SIST EN 15266:2007
(Main)Stainless steel pliable corrugated tubing kits in buildings for gas with an operating pressure up to 0,5 bar
Stainless steel pliable corrugated tubing kits in buildings for gas with an operating pressure up to 0,5 bar
This European Standard specifies the requirements for material, design, manufacture, testing, marking and documentation of stainless steel pliable corrugated gas tubing kits for buildings with a maximum operating pressure (MOP) less than or equal to 0,5 bar and a nominal size range from DN 10 to DN 50.
This document applies to stainless steel pliable corrugated gas tubing kits used for 1st, 2nd and 3rd family gases in residential, commercial and industrial gas installations.
This document does not apply to:
- pliable tubing without cover;
- corrugated safety metal hose assemblies for connection to moveable appliances.
This document does not cover the installation aspects of stainless steel pliable corrugated gas tubing kits.
Nichtrostende biegbare Wellrohrbausätze in Gebäuden für Gas mit einem Arbeitsdruck bis 0,5 bar
Diese Europaische Norm legt die Anforderungen an Werkstoff, Auslegung, Herstellung, Prufung, Kennzeich-nung
und Dokumentation von nichtrostenden biegbaren Wellrohrsystemen fur Gas in Gebauden und fur einen
maximalen Arbeitsdruck !Â0,5 bar fest, bei einem Nennweitenbereich von DN 10 bis DN 50.
Dieses Dokument gilt fur neu installierte Anlagen sowie fur Austausch, Erweiterung oder Anderung bestehen-der
Systeme fur Gase der 1., 2. und 3. Familie. Nichtrostende biegbare Wellrohrsysteme fur Gas konnen in
Verbindung mit anderen zugelassenen Rohrleitungssystemen fur Gas verwendet werden.
ANMERKUNG Festlegung von Gasen der 1., 2. und 3. Familie, siehe EN 437:2003.
Dieses Dokument gilt nicht fur:
.biegbare Wellrohrsysteme ohne Ummantelung;
.gewellte Sicherheits-Gasschlauchleitungen aus Metall fur den Anschluss von beweglichen Geraten.
Dieses Dokument behandelt keine Anforderungen bezogen auf den Einbau von nichtrostenden biegbaren
Wellrohrsystemen fur Gas, welche ortlichen und/oder nationalen Regelungen mit verbindlich vorgeschrie-
benen Festigkeits- und Dichtheitsprufungen vor der Inbetriebnahme unterliegen konnen.
Kits de tuyaux onduleux pliables en acier inoxydable pour le gaz dans les bâtiments avec une pression de service inférieure ou égale a 0,5 bar
La pr¨¦sente Norme europ¨¦enne d¨¦finit les prescriptions relatives au mat¨¦riau, ¨¤ la conception, ¨¤ la fabrication,
aux essais, au marquage et ¨¤ la documentation des syst¨¨mes de tuyaux onduleux pliables en acier
inoxydable pour le gaz dans les batiments avec une pression maximale de service !Ü0,5 bar, et une gamme
de diam¨¨tres nominaux compris entre DN 10 et DN 50.
Le pr¨¦sent document s'applique aux nouvelles installations, aux installations se substituant aux syst¨¨mes
existants, aux extensions ou aux modifications desdits syst¨¨mes, destin¨¦s ¨¤ ¨otre utilis¨¦s avec des
combustibles gazeux des premi¨¨re, deuxi¨¨me et troisi¨¨me familles. Les syst¨¨mes de tuyaux de gaz onduleux
en acier inoxydable peuvent ¨otre utilis¨¦s en combinaison avec d'autres tuyauteries de gaz autoris¨¦es.
NOTE Les d¨¦finitions des combustibles gazeux des premi¨¨re, deuxi¨¨me et troisi¨¨me familles sont donn¨¦es dans
l'EN 437:2003.
Le pr¨¦sent document ne s'applique pas :
.aux tuyaux onduleux pliables sans protection ;
.aux tuyaux m¨¦talliques flexibles onduleux de s¨¦curit¨¦ pour le raccordement d'appareils mobiles.
