1、BS ISO 9349:2017 Ductile iron pipes, fittings, accessories and their joints Thermal preinsulated products BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 9349:2017 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 9349:2
2、017. It supersedes BS ISO 9349:2004 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PSE/10, Iron pipes and fittings. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport t
3、o include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017. Published by BSI Standards Limited 2017 ISBN 978 0 580 91818 6 ICS 77.140.75; 93.025 Compliance with a British Standard cannot confer immunity from legal o
4、bligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2017. Amendments/corrigenda issued since publication Date T e x t a f f e c t e dBS ISO 9349:2017 ISO 2017 Ductile iron pipes, fittings, accessories and their joints Thermal
5、 preinsulated products Tuyaux, raccords et accessoires en fonte ductile et leurs assemblages Produits prisols thermiques INTERNATIONAL STANDARD ISO 9349 Third edition 2017-03 Reference number ISO 9349:2017(E)BS ISO 9349:2017ISO 9349:2017(E)ii ISO 2017 All rights reserved COPYRIGHT PROTECTED DOCUMENT
6、 ISO 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written per
7、mission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.orgBS ISO 9349:2017I
8、SO 9349:2017(E)Foreword iv 1 Scope . 1 2 Normative references 1 3 Terms and definitions . 2 4 Technical requirements 2 4.1 General . 2 4.2 Conveying ductile iron pipes and fittings. 3 4.3 Casing of preinsulated pipes . 3 4.4 Casing of preinsulated fittings . 3 4.4.1 General 3 4.4.2 HDPE casings 3 4.
9、4.3 Steel casings . 4 4.5 Thermal insulation 4 4.6 Joints of conveying pipes and fittings 4 4.7 Junctions between preinsulated pipes and fittings (on site assembly) . 5 4.8 Marking . 5 5 Tables of dimensions 5 ISO 2017 All rights reserved iii Contents PageBS ISO 9349:2017ISO 9349:2017(E) Foreword IS
10、O (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 body interested in a subject for which a technical co
11、mmittee 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 Electrotechnical Commission (IEC) on all matters of electro
12、technical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was dra
13、fted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such paten
14、t rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents). Any trade name used in this document is information given for the convenience of users and does no
15、t constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformit y assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www . i
16、 s o .org/ iso/ foreword .html. The committee responsible for this document is ISO/TC 5, Ferrous metal pipes and metallic fittings, Subcommittee SC 2, Cast iron pipes, fittings and their joints. This third edition cancels and replaces the second edition (ISO 9349:2004), which has been technically re
17、vised with the following changes: its scope has been limited to the conveyance of fluids at temperature not exceeding 50 C; its style and presentation have been reviewed and improved.iv ISO 2017 All rights reservedBS ISO 9349:2017INTERNATIONAL ST ANDARD ISO 9349:2017(E) Ductile iron pipes, fittings,
18、 accessories and their joints Thermal preinsulated products 1 Scope This document specifies the requirements and test methods applicable to preinsulated ductile iron pipes, fittings, accessories and their joints for the construction of pipelines (or parts thereof): to convey water (e.g. potable wate
19、r), wastewater and other liquids; to be operated with or without pressure; to be installed below or above ground; to limit temperature variations of the conveyed fluids. These pipelines are mainly used to prevent the water to be conveyed from freezing by providing external insulation. NOTE 1 In this
20、 document, all pressures are relative pressures expressed in bars 1) . This document gives, in addition to the specifications of the existing International Standards for the conveying ductile iron pipes and fittings, specifications for materials, dimensions and tolerances, mechanical and thermal pro
21、perties of the thermal insulation layer and external casing of preinsulated ductile iron pipes, fittings and accessories. This document covers preinsulated ductile iron pipes, fittings and accessories of a size range extending from DN 60 to DN 600 inclusive, which are as follows: manufactured with s
22、ocketed, flanged or spigot ends for jointing by means of various types of gaskets which are not within the scope of this document; preinsulated in the works (excluding on site application of the insulation layer and/or the casing); normally delivered internally and externally coated; intended for fl
23、uid temperatures from 0 C to 50 C, excluding frost. NOTE 2 Other applications are possible by agreement between manufacturer and purchaser. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this docu
24、ment. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 527-2, Plastics Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics ISO 844, Rigid cel
25、lular plastics Determination of compression properties ISO 845, Cellular plastics and rubbers Determination of apparent density ISO 1183-3, Plastics Methods for determining the density of non-cellular plastics Part 3: Gas pyknometer method ISO 2531, Ductile iron pipes, fittings, accessories and thei
26、r joints for water applications 1) 100 kPa = 1 bar. ISO 2017 All rights reserved 1BS ISO 9349:2017ISO 9349:2017(E) ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature ISO 7186, Ductile iron products for sewerage applications ISO 8497, Thermal insulation Determin
27、ation of steady-state thermal transmission properties of thermal insulation for circular pipes ISO/TR 25901-3, Welding and allied processes Vocabulary Part 3: Welding processes 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2531 apply. ISO and IEC m
28、aintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp 3.1 conveying pipe pipe conveying the fluid 3.2 conveying fitting pipelin
29、e component conveying the fluid and corresponding to a change in direction, to a diversion, or to a blanking off of the pipeline 3.3 preinsulated pipe factory-produced ductile iron pipe comprising a conveying pipe, external thermal insulation and casing 3.4 preinsulated fitting factory-produced duct
