1、 Reference number ISO 14531-3:2010(E) ISO 2010INTERNATIONAL STANDARD ISO 14531-3 Second edition 2010-12-01 Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems for the conveyance of gaseous fuels Metric series Specifications Part 3: Fittings for mechanical jointing (including PE-
2、X/metal transitions) Tubes et raccords en matires plastiques Systmes de tubes en polythylne rticul (PE-X) pour le transport de combustibles gazeux Srie mtrique Spcifications Partie 3: Raccords pour assemblage mcanique (y compris transitions PE-X/mtal) ISO 14531-3:2010(E) PDF disclaimer This PDF file
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5、ation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. 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 2
6、010 All rights reserved. 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 co
7、untry 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 copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedISO 14531-3:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv In
8、troduction.v 1 Scope1 2 Normative references2 3 Terms and definitions .3 4 Materials .3 4.1 General .3 4.2 Strength4 4.3 Chemical resistance4 4.4 Lubricants 5 4.5 Reprocessable (re-work) material5 5 Fittings5 5.1 Design.5 5.2 Appearance 6 5.3 Dimensions 7 5.4 Mechanical performance 7 5.5 Validation
9、of fitting design and design pressure DP F .7 5.6 Performance requirements for fittings in conformity with ISO 10838 .9 6 Elastomeric seals 9 7 Marking.9 7.1 Legibility.9 7.2 Damage.9 7.3 Minimum marking requirements10 7.4 Labels .10 Annex A (normative) Resistance to gas constituents 11 Annex B (nor
10、mative) Method of test of the integrity of a fitting after an external blow 12 Annex C (normative) Constant-strain thermal-cycling test14 Annex D (informative) Validation of fitting design pressure DP Fat 20 C (plastic bodied fittings) .16 Annex E (normative) Validation of fitting design pressure DP
11、 Fat 20 C (metal bodied fittings) .18 ISO 14531-3:2010(E) iv ISO 2010 All rights reservedForeword 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
12、 through ISO technical committees. 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 col
13、laborates closely with the International 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 S
14、tandards. Draft International 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
15、 of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14531-3 was prepared by Technical Committee ISO/TC 138, Plastic pipes, fittings and valves for the transport of fluids, Subcommittee SC 4, Plastic pipes and fit
16、tings for the supply of gaseous fuels. This second edition cancels and replaces the first edition (ISO 14531-3:2006), of which it constitutes a minor revision. ISO 14531 consists of the following parts, under the general title Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems
17、for the conveyance of gaseous fuels Metric series Specifications: Part 1: Pipes Part 2: Fittings for heat-fusion jointing Part 3: Fittings for mechanical jointing (including PE-X/metal transitions) Part 4: System design and installation guidelines ISO 14531-3:2010(E) ISO 2010 All rights reserved vIn
18、troduction Further to the publication of International Standards for crosslinked polyethylene (PE-X) hot-water pipes, it has become evident that the properties of PE-X, in particular its high fracture resistance and a recently established socket and saddle fusion-jointing capability, render it suita
19、ble for use in high-performance gas-distribution systems. The philosophy of ISO 14531 is to provide the basis for the introduction of PE-X gas pipe systems by the specification of a performance envelope beyond that covered by existing PE standards in order to take its application into regimes of hig
20、her operating pressures and extremes of operating temperature. This part of ISO 14531 is therefore one part of a four-part system standard covering pipes, fittings for heat- fusion jointing, fittings for mechanical jointing and design and installation guidelines. The content is suitable for use by p
21、rocurement authorities and distribution engineers responsible for the design, installation and operation of pipeline systems. This part of ISO 14531 is structured to ensure the supply of mechanical fittings with an end-load resistance greater than that exhibited by the pipe(s) to which the fittings
22、are connected. INTERNATIONAL STANDARD ISO 14531-3:2010(E) ISO 2010 All rights reserved 1Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems for the conveyance of gaseous fuels Metric series Specifications Part 3: Fittings for mechanical jointing (including PE-X/metal transitions
23、) 1 Scope This part of ISO 14531 specifies the physical properties and mechanical-performance requirements for full- end-load-resistant mechanical fittings for use in the connection of crosslinked polyethylene (PE-X) pipes conforming to ISO 14531-1 and in the construction of transition assemblies fo
24、r joining PE-X pipes to metal pipes having plain spigot, screw thread, compression socket and flange terminations. In addition, it lays down dimensional requirements and specifies some general material properties (including chemical resistance) together with a classification scheme for PE-X fitting
25、materials produced in the form of pipe. This part of ISO 14531, when used in conjunction with the other parts of ISO 14531, provides the basis for the design, manufacture and installation of PE-X piping systems (PE-X pipes, PE-X fusion fittings and mechanical fittings) for the supply of category D a
26、nd category E hydrocarbon-based fuels (see ISO 13623) at a) maximum operating pressures (MOPs) up to and including 16 bar 1)and b) a maximum operating temperature of +60 C and c) a minimum operating temperature of 1) 50 C; 2) 35 C; 3) 20 C. Conformity to this part of ISO 14531-3 of mechanical fittin
27、gs produced in accordance with ISO 10838-1, ISO 10838-2 or ISO 10838-3 may be claimed subject to the satisfactory conclusion of the tests listed in 5.6 and an end-use restriction on operating temperatures to the temperature range 20 C to +40 C. NOTE It is recognized that mechanical fittings conformi
