TL52439_EN_2009-11-01.pdf

Polyamide PipePolyamide Pipe Material Requirements Previous issuesPrevious issues TL 52439: 1995-02, 2002-10, 2008-12 ChangesChanges The following changes have been made as compared to TL 52439: 2008-12: Restriction regarding use with gasoline added Tests detailed Stricter limit values added ScopeScope This Technical Supply Specification (TL standard) defines the material requirements for pipes made of polyamide 11 and polyamide 12 used, e.g., for diesel fuel lines. Smooth PA pipes acc. to TL 52439 must not be used for gasoline applications and their derivatives. DescriptionDescription PA pipe according to TL 52439PA pipe according to TL 52439 RequirementsRequirements General requirementsGeneral requirements Approval of first supply and changes according to Volkswagen standard VW 01155. Resistance to open-air weathering according to VW 50185. 1 1 2 2 3 3 3.1 3.1 Group StandardGroup StandardTL 52439TL 52439 Issue 2009-11 Class. No.:55123 D D Descriptors:polyamide 11, polyamide 12, PA, PA11, PA12, pipe, fuel line Check standard for current issue prior to usage.Check standard for current issue prior to usage. This electronically generated standard is authentic and valid without signature.This electronically generated standard is authentic and valid without signature. The English translation is believed to be accurate. In case of discrepancies the German version shall govern.The English translation is believed to be accurate. In case of discrepancies the German version shall govern. Numerical notation acc. to ISO practice.Numerical notation acc. to ISO practice. Page 1 of 5 Technical responsibilityStandards Department GQL-LP/4Dr. Lars FölsterTel.: +49-5361-9-122549 GQL-LPDr. Roger Hillert EKDV/4 Ute Hager-SüßEKDV Tel.: +49-5361-9-49035Manfred Terlinden Confidential. All rights reserved. No part of this document may be transmitted or reproduced without prior permission of a Standards Department of the Volkswagen Group.Confidential. All rights reserved. No part of this document may be transmitted or reproduced without prior permission of a Standards Department of the Volkswagen Group. Parties to a contract can only obtain this standard via the B2B supplier platform www.vwgroupsupply.com.Parties to a contract can only obtain this standard via the B2B supplier platform www.vwgroupsupply.com. © Volkswagen Aktiengesellschaft© Volkswagen AktiengesellschaftVWNORM-2008-12k Avoidance of hazardous substances according to VW 91101. Limit deviations according to DIN 73378. A complete examination requires prefabricated lines containing approximately 10 m of PA pipe. Forming must be made using the procedure planned for standard production. QualityQuality The pipes must be free of flaws and processing defects, such as bubbles, voids, cracks, irregularities, and foreign matter. The pipes must exhibit no weak spots arising in connection with processing steps that are necessary for fabrication, such as beading operations or assembly of support sleeves and punch connectors. ManufactureManufacture Coextrusion method in which the pipe wall is made of two or more layers of the same material, optionally extrusion/thermoforming method. Marking according to Marking according to VDA 260VDA 260 PA11 PA12 AgingAging Prior to testing, the specimens required for the individual tests must be conditioned for at least 48 h in the ISO 55423/50 standard climate. Evaluation of measurement resultsEvaluation of measurement results The requirements apply to all points on the pipe or pipe assembly. The required numerical values apply to each individual measurement. Material requirementsMaterial requirements MaterialMaterial See Section 6.1. Polyamide 11, stabilized against aging at elevated temperature and against light, or polyamide 12, stabilized against aging at elevated temperature and against light. Molding material designation according to Molding material designation according to DIN EN ISO 1874-1DIN EN ISO 1874-1 PA11, EHL, 22-010 or PA12, EHL, 22-010 ColorColor According to drawing. Coloring must be uniform throughout. Required propertiesRequired properties See Table 1. 3.2 3.2 3.3 3.3 3.4 3.4 3.5 3.5 3.6 3.6 4 4 4.1 4.1 4.1.1 4.1.1 4.2 4.2 5 5 Page 2 TL 52439: 2009-11 D D Table 1Table 1 No.No.PropertiesPropertiesUnitUnitRequirementRequirement 1Density according to DIN EN ISO 1183-1, buoyancy method 1.1Pipe made of polyamide 11g/cm31,02 to 1,04 1.2Pipe made of polyamide 12g/cm31,00 to 1,02 2Extractable constituents see Section 6.2 % 3 3Yield stress in the direction of extru sion acc. to DIN EN ISO 527-2 and Section 6.3 MPa 32 4Elongation at break acc. to DIN EN ISO 527-2 and Section 6.3 % 100 5Equivalent stress acc. to DIN 53758 and Section 6.4 N/mm2 34 A bubble-shaped failure is required dur ing the accelerated internal pressure test, i.e., no brittle splitting (brittle frac ture) must occur. 6Low-temperature behavior acc. to PV 3905 and Section 6.5 No fracture 7Elevated-temperature behavior acc. to DIN 53497 and Section 6.6 No change in shape (especially in ther moformed areas), color or surface. 