1、July 2015 Translation by DIN-Sprachendienst.English price group 12No 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,“2332209www.din.deDDIN ISO 16486-3Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing andmechanical jointing Part 3: Fittings (ISO 16486-3:2012 + AMD 1:2014),English translation of DIN ISO 16486-3:2015-07Kuns
3、tstoff-Rohrleitungssysteme fr die Gasversorgung Rohrleitungssysteme aus weichmacherfreiem Polyamid (PA-U) mit Schweiverbindungenund mechanischen Verbindungen Teil 3: Formstcke (ISO 16486-3:2012 + AMD 1:2014),Englische bersetzung von DIN ISO 16486-3:2015-07Systmes de canalisations en matires plastiqu
4、es pour la distribution de combustiblesgazeux Systmes de canalisations en polyamide non plastifi (PA-U) avec assemblages parsoudage et assemblages mcaniques Partie 3: Raccords (ISO 16486-3:2012 + AMD 1:2014),Traduction anglaise de DIN ISO 16486-3:2015-07www.beuth.deDocument comprises pagesIn case of
5、 doubt, the German-language original shall be considered authoritative.2307.15A comma is used as the decimal marker. Contents Page National foreword .3 National Annex NA (informative) Bibliography 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms, definitions, symbols and abbreviated term
6、s 7 4 Material .8 4.1 PA-U compound .8 4.2 Material for unplasticized polyamide parts .8 5 General characteristics .9 5.1 Appearance 9 5.2 Design .9 5.3 Colour .9 5.4 Electrical characteristics for electrofusion fittings 9 5.5 Appearance of factory-made joints 9 5.6 Fusion compatibility 9 6 Geometri
7、cal characteristics 10 6.1 Measurement of dimensions 10 6.2 Dimensions of electrofusion sockets 10 6.3 Dimensions of spigot end fittings 12 6.4 Dimensions of tapping tees 13 6.5 Dimensions of transition fittings to other materials 14 7 Mechanical characteristics .14 7.1 General 14 7.2 Conditioning .
8、14 7.3 Requirements .14 8 Physical characteristics 15 8.1 Conditioning .15 8.2 Requirements .16 9 Chemical resistance of fittings in contact with chemicals 16 10 Performance requirements .16 11 Marking .16 11.1 General 16 11.2 Minimum required marking of fittings .16 11.3 Additional information requ
9、ired on fitting or label .17 11.4 Fusion system recognition .17 12 Packaging .17 Annex A (informative) Examples of typical terminal connections for electrofusion fittings 18 Annex B (normative) Short-term pressure test method 20 Annex C (normative) Tensile test fitting/pipe assemblies 22 Bibliograph
10、y 23 DIN ISO 16486-3:2015-07 2 National foreword This document (ISO 16486-3:2012 + AMD 1:2014) has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids”, Subcommittee SC 4 “Plastics pipes and fittings for the supply of gaseous fuels”. The r
11、esponsible German body involved in its preparation was the DIN-Normenausschuss 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 b
12、e the subject of patent rights. DIN and/or ISO shall not be held responsible for identifying any or all such patent rights. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. DIN ISO 16486 consists of the following parts, under the general title Plas
13、tics 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 Part 3: Fittings Part 5: Fitness for purpose of the system Part 6: Code of practice for design, handling and installation For
14、the International Standards referred to in this document there are no national standards available unless they have been published as DIN EN ISO standards 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 16486-5 DIN
15、 ISO 16486-5 DIN ISO 16486-3:2015-07 3 National Annex NA (informative) Bibliography DIN ISO 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: General DIN ISO 16486-2, Plastics piping sys
16、tems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 2: Pipes DIN ISO 16486-5, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical joi
17、nting Part 5: Fitness for purpose of the system DIN ISO 16486-3:2015-07 4 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 ty
18、pically used 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 joi
19、nting for high 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 componen
20、ts of which are 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
21、 single series 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.Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing a
22、nd mechanical jointing Part 3: Fittings DIN ISO 16486-3:2015-07 5 1 ScopeThis part of ISO 16486 specifies the physical and mechanical properties of fittings made from unplasticized polyamide (PA-U) in accordance with ISO 16486-1, intended to be buried and used for the supply of gaseous fuels.It also
23、 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 addition, it lays down dimensional characteristics and requirements for the marking of fittings
24、.In conjunction with the other parts of ISO 16486, it is applicable to PA-U fittings, their joints, to joints with components of PA-U and to joints with mechanical fittings of other materials, and to the following fitting types: fusion fittings electrofusion fittings and butt fusion fittings; transi
25、tion fittings.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, only the edition cited applies. For undated references, the latest edition of the referenced document (includ
26、ing any amendments) applies.ISO 291, Plastics Standard atmospheres for conditioning and testingISO 307, Plastics Polyamides Determination of viscosity numberISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Par
27、t 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 3126, Plastics piping systems Plastics components Determination of dimensionsISO 4433-1, Thermoplastics
28、pipes Resistance to liquid chemicals Classification Part 1: Immersion test methodISO 11922-1:1997, Thermoplastic pipes for the conveyance of fluids Dimensions and tolerances Part 1: Metric seriesISO 13951:2001, Plastics piping systems Test method for the resistance of polyolefin pipe/pipe or pipe/fi
