1、November 2016 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 23.040.01; 75.200!%YV“2585451ww
2、w.din.deDIN ISO 16486-4Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PAU) piping systems with fusion jointing and mechanical jointing Part 4: Valves (ISO 164864:2016),English translation of DIN ISO 16486-4:2016-11KunststoffRohrleitungssysteme fr die Gasversorgung R
3、ohrleitungssysteme aus weichmacherfreiem Polyamid (PAU) mit Schweiverbindungen und mechanischen Verbindungen Teil 4: Armaturen (ISO 164864:2016),Englische bersetzung von DIN ISO 16486-4:2016-11Systmes de canalisations en matires plastiques pour la distribution de combustibles gazeux Systmes de canal
4、isations en polyamide non plastifi (PAU) avec assemblages par soudage etassemblages mcaniques Partie 4: Robinets (ISO 164864:2016),Traduction anglaise de DIN ISO 16486-4:2016-11www.beuth.deDocument comprises 23 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original sh
5、all be considered authoritative.10.16 A comma is used as the decimal marker. Introduction 61Scope. 72 Normative references 73 Terms and definitions . 84 Material 94.1 PA-U compound 94.2 Material for non-unplasticized polyamide parts . 94.2.1 General 94.2.2 Metal parts . 104.2.3 Elastomers 104.2.4 Ot
6、her materials 105 General characteristics .105.1 Appearance of the valve . 105.2 Colour . 105.3 Design 105.3.1 General. 105.3.2 Valve body . 105.3.3 Operating device . 115.3.4 Seals . 115.4 Fusion compatibility . 116 Geometrical characteristics .116.1 General 116.2 Measurement of dimensions 116.3 Di
7、mensions of spigot ends for valves . 116.4 Dimensions of valves with electrofusion sockets . 116.5 Dimensions of the operating device 127 Mechanical characteristics of assembled valves 127.1 General 127.2 Conditioning . 127.3 Requirements 128 Physical characteristics 178.1 Conditioning .178.2 Requir
8、ement 179 Performance requirements 1710 Marking .1810.1 General 1810.2 Minimum required marking of valves 1810.3 Additional information required on valve or label .1810.4 Fusion system recognition .18Contents PageNational foreword 4National Annex NA (informative) Bibliography 52DIN ISO 16486-4:2016-
9、11 11 Packaging 19Annex A (normative) Determination of the leaktightness of seat and packing 20Annex B (normative) Test method for leaktightness and ease of operation after tensile loading .21Bibliography .233DIN ISO 16486-4:2016-11 National foreword This document (ISO 16486-4:2016) has been prepare
10、d by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 7 “Valves and auxiliary equipment of plastics materials. The responsible German body involved in its preparation was DIN-Normenausschuss Kunststoffe (DIN Standards Committee Plastics
11、), 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 shall not be held responsible for identifying any or all such patent rights. DIN ISO 164
12、86 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 Part 3: Fittings Part 4: Valves (the present standard) Part 5
13、: Fitness for purpose of the system Part 6: Code of practice for design, handling and installation For 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 bel
14、ow 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 ISO 16486-5 DIN ISO 16486-5 ISO 16486-6 DIN ISO 16486-6 4DIN ISO 16486-4:2016-11 National Annex NA (informative) Bibliography DIN ISO 16486-1, Plastics piping systems for the supply of
15、 gaseous fuels Unplasticized polyamide (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
16、DIN ISO 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: Fittings DIN ISO 16486-5, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems
17、with fusion jointing and mechanical jointing Part 5: Fitness for purpose of the system DIN ISO 16486-6, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 6: Code of practice for design, handling and
18、 installation 5DIN ISO 16486-4:2016-11 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 for high pressures.Fo
19、r 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 shall not be used for jointing for high pressure piping sy
20、stems.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 are connected by solv
21、ent 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 ISO 17467 series and ISO 16486 series in one single series applicable to PA-U piping
22、 systems.6DIN ISO 16486-4:2016-11 Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 4: Valves1 ScopeThis part of ISO 16486 specifies the characteristics of valves made from unplasticized polyamide (
23、PA-U) in accordance with ISO 16486-1, intended to be buried and used for the supply of gaseous fuels.Valves made from other material than unplasticized polyamide designed for the supply of gaseous fuels conforming to the relevant standards are permitted to be used in PA-U piping system according to
24、ISO 16486 provided they have relevant PA-U connections for butt fusion or electrofusion ends (see ISO 16486-3). The component, i.e. the complete valve, shall fulfil the requirements of this part of ISO 16486.It also specifies the test parameters for the test methods referred to in this part of ISO 1
25、6486.It is applicable to bi-directional valves with spigot end or electrofusion socket intended to be jointed with PA-U pipes conforming to ISO 16486-2 without any fittings or with PA-U fittings conforming to ISO 16486-3.This part of ISO 16486 covers valves for pipes with a nominal outside diameter,
26、 dn, 250 mm.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 (includin
27、g 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 Part
28、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 3127, Thermoplastics pipe
