DIN ISO 16486-6-2015 Plastics piping systems for the supply of gaseous fuels - Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing - Part 6 C.pdf

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 2

2、3.040.01; 75.200!%D9/“2332212www.din.deDDIN ISO 16486-6Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing andmechanical jointing Part 6: Code of practice for design, handling and installation(ISO 16486-6:2012),English translatio

3、n of DIN ISO 16486-6:2015-07Kunststoff-Rohrleitungssysteme fr die Gasversorgung Rohrleitungssysteme aus weichmacherfreiem Polyamid (PA-U) mit Schweiverbindungenund mechanischen Verbindungen Teil 6: Leitfaden fr Planung, Handhabung und Installation (ISO 16486-6:2012),Englische bersetzung von DIN ISO

4、16486-6:2015-07Systmes de canalisations en matires plastiques pour la distribution de combustiblesgazeux Systmes de canalisations en polyamide non plastifi (PA-U) avec assemblages parsoudage et assemblages mcaniques Partie 6: Code de pratique pour la conception, la manutention et linstallation(ISO 1

5、6486-6:2012),Traduction anglaise de DIN ISO 16486-6:2015-07www.beuth.deDocument comprises 25 pagesIn case of doubt, the German-language original shall be considered authoritative.06.15A comma is used as the decimal marker. Contents Page National foreword 3Introduction 51 Scope 62 Normative reference

6、s . 63 Terms and definitions . 74 Symbols and abbreviated terms . 75 Design . 85.1 General . 85.2 Materials, components and jointing equipment 85.3 Maximum operating pressure 85.4 Assembly techniques . 95.5 Squeeze-off properties . 96 Installation . 96.1 Jointing procedure 96.2 Training 106.3 Heated

7、-tool fusion jointing . 106.4 Electrofusion jointing . 146.5 Laying .177 Storage, handling and transport .197.1 General .197.2 Storage .197.3 Handling .207.4 Transport .218 Quality control 218.1 General .218.2 Inspection prior to laying 218.3 Inspection during laying 22Annex A (normative) Derating c

8、oefficients for operating temperatures 24Bibliography .25National Annex NA (informative) Bibliography . 42IDIN ISO 16486-6:2015-07National foreword This document (ISO 16486-6:2012) has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids”,

9、Subcommittee SC 4 “Plastic pipes and fittings for the supply of gaseous fuels”. The responsible 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. A

10、ttention 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 responsible for identifying any or all such patent rights. DIN ISO 16486 consists of the following parts, under the general title Plastics piping syst

11、ems 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 the Internationa

12、l 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 16486-3 DIN ISO 16486-3 ISO

13、 16486-5 DIN ISO 16486-5 3IDIN ISO 16486-6:2015-07National 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

14、 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 systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mec

15、hanical jointing Part 3: Fittings DIN ISO 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 system 4IDIN ISO 16486-6:2015-07IntroductionThin wall thickness unp

16、lasticized 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.For technical and safety reasons, it is not possible to mix the components of

17、 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 high pressure piping systems.So for the time being, the standardization programme dealing with unpl

18、asticized 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 solvent cement jointing and the other (ISO 16486) the components of which are co

19、nnected 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 series applicable to PA-U piping systems.A similar series (ISO 17135) for fusion and mechanically joi

20、nted plasticized polyamide (PA-P) piping systems is in preparation.5Plastics 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 installationIDIN ISO 16486-6:2015-0

21、71 ScopeThis part of ISO 16486 specifies a code of practice dealing with unplasticized polyamide (PA-U) piping systems, intended to be buried outside buildings and used for the supply of gaseous fuels. It addresses the common basic principles for gas supply systems.More detailed national standards o

22、r codes of practice might exist in the ISO member countries. This part of ISO 16486 is intended to be applied in association with those national standards or codes of practice related to the above-mentioned basic principles.It is applicable to mains and service lines, the components of which are pre

23、pared for jointing by scraping and/or machining, and gives instructions for the design, storage, handling, transportation, laying conditions and fusion quality control of PA-U pipes and fittings up to and including 250 mm outside diameter, as well as subsequent joint testing, backfilling, pipe syste

24、m testing, commissioning and decommissioning.The jointing methods covered by this part of ISO 16486 are butt fusion jointing and electrofusion jointing.No special precautions are necessary for areas exposed to the influence of mining and earthquakes other than those precautions mentioned in this par

25、t of ISO 16486.It is the responsibility of users of this part of ISO 16486 to take existing and new national regulations into account.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated r

26、eferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications Classification, designation and design coefficientISO 12176-1, Plas

27、tics pipes and fittings Equipment for fusion jointing polyethylene systems Part 1: Butt fusionISO 12176-2, Plastics pipes and fittings Equipment for fusion jointing polyethylene systems Part 2: ElectrofusionISO 12176-3, Plastics pipes and fittings Equipment for fusion jointing polyethylene systems P

28、art 3: Operators badgeEN 12327, Gas supply systems Pressure testing, commissioning and decommissioning procedures Functional requirementsISO 16486-1, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Par

29、t 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: Pipes6IDIN ISO 16486-6:2015-07ISO 16486-3, Plastics piping systems for the supply of gaseous fuels Unplasticized polyami

30、de (PA-U) piping systems with fusion jointing and mechanical 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 system3 Terms and d