29、tting assemblies to tensile loadingISO 13953:2001, Polyethylene (PE) pipes and fittings Determination of the tensile strength and failure mode of test pieces from a butt-fused jointDIN ISO 16486-3:2015-07 6 ISO 13954, Plastics pipes and fittings Peel decohesion test for polyethylene (PE) electrofusi
30、on assemblies of nominal outside diameter greater than or equal to 90 mmISO 13955:1997, 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
31、of ductility of fusion joint interface by tear testISO 13957:1997, Plastics pipes and fittings Polyethylene (PE) tapping tees Test method for impact resistanceISO 16486-1:2012, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing
32、and mechanical jointing Part 1: GeneralISO 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: PipesISO 16486-5, Plastics piping systems for the supply of gaseous fuels Unplasticized polya
33、mide (PA-U) piping systems with fusion jointing and mechanical jointing Part 5: Fitness for purpose of the systemEN 682, Elastomeric seals Materials requirements for seals used in pipes and fittings carrying gas and hydrocarbon fluidsIEC 60529:2001, Degrees of protection provided by enclosures (IP C
34、ode)3 Terms, definitions, symbols and abbreviated termsFor the purposes of this document, the terms, definitions, symbols and abbreviated terms given in ISO 16486-1 and the following apply.3.1electrofusion socket fittingpolyamide (PA-U) fitting which contains one or more integral heating elements th
35、at are capable of transforming electrical energy into heat to realise a fusion joint with a spigot end and/or a pipe3.2electrofusion saddle fittingunplasticized polyamide (PA-U) fitting which contains one or more integral heating elements that are capable of transforming electrical energy into heat
36、to realize fusion onto a pipe3.3tapping teeelectrofusion saddle fitting (top loading or wraparound) which contains an integral cutter, used to cut through the wall of the main pipe, and holds the coupon inside the cutterNOTE The cutter remains in the body of the saddle after installation.3.4branch s
37、addleelectrofusion saddle fitting (top loading or wraparound), which requires an ancillary cutting tool for drilling the hole in the main pipe3.5spigot end fittingunplasticized polyamide (PA-U) fitting where the outside diameter of the spigot length is equal to the nominal outside diameter, dn, of t
38、he corresponding pipeDIN ISO 16486-3:2015-07 7 3.6mechanical fittingfitting for assembling an unplasticized polyamide (PA-U) pipe to another PA-U pipe or any other element of the piping systemNOTE 1 The mechanical fitting can be supplied for field assembly or pre-assembled by the manufacturer and ge
39、nerally includes a compression part to provide pressure integrity, leak-tightness and resistance to end loads. A support sleeve inserted into the pipe bore provides a permanent support for the PA-U pipe to prevent creep in the pipe wall under radial compressive forces.NOTE 2 The metallic parts of th
40、e fitting may be assembled to metallic pipes by screw threads, compression joints, welded or flanged connections. The fitting can allow for either a dismountable or permanently assembled joint. In some cases, the supporting ring may also act as a grip ring.3.7voltage regulationcontrol of energy supp
41、lied, during the fusion process of an electrofusion fitting, by means of the voltage parameter4 Material4.1 PA-U compoundThe fittings shall be made from virgin material.The compound from which the fittings are made shall be in accordance with ISO 16486-1.4.2 Material for unplasticized polyamide part
42、s4.2.1 GeneralThe materials and constituent elements used in making the fitting shall be resistant to the external and internal environments in which they are intended to be useda) during storage,b) under the effect of the fluids being conveyed, andc) taking account of the service environment and op
43、erating conditions.Fittings materials, including elastomers, greases and lubricants in contact with the PA-U pipe, shall not adversely affect pipe performance or initiate stress cracking.4.2.2 Metal partsAll parts susceptible to corrosion shall be adequately protected.When dissimilar metallic materi
44、als are used which may be in contact with moisture, steps shall be taken to avoid galvanic corrosion.Metals and materials produced by corrosion shall not affect the long-term performance of the pipe/fitting.4.2.3 ElastomersElastomeric materials used for the manufacture of seals shall be in accordanc
45、e with EN 682.4.2.4 Other materialsGreases or lubricants shall not exude on to the fusion areas, and shall not affect the long-term performance of the pipe/fitting.DIN ISO 16486-3:2015-07 8 5 General characteristics5.1 AppearanceWhen viewed without magnification, the internal and external surfaces o
46、f the fitting shall be smooth, clean and free from scoring, cavities and other surface defects such as would prevent conformity of the fitting to this part of ISO 16486.5.2 DesignThe design of the fitting shall be such that, when assembling the fitting onto the pipe, spigot ends or other components,
47、 the electrical coils and/or seals and other functional parts (e.g. grippers) are not displaced.5.3 ColourThe fitting shall be either black or yellow.5.4 Electrical characteristics for electrofusion fittingsThe electrical protection to be provided by the system depends on the voltage and the current
48、 used and on the characteristics of the electric power.For voltages greater than 25 V, direct human contact with the energized parts shall not be possible when the fitting is in the fusion cycle during assembly in accordance with the instructions of the manufacturer of the fittings and the assembly
49、equipment, as applicable.This type of fitting is part of an electrical system as defined in IEC 60335-1, IEC 60364-1 and IEC 60449. Protection against direct contact with active parts (live conductors) shall be required in accordance with IEC 60529. This protection is a function of the work site conditions.NOTE See Annex A for examples of typical electrofusion terminal connectors.The surface finish of the terminal pins shall allow a minimum contact resistance in order to satisfy th
