SIST EN 14125:2005
(Main)Thermoplastic and flexible metal pipework for underground installation at petrol filling stations
Thermoplastic and flexible metal pipework for underground installation at petrol filling stations
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.
Thermoplastische und flexible metallene Rohrleitungen für erdverlegte Installationen für Tankstelle
Tuyauteries enterrées thermoplastiques et tuyauteries métalliques flexibles pour stations-service
Le présent document spécifie les exigences relatives aux installations 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 a l'emploi, la sécurité et la protection de l'environnement.
Le présent document s'applique aux tuyauteries en matériaux thermoplastiques pouvant comporter certains renforts, ainsi qu'aux tuyauteries métalliques flexibles. Elle ne s'applique ni aux matériaux thermodurcissables renforcés par des fibres, généralement désignés par plastique renforcé a la fibre de verre (GRP), ni aux métaux rigides.
Le présent document s'applique :
- aux conduites d'alimentation des installations de distribution a partir des réservoirs, y compris les modes de pression positive, l'aspiration et de siphonnage a dépression ;
- aux tubes de remplissage des réservoirs a partir des camions-citernes ;
- a la récupération des vapeurs et aux tuyauteries d'aération (évent) ;
- aux tuyauteries destinées au confinement secondaire ;
- aux raccords.
Elle 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
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cevovodi iz kovinskih gibljivih cevi in cevi iz plastomerov za podzemne napeljave za bencinske serviseThermoplastische und flexible metallene Rohrleitungen für erdverlegte Installationen für TankstelleTuyauteries enterrées thermoplastiques et tuyauteries métalliques flexibles pour stations-serviceThermoplastic and flexible metal pipework for underground installation at petrol filling stations83.140.30Cevi, fitingi in ventili iz polimernih materialovPlastics pipes, fittings and valves75.200Petroleum products and natural gas handling equipment23.040.10Železne in jeklene ceviIron and steel pipesICS:Ta slovenski standard je istoveten z:EN 14125:2004SIST EN 14125:2005en,fr,de01-marec-2005SIST EN 14125:2005SLOVENSKI
STANDARD
SIST EN 14125:2005
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14125December 2004ICS 75.200English versionThermoplastic and flexible metal pipework for undergroundinstallation at petrol filling stationsTuyauteries enterrées thermoplastiques et en métauxflexibles pour stations-serviceThermoplastische und flexible metallene Rohrleitungen fürerdverlegte Installationen für TankstelleThis European Standard was approved by CEN on 15 November 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14125:2004: ESIST EN 14125:2005
EN 14125:2004 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.6 4 Classes and dimensions.7 5 Physical properties.8 6 Production control.13 7 Testing.13 8 Markings on pipe and connectors.20 9 Manuals.21 10 Records.22 Annex A (informative)
System of evaluation of conformity.23 Annex B (informative)
A–deviations.27 Bibliography.28
SIST EN 14125:2005
EN 14125:2004 (E) 3 Foreword This document (EN 14125:2004) has been prepared by Technical Committee CEN/TC 221 “Shop fabricated metallic tanks and equipment for storage tanks and for service 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 June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 14125:2005
EN 14125:2004 (E) 4 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. SIST EN 14125:2005
EN 14125:2004 (E) 5 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 2243-2, Aerospace series – Structural adhesives – Test methods – Part 2: Peel metal-metal EN 13463-1:2001, Non-electrical equipment for potentially explosive atmospheres – Part 1: Basic method and requirements EN 60243–2, Electric strength of insulating materials – Test methods -
Part 2: Additional requirements for tests using direct voltage (IEC 60243-2:2001) 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 seawater (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, Electrostatics – Code of practice for the avoidance of hazards due to static electricity IEC 60093, Methods of test for volume resistivity and surface resistivity of solid electrical insulating materials
ISO 3458, Assembled joints between fittings and polyethylene (PE) pressure pipes – Test of leakproofness under internal pressure ISO 6259-3, Thermoplastics pipes – Determination of tensile properties – Part 3: Polyolefin pipes SIST EN 14125:2005
