1、July 2015 Translation by DIN-Sprachendienst.English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 7
2、5.200; 23.040.01!%D9*“2332207www.din.deDDIN ISO 16486-5Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing andmechanical jointing Part 5: Fitness for purpose of the system (ISO 16486-5:2012),English translation of DIN ISO 16486-5
3、:2015-07Kunststoff-Rohrleitungssysteme fr die Gasversorgung Rohrleitungssysteme aus weichmacherfreiem Polyamid (PA-U) mit Schweiverbindungenund mechanischen Verbindungen Teil 5: Gebrauchstauglichkeit des Systems (ISO 16486-5:2012),Englische bersetzung von DIN ISO 16486-5:2015-07Systmes de canalisati
4、ons en matires plastiques pour la distribution de combustiblesgazeux Systmes de canalisations en polyamide non plastifi (PA-U) avec assemblages parsoudage et assemblages mcaniques Partie 5: Aptitude lemploi du systme (ISO 16486-5:2012),Traduction anglaise de DIN ISO 16486-5:2015-07www.beuth.deIn cas
5、e of doubt, the German-language original shall be considered authoritative.Document comprises 25 pages06.15 DIN ISO 16486-5:2015-072A comma is used as the decimal marker. Contents Page National foreword .3 National Annex NA (informative) Bibliography .4 Introduction .5 1 Scope .5 2 Normative referen
6、ces .5 3 Terms, definitions, symbols and abbreviated terms .7 3.1 Terms and definitions General .7 3.2 Terms and definitions for preparation of test assemblies by electrofusion 7 4 Fitness for purpose . 10 4.1 Method of preparation of assemblies for testing . 10 4.2 Requirements for fitness for purp
7、ose . 10 Annex A (normative) Preparation of test assemblies by butt fusion . 15 Annex B (normative) Preparation of test assemblies by electrofusion . 18 Annex C (normative) Test methods for the assessment of fitness for purpose of transition fittings 23 Bibliography . 25 National foreword This docum
8、ent (ISO 16486-5:2012) has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids”, Subcommittee SC 4 “Plastic pipes and fittings for the supply of gaseous fuels”. The responsible German body involved in its preparation was the DIN-Normenauss
9、chuss Kunststoffe (DIN Standards Committee Plastics), Working Committee NA 054-05-08 AA Kunststoff-Rohrleitungssysteme fr die Gasversorgung. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN and/or ISO shall not be held responsi
10、ble for identifying any or all such patent rights. DIN ISO 16486 consists of the following parts, under the general title: Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing: Part 1: General Part 2: Pipes
11、 Part 3: Fittings Part 5: Fitness for purpose of the system Part 6: Code of practice for design, handling and installation DIN ISO 16486-5:2015-073For the International Standards referred to in this document there are no national standards available unless they have been published as DIN EN ISO Stan
12、dards with the same number, except for those below which correspond as follows: ISO 16486-1 DIN ISO 16486-1 ISO 16486-2 DIN ISO 16486-2 ISO 16486-3 DIN ISO 16486-3 National Annex NA (informative) Bibliography DIN ISO 16486-1, Plastics piping systems for the supply of gaseous fuels Unplasticized poly
13、amide (PA-U) piping systems with fusion jointing and mechanical jointing Part 1: General DIN ISO 16486-2, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 2: Pipes DIN ISO 16486-3, Plastics piping
14、systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 3: Fittings DIN ISO 16486-5:2015-074Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and m
15、echanical jointing Part 5: Fitness for purpose of the system IntroductionThin wall thickness unplasticized polyamide (PA-U) pipes and solvent cement joints are used typically for low pressures, while thicker wall thickness pipes and butt fusion, electrofusion or mechanical joints are typically used
16、for high pressures.For technical and safety reasons, it is not possible to mix the components of the two types of piping system (thin wall thickness pipes cannot be jointed by butt fusion or mechanical joints and vice versa). In particular, solvent cement joints must not be used for jointing for hig
17、h pressure piping systems.So for the time being, the standardization programme dealing with unplasticized polyamide (PA-U) piping systems for the supply of gaseous fuels is split into two series of International Standards, with one series (ISO 17467) covering piping systems the components of which a