Le pr¨¦sent document ne traite pas des aspects li¨¦s ¨¤ l'installation des syst¨¨mes de tuyaux onduleux pliables
en acier inoxydable pour le gaz susceptibles d'¨otre soumis ¨¤ des r¨¦glementations locales et/ou nationales
impliquant la r¨¦alisation d'essais de r¨¦sistance et de pression d'¨¦tanch¨¦it¨¦ obligatoires avant toute mise en
service.
Upogljivi valoviti cevni kompleti iz nerjavnega jekla za plin v stavbah z delovnim tlakom do 0,5 bara
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Upogljivi valoviti cevni kompleti iz nerjavnega jekla za plin v stavbah z delovnim tlakom do 0,5 baraNichtrostende biegbare Wellrohrbausätze in Gebäuden für Gas mit einem Arbeitsdruck bis 0,5 barKits de tuyaux onduleux pliables en acier inoxydable pour le gaz dans les bâtiments avec une pression de service inférieure ou égale a 0,5 barStainless steel pliable corrugated tubing kits in buildings for gas with an operating pressure up to 0,5 bar91.140.40Sistemi za oskrbo s plinomGas supply systems77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific useICS:Ta slovenski standard je istoveten z:EN 15266:2007SIST EN 15266:2007en,de01-junij-2007SIST EN 15266:2007SLOVENSKI
STANDARD
SIST EN 15266:2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15266May 2007ICS 23.040.01 English VersionStainless steel pliable corrugated tubing kits in buildings for gaswith an operating pressure up to 0,5 barKits de tuyaux onduleux pliables en acier inoxydable pour legaz dans les bâtiments avec une pression de serviceinférieure ou égale à 0,5 barNichtrostende biegbare Wellrohrbausätze in Gebäuden fürGas mit einem Arbeitsdruck bis 0,5 barThis European Standard was approved by CEN on 17 February 2007.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 CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15266:2007: ESIST EN 15266:2007
EN 15266:2007 (E) 2 Contents Page Foreword.4 Introduction.5 1 Scope.6 2 Normative references.6 3 Terms, definitions and abbreviations.7 4 Design requirements.8 4.1 General.8 4.2 Materials.8 4.3 Nominal size DN and pressure drop.9 4.4 Threads.9 4.5 PLT fittings.9 4.6 Seals and sealing agents.10 4.7 Environment.10 4.8 Supports.10 4.9 Electrical conductivity requirements.10 4.10 Cover.10 5 Performance and test requirements.10 5.1 General.10 5.2 Tightness.13 5.3 Dimensional check.14 5.4 Bending performance.14 5.5 Crushing resistance.15 5.6 Stability under pressure.17 5.7 Wear resistance of outer cover.17 5.8 Structural strength test.18 5.9 Impact resistance.18 5.10 Penetration resistance.19 5.11 Resistance to pull out.20 5.12 Chemical resistance.21 5.13 Low temperature resistance.24 5.14 Ageing.24 5.15 Tightness in case of fire.27 5.16 Reaction to fire.27 5.17 Electrical conductivity.27 5.18 Pressure drop.28 5.19 Maximum load for admissible deformation of PLT support.32 5.20 Dangerous substances.34 6 Evaluation of conformity.34 6.1 General.34 6.2 Type testing.34 6.3 Factory production control (FPC).36 6.4 Assembly and installation instruction.38 6.5 Marking, labelling and packaging.39 Annex A (normative)
Single-flame source test.40 A.1 A.1
General.40 A.2 A.2
Standardised mounting and fixing.40 A.3 A.3
Test definition.40 A.4 A.4
Test duration.40 SIST EN 15266:2007
EN 15266:2007 (E) 3 Annex B (normative) Thermal attack by a single burning item.42 B.1 General.42 B.2 Standardised mounting and fixing.42 Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive (89/106/EEC).44 ZA.1 Scope and relevant characteristics.44 ZA.2
Procedure for attestation of conformity of stainless steel pliable corrugated gas tubing kits.46 ZA.2.2 EC Certificate and declaration of conformity.48 ZA.3
CE marking and labelling.49 Bibliography.52
SIST EN 15266:2007
EN 15266:2007 (E) 4 Foreword This document (EN 15266:2007) has been prepared by Technical Committee CEN/TC 342 “Metal hoses, hose assemblies, bellows and expansion joints”, the secretariat of which is held by UNI. 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 November 2007, and conflicting national standards shall be withdrawn at the latest by February 2009. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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. SIST EN 15266:2007