28、ng to ISO 10838-1, ISO 10838-2 or ISO 10838-3 are limited to a maximum operating temperature of 40 C. Provision is made in ISO 14531-4 for the use on a restricted-temperature basis of ISO 10838 fittings conforming to 5.6 in conjunction with PE-X pipes conforming to ISO 14531-1. The fitting manufactu
29、rers technical file should also be consulted for relevant supporting information. For installation purposes, this part of ISO 14531 provides for the jointing of mechanical fittings to PE-X pipes within the temperature range 5 C to +40 C. 1) 1 bar = 10 5N/m 2= 100 kPa. ISO 14531-3:2010(E) 2 ISO 2010
30、All rights reserved2 Normative references The following referenced 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 7-1
31、, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation 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, Thermoplast
32、ics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparation of pipe test pieces ISO 1167-3, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Par
33、t 3: Preparation of components ISO 16010, Elastomeric seals Material requirements for seals used in pipes and fittings carrying gaseous fuels and hydrocarbon fluids ISO 3127, Thermoplastics pipes Determination of resistance to external blows Round-the-clock method ISO 3458, Assembled joints between
34、fittings and polyethylene (PE) pressure pipes Test of leakproofness under internal pressure ISO 4437, Buried polyethylene (PE) pipes for the supply of gaseous fuels Metric series Specifications ISO 8085-3:2001, Polyethylene fittings for use with polyethylene pipes for the supply of gaseous fuels Met
35、ric series Specifications Part 3: Electrofusion fittings ISO 9080, Plastics piping and ducting systems Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation ISO 10838-1:2000, Mechanical fittings for polyethylene piping systems for the supply of
36、 gaseous fuels Part 1: Metal fittings for pipes of nominal outside diameter less than or equal to 63 mm ISO 10838-2:2000, Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels Part 2: Metal fittings for pipes of nominal outside diameter greater than 63 mm ISO 10838-3:20
37、01, Mechanical fittings for polyethylene piping systems for the supply of gaseous fuels Part 3: Thermoplastics fittings for pipes of nominal outside diameter less than or equal to 63 mm ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications Classification, designation a
38、nd design coefficient ISO 13623, Petroleum and natural gas industries Pipeline transportation systems ISO 13951, Plastics piping systems Test method for the resistance of polyolefin pipe/pipe or pipe/fitting assemblies to tensile loading ISO 13957, Plastics pipes and fittings Polyethylene (PE) tappi
39、ng tees Test method for impact resistance ISO 14531-1, Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems for the conveyance of gaseous fuels Metric series Specifications Part 1: Pipes ISO 14531-2, Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems for the
40、 conveyance of gaseous fuels Metric series Specifications Part 2: Fittings for heat-fusion jointing ISO 14531-3:2010(E) ISO 2010 All rights reserved 3ISO 14531-4:2006, Plastics pipes and fittings Crosslinked polyethylene (PE-X) pipe systems for the conveyance of gaseous fuels Metric series Specifica
41、tions Part 4: System design and installation guidelines ISO 16010, Elastomeric seals Material requirements for seals used in pipes and fittings carrying gaseous fuels and hydrocarbon fluids ISO 19899, Plastics piping systems Polyolefin pipes and mechanical fitting assemblies Test method for the resi
42、stance to end load (AREL test) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 mechanical fitting fitting within a pipeline system that relies, fully or in part, upon the mechanical loading of component parts to effect a pipeline seal that pr
43、ovides pressure integrity, leaktightness and resistance to end loads 3.2 end-load resistance resistance to end load transmitted via the connecting pipe and generated by internal pressure, pipeline external interference and thermally induced pipe stresses in any combination NOTE Full-end-load resista
44、nce is the condition in which the joint is stronger than the connecting pipe when exposed to all applied end loads. 3.3 design temperature temperature used to determine the minimum required strength MRS , tNOTE See ISO 14531-4. 3.4 design pressure DP Fpressure upon which design calculations are base
45、d NOTE 1 See ISO 14531-4. NOTE 2 For fittings, the design pressure is designated DP F , whereas for pipes it is designated DP P . 4 Materials 4.1 General The materials from which the fitting components are manufactured shall have properties consistent with the production of a mechanical fitting with
46、 a pressure and end-load resistance equal to or better than that of the connecting PE-X pipes over the intended design life. Materials (e.g. plastics, rubbers and metals) utilized in the manufacture of fittings conforming to this International Standard shall be supplied in accordance with a relevant
47、 ISO standard. For rubber ring seals, the applicable standard shall be ISO 16010; for PE and PE-X materials the standard shall be ISO 14531-2. Alternative standards may be utilized in cases where suitable ISO standards do not exist. In such cases, fitness for purpose shall be established. ISO 14531-
48、3:2010(E) 4 ISO 2010 All rights reservedAll metal parts susceptible to corrosion shall be adequately protected. When dissimilar metallic materials are used which may be in contact with moisture, steps shall be taken to avoid the possibility of galvanic corrosion. The manufacturer of the fittings sha
49、ll maintain the availability of a technical file (generally confidential) with all relevant data to prove the conformity of fittings to this part of ISO 14531. Any change in the materials used that is likely to affect product quality and performance shall require a re-assessment of material performance against the requirements of this part of ISO 14531. 4.2 Strength The susceptibility of materials to crack f