18、re connected by solvent cement jointing and the other (ISO 16486) the components of which are connected by fusion jointing and/or mechanical jointing. When more experience will be gained from the field, it might be reasonable to merge the ISO 17467 series and the ISO 16486 series in one single serie
19、s applicable to PA-U piping systems.A similar series (ISO 17135) for fusion and mechanically jointed plasticized polyamide (PA-P) piping systems is in preparation.DIN ISO 16486-5:2015-0751 ScopeThis part of ISO 16486 specifies the requirements of fitness for purpose of the unplasticized polyamide (P
20、A-U) piping system, intended to be buried and used for the supply of gaseous fuels. It also specifies the definitions of electrofusion and butt fusion joints.This part of ISO 16486 specifies the method of preparation of test piece joints and the tests to be carried out on these joints for assessing
21、the fitness for purpose of the system under normal and extreme conditions. It also specifies the test parameters for the test methods to which it refers.ISO 16486 is applicable to PA-U piping systems the components of which are connected by fusion jointing and/or mechanical jointing.In conjunction w
22、ith the other parts of ISO 16486, it is applicable to PA-U fittings, their joints and to joints with components of PA-U.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, onl
23、y the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 291, Plastics Standard atmospheres for conditioning and testingISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determinatio
24、n of the resistance to internal pressure Part 1: General methodISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 4: Preparation of assembliesISO 6259-1, Thermoplastics pipes Determination of tensile proper
25、ties Part 1: General test methodISO 13953, Polyethylene (PE) pipes and fittings Determination of the tensile strength and failure mode of test pieces from a butt-fused jointISO 13954, Plastics pipes and fittings Peel decohesion test for polyethylene (PE) electrofusion assemblies of nominal outside d
26、iameter greater than or equal to 90 mmISO 13955, Plastics pipes and fittings Crushing decohesion test for polyethylene (PE) electrofusion assembliesISO 13956:2010, Plastics pipes and fittings Decohesion test of polyethylene (PE) saddle fusion joints Evaluation of ductility of fusion joint interface
27、by tear testISO 16486-1, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 1: GeneralISO 16486-2, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping system
28、s with fusion jointing and mechanical jointing Part 2: PipesISO 16486-3, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 3: FittingsDIN ISO 16486-5:2015-0763 Terms, definitions, symbols and abbrev
29、iated termsFor the purposes of this document, the terms, definitions, symbols and abbreviated terms given in ISO 16486-1 and the following apply.3.1 Terms and definitions General3.1.1electrofusion jointjoint between a PA-U electrofusion socket or saddle fitting and a pipe or a spigot end fittingNOTE
30、 The electrofusion fittings are heated by the Joule effect of the heating element incorporated at their jointing surfaces, causing the material adjacent to them to melt and the pipe and fitting surfaces to fuse.3.1.2butt fusion joint (using heated tool)joint made by heating the planed ends the surfa
31、ces of which match by holding them against a flat heating plate until the PA-U material reaches fusion temperature, removing the heating plate quickly and pushing the two softened ends against one another3.1.3fusion compatibilityability of two unplasticized polyamide materials of the same type to be
32、 fused together to form a joint which conforms to the performance requirements of this part of ISO 164863.1.4transition fittingfitting that makes a transition joint between a unplasticized polyamide (PA-U) piping and a metallic pipe3.1.5transition jointjoint at which two different piping materials (
33、the PA-U and metal piping) are connected3.1.6anodeless risertype of transition fitting which is designed to transport gas from an underground unplasticized polyamide (PA-U) service line to above-ground steel pipingNOTE In an anodeless riser, the PA-U pipe is always the gas carrier, at least, in the
34、below ground section.3.2 Terms and definitions for preparation of test assemblies by electrofusion3.2.1reference timetRtheoretical fusion time indicated by the fitting manufacturer for the reference ambient temperatureNOTE See Annex B.3.2.2fusion energyelectrical energy supplied during the fusion-jo