EN 15266:2007 (E) 5
Introduction This European Standard contains the general safety requirements relating to the safety of persons, animals and property and the protection of their environment. The requirements of this standard concern designers, manufacturers, suppliers and importers of stainless steel pliable corrugated gas tubing kits for buildings. Installation and mandatory strength and tightness tests before commissioning should consider the local application regulations where they exist. This document is applicable to:
new installation pipework; replacements of existing installations; or extensions to existing installations. Stainless steel pliable corrugated gas tubing kits can be used in conjunction with other approved gas pipework. SIST EN 15266:2007
EN 15266:2007 (E) 6
1 Scope This European Standard specifies the requirements for material, design, manufacture, testing, marking and documentation of stainless steel pliable corrugated gas tubing kits for buildings with a maximum operating pressure (MOP) less than or equal to 0,5 bar and a nominal size range from DN 10 to DN 50. This document applies to stainless steel pliable corrugated gas tubing kits used for 1st, 2nd and 3rd family gases in residential, commercial and industrial gas installations. This document does not apply to: pliable tubing without cover; corrugated safety metal hose assemblies for connection to moveable appliances. This document does not cover the installation aspects of stainless steel pliable corrugated gas tubing kits.
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 437, Tests gases - Test pressures – Appliance categories EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment EN 682, Elastomeric seals – Materials requirements for seals used in pipes and fittings carrying gas and hydrocarbon fluids EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 1: Anaerobic jointing compounds EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 2: Non-hardening jointing compounds
EN 751-3, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 3: Unsintered PTFE tapes EN 1363-1:1999, Fire resistance tests – Part 1: General requirements EN 1775:1998, Gas supply - Gas pipework for buildings - Maximum operating pressure ≤ 5 bar - Functional recommendations EN 10028-7, Flat products made of steels for pressure purposes – Part 7: Stainless steels EN 10088-3, Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes EN 10226-1, Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external threads and parallel internal threads - Dimensions, tolerances and designation EN 10242, Threaded pipe fitting in malleable cast iron SIST EN 15266:2007
EN 15266:2007 (E) 7 EN 12164, Copper and copper alloys – Rod for free machining purposes EN 12165, Copper and copper alloys – Wrought and unwrought forging stock EN 13501-1:2002, Fire classification of construction products and building elements - Part 1: Classification using test data from reaction to fire tests EN 13823, Reaction to fire tests for building products - Building products excluding floorings exposed to the thermal attack by a single burning item EN ISO 6509, Corrosion of metals and alloys - Determination of dezincification resistance of brass (ISO 6509:1981) EN ISO 7369:2004, Pipework - Metal hoses and hose assemblies - Vocabulary (ISO 7369:2004) EN ISO 9001:2000, Quality management systems - Requirements (ISO 9001:2000) EN ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227:2006) EN ISO 10380:2003, Pipework - Corrugated metal hoses and hose assemblies (ISO 10380:2003) EN ISO 11925-2, Reaction to fire tests - Ignitability of building products subjected to direct impingement of flame - Part 2: Single-flame source test (ISO 11925-2:2002) ISO 6957, Copper alloys - Ammonia test for stress corrosion resistance 3 Terms, definitions and abbreviations For the purposes of this document, the terms and definitions listed in EN ISO 7369:2004, EN 1775:1998 and the following apply. 3.1 pliable tubing (PLT)