31、efinitionsFor the purposes of this document, the terms, definitions, symbols and abbreviated terms given in ISO 16486-1 and ISO 16486-5 and the following apply.3.1butt fusion machine pressurepressure indicated on the manometer or on a pressure display on a butt fusion machine, giving an indication o

32、f the interface force applied to the pipe or fitting ends3.2clearanceshortest distance between the outer limits of two objects3.3drag resistancefrictional resistance due to the weight of the length of pipe fixed in the moveable clamp at the point at which movement of the moveable clamp is initiated

33、(peak drag), or the friction occurring during movement (dynamic drag)3.4electrofusion control boxunit implementing the output fusion parameters of voltage or current and time or energy to execute the fusion cycle as specified by the electrofusion fitting manufacturer3.5frictional losses in the butt

34、fusion machineforce necessary to overcome friction in the whole mechanism of a butt fusion machine3.6interface forceforce between the fusion surfaces of the pipe(s) and/or fitting(s) during the fusion cycle, as specified in the fusion diagram3.7operatorperson authorized to build PA-U systems from pi

35、pes and/or fittings, based on a written procedure agreed by the pipeline operator3.8pipeline operatorprivate or public organization authorized to design, construct or operate and maintain a gas supply system3.9soil coververtical distance between the top of a buried pipe and the normal surface after

36、finishing work4 Symbols and abbreviated termsC design coefficientCRS categorized required strengthde outside diameter of pipe at any point7IDIN ISO 16486-6:2015-07DF derating coefficientMOP maximum operating pressureMRS minimum required strengthRCP rapid crack propagationSDR standard dimension ratio

37、5 Design5.1 GeneralA written laying procedure, authorized by the pipeline operator, shall be made available prior to the construction of a pipeline. The laying procedure shall include specification of the jointing procedure, the pipe and fitting materials to be used, the trenching and backfilling re

38、quirements, the pressure testing and commissioning requirements, and the data to be collected for the traceability system.The selection of materials, SDR series, dimensions and assembling techniques shall be the responsibility of the pipeline operator.There are two SDR series in common use for gas s

39、upply systems: SDR 17 and SDR 11. Other SDR series can also be used, such as SDR 26 for renovation.The training and the level of skill of the operator shall be in accordance with the requirements of the jointing procedures.General guidelines for supervision and quality control are given in Clause 8.

40、5.2 Materials, components and jointing equipmentThe PA-U materials and components used shall conform to ISO 16486-1, ISO 16486-2 and ISO 16486-3, as relevant.Other components not covered by the above-mentioned parts of ISO 16486 shall conform to the relevant national standards.If pipes and fittings

41、are to be stored outside, requirements on maximum storage time shall be given in the laying procedure. PA-U materials shall be stabilized to give protection against a UV radiation level of 3,5 GJ/m2. It is desirable that national bodies give recommendations for allowed storage times in their countri

42、es.The fusion equipment used for the construction of the pipeline shall comply with the requirements of ISO 12176-1 or ISO 12176-2. If the operation of the fusion equipment requires an operators badge, the badge shall conform to ISO 12176-3.5.3 Maximum operating pressureThe maximum operating pressur

43、e (MOP) of the system shall be selected by the pipeline operator on the basis of the gas supply system operating requirements and the materials used. The MOP of a PA-U system depends upon the type of resin used (the MRS), the pipe SDR series and the service conditions, and is limited by the design c

44、oefficient, C, and the RCP criteria.For greater flexibility in the use of the MRS, the CRS,tis introduced, where the temperature and the lifetime t may differentiate from the usual values of 20 C and 50 years. The policy retains the well-established MRS basis for the classification of polyamide mate

45、rials in accordance with ISO 12162. The categorized required strength, CRS,t, is defined in ISO 12162.8IDIN ISO 16486-6:2015-07The design coefficient, C, for thermoplastics materials is specified in ISO 12162. This coefficient is used to calculate the MOP of the pipeline. C shall be greater than or

46、equal to 2 for PA-U pipeline systems for natural gas.MOPMRSSDR=()201CDF(1)orMOPCRSSDR=()201,tC(2)The derating coefficient, DF, is a coefficient used in the calculation of the MOP which takes into account the influence of the operating temperature. Derating coefficients for various operating temperat

47、ures are given in Annex A.The ratio of the critical RCP pressure to the MOP shall be 1,5 at the minimum operating temperature. The critical RCP pressure is dependent on temperature, pipe size and type of PA-U material used. It is defined in this subclause in accordance with ISO 16486-1, Table 1, bas

48、ed on the full-scale test method in accordance with ISO 13478 (see Table footnote e).Where the pipe temperature decreases below 0 C, the pc/MOP ratio shall be recalculated using a pc(critical pressure) value determined from the minimum expected operating temperature of the pipe. If necessary, the va

49、lue of the MOP shall be reduced so as to maintain the pc/MOP ratio at a value 1,5.5.4 Assembly techniquesJointing procedures may vary depending upon the pipe size used.Fusion is the preferred jointing method. Preference shall be given to butt fusion and electrofusion.Components made from PA-U 11 shall be heat fusion jointed only to components made from PA-U 11.Components made from PA-U 12 shall be heat fusion jointed only to components made from PA-U 12.Components made from PA-U are n