.4, a sample of pipes and fittings selected in accordance with 7.1.1 and

7.1.2 shall:

 recover to not less than 90 % of their original diameter within 5 min of the load being removed;

 show no visible sign of leakage or cracking;

 when tested in accordance with 7.1.3 show no signs of leakage and, where vacuum testing is

specified, show no signs of collapse.
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SIST EN 14125:2013
EN 14125:2013 (E)
5.4.2 Bend radius test
This requirement applies to all pipes and in-line connectors.

When tested in accordance with 7.2.5, a sample of pipes and straight connectors selected in accordance

with 7.1.1 and 7.1.2 shall:
 show no visible sign of leakage or cracking;
 when tested in accordance with 7.1
...

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