35、inting cycle as measured at the terminals of the fitting at a given ambient temperature, Ta, and for electrical parameters whose values lie within the tolerance ranges declared by the manufacturerNOTE 1 The fitting manufacturer is generally required to state in the technical file any variations in f
36、usion energy input required as a function of the ambient temperature in the range Tminto Tmax.NOTE 2 Where applicable, energy measurement should exclude the effect of terminal contact resistance.NOTE 3 See Annex B.DIN ISO 16486-5:2015-0773.2.3reference energyenergy supplied to a fitting having a nom
37、inal electrical resistance and using the nominal fusion parameters defined by the manufacturer at the reference ambient temperature, TRNOTE See Annex B.3.2.4maximum energymaximum value of the fusion energy supplied for jointing at a given ambient temperature, TaNOTE See Annex B.3.2.5minimum energymi
38、nimum value of the fusion energy supplied for jointing at a given ambient temperature, TaNOTE See Annex B.3.2.6nominal energynominal energy supplied for jointing at given ambient temperature, TaNOTE See Annex B.3.3 SymbolsApplication Symbol Description UnitSymbols used in more than one phase of the
39、fusion-jointing cycleaennominal pipe wall thickness mmdnnominal external diameter of the pipe p pressure applied to the butt fusion joint interface t duration of each phase in the fusion cycle Tnornormal temperature (23 2) C CTmaxmaximum permissible ambient temperature CTminminimum permissible ambie
40、nt temperature CSymbols for joint geometryaamisalignment between the pipes or fittings to be butt fused, expressed in terms of the difference, in millimetres, between, the external diametersmmwclearance between the fusion faces, expressed in terms of the gap, in millimetres, between the prepared fac
41、esmmSymbols for ambient temperatureabTaambient temperature at which the joint is made CSymbols butt fusion cycle parametersa GeneralT heater-plate temperature, measured in the zone of the heater-plate surface in contact with the pipe or spigot ends to be butt fusedC Phase 1: heating p1interface pres
42、sure during the heating phase, i.e. the pressure applied in the contact zoneMPaB1initial bead width taken as the bead width at the end of the heating phasemmt1heating time, taken as the time necessary to obtain a bead of width B1in the joint region during the heating phasesN1) National footnote: The
43、 clause numbering (3.2.1 “Symbols”) in the original ISO document is incorrect and should read: “3.3 Symbols”. This has been corrected in the German version, and correspondingly in the English version. N1)DIN ISO 16486-5:2015-078Application Symbol Description Unit Phase 2: heat soak p2pressure betwee
44、n the heater plate and the pipe or spigot ends during the heat soak phaseMPat2duration of internal heating during the heat soak phase s Phase 3: withdrawal of heater platet3time between the moment when the heater plate is removed from the pipe and/or spigot ends and the moment when the pipe and/or s
45、pigot ends are placed in contact with each others Phase 4: pressure increase t4time required to establish the butt fusion pressure s Phase 5: butt fusion p5pressure applied to the contact zone during the butt fusion phaseMPat5time during which the assembly remains under the butt fusion pressure in t
46、he machines Phase 6: cooling t6cooling time during which the butt fused assembly is not subjected to any rough handling; this cooling can take place outside the machineminB2bead width obtained at the end of the cooling phase mmSymbols for the preparation of test assemblies by electrofusioncDimmean i
47、nside diameter of the fusion zone of a fitting in the radial plane located a distance L3+ 0,5L2from the face of the fitting socketmmDim,maxmaximum theoretical value of Dimas declared by the fitting manufacturermmDi,maxmaximum inside diameter of the fusion zone of the fitting mmDi,minminimum inside d
48、iameter of the fusion zone of the fitting mmdeoutside diameter of a pipe or fitting spigot mmdemmean outside diameter of a pipe or fitting spigot in conformance with ISO 16486-2 and ISO 16486-3, as applicable, and calculated from the measured circumferencemmdempmean outside diameter of a pipe or fit
49、ting spigot after preparation for assembly with the outer layer removed by scraping or peeling and calculated from the circumference measured in a radial plane coincident with the centre of the fusion zone at a distance L3+ 0,5L2from the face of the fitting socket after assemblymmennominal wall thickness of the pipe mmesdepth of scraping or the thickness of material removed from the pipe surface by peelin
