1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23897-1 SANS 9349:2010Edition 1ISO 9349:2004Edition 2SOUTH AFRICAN NATIONAL STANDARD Preinsulated ductile iron pipeline systems This natio
4、nal standard is the identical implementation of ISO 9349:2004 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.c
5、o.za SABS SANS 9349:2010 Edition 1 ISO 9349:2004 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 138C, Water and sanitation Equipment and systems Cast and ductile iron pipes and fittings, in accordance with pro
6、cedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in March 2010. INTERNATIONALSTANDARDISO9349Second edition2004-06-15Reference numberISO 9349:2004(E) ISO 2004Preinsulated ductile iron pipeline systemsSystmes de canalisations
7、 prisoles en fonte ductileSANS 9349:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 9349:2004(E)ii ISO 2004 All rights reservedPDF disclaimerThis PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, thi
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12、E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandSANS 9349:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 9349:2004(E) ISO 2004 All rights reserved iiiForewordISO (the International Organization for Standardization) is a
13、 worldwide federation of national standards bodies(ISO member bodies). The work of preparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented o
14、n that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in
15、 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 Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard req
16、uires 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 patentrights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 9349 was prepared by Technical
17、Committee ISO/TC 5, Ferrous metal pipes and metallic fittings,Subcommittee SC 2, Cast iron pipes, fittings and their joints.This second edition cancels and replaces the first edition (ISO 9349:1991), of which it constitutes a technicalrevision. Its scope has been limited to the conveyance of fluids
18、at temperature not exceeding 50 C; its style andpresentation have been reviewed and improved.SANS 9349:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ivSANS 9349:2010This s tandard may only be used and printed by approved subscription an
19、d freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 9349:2004(E) ISO 2004 All rights reserved 1Preinsulated ductile iron pipeline systems1ScopeThis International Standard specifies the requirements and test methods applicable to preinsulated ductile ironpipes, fittings, accessories and the
20、ir joints for the construction of pipelines (or parts thereof) to convey water (e.g. potable water), 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.NOTE 1 In this International Stand
21、ard, all pressures are relative pressures expressed in bars ( ).This International Standard gives, in addition to the specifications of the existing ISO standards for theconveying ductile iron pipes and fittings, specifications for materials, dimensions and tolerances, mechanicaland thermal properti
22、es of the thermal insulation layer and external casing of preinsulated ductile iron pipes,fittings and accessories.This International Standard covers preinsulated ductile iron pipes, fittings and accessories of a size rangeextending from DN 60 to DN 600 inclusive, which are manufactured with sockete
23、d, flanged or spigot ends for jointing by means of various types of gaskets whichare not within the scope of this International Standard; preinsulated in the works (excluding on-site application of the insulation layer and/or the casing); normally delivered internally and externally coated; intended
24、 for fluid temperatures from to , excluding frost.NOTE 2 Other applications are possible by agreement between manufacturer and purchaser.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applie
25、s. 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 extrusionplasticsISO 844, Rigid cellular plastics Determination of compression propertiesISO 845
26、, Cellular plastics and rubbers Determination of apparent (bulk) densityISO 857-1, Welding and allied processes Vocabulary Part 1: Metal welding processesISO 1183-3, Plastics Methods for determining the density of non-cellular plastics Part 3: Gas pyknometermethodISO 2531, Ductile iron pipes, fittin
27、gs, accessories and their joints for water or gas applications100 kPa = 1 bar0C50CSANS 9349:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 9349:2004(E)2 ISO 2004 All rights reservedISO 6892, Metallic materials Tensile testing at ambi
28、ent temperatureISO 7186, Ductile iron products for sewage applicationsISO 8497, Thermal insulation Determination of steady-state thermal transmission properties of thermalinsulation for circular pipes3 Terms and definitionsFor the purposes of this document, the terms and definitions of ISO 2531 and
29、the following apply.3.1 conveying pipepipe conveying the fluid3.2 conveying fittingpipeline component conveying the fluid and corresponding to a change in direction, to a diversion, or to ablanking off of the pipeline3.3 preinsulated pipefactory-produced pipe comprising a conveying pipe, thermal ins
30、ulation and external protection3.4 preinsulated fittingfactory-produced fitting comprising a conveying fitting, thermal insulation and external protection3.5 casingexternal protection of the thermal insulation layer made from PE, PVC or steel4 Technical requirements4.1 GeneralA preinsulating pipe (o