8Aging resistance acc. to DIN 53497 and Section 6.7 No fracture 9 Burning behavior Acc. to TL 1010 (if required in drawing and/or release). Notes on testingNotes on testing MaterialMaterial The identity test may be performed by infrared spectroscopy. Extractable constituentsExtractable constituents The extraction must be performed in an apparatus in which the rising steam of the extraction fluid heats the glass filter crucible or the extraction sleeve made of fibrous paper. Preferably, a Soxhlet extractor with a reflux cooling system must be used. The extraction time is (18 ± 1) h, and the ex traction fluid is ethanol. 5 g of granulate fraction of a crushed pipe specimen, which has been sifted through a test sieve with nominal mesh sizes of 0,5 mm and 3,5 mm according to DIN ISO 565, is used for the extraction. The extractable constituent content is calculated according to one of the following formulas: 6 6 6.1 6.1 6.2 6.2 Page 3 TL 52439: 2009-11 D D m0 - m1 m0 × 100 = extract (%) (1) Where: m0 = mass of weighed-in specimen, in g m1 = mass of non-extractable constituents, in g, that remain after extraction in the extraction vessel Yield stress and elongation at breakYield stress and elongation at break Tensile test according to DIN EN ISO 527-2, but on 150 mm long pipe sections; test rate of 100 mm/ min. The specimens are provided with 30 mm long steel mandrels in the clamping area. The diameter of the mandrels must equal the inside diameter of the specimen (nominal dimension) plus a maximum of 0,5 mm. The tensile test must be performed with vise jaws that are suitable for specimens made of round material. Equivalent stressEquivalent stress Accelerated internal pressure test according to DIN 53758. The equivalent stress is calculated ac cording to the following formula: V = PB × dm 20 s (N/mm2) (2) Where: PB = burst pressure, in bar dm = d1 s, average pipe diameter d1 = outer diameter, measured s = pipe wall thickness V = equivalent stress in radial direction Low-temperature behaviorLow-temperature behavior Ball drop test according to PV 3905 at (-40 ± 1) °C, but with base plate (specimen support surface) of 10 mm thick sheet steel without recess, on at least five 100 mm long sections of pipe; drop height of 650 mm; ball mass of 880 g. Elevated-temperature behaviorElevated-temperature behavior Elevated-temperature aging test according to DIN 53497, method B, on three 300 mm long sections of pipe, or in the case of thermoformed lines, on sections that include the formed area. Aging tem perature (110 ± 1) °C; aging duration (22 + 2) h. Aging resistanceAging resistance Elevated-temperature aging test according to DIN 53497, method B, to be performed on at least five plane pipe sections 80 mm long. Aging temperature (150 ± 1) °C; aging duration 200 h. Cooling down of specimens in a desiccator, followed by an impact resistance test according to 6.3 6.3 6.4 6.4 6.5 6.5 6.6 6.6 6.7 6.7 Page 4 TL 52439: 2009-11 D D DIN EN ISO 179-1 with a pendulum impact tester: Work equivalent of 7,5 J, support separation of 62 +0,5/ -0 mm. Referenced documentsReferenced documents The following documents cited in this standard are necessary for application. In this Section terminological inconsistencies may occur as the original titles are used. Standards with the titles given in German are either only available in German or may be procured in other languages from the institution issuing the standard. PV 3905Organic Materials; Ball Drop Test TL 1010Materials for Vehicle Interiors; Burning Behavior; Material Requirements VW 01155Vehicle Supply Parts; Approval of First Supply and Changes VW 50185Vehicle Parts; Resistance to Open-Air Weathering VW 91101Environmental Standard for Vehicles; Vehicle Parts, Materials, Operating Fluids; Avoidance of Hazardous Substances DIN 53497Testing of Plastics; Hot Storage Test on Mouldings Made of Thermoplastic Moulding Materials without External Mechanical Stressing DIN 53758Testing of plastics articles; determination of the effect of internal pressure on hollow objects by short-time test DIN 73378Polyamide tubing for motor vehicles DIN EN ISO 1183-1Plastics - Methods for determining the density of non-cellular plastics - Part 1: Immersion method, liquid pyknometer method and titration method DIN EN ISO 179-1Plastics - Determination of Charpy impact properties - Part 1: Non-instru mented impact test DIN EN ISO 1874-1Plastics - Polyamide (PA) moulding and extrusion materials - Part 1: Des ignation DIN EN ISO 527-2Plastics - Determination of tensile properties - Part 2: Test conditions for moulding and extrusion plastics DIN ISO 565Test sieves - Metal wire cloth, perforated metal plate and electroformed sheet - Nominal sizes of openings ISO 554Standard atmospheres for conditioning and/or testing; Specifications VDA 260Components of motor vehicles; marking of material 7 7 Page 5 TL 52439: 2009-11 D D