EN 14125:2004 (E) 6 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 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 vent pipework pipework designed to convey vapour from a storage tank to the atmosphere 3.7 vapour recovery pipework pipework designed to convey vapour (or condensate) to or from a storage tank 3.8 liquid fuel commercially available petrol and diesel fuel comprising a complex mixture of volatile hydrocarbon compounds in the C4 to C12 range 3.9 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 3.10 design pressure (Pd) maximum effective pressure of the fluid in the piping system, expressed in bar, which is allowed in continuous use SIST EN 14125:2005
EN 14125:2004 (E) 7 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. 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 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 meet the performance criteria of Class I leak detection systems according to 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 according to ISO 11922-1, Grade B, and the tolerance on the out-of-roundness shall be according to ISO 11922-1, Grade N. SIST EN 14125:2005
EN 14125:2004 (E) 8 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 pressure bar Test vacuum bar Lower test pressure bar Higher test pressure bar Primary delivery pipework: positive pressure +3,5 – +5,0 ± 0,1
Primary delivery pipework: vacuum suction including siphons -0,6 -0,9 ± 0,05 +5,0 ± 0,1 Vents and vapour recovery pipework 1,0 -0,9 ± 0,05 +5,0 ± 0,1 Fill pipework 1,0 – +5,0 ± 0,1 +30,0 ± 1,0 Secondary containment Type C1 +0,5 – +1,0 ± 0,02 +5,0 ± 0,1 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 according to 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 according to 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 according to 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. SIST EN 14125:2005
EN 14125:2004 (E) 9
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 according to 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 multilayer, polymeric pipes can be calculated from stress base design, of each layer which contributes to the pressure rating. In this case a regression curve may be generated for each polymeric material according to EN ISO 9080.
Alternative methods may be applied, where the pressure design of the pipes is linked to the construction itself. When tested in accordance with ISO 3458, 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 Pd, or at 9 bar for primary pipe and 3 bar for secondary containment piping , whichever is the greater. b) a 1 000 h hydrostatic pressure test, at (80 ± 2) °C, at 1,3 times the design pressure Pd, or at 8 bar for primary piping and 2,6 bar for secondary containment piping, whichever is the greater. 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 satisfy 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 according to 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 according to 7.1.3 show no signs of leakage and, where vacuum testing is specified, show no signs of collapse. SIST EN 14125:2005
EN 14125:2004 (E) 10
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 according to 7.1.1 and 7.1.2 shall: show no visible sign of leakage or cracking; when tested according to 7.1.3 show no signs of leakage and, where vacuum testing is specified, show no signs of collapse. The sample of pipes chosen according to 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 according to 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 according to 7.1.3 show no signs of leakage and, where vacuum testing is specified, show no signs of collapse. 5.4.4 Puncture test This requirement applies to all pipes. When tested in accordance with 7.2.7, a sample of pipes selected according to 7.1.1 and 7.1.2 shall: show no visible sign of leakage or cracking; when tested according to 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 according to 7.1.1 and 7.1.2 and connected to pipes to form assemblies, shall: show no visible sign of slippage; when tested according to 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 according to 7.1.1 shall include those with the lowest diameter and those with the lowest diameter >63 mm. SIST EN 14125:2005
EN 14125:2004 (E) 11 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 according to 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 according to 7.1.3 show no signs of leakage and, where vacuum testing is specified, show no signs of collapse; for pipes with a multi-layer construction where the layers consist of materials of similar modulus tested to 7.2.8.2, show no signs of detachment of the barrier layer from the pipe wall; for pipes with a multi-layer construction where the layers consist of materials of different modulus tested to 7.2.8.3, the ratio of the mean peel strength of the exposed samples to that of 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 according to the maximum level of permeability as stated in Table 2. Table 2 — Maximum fuel permeability of underground pipes Application Fuel permeability g⋅⋅⋅⋅m-2⋅⋅⋅⋅d-1 Maximum fuel permeability g⋅⋅⋅⋅m-2⋅⋅⋅⋅d-1 Primary delivery pipework: positive pressure and vacuum suction including siphons 2,000+ – 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 according to 7.1.1 and 7.1.2 shall fulfil the values given in Table 2 for Test Fuel 1 and Test Fuel 2 (see 7.1.6), according to the application or permeability class. The sample of pipes chosen according to 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 according to 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 5.6.4 corresponding requirements for the various pipe types are stated. SIST EN 14125:2005
