SIST EN 14125:2013

SLOVENSKI STANDARD
oSIST prEN 14125:2012
01-januar-2012
Cevovodi iz kovinskih gibkih cevi in cevi iz plastomerov za podzemne napeljave na
bencinskih servisih
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: prEN 14125 rev
ICS:
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
oSIST prEN 14125:2012 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 14125:2012

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oSIST prEN 14125:2012


EUROPEAN STANDARD
DRAFT
prEN 14125 rev
NORME EUROPÉENNE

EUROPÄISCHE NORM

September 2011
ICS 75.200 Will supersede EN 14125:2004
English Version
Thermoplastic and flexible metal pipework for underground
installation at petrol filling stations
Tuyauteries enterrées thermoplastiques et en métaux Thermoplastische und flexible metallene Rohrleitungen für
flexibles pour stations-service erdverlegte Installationen für Tankstelle
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 393.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

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

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14125 rev:2011: E
worldwide for CEN national Members.

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oSIST prEN 14125:2012
prEN 14125:2011 (E)
Contents
Page
Foreword .3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Classes and dimensions .7
4.1 Classes of pipework .7
4.2 Connectors .8
4.3 Dimensional tolerances .8
5 Physical properties .8
5.1 Pressure .8
5.2 Estimated working life .9
5.3 Temperature . 10
5.4 Mechanical tests . 10
5.5 Fuel tests . 11
5.6 Static electricity . 12
5.7 Weathering . 13
5.8 Corrosion resistance . 13
5.9 Summary of tests . 13
6 Production control . 14
7 Testing . 14
7.1 General items referring to the test methods . 14
7.2 Test methods . 16
8 Markings on pipe and connectors . 22
9 M anuals . 23
9.1 Product manual . 23
9.2 Installation manuals . 23
10 Records . 24
Annex A (informative) System of evaluation of conformity . 25
A.1 General . 25
A.2 Evaluation and conformity . 25
Annex B (informative) A–deviations . 29
Annex C (informative) Static Electricity . 31
C.1 General . 31
C.2 Requirements to prevent excessive electrostatic charge build up on the pipe walls, valves
and couplings . 31
Bibliography . 33
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oSIST prEN 14125:2012
prEN 14125:2011 (E)
Foreword
This document (prEN 14125:2011) 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 document is currently submitted to the CEN enquiry.
This document will supersede EN 14125:2004 and EN 14125:2004/A1:2006.
According to edition 2004 and amendment edition 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.