31、r fitting) is generally manufactured by injection moulding of the polyurethane foamthermal insulation layer between the ductile iron conveying pipe (or fitting) and a casing which provides theexternal protection against mechanical damage and moisture ingress.The external diameter, DR, of a preinsula
32、ted pipe or fitting is the external diameter of the casing.4.2 Conveying pipes and fittingsThe conveying pipes and fittings shall comply with the requirements of ISO 2531 for water applications andthose of ISO 7186 for sewage applications or, by agreement between manufacturer and customer, with ther
33、equirements of relevant national standards.Prior to thermal insulation application, the external surface of the conveying pipes and fittings shall be dry andclean.4.3 External protection of preinsulated pipesCasings shall be made of existing pipes of polyethylene (HDPE), poly(vinyl chloride) (PVC) o
34、r steel. Theircharacteristics shall comply with the requirements given in Table 1. For above ground applications, HDPE andPVC casings shall be resistant to ultraviolet radiation. All steel casings shall be externally coated (e.g.SANS 9349:2010This s tandard may only be used and printed by approved s
35、ubscription and freemailing clients of the SABS .ISO 9349:2004(E) ISO 2004 All rights reserved 3galvanized); the external coating shall be adapted to the application (above or below ground) and shall complyto an international or to a national standard, or to an agreed technical specification.Prior t
36、o 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 notexceed .4.4 External protection of preinsulated fittings4.4.1 GeneralThe external protection of
37、 fittings shall consist of preformed casings which shall be fabricated by weldingseveral 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 preformed casing shall be centred with respect tothe c
38、onveying fitting. The internal surface of the preformed casing shall be dry and clean. After the mouldingoperation, there shall be no leakage of foam through the welds.4.4.2 Welding preformed HDPE casingsBefore welding, the elements shall be cut, with high precision, to the required angle and both e
39、nds shall beground.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 index of the added polyethylene and that of thepolyethylene of the casing shall not exceed 0,5.The mismatch
40、between welded elements shall not exceed half the thickness of the casing in the directionperpendicular to the casing wall, and in the direction parallel to the axis of the casing.The welds shall have a maximum width of and a maximum height of ; they shall not be ground.4.4.3 Welding preformed steel
41、 casingsBefore welding, the elements shall be cut, with high precision, to the required angle and both ends shall beground.The welding operation shall be carried out by qualified personnel, in accordance with ISO 857-1, and shallresult in a watertight weld.Table 1Casing Characteristic Specified valu
42、e Test methodHigh density polyethylene (HDPE)Volume mass ISO 1183-3Apparent yield stress ISO 527-2Percentage elongation after fracture ISO 527-2Poly(vinyl chloride) (PVC)Volume mass ISO 1183Percentage elongation after fracture to ISO 527-2Tensile strength ISO 527-2Steel (pipe or spirally wound)Tensi
43、le strength ISO 6892Percentage elongation after fracture ISO 6892greaterorequalslant 940 kg/m3greaterorequalslant 19 MPagreaterorequalslant 350 %greaterorequalslant 1 350 kg/m350 % 150 %greaterorequalslant 47 MPagreaterorequalslant 320 MPagreaterorequalslant 15 %+2%3mm20 mm 5 mmSANS 9349:2010This s
44、tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 9349:2004(E)4 ISO 2004 All rights reserved4.5 Thermal insulationThe rigid polyurethane foam thermal insulation layer shall have a regular structure of fine pores. Specificationsconcerning the foam
45、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 endof the pipe or fitting; this will give a maximum thermal conductivity of for the preinsulated pipe.NOTE Thicker thermal insulation layers may be supplied by agr
46、eement between manufacturer and purchaser.The eccentricity of the insulation layer, defined as the distance between the ductile iron conveying pipe axis andthe casing axis, shall not exceed the values given in Table 3.At both ends of pipes and fittings, the end faces of the insulation layer shall be
47、 covered by a polymeric sheathor a rubber ring.4.6 Joints of conveying pipes and fittingsJoints of conveying pipes and fittings shall be flexible push-in joints complying with the requirements ofISO 2531 or ISO 7186, as applicable.4.7 Junctions between preinsulated pipes and fittings (on-site assemb
48、ly)Continuity of the thermal insulation shall be ensured by inserting a ring of flexible foam between the end facesof the polyurethane foam layer of two consecutive pipes or fittings.Continuity of the external protection shall be provided by means of a rubber sleeve or a heat shrink polyethyleneslee
49、ve.4.8 Marking4.8.1 Ductile iron conveying pipes and fittings shall be marked in conformity with ISO 2531 or ISO 7186, asapplicable.Table 2Characteristic Specified value Test methodAverage volume mass ISO 845Local volume mass ISO 845Compressive strength ISO 844Thermal conductivity at ISO 8497Table 3Casing external diameter Maximum value of the eccentricityDRmm mm34,568greaterorequalslant 80 kg/m3greaterorequalslant 60 kg/m3greaterorequalslant 0,3 MPa50C lessorequalslant 0,023 W/(m K)0,027 W/(m K)DR lessorequalslant 1701