EN 14125:2004 (E) 12 NOTE More information about electrostatic hazards can be found in CLC/TR 50404 and EN 13463-1. 5.6.2 Requirements for conductive pipes and insulating pipe systems having conductive liners or conductive layers embedded in the wall
The conductive liners or conductive layers shall encircle the whole pipe profile. All conductive parts with a capacitance between part and earth greater than 10 pF shall be adequately bonded to earth. In the case of wires of electric welding sockets it is sufficient to close their sockets with plastic caps. 5.6.3 Requirements for dissipative pipes and insulating pipe systems having dissipative liners The volume resistivity of any pipe or liner that is stated to be dissipative or conductive shall be measured according to IEC 60093. The volume resistivity shall be less than 1011 Ω⋅m. Alternatively the surface resistivity of the inside of the pipe may be measured according to IEC 60093. In this case the surface resistivity shall be less than 1010 Ω. 5.6.4 Additional requirements for all other insulating pipe systems When tested according to EN 60243-2 the dielectric strength of the pipe shall be at least 100 kV. Where the pipe wall includes a layer of pore-free polyethylene at least 4 mm thick this requirement shall be taken as satisfied. 5.7 Weathering Three assemblies consisting of two sections of pipe of minimum length 375 mm and joined by a straight connector shall be preconditioned in accordance to a cumulative solar radiation of > 3,5 GJ⋅m-2 using natural weathering according to 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 according to 7.2.6. 5.8 Corrosion resistance All metallic parts that are designed to be directly buried in the ground shall be tested according to EN ISO 11306 by exposure to water and surface seawater to establish the effectiveness of corrosion resistance for an expected life period of 30 years. In addition an assessment shall be made to ensure that adequate external corrosion resistance exists in respect to damage caused by stray electrical currents for the same period of time. The coating of the pipework shall be tested for integrity and holidays with 5 kV⋅mm-1 thickness of the coating, but with not more than 20 kV. NOTE For cathodic protection see EN 13636. 5.9 Summary of tests Testing of requirements 5.1 to 5.7 shall be carried out in accordance with Table 3 according to the type. SIST EN 14125:2005
EN 14125:2004 (E) 13 Table 3 —Tests survey Test Clause Applies to Type AType B Type C1 Type C2Hydrostatic pressure 7.2.1 pipes and connectors to pressures in Table 1 yes yes yes yes Vacuum 7.2.2 pipes and connectors for vacuum suction applications yes yes no yes Static electricity 5.6 pipes and connectors yes yes yes yes Weathering 5.7 pipes and straight connectors yes yes yes yes Cyclic pressure 7.2.3 pipes and connectors for positive pressure applications yes yes no no Crush 7.2.4 pipes and connectors yes yes yes yes Bend radius 7.2.5 pipes and straight connectors yes yes yes yes Impact 7.2.6 pipes and connectors yes yes yes yes Puncture 7.2.7 pipes only yes yes yes yes Fuel compatibility 7.2.8 pipes and connectors yes yes yes yes Fuel permeability Swelling 7.2.9 7.2.10 pipes only yes no yes yes Pull-out 7.2.11 pipes and straight connectors for positive pressure and vacuum suction yes yes no no 6 Production control A factory production control scheme shall be established and documented in a manual prior to a new product type being placed on the market. Subsequently, any fundamental changes in raw materials and additives, manufacturing procedures or the control scheme that affects the properties or use of a product shall be recorded in the manual. The manual shall include the factory production control procedures relevant to the declared properties, as confirmed by the initial type tests. The factory production control procedures shall consist of a system for the permanent internal control of the production of the products to ensure that such products subsequently placed on the market conform to this document and that the measured values conform to the declared values. The system of evaluation of conformity should be in accordance with Annex A. The manufacturer shall specify a batch or lot number which shall be marked on the product. 7 Testing 7.1 General items referring to the test methods 7.1.1 Selection of test samples from a product range Hydrostatic testing to 7.2.1 and, for vacuum suction applications, vacuum testing to 7.2.2, shall be applied to all sizes and types of pipe and connector. Where a product with a range of sizes consisting of identical materials and similar design is under test, construct a programme for the remaining tests in which each test is applied to a minimum of two sizes of pipe and connector. SIST EN 14125:2005
