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1、 Reference number ISO 22621-1:2007(E) ISO 2007 INTERNATIONAL STANDARD ISO 22621-1 First edition 2007-11-15 Plastics piping systems for the supply of gaseous fuels for maximum operating pressures up to and including 2 MPa (20 bar) Polyamide (PA) Part 1: General Systmes de canalisations en matires pla
2、stiques pour la distribution de combustibles gazeux pour des pressions maximales de service infrieures ou gales 2 MPa (20 bar) Polyamide (PA) Partie 1: Gnralits Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=lee
3、e, leee Not for Resale, 11/22/2007 19:18:16 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 22621-1:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edite
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6、es. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any m
7、eans, 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. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail cop
8、yrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/22/2007 19:18:16 MSTNo reproduction or networki
9、ng permitted without license from IHS -,-,- ISO 22621-1:2007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope 1 2 Normative references1 3 Terms and definitions .3 3.1 Geometrical characteristics3 3.2 Materials .4 3.3 Material characteristics.4 3.4 Related to servi
10、ce conditions.5 4 Symbols and abbreviated terms 5 4.1 Symbols5 4.2 Abbreviations.6 5 Material .6 5.1 Material of the components6 5.2 Compound6 5.3 Fusion compatibility8 5.4 Classification and designation.9 5.5 Maximum operating pressure MOP .9 Annex A (normative) Assessment of degree of pigment or c
11、arbon black dispersion in polyamide compounds.10 Annex B (normative) Chemical resistance.14 Annex C (normative) Resistance to rapid crack propagation (RCP) Full-scale test (FST).17 Annex D (normative) Preparation of test assemblies by electrofusion.18 Annex E (informative) Design guidance24 Annex F
12、(normative) Hoop stress at burst .27 Bibliography29 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/22/2007 19:18:16 MSTNo reproduction or networking permitted without license from I
13、HS -,-,- ISO 22621-1:2007(E) iv ISO 2007 All rights reserved 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 commi
14、ttees. Each member 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 I
15、nternational Electrotechnical 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 Internationa
16、l Standards adopted 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
17、 subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 22621-1 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 ga
18、seous fuels. ISO 22621 consists of the following parts, under the general title Plastics piping systems for the supply of gaseous fuels for maximum operating pressures up to and including 2 MPa (20 bar) Polyamide (PA): Part 1: General Part 2: Pipes Part 3: Fittings Fitness for purpose of the system
19、is to form the subject of a future part 5. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/22/2007 19:18:16 MSTNo reproduction or networking permitted without license from IHS -,-,-
20、ISO 22621-1:2007(E) ISO 2007 All rights reserved v Introduction As polyamide material is used for piping systems for the supply of gaseous fuels both at low and high pressure, ISO/TC 138/SC 4 experts decided to split the standardization programme into two series of International Standards, with one
21、series (ISO 15439) covering low pressures up to 0,4 MPa (4 bar), and the other (ISO 22621) high pressures up to 2 MPa (20 bar). Thin wall thickness pipes and solvent cement joints are used typically for pressures up to 0,4 MPa (4 bar), while thicker wall thickness pipes and butt fusion, electrofusio
22、n and mechanical joints are typically used for pressures up to 2 MPa (20 bar). 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,
23、 solvent cement joints must not be used for jointing for high pressure piping systems. 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. Copyright International Organization for Standardization Provided by IHS
24、under license with ISO Licensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/22/2007 19:18:16 MSTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employe
25、es/1111111001, User=leee, leee Not for Resale, 11/22/2007 19:18:16 MSTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 22621-1:2007(E) ISO 2007 All rights reserved 1 Plastics piping systems for the supply of gaseous fuels for maximum operating pressur
26、es up to and including 2 MPa (20 bar) Polyamide (PA) Part 1: General 1 Scope This part of ISO 22621 specifies the general properties of polyamide (PA) compounds for the manufacture of pipes, fittings and valves made from these compounds, intended to be buried and used for the supply of gaseous fuels
27、 at maximum operating pressures (MOP) up to and including 20 bar1). It also specifies the test parameters for the test methods to which it refers. This part of ISO 22621 establishes a calculation and design scheme on which to base the MOP of a piping system. 2 Normative references The following refe