corrugated tubing capable of being bent easily by hand a limited number of times, covered with a tubular outer sheath by the manufacturer at the time of production 3.2 PLT kit pliable tubing with its related components obtained or specified from one manufacturing source having design and performance responsibility for the kit 3.3 bend radius radius measured to the centre line of the pliable tubing 3.4 PLT fitting unique fitting using mechanical attachment methods, in which tightness is achieved with or without seals, excluding other joining methods such as welding, brazing, soldering or gluing 3.4.1 end fitting PLT fitting intended to join pliable tubing to an external component 3.4.2 coupling PLT fitting intended to join two sections of pliable tubing SIST EN 15266:2007
EN 15266:2007 (E) 8 3.4.3 tee PLT fitting to join three sections of pliable tubing
3.4.4 manifold PLT fitting designed to join 4 or more sections of pliable tubing 3.5 seal any part intended to provide tightness within a PLT fitting 3.6 sleeve tubular outer sheath intended to protect the connection between the pliable tubing and a PLT fitting from corrosion or mechanical damage 3.7 PLT support element used to attach the PLT kit to the structure of the building 3.8 rated flow rate
flow rate at a given pressure drop, under standard reference conditions 3.9 family group of products produced by one manufacturer for which test results for one product of that group are representative of the characteristics for the whole group
3.10 gas 1st, 2nd and 3rd family gases as defined in EN 437
NOTE These gases are commonly referred to as manufactured gases, natural gas and liquefied petroleum gases.
4 Design requirements 4.1 General Where additional components are required to complete the PLT kit, these components shall be provided or specified by the kit manufacturer. 4.2 Materials Materials for the manufacture of a PLT kit shall be selected from Table 1 and on the basis of their related suitability for fabrication, e.g. welding, cold forming, etc. as appropriate, and the conditions under which they will be used. SIST EN 15266:2007
EN 15266:2007 (E) 9
Table 1 — Materials Component Material Pliable tubing Cover Stainless steel according to EN 10028-7: 1.4306, 1.4541, 1.4404, 1.4401, 1.4571
Synthetic material a PLT fittings Stainless steel according to EN 10088-3, copper alloys according to EN 12164 and EN 12165 PLT manifold/tees Stainless steel according to EN 10088-3, copper alloys according to EN 12164 and EN 12165 Malleable cast iron according to EN 10242 types W 400-05; W 350-04; B 350-10 or B 300-06 Supports Metallic corrosion resistant material a
see 4.10
4.3 Nominal size DN and pressure drop The nominal size of a PLT kit shall be selected from the DNs given in EN ISO 10380:2003, Table 2. The nominal size range shall be from DN 10 to DN 50. The minimum bore size of the pliable tubing shall be at least 98 % of the nominal size DN in mm. The manufacturer shall declare the related pressure drop (see 5.18) for each nominal size DN (see 6.4). 4.4 Threads End fittings shall have terminating threads according to EN 10226-1.
Integrated threads within the mechanical attachment of the PLT fittings shall not be compatible with
EN 10226-1.
4.5 PLT fittings 4.5.1 General PLT fittings shall provide a tight connection to the pliable tubing. PLT fittings, whether surface finished or not, shall be manufactured from materials listed in Table 1. Copper alloys shall be selected from EN 12164 and/or EN 12165 and shall contain at least 57 % copper and not more than 3,5 % lead. 4.5.2 Stress corrosion All fittings and components of copper alloy shall be resistant to stress corrosion. Stress corrosion resistance shall be determined in accordance with ISO 6957 (pH 9,5). 4.5.3 Dezincification All copper alloys components shall resist dezincification. If an alloy contains more than 10 % of zinc, its corrosion behaviour shall be assessed according to
EN ISO 6509. SIST EN 15266:2007
EN 15266:2007 (E) 10 4.6 Seals and sealing agents Where seals or sealing agents are used in the PLT kit and are exposed to gas, they shall be selected from the appropriate European Standards (EN 549, EN 682, EN 751-1, EN 751-2 and EN 751-3).