EN 14125:2004 (E) 14 7.1.2 Number of samples Three samples shall be used for each test. Unless otherwise specified the samples shall be assemblies consisting of lengths of pipe, one of which shall have a minimum free length of 375 mm or three times the external diameter, whichever is the greater, together with examples of the connectors as appropriate. Fit connectors in accordance with the manufacturer’s instructions. 7.1.3 Tests following conditioning The requirement for hydrostatic pressure testing (5,0 bar or 1,5 bar) or vacuum testing (-0,9 bar) after a conditioning test (7.2.4 to 7.2.11) depends on the application, as detailed in Table 4. Where such testing is required, fit the samples with an end seal at one end and with a pressure connector at the other. These connectors may be fitted before or after the conditioning test. After the conditioning test proceed as follows. If vacuum testing is required, condition the samples in at a temperature of (23 ± 2) °C for not less than 16 h. Then apply to each sample an internal pressure of (-0,9 ± 0,05) bar [(0,1 ± 0,05) bar absolute]. Isolate the sample from the vacuum pump and maintain for 5 min at a temperature of (23
± 2) °C. During this period there shall be no loss of vacuum. Inspect the exterior and, after disassembly, the interior of the sample for signs of leakage or collapse. If hydrostatic pressure testing is required, fill the samples with water and keep them in an environment maintained at a constant temperature of (23 ± 2) °C for a minimum of 1 h. Apply an internal pressure as defined in Table 4 at the same temperature. Inspect the samples for leaks. Table 4 — Hydrostatic test pressure after conditioning Application Test pressure a bar Duration min Primary delivery - positive pressure Fill, vent, and vapour recovery (5,0 ± 0,1) (-0,9 ± 0,05) 5 Secondary containment Type C2 (5,0 ± 0,1) 5 Secondary containment Type C1 (1,5 ± 0,03) 5 a All pressures are gauge pressures.
7.1.4 Combined tests For the sake of efficiency conditioning tests may be combined. For example, the samples may be subjected to the crush, impact and puncture tests according to 7.2.4, 7.2.6 and 7.2.7 respectively before being tested according to 7.1.3. However, if they then fail the test according to 7.1.3 they shall be deemed to have failed all three conditioning tests, unless they can be shown to have passed one or another of the tests separately. 7.1.5 Procedure for retesting Where one or more failures are noted, the retest protocol in Table 5 shall be adopted. Table 5 — Retest protocol Number of failures Action 0 Product passes the test 1 Retest with 3 new samples If any one of the new samples fails, the product fails the test 2 or 3 Product fails the test SIST EN 14125:2005
EN 14125:2004 (E) 15
7.1.6 Test Fuels The test fuels shall be: Test Fuel 1: 41,5 % toluene
41,5 % iso-octane
15 % methanol
2,0% iso-butyl alcohol Test Fuel 2: 41,5 % toluene
41,5 % iso-octane 17,0 % methyl tertiary butyl ether (MTBE) 7.2 Test methods 7.2.1 Hydrostatic pressure 7.2.1.1 50 °C test This test is applicable to all pipes and connectors (connected together as one or more assemblies). At least one section of pipe of each diameter shall have a free length of 375 mm. Fill each assembly with water and place it in a water environment held at a constant temperature of
(50,0 ± 2,0) °C for a minimum of 1 h. Increase the internal pressure at a steady rate to the lower test pressure specified in Table 1 for the application concerned, over a period of between 30 s and 120 s. Hold the lower test pressure for not less than 5 min. Check for leakage. 7.2.1.2 23 °C test This test is applicable to all pipes and connectors (connected together as one or more assemblies). At least one section of pipe of each diameter shall have a free length of 375 mm. Fill each assembly with water and place it in an air or liquid environment held at a constant temperature of
(23 ± 2) °C for a minimum of 1 h. Increase the internal pressure at a steady rate to the lower test pressure specified in Table 1 for the application concerned, over a period of between 30 s and 120 s. Hold the lower test pressure for not less than 5 min. Check for leakage. If leakage is apparent, take suitable corrective action. If no leakage is apparent, increase the pressure at a steady rate until it reaches the higher test pressure specified in Table 1, in a period of not less than 15 s. Hold the higher test pressure for not less tha
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