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oSIST prEN 14125:2012
prEN 14125:2011 (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.
NOTE Pipework should have a designated means of connector 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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1 Scope
This document 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 document 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;
 connectors.
It does not apply to pipework for use with liquefied petroleum gas.
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.
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 — 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
EN 12294, Plastics piping systems — Systems for hot and cold water — Test method for leaktightness under
vacuum
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oSIST prEN 14125:2012
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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 13463-1:2001, Non-electrical equipment for potentially explosive atmospheres — Part 1: Basic method
and requirements
EN 600243-2, Electrical strength of insulating materials — Test methods — Part 2: Additional requirements for
tests using direct voltage
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 1167-1:2006)
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 1167-2:2006)
prEN 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/DIS 1167-3:2005)
prEN 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/DIS 1167-4:2006)
EN ISO 4892-2, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc sources
(ISO 4892-2:1994)
EN ISO 11306, Corrosion of metals and alloys — Guidelines for exposing and evaluating metals and alloys in
surface sea water (ISO 11306:1998)
EN ISO 16871, Plastics piping and ducting systems — Plastics pipes and fittings — Method for exposure to
direct (natural) weathering (ISO 16871:2003)
CLC/TR 50404/Corrigendum, Electrostatics — Code of practice for the avoidance of hazards due to static
electricity
ISO 8510-1, Adhesives — Peel test for a flexible-bonded-to-rigid test specimen assembly — Part 1: 90 degree
peel
ISO 8510-2, Adhesives — Peel test for a flexible-bonded-to-rigid test specimen assembly — Part 2:
180 degree peel
ISO 11339, Adhesives — T-peel test for flexible-to-flexible bonded assemblies
ISO 11922-1, Thermoplastics pipes for the conveyance of fluids — Dimensions and tolerances — Part 1:
Metric series
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
pipework system
pipes and connectors used to convey or retain liquid fuels and their vapours
3.2
connector
coupler, elbow, reducer, tee or cap, or flange or other component supplied to connect one pipe to another or
pipework to equipment
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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
full secondary containment
system in which the outer secondary is separated continuously from the primary by an interstitial space consisting
of an annulus between the primary and the secondary pipes and fittings over the whole length of the system,
designed so as to prevent leakage of fuel from the primary system entering the environment
3.11
partial secondary containment
system in which the outer secondary is not separated fully from the primary by an interstitial space having a
360° annulus, designed so as to prevent leakage of fuel from the primary system entering the environment
3.12
design pressure (P )
d
maximum effective pressure of the fluid in the piping system, expressed in bar, which is allowed in continuous
use
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.
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Type A. Plastic systems.
Pipes shall be principally made of thermoplastic polymers, with some metal or fibre reinforcement optional.
Type B. Flexible metal systems.
Pipes shall comprise a fluid tight primary pipe made of a metal.
Type C. Secondary containment.
Type S. Secondary Containment system with continuous 360° separation between the Primary Containment
and Secondary Containment.
Type I: Integral Primary/Secondary system without continuous 360° separation between the
Primary Containment and Secondary Containment.
Type C1: A pipe system designed to contain any leakage from the primary pipe. The system is at atmospheric
pressure.
Type C2: 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.
4.2 Connectors
All pipework shall include connectors 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 tolerance on
the out-of-roundness shall be in accordance with ISO 11922-1, Grade N.
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 pressure +3,5 — +5,0 ± 0,1
Primary delivery pipework: vacuum suction -0,6 -0,9 ± 0,05 +5,0 ± 0,1
including siphons
+30,0 ± 1,0
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 C1 +0,5 — +1,0 ± 0,02 +5,0 ± 0,1
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Secondary Containment Type C2 -0,5 to +4,5 -0,6 ± 0,05 +5,0 ± 0,1 +10 ± 0,2

5.1.2 Hydrostatic pressure
This requirement applies to all pipes and connectors.
When tested in accordance with 7.2.1.1, all pipes and connectors, 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 connectors, 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 connectors intended for vacuum suction, including siphons, vent and
vapour recovery and Secondary Containment, Type C2.
When tested in accordance with 7.2.2, all pipes and connectors, 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.
5.1.4 Cyclic pressure
This requirement applies to pipes and connectors for all applications except Secondary Containment.
When tested in accordance with 7.2.3, a sample of pipes and connectors 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 parts 1 to 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
d
pipe and 3 bar for Secondary Containment Type C2 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
d
primary piping and 2,6 bar for Secondary Containment Type C2 piping, whichever is the greater.
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5.3 Temperature
There shall be two temperature classes:
Class T1: Underground pipework shall be fully operational between –40 °C and +50 °C.
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 connectors.
When tested in accordance with 7.2.4, a sample of pipes and connectors 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.
5.4.2 Bend radius test
This requirement applies to all pipes and straight 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 7.1.3 show no signs of leakage and, where vacuum testing is specified,
show no signs of collapse.
The sample of pipes chosen in accordance with 7.1.1 shall include that pipe diameter for which the bending strain
is greatest. The bending strain is equal to d/2R, where d is the outer diameter of the pipe and R the bending
radius specified by the manufacturer.
5.4.3 Impact test
This requirement applies to all pipes and connectors.
When tested in accordance with 7.2.6, a sample of pipes and connectors selected in accordance with 7.1.1
and 7.1.2 shall:
 show no visible sign of leakage or cracking; in Type B pipes there shall be no through-thickness damage
to any protective coating;
 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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5.4.4 Puncture test
This requirement applies to all pipes.
When tested in accordance with 7.2.7, a sample of pipes 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 7.1.3 show no signs of leakage and, where vacuum testing is specified,
show no signs of collapse.
5.4.5 Pull test
This requirement applies to all pipes and straight connectors intended for positive pressure and vacuum
suction applications.
When tested in accordance with 7.2.11, a sample of pipes and straight connectors selected in accordance
with 7.1.1 and 7.1.2 and connected to pipes to form assemblies, shall:
 show no visible sign of slippage;
 when tested in accordance with 7.1.3 show no signs of leakage and, where vacuum testing is specified,
show no signs of collapse.
The samples of pipes and connectors chosen in accordance with 7.1.1 shall include those with the lowest
diameter and those with the lowest diameter > 63 mm.
5.5 Fuel tests
5.5.1 Fuel compatibility
This requirement applies to all pipes and connectors.
When tested in accordance with 7.2.8, a sample of pipes and connectors selected in accordance with 7.1.1
and 7.1.2 shall:
 show no signs of damage or swelling, for example of seals, which could impair correct functioning of the
pipework;
 when tested in accordance with 7.1.3 show no signs of leakage and, where vacuum testing is specified,
show no signs of collapse;
 pipes with a multi-layer construction where the layers are all flexible, shall be subjected to peel test in
accordance with 7.2.8.2.1;
 pipes with a multi-layer construction where the layers are flexible-rigid shall be subjected to peel test in
accordance with 7.2.8.2.
 In each case the mean peel strength shall be a minimum of 15 N/cm and the ratio of the mean peel
strength to the unexposed samples shall be not less than 0,8.
5.5.2 Fuel permeability
This requirement applies to all pipes of Types A, C1 and C2. Permeability classes are defined in accordance
with the maximum level of permeability as stated in Table 2.
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Table 2 — Maximum fuel permeability of underground pipes
Application Fuel Maximum fuel
permeability permeability