4.7 Environment PLT kit components shall be resistant to any corrosive agent reasonably foreseen in the conditions of the declared intended use.
They shall be durable to climatic conditions according to 5.14 for a reasonably economic working life. They shall withstand a temperature range of – 40 °C to 60 °C. NOTE The manufacturer should advise in his installation instructions that where exposed, sections of PLT kits can be protected against excessive mechanical force that can cause damage. Casing/trunking can be used to fulfil this requirement. 4.8 Supports Supports shall be made of materials mechanically and chemically non aggressive with the other components of the PLT kit with which they are in contact. Supports shall be designed to carry the system load for a minimum of 30 min in case of fire. The standard temperature/time curve shall be as given in EN 1363-1:1999, Figure 7. The manufacturer shall supply installations instructions that give the correct support design for the kit supplied. The instructions shall also emphasize the need to design the support fixings to the structure in such a way that maintains the integrity of the system in case of fire for a period not less than the period for which the supports are designed to carry the system load.
4.9 Electrical conductivity requirements PLT kit components shall be electrically conductive, see 5.17. NOTE The manufacturer should advise in his installation instructions that equipotential bonding should be in accordance with local application regulations.
4.10 Cover The cover shall satisfy the tests according to 5.4, 5.7, 5.12, 5.13, 5.14 and 5.16.
If the materials of the cover contain corrosive agents or ingredients such as sulphur or chlorine, such agents shall not be released during manufacturing process or during intended service conditions. For the purpose of safety, the prevailing colour of the cover shall be yellow, e.g. RAL 1004, 1016, 1018. 5 Performance and test requirements 5.1 General 5.1.1 Introduction The number and the type of PLT kit samples to be tested, the tests and the compliance criteria shall be as given in 6.2.2, Table 11. SIST EN 15266:2007
EN 15266:2007 (E) 11 If any nominal size fails one of the tests within the test sequence schedule given in 5.1.3, Table 3, then all samples of that nominal size will be deemed to have failed to meet the type test requirements of this standard. Unless otherwise specified in this document: all dimensions shall be in mm. the tests shall be carried out with the cover in place. the tests performed will qualify the other sizes in the same family as specified in Table 2.
Tests results shall only apply to components of the same design and same material.
Table 2 — Test requirements Nominal size
to be tested a Family Qualified diameters DN DN 12 X DN 10 - DN 12 - DN 15 DN 25 Y DN 20 - DN 25 - DN 32 DN 50 Z DN 40 - DN 50 a If these sizes are not available, the largest DN in the relevant family shall be tested.
The tests shall be performed under ambient conditions. If not otherwise indicated the following tolerances shall apply: atmospheric pressure: (+/- 0,1) mbar; flow rate: (+/- 5)%; temperature above 125°C: (+/- 10)°C; dimensions: (+/- 0,1) mm; air pressure: (+/- 5)%; ambient temperature: (+/- 1)°C; time: (+/- 0,1)%; sample length: (-1/+3)%. 5.1.2 Type of PLT kit samples
The PLT kit samples used in the following tests shall be assembled in accordance with the manufacturers’ instructions. Prior to assembling, each length of the pliable tubing shall be tested according to 5.3. Depending on the test, Type 1 samples (see Figure 1) or Type 2 samples (see Figure 2) shall be used.
Type 1: End fitting – pliable tubing – end fitting SIST EN 15266:2007
EN 15266:2007 (E) 12 Dimensions in millimetres
Figure 1 — PLT sample Type 1 Type 2: End fitting – pliable tubing – coupling – pliable tubing – end fitting Dimensions in millimetres
Figure 2 — PLT sample Type 2 SIST EN 15266:2007
EN 15266:2007 (E) 13 5.1.3 Test sequence schedule Table 3 gives the sequence to be followed for each test. Table 3 — System test sequence schedule Test sequence Test Tests to verify the characteristics
1 2 3 4 5 Clause of this standard A Tightness test
A - - - - 5.2 B Dimensional check B - - - - 5.3 C Bending performance B A C A - 5.4 D Crushing resistance B A D A B 5.5 E Stability under pressure B A E A - 5.6 F Wear resistance of outer cover F - - - - 5.7 G Structural strength B A G A - 5.8 H Impact resistance B A H A - 5.9 I Penetration resistance B A I A - 5.10 J Resistance to pull out B A J A - 5.11 K Chemical resistance A K A - - 5.12 L Low temperature resistance A L A - - 5.13 M Ageing A M A - - 5.14 N Tightness in case of fire A N A - - 5.15 O Reaction to fire O - - - - 5.16 P Electrical conductivity P - - - - 5.17 Q Pressure drop A Q - - - 5.18 R Maximum load for admissible deformation R - - - - 5.19 Example Test H is preceded by tests B and A and followed by test A.
