1、 ISO 2012 Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing Part 1: General Systmes de canalisations en matires plastiques pour la distribution de combustibles gazeux Systmes de canalisations en polyamid
2、e non plastifi (PA-U) avec assemblages par soudage et assemblages mcaniques Partie 1: Gnralits INTERNATIONAL STANDARD ISO 16486-1 First edition 2012-06-01 Reference number ISO 16486-1:2012(E) ISO 16486-1:2012(E) ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2012 All rights reserve
3、d. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester
4、. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ISO 16486-1:2012(E) ISO 2012 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3
5、T erms and definitions . 2 3.1 Geometrical characteristics . 2 3.2 Materials . 3 3.3 Material characteristics . 4 3.4 Related to service conditions 4 4 Symbols and abbreviated terms . 5 4.1 Symbols . 5 4.2 Abbreviated terms . 5 5 Material . 5 5.1 Material of the components 5 5.2 Compound . 5 5.3 Fus
6、ion compatibility . 8 5.4 Classification and designation 8 5.5 Maximum operating pressure (MOP) . 9 Annex A (normative) Assessment of degree of pigment or carbon black dispersion in unplasticized polyamide compounds 10 Annex B (normative) Chemical resistance 14 Annex C (normative) Hoop stress at bur
7、st 17 Bibliography .19 ISO 16486-1:2012(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member
8、 body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Elect
9、rotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopte
10、d by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
11、 rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 16486-1 was 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. This
12、first edition of ISO 16486-1 cancels and replaces the first edition of ISO 22621-1:2007 which has been technically revised. 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 fu
13、sion 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 iv ISO 2012 All rights reserved ISO 16486-1:2012(E) Introduction Thin wall thickness unplasticized polyamide
14、(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 the two types of pi
15、ping 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 unplasticized polyamide
16、 (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 connected by fusion j
17、ointing 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 jointed plasticized p
18、olyamide (PA-P) piping systems is in preparation. NOTE A list of standards related to polyamide pipes and fittings for the supply of gas is given in the Bibliography. See References 6 to 9. ISO 2012 All rights reserved v Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide
19、 (PA-U) piping systems with fusion jointing and mechanical jointing Part 1: General 1 Scope This part of ISO 16486 specifies the general properties of unplasticized polyamide (PA-U) compounds for the manufacture of pipes, fittings and valves made from these compounds, intended to be buried and used
20、for the supply of gaseous fuels. 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. This part of ISO 16486 establishes a calculation and des
21、ign scheme on which to base the maximum operating pressure (MOP) of a PA-U piping system. 2 Normative references The 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.
22、For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 179-1:2010, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact test ISO 291, Plastics Standard atmospheres for conditioning and testing ISO 307, Plastics Poly
23、amides Determination of viscosity number ISO 472, Plastics Vocabulary ISO 527-1, Plastics Determination of tensile properties Part 1: General principles ISO 527-2, Plastics Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics ISO 1043-1, Plastics Symbols an
24、d abbreviated terms Part 1: Basic polymers and their special characteristics ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General method ISO 1167-2, Thermoplastics pipes, fittings and assemblies fo
25、r the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparation of pipe test pieces ISO 1183-1, Plastics Methods for determining the density of non-cellular plastics Part 1: Immersion method, liquid pyknometer method and titration method ISO 1183-2, Plastics Metho
26、ds for determining the density of non-cellular plastics Part 2: Density gradient column method ISO 1874-1, Plastics Polyamide (PA) moulding and extrusion materials Part 1: Designation system and basis for specification INTERNATIONAL STANDARD ISO 16486-1:2012(E) ISO 2012 All rights reserved 1 ISO 164
27、86-1:2012(E) ISO 1874-2, Plastics Polyamide (PA) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties ISO 2505, Thermoplastics pipes Longitudinal reversion Test method and parameters ISO 6259-1, Thermoplastics pipes Determination of tensile propertie
28、s Part 1: General test method ISO 6259-3, Thermoplastics pipes Determination of tensile properties Part 3: Polyolefin pipes ISO 6964, Polyolefin pipes and fittings Determination of carbon black content by calcination and pyrolysis Test method and basic specification ISO 9080, Plastics piping and duc
29、ting systems Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications Classification, designation and design coefficient ISO 13477, Thermoplastics pipes for the c
30、onveyance of fluids Determination of resistance to rapid crack propagation (RCP) Small-scale steady-state test (S4 test) ISO 13478:2007, Thermoplastics pipes for the conveyance of fluids Determination of resistance to rapid crack propagation (RCP) Full-scale test (FST) ISO 13479, Polyolefin pipes fo