30、ile iron fitting comprising a conveying fitting, external thermal insulation and casing 3.5 casing external protection of the thermal insulation layer made from PE or PVC or steel, in tubular or any suitable shape 3.6 thermal insulation layer of porous and rigid polyurethane foam between the conveyi
31、ng pipe/fittings and casing, intended to reduce heat transfer between the fluid in the conveying pipe and the external environment 4 Technical requirements 4.1 General A preinsulated pipe (or fitting) is generally manufactured by injection moulding the polyurethane foam thermal insulation layer betw
32、een the ductile iron conveying pipe (or fitting) and a casing which provides the external protection against mechanical damage and moisture ingress. The external diameter DR of a preinsulated pipe or fitting is the external diameter of the casing.2 ISO 2017 All rights reservedBS ISO 9349:2017ISO 934
33、9:2017(E) 4.2 Conveying ductile iron pipes and fittings The conveying pipes and fittings shall comply with the requirements of ISO 2531 for water applications and of ISO 7186 for sewage applications, or, by agreement between manufacturer and purchaser, with the requirements of relevant national stan
34、dards. Prior to thermal insulation application, the external surface of the conveying pipes and fittings shall be dry and clean. 4.3 Casing of preinsulated pipes Casings shall be made of polyethylene (HDPE), poly(vinyl chloride) (PVC) or steel. Their characteristics shall comply with the requirement
35、s of Table 1. For above ground applications, HDPE and PVC casings shall be resistant to ultraviolet radiation. All steel casings shall be externally coated (e.g. galvanized); the external coating shall be adapted to the application (above or below ground) and shall comply with an international or na
36、tional standard, or an agreed technical specification. Prior to thermal insulation application, the internal surface of the casings shall be dry and clean. The variation in the casing external diameter DR during injection moulding of the thermal insulation shall not exceed +2 %. Table 1 Casing mater
37、ials and their characteristics Casing a Characteristic Specified value Test method High density polyethylene (HDPE) Density 940 kg/m 3 ISO 1183-3 Yield stress 19 MPa ISO 527-2 Percentage elongation at fracture 350 % ISO 527-2 Poly(vinyl chloride) (PVC) Density 1 350 kg/m 3 ISO 1183-3 Percentage elon
38、gation at fracture 50 % to 150 % ISO 527-2 Tensile strength 47 MPa ISO 527-2 Steel (pipe or spirally wound) Tensile strength 320 MPa ISO 6892-1 Percentage elongation at fracture 15 % ISO 6892-1 aOther materials can be used by agreement between manufacturer and purchaser. 4.4 Casing of preinsulated f
39、ittings 4.4.1 General The external protection of fittings shall consist of preformed casings which shall be fabricated by welding several elements cut from the same HDPE or steel casings as those used for preinsulated pipes (see 4.3). After welding and before moulding the polyurethane foam, the pref
40、ormed casing shall be centred with respect to the conveying fitting. The internal surface of the preformed casing shall be dry and clean. After the moulding operation, there shall be no leakage of foam through the welds. 4.4.2 HDPE casings Before welding, the elements shall be cut with good precisio
41、n to the required angle and both ends shall be ground. The welding operation shall be carried out by qualified personnel, either by the hot plate method (butt welding) or by deposition of polyethylene. The difference in fluidity indexes of the added polyethylene and the polyethylene of the casing sh
42、all not exceed 0,5. ISO 2017 All rights reserved 3BS ISO 9349:2017ISO 9349:2017(E) The mismatch between welded elements shall not exceed half the thickness of the casing in the direction perpendicular to the casing wall and 3 mm in the direction parallel to the axis of the casing. The welds shall ha
43、ve a maximum width of 20 mm and a maximum height of 5 mm; they shall not be ground. 4.4.3 Steel casings Before welding, the elements shall be cut with good precision to the required angle and both ends shall be ground. The welding operation shall be carried out by qualified personnel, in accordance
44、with ISO/TR 25901-3, and shall result in a watertight weld. The steel casing should be externally coated, complying with an international or a national standard. 4.5 Thermal insulation The rigid polyurethane foam thermal insulation layer shall have a regular structure of fine pores. Specifications c
45、oncerning the foam shall be as given in Table 2. The mean thickness of the thermal insulation layer shall be as given in Tables 4 to 7, excluding the socket end of the pipe or fitting; this will give a maximum thermal conductivity of 0,027 W/(mK) for the preinsulated pipe. Thicker thermal insulation
46、 layers may be supplied by agreement between manufacturer and purchaser. The eccentricity of the insulation layer, defined as the distance between the ductile iron conveying pipe axis and the casing axis, shall not exceed the values given in Table 3. At both ends of pipes and fittings, the end faces
47、 of the insulation layer shall be covered by a polymeric sheath or a rubber ring. Table 2 Thermal insulation characteristics Characteristic Specified value Test method Average density 80 kg/m 3 ISO 845 Local density 60 kg/m 3 ISO 845 Compressive strength 0,3 MPa ISO 844 Thermal conductivity at 50 C
48、0,023 W/(mK) ISO 8497 Table 3 Maximum eccentricity of the insulation layer Casing external diameter Maximum value of the eccentricity DR mm mm DR 170 3 170 DR 410 4,5 410 DR 630 6 630 DR 8 4.6 Joints of conveying pipes and fittings Joints of conveying pipes and fittings shall be flexible joints comp
49、lying with the requirements of ISO 2531 or ISO 7186, as applicable.4 ISO 2017 All rights reservedBS ISO 9349:2017ISO 9349:2017(E) 4.7 Junctions between preinsulated pipes and fittings (on site assembly) Continuity of the thermal insulation shall be ensured by inserting a ring of flexible foam between the end faces of the polyurethane foam layer of two consecutive pipes and/or fittings. Continuity of the casing shall be provided by means of a rubber sleeve or a heat shrin