28、renced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 179-1:2000, Plastics Determination of Charpy impact properties
29、Part 1: Non-instrumented impact test ISO 291, Plastics Standard atmospheres for conditioning and testing ISO 307, Plastics Polyamides Determination of viscosity number ISO 472, Plastics Vocabulary ISO 527-1, Plastics Determination of tensile properties Part 1: General principles ISO 527-2, Plastics
30、Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics ISO 1043-1, Plastics Symbols and abbreviated terms Part 1: Basic polymers and their special characteristics ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determina
31、tion of the resistance to internal pressure Part 1: General method 1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/22/2007 19:18:16 MSTNo
32、 reproduction or networking permitted without license from IHS -,-,- ISO 22621-1:2007(E) 2 ISO 2007 All rights reserved ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparation of pipe test pieces
33、ISO 1183-1, Plastics Methods for determining the density of non-cellular plastics Part 1: Immersion method, liquid pyknometer and titration method ISO 1183-2, Plastics Methods for determining the density of non-cellular plastics Part 2: Density gradient column method ISO 1874-1, Plastics Polyamides
34、(PA) moulding and extrusion materials Part 1: Designation ISO 1874-2, Plastics Polyamides (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, Thermopla
35、stics pipes Determination of tensile properties 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 s
36、pecification ISO 9080, Plastics piping and ducting 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 and designation Overall service
37、 (design) coefficient ISO 13477, Thermoplastics pipes for the conveyance of fluids Determination of resistance to rapid crack propagation (RCP) Small-scale steady-state test (S4 test) ISO 13478:1997, Thermoplastics pipes for the conveyance of fluids Determination of resistance to rapid crack propaga
38、tion (RCP) Full scale test (FST) ISO 13479, Polyolefin pipes for the conveyance of fluids Determination of resistance to crack propagation Test method for slow crack growth on notched pipes (notch test) ISO 13954, Plastics pipes and fittings Peel decohesion test for polyethylene (PE) electrofusion a
39、ssemblies of nominal outside diameter greater than or equal to 90 mm ISO 15512:2), Plastics Determination of water content ISO 16871, Plastics piping and ducting systems Plastics pipes and fittings Method for exposure to direct (natural) weathering 2) To be published. (Revision of ISO 15512:1999) Co
40、pyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/22/2007 19:18:16 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 22621-1:2007(E) ISO 2007 All rights reser
41、ved 3 3 Terms and definitions 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 dn specified outside diameter of a component, which is identical to the min
42、imum mean outside diameter, dem,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 de outside diameter measured through the cross-section at any point on a pipe, or the spigot end of
43、 a fitting, rounded up to the nearest 0,1 mm 3.1.3 mean outside diameter dem measured length of the outer circumference of a pipe, or the spigot end of a fitting, divided by ( 3,142), rounded up to the nearest 0,1 mm 3.1.4 minimum mean outside diameter dem,min minimum value for the mean outside diam
44、eter as specified for a given nominal size 3.1.5 maximum mean outside diameter dem,max maximum value for the mean outside diameter as specified for a given nominal size 3.1.6 out-of-roundness pipe or fitting difference between the measured maximum outside diameter and the measured minimum outside di
45、ameter 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 measured minimum inside diameter in the same cross-sectional plane of a socket 3.1.8 nominal wall thickness en wall thickness, i
46、n millimetres, corresponding to the minimum wall thickness, emin 3.1.9 wall thickness at any point e measured wall thickness at any point around the circumference of a component, rounded up to the nearest 0,1 mm Copyright International Organization for Standardization Provided by IHS under license w
47、ith ISO Licensee=IHS Employees/1111111001, User=leee, leee Not for Resale, 11/22/2007 19:18:16 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 22621-1:2007(E) 4 ISO 2007 All rights reserved 3.1.10 minimum wall thickness at any point emin minimum value for the wall thick
48、ness at any point around the circumference of a component, as specified 3.1.11 standard dimension ratio SDR ratio of the nominal outside diameter, dn, of a pipe to its nominal wall thickness, en 3.2 Materials 3.2.1 compound homogenous mixture of base polymer (PA) and additives, i.e. antioxidants, pigments, UV stabilisers a