31、r the conveyance of fluids Determination of resistance to crack propagation Test method for slow crack growth on notched pipes ISO 13954, Plastics pipes and fittings Peel decohesion test for polyethylene (PE) electrofusion assemblies of nominal outside diameter greater than or equal to 90 mm ISO 155
32、12, Plastics Determination of water content 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 ISO 16871, Plastics piping and ducting systems Plastic
33、s pipes and fittings Method for exposure to direct (natural) weathering 3 T erms and definitio ns For the purposes of this document, the terms and definitions given in ISO 472, ISO 1043-1 and ISO 1874-1, and the following apply. 3.1 Geometrical characteristics 3.1.1 nominal outside diameter d n spec
34、ified outside diameter of a component, which is identical to the minimum mean outside diameter, d em,min , in millimetres NOTE The nominal inside diameter of a socket is equal to the nominal outside diameter of the corresponding pipe. 3.1.2 outside diameter at any point d e outside diameter measured
35、 through the cross-section at any point on a pipe, or the spigot end of a fitting, rounded up to the nearest 0,1 mm 2 ISO 2012 All rights reserved ISO 16486-1:2012(E) 3.1.3 mean outside diameter d em measured length of the outer circumference of a pipe, or the spigot end of a fitting, divided by ( 3
36、,142), rounded up to the nearest 0,1 mm 3.1.4 minimum mean outside diameter d em,min minimum value for the mean outside diameter as specified for a given nominal size 3.1.5 maximum mean outside diameter d em,max maximum value for the mean outside diameter as specified for a given nominal size 3.1.6
37、out-of-roundness pipe or fitting difference between the measured maximum outside diameter and the measured minimum outside diameter in the same cross-sectional plane of a pipe or spigot end of a fitting 3.1.7 out-of-roundness socket difference between the measured maximum inside diameter and the mea
38、sured minimum inside diameter in the same cross-sectional plane of a socket 3.1.8 nominal wall thickness e n wall thickness, in millimetres, corresponding to the minimum wall thickness, e min 3.1.9 wall thickness at any point e measured wall thickness at any point around the circumference of a compo
39、nent, rounded up to the nearest 0,1 mm 3.1.10 minimum wall thickness at any point e min minimum value for the wall thickness at any point around the circumference of a component, as specified 3.1.11 standard dimension ratio SDR ratio of the nominal outside diameter, d n , of a pipe to its nominal wa
40、ll thickness, e n 3.2 Materials 3.2.1 compound homogenous mixture of base polymer (PA-U) and additives, i.e. antioxidants, pigments, UV stabilisers and others, at a dosage level necessary for the processing and use of components conforming to the requirements of this part of ISO 16486 3.2.2 virgin m
41、aterial material in a form such as granules or powder that has not been previously processed other than for compounding and to which no rework material or recyclable material has been added ISO 2012 All rights reserved 3 ISO 16486-1:2012(E) 3.2.3 rework material material from a manufacturers own pro
42、duction (of compounds and of pipes, fittings or valves) that has been reground or pelletized for reuse by that same manufacturer 3.3 Material characteristics 3.3.1 l ow e r confid enc e li mi t of the predic t ed h y dr ost at ic st reng t h LPL quantity, with the dimensions of stress, which represe
43、nts the 97,5 % lower confidence limit of the predicted hydrostatic strength at a temperature and time t NOTE 1 The quantity is expressed in megapascals (MPa). NOTE 2 Temperature, , is expressed in degrees Celsius and time, t, is expressed in years. 3.3.2 minimum required strength MRS value of LPLat
44、20 C and 50 years, rounded down to the next smaller value of the R10 series or the R20 series NOTE The R10 series conforms to ISO 3 1and the R20 series conforms to ISO 497 2 . 3.3.3 categorized required strength at temperature and time t CRS ,t value of LPLat temperature and time t, rounded down to
45、the next smaller value of the R10 series or the R20 series NOTE 1 CRS ,tat 20 C and 50 years equals MRS. NOTE 2 Temperature, , is expressed in degrees Celsius and time, t, is expressed in years. NOTE 3 The R10 series conforms to ISO 3 1and the R20 series conforms to ISO 497 2 . 3.3.4 d e si g n co e
46、f fici ent C coefficient with a value greater than 1, which takes into consideration service conditions as well as properties of the components of a piping system other than those represented in the lower confidence limit 3.3.5 design stress s s, ,tstress derived by dividing the MRS or CRS ,tby the
47、design coefficient C, i.e. s= MRS/C, or s, ,t= CRS ,t /C 3.4 Related to service conditions 3.4.1 gaseous fuel any fuel which is in a gaseous state at a temperature of 15 C, at a pressure of one bar (0,1 MPa) 3.4.2 maximum operating pressure MOP maximum effective pressure of the gas in the piping sys
48、tem, expressed in bar, which is allowed in continuous use NOTE The MOP takes into account the physical and the mechanical characteristics of the components of a piping system and the influence of the gas on these characteristics. 4 ISO 2012 All rights reserved ISO 16486-1:2012(E) 4 Symbols and abbre
49、viated terms 4.1 Symbols C design coefficient d eoutside diameter at any point d em mean outside diameter d em,max maximum mean outside diameter d em,minminimum mean outside diameter d nnominal outside diameter e wall thickness at any point e minminimum wall thickness at any point e nnominal wall thickness sdesign stress LPLlower confidence limit of the predicted hydrostatic s