-2 -1 -2 -1
g⋅⋅⋅⋅m ⋅⋅⋅⋅d g⋅⋅⋅⋅m ⋅⋅⋅⋅d
+0,2
Primary delivery pipework: positive —
0
0
pressure and vacuum suction
including siphons
Vents and vapour recovery pipework — 2,0
Fill pipework — 2,0
Secondary Containment — 24,0

When tested in accordance with 7.2.9 a sample of pipes selected in accordance with 7.1.1 and 7.1.2 shall
conform to the values given in Table 2 for Test Fuel 1 and Test Fuel 2 (see 7.1.6), in accordance with the
application or permeability class. The sample of pipes chosen in accordance with 7.1.1 shall include the pipe
with the lowest diameter.
5.5.3 Swelling
For pipes intended for positive pressure and vacuum suction delivery, the swelling when tested in accordance
with 7.2.10 using Test Fuel 2 shall not exceed 0,2 %.
5.6 Static electricity
5.6.1 General
Ignition hazards by static electricity caused by fuel pipe systems shall be avoided. In 5.6.2 to 5.6.3
corresponding requirements for the various pipe types are stated.
Classification of pipes:
The following boundary limits are used for classifying the resistance of pipes and hoses into the categories
given as follows:
3 -1
Conductive: resistance per unit length < 10 Ω m
3 -1 6 -1
Dissipative 10 Ω m ≤ resistance per unit length ≤ 10 Ω m
6 -1
Insulating: resistance per unit length > 10 Ω m
NOTE The resistance per unit length should include the lumped effects of couplings and fittings.
More information about electrostatic hazards can be found in CLC/TR 50404 and EN 13463-1.
5.6.2 Requirements for insulating plastic pipe systems
To avoid pin holing insulating plastic pipe should have an electrical breakthrough strength across the pipe
exceeding 100 kV, measured in accordance with IEC 60243-2. A polyethylene layer of at least 4 mm in
thickness usually exceeds this breakthrough strength.
5.6.3 Requirements for plastic pipe systems with conductive or dissipative linings
The conductive liners or conductive layers shall encircle the whole pipe profile.
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5.7 Weathering
Three assemblies consisting of two sections of pipe of minimum length 375 mm and joined by a straight
-2
connector shall be preconditioned in accordance to a cumulative solar radiation of > 3,5 GJ⋅m using natural
weathering in accordance with EN ISO 16871 or artificial weathering by a method that conforms to
EN ISO 4892-2. After exposure the assembly shall show no visible signs of cracking when tested in
accordance with 7.2.6. If black HDPE material approved to EN 1555-1 to EN 1555-5 and EN 12201-1 to
EN 12201-5 is used, this requirement can be considered as fulfilled.
5.8 Corrosion resistance
All metallic parts that are designe
...