29、s Determination of resistance to external blows Round-the-clock methodISO 8233, Thermoplastics valves Torque Test methodISO 9393-1:2004, Thermoplastics valves for industrial applications Pressure test methods and requirements Part 1: GeneralISO 16010, Elastomeric seals Material requirements for seal
30、s used in pipes and fittings carrying gaseous fuels and hydrocarbon fluidsISO 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: General7DIN ISO 16486-4:2016-11 ISO 16486-2, Plastics pipi
31、ng systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 2: PipesISO 16486-3:2012, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanic
32、al jointing Part 3: FittingsISO 16486-5, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 5: Fitness for purpose of the systemISO 17778, Plastics piping systems Fittings, valves and ancillaries Det
33、ermination of gaseous flow rate/pressure drop relationshipsEN 736-1, Valves Terminology Part 1: Definition of types of valvesEN 736-2, Valves Terminology Part 2: Definition of components of valvesEN 1680, Plastics piping systems Valves for polyethylene (PE) piping systems Test method for leaktightne
34、ss under and after bending applied to the operating mechanismsEN 1704, Plastics piping systems Thermoplastics valves Test method for the integrity of a valve after temperature cycling under bendingEN 1705, Plastics piping systems Thermoplastics valves Test method for the integrity of a valve after a
35、n external blowEN 12100, Plastics piping systems Polyethylene (PE) valves Test method for resistance to bending between supportsEN 12119, Plastics piping systems Polyethylene (PE) valves Test method for resistance to thermal cycling3 Terms and definitionsFor the purposes of this document, the terms
36、and definitions given in ISO 16486-1, EN 736-1, EN 736-2 and the following apply.3.1external leaktightnessleaktightness (3.3) of the valve body (3.6) enveloping the space containing the gas, with respect tothe atmosphere3.2internal leaktightnessleaktightness (3.3) between the inlet and the outlet of
37、 the valve, with the valve in the closed position3.3leaktightness testtest for both of the following characteristics:a) the internal leaktightness (3.2) of a valves closing seat when closed and pressurized from either side;b) the external leaktightness (3.1) of a valve when half open3.4initiating to
38、rquetorque required to initiate movement of the obturator3.5running torquetorque required to achieve full opening or closing of the valve at maximum allowable operating pressureN1)N1)National footnote: The definition of “valve body is given in 3.7, not in 3.6 as erroneously stated. 98DIN ISO 16486-4
39、:2016-11 3.7valve bodymain part of a valve which contains the obturating device (closing element, the seat, the packing seals and the operating stop), as applicable and provides the terminal ends for connection to the PA-U pipe/fittings3.8operating devicepart of a valve for connection with the opera
40、ting key which allows the opening and the closing of the valve3.9 Terms relating to design3.9.1full bore valvevalve with a flow section equal to or greater than 80 % of the section corresponding to the nominal inside diameter of the body end portSOURCE: EN 736-33.9.2clearway valvevalve designed to h
41、ave an unobstructed flow way, which allows for the passage of a theoretical sphere with a diameter that is not less than the nominal inside diameter of the body end portSOURCE: EN 736-33.9.3reduced bore valvevalve with a flow section equal to or greater than 36 % of the section corresponding to the
42、nominal inside diameter of the body end port and which does not correspond to the full bore valve (3.9.1)4 Material4.1 PA-U compoundThe valves shall be made from virgin material.The compound from which the valves are made shall be in accordance with ISO 16486-1.4.2 Material for non-unplasticized pol
43、yamide parts4.2.1 GeneralThe materials and constituent elements used in making the valve 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 environme
44、nt and operating conditions.3.6leakageemission of gas from a valve body (3.6) or any component of a valveN2)National footnote: The definition of “valve body is given in 3.7, not in 3.6 as erroneously stated. N2)9DIN ISO 16486-4:2016-11 Metal valve bodies for PA-U piping systems up to 20 bar should c
45、onform to the relevant standard of ISO/TC 153”Valves”.4.2.2 Metal partsAll parts susceptible to corrosion shall be adequately protected, providing this is necessary for the durability and function of the system.When dissimilar metallic materials are used which may be in contact with moisture, steps
46、shall be taken to avoid the possibility of galvanic corrosion.4.2.3 ElastomersElastomeric materials used for the manufacture of seals shall be in accordance with ISO 16010.Other sealing materials are permitted if proven suitable for gas service.4.2.4 Other materialsGreases and lubricants shall not e
47、xude on to the fusion areas and shall not affect the long-term performance of the pipe/valve.Other materials conforming to 4.2.1 may be used provided that it is proven that the valves conform to this part of ISO 16486.5 General characteristics5.1 Appearance of the valveWhen viewed without magnificat
48、ion, the internal and external surfaces of valves shall be smooth, clean, and free from scoring, cavities, or other surface defects to an extent that would prevent conformity to this part of ISO 16486.No component of the valve shall show any signs of damage, scratches, pitting, bubbles, blisters, in
49、clusions, or cracks to an extent that would prevent conformity of the valves to this part of ISO 16486.5.2 ColourThe colour of the PA-U parts of valves shall be either black or yellow.5.3 Design5.3.1 GeneralThe design of the valve shall be such that, when assembling the valve onto the pipe or other components, the electrical coils, if any, and/or seals or any other