5.2 Tightness 5.2.1 Tightness for test samples 5.2.1.1 Requirements The PLT kit shall be tight when tested in accordance with the method given in 5.2.1.2. The initial tightness test shall be performed with the cover in place. For the final tightness test, the cover shall be removed in order that it does not contribute to the achievement of the tightness.
5.2.1.2 Test method When held under water and containing air at a pressure of 2 bar the leakage rate of a test sample shall not exceed 10 cm3/h. NOTE A helium leakage rate not exceeding (7 x 10-3) mbar l/s is equivalent to the above requirement. SIST EN 15266:2007
EN 15266:2007 (E) 14 A helium leakage rate not exceeding (7x 10-3) mbar l/sec shall be equivalent to the above requirement. 5.2.2 Tightness for FPC
5.2.2.1 Requirements The PLT shall be tight when tested in accordance with the method given in 5.2.2.2. The tightness test shall be performed just prior to the cover being applied. Any operation after the cover being applied which may influence the tightness shall require retesting with the cover in place. 5.2.2.2 Test method When held under water and containing air at a pressure of 2 bar the leakage rate of a PLT shall not exceed 10 cm3/h per 25 m. NOTE A helium leakage rate not exceeding (7x 10-3) mbar l/sec is equivalent to the above requirement.
5.3 Dimensional check
5.3.1 Requirements When subjected to the following test method, every sample length of pliable tubing shall show no sign of inner diameter restriction. 5.3.2 Test method A metal sphere or gauge, calibrated to (98 + 0/- 0,5) % of the DN shall pass through the length. 5.4 Bending performance 5.4.1 Requirements After being bent through 12 cycles in accordance with 5.4.2, PLT samples shall be leak tight when tested in accordance with 5.2.1.2 and there shall be no visible cracks in the cover. 5.4.2 Test method The samples shall be subjected to a bend test as shown in Figure 3. With one end rigidly fixed the other shall be moved to a starting position A in a circular arc around a former having a radius calculated from the bend radius (pliable test) as given in EN ISO 10380:2003, Table 2, type 3, until the tubing is in intimate contact with the full length of the arc of the former. Throughout the test, the sample shall be pressurised with air at a pressure of 500 mbar. The PLT sample shall be bent 12 times through an arc of 180°, the first cycle comprises one bend starting in a position A moving through B to the end position C, the second cycle being a movement from position C through B to the end position A. The longitudinal seam weld shall be located in accordance with position 3 (see Figure 3). If helical welding is used, the orientation of the weld shall be ignored. The test frequency shall be between 5 cycles/min and 15 cycles/min. SIST EN 15266:2007
EN 15266:2007 (E) 15
Key
r former radius R bend radius 1 pressure sensor 2 end fittings 3 weld seam orientation Figure 3 — Bending test configuration 5.5 Crushing resistance 5.5.1 Requirements When tested in accordance with 5.5.2, the bore size of the pliable tubing shall not be reduced by more than 15 % of its nominal size DN, and it shall remain tight. 5.5.2 Test method The internal diameter shall be determined by using the method described in 5.3.2 before the crushing test. The corrugated part of the PLT kit sample shall be placed on a hard flat support surface. A load of
4000 N shall be gradually applied on a square steel plate of 150 mm side p
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