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 978-0-626-23895-7 SANS 10804-1:2010Edition 1ISO 10804-1:1996Edition 1SOUTH AFRICAN NATIONAL STANDARD Restrained joint systems for ductile iron pipel
4、ines Part 1: Design rules and type testing This national standard is the identical implementation of ISO 10804-1:1996 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
5、0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 10804-1:2010 Edition 1 ISO 10804-1:1996 Edition 1 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 Ca
6、st and ductile iron pipes and fittings, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in March 2010. INTERNATIONAL STANDARD IS0 108044 First edition 1996-12-15 Restrained joint systems for ductile i
7、ron pipelines - Part 1: Design rules and type testing Assemblages verrouik pour canalisations en fonte ductile - Partie I: R a=40Onet; p=iso; o=isocs; s=central Printed in Switzerland II SANS10804-1:2010This s tandard may only be used and printed by approved subscription and freemailing clients of t
8、he SABS .INTERNATIONAL STANDARD IS0 IS0 10804=1:1996(E) Restrained joint systems for ductile iron pipelines - Part 1: Design rules and type testing 1 Scope This part of IS0 10804 specifies design rules and type testing for restrained joint systems to be used on ductile iron pipelines complying with
9、IS0 2531 and IS0 7186, in order to determine their mechanical properties and leaktightness. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 10804. At the time of publication, the editions indicated wer
10、e valid. All standards are subject to revision, and parties to agreements based on this part of IS0 10804 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International St
11、andards. IS0 2531 : 1991, Ductjle iron pipes, fittings, and accessories for pressure pipelines. IS0 6708 : 1995, Pipework components - Definition and selection of DN (nominal size). IS0 7186 : 1996, Ductile iron products for sewerage applications. 3 Definitions For the purposes of this part of IS0 1
12、0804 the definitions given in IS0 6708 and the following definitions apply : 3.1 restrained joint : Joint in which a means is provided to prevent separation of the assembled joint. 3.2 allowable operating pressure : Internal pressure, excluding surge, that a component can safely withstand in permane
13、nt service. 3.3 maximum allowable operating pressure : Maximum internal pressure, including surge, that a component can safely withstand in service. SANS10804-1:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .IS0 10804-l : 1996(E) 0 IS0 3
14、.4 allowable test pressure : Maximum internal hydrostatic pressure which can be applied on site to a component in a newly installed pipeline. NOTE - This test pressure is different from the system test pressure, which is related to the design pressure of the pipeline and is intended to ensure its in
15、tegrity and leaktightness. 3.5 allowable bending moment : Bending moment that a joint between two components can safely withstand in service under the allowable operating pressure. 3.6 type test : Proof of design test which is done once, and is repeated only after change of design. 3.7 allowable ang
16、ular deflection : Angular deflection that a joint between two components can safely withstand in service under the allowable operating pressure. 4 Design rules 4.1 All restrained joints for ductile iron pipes, fittings and other components shall be designed with the requirements of this clause. If t
17、he design of a restrained joint has been tested and successfully used for a minimum of ten years, a type test as described in clause 5 is only required for a significant change in the design which could adversely affect the performance of the restrained joint. 4.2 The design safety factors with resp
18、ect to failure against axial forces due to internal pressure shall be such that the joints can withstand a type test pressure of I,5 times allowable operating pressure plus 5 bar I). 4.3 Alternatively, for those restrained joints which are rigid enough to be subjected to a bending moment the design
19、safety factor with respect to failure against the combined effects of axial forces and a bending moment shall be at least 2 at the allowable operating pressure and allowable bending moment. 4.4 Ductile iron pipelines and the restrained joints as defined in this part of IS0 10804 are well suited for
20、use in seismic zones. However, certain locations, such as fault crossings, liquefaction zones, connections to structures, etc., require specialized designs. The pipe manufacturer or a competent earthquake engineer should be consulted. 4.5 For joint restraint components, the protection against aggres
21、sive soils shall be at least as good as that of the pipes and/or fittings. It may be achieved by means of works applied coatings and/or site applied protection systems. 1) 1 bar= IO5 N/m2 =lOPa=O,l MPa 2 SANS10804-1:2010This s tandard may only be used and printed by approved subscription and freemai
22、ling clients of the SABS . IS0 IS0 10804-l : 1996(E) 5 Type testing 5.1 General Each restrained joint design shall be tested in order to demonstrate its mechanical strength and its watertightness under the most unfavourable conditions of castings tolerances and joint movements. The type tests shall
23、be carried out in the configuration of maximum design radial gap between the components to be jointed (smallest spigot together with largest socket). In addition, the spigot thickness shall be the minimum casting thickness “00 % . NOTE - When the failure mode justifies it, the type tests are also ca
24、rried out in the configuration of minimum design radial gap. In the type tests, the maximum gap shall not be less than the corresponding maximum design radial gap by more than 5 % or 0,5 mm (whichever is the smaller). The internal socket diameter may be machined to achieve this. 5.2 Test conditions
25、There shall be a type test for at least one DN for each of the groupings given in table 1 Y normally using the preferred DN. One DN is representative of a grouping when the performances are based on the same design parameters throughout the size range. Table 1 DN groupings Preferred DN in each group
26、ing 40 to 250 300 to 600 700 to 1000 1100 to 2000 2000 200 400 800 1600 2400 If a grouping covers products of different designs and/or products manufactured by different processes, the grouping shall be subdivided. If, for a certain manufacturer, a grouping contains only one DN, this DN may be consi
27、dered as part of the adjacent grouping provided that it is of identical design and manufactured by the same process. Each diameter tested shall be subjected to the following conditions : a) joint assembled in the aligned position, then deflected to the allowable angular deflection indicated in the m
28、anufacturers instructions, and tested while maintained in the deflected position ; b) joint assembled in the aligned position, then subjected to a load giving a resultant shear force across the joint not less than 50 x DN (expressed in newtons), and tested under shear. All joint assemblies shall exh
29、ibit no visible leakage and no mechanical instability after 2 h under a hydrostatic pressure as given in 4.2 or 4.3. In addition, any axial movement that may occur at the joint shall reach a constant value within the 2 h. SANS10804-1:2010This s tandard may only be used and printed by approved subscr
30、iption and freemailing clients of the SABS .iSO 10804-d :1996(E) IS0 5.3 Test method The testing apparatus shall be capable of providing suitable end closure whether the joint is in the aligned position, or deflected, or subjected to a shear load. It shall be equipped with a pressure gauge with an a
31、ccuracy of Q 3 %. The test shall be carried out on an assembled joint comprising two pipe sections, each at least 1 m long. For the test according to 5.2 b), the shear load shall be applied to the spigot end by means of a V-shaped block with an angle of 120, located at approximately 0,5 x DN, in mil
32、limetres, or 200 mm from the socket face (whichever is the larger) ; the socket shall bear on a flat support. The testing assembly shall be filled with water and suitably vented. The test pressure shall be raised by steps : for example, 10 bar steps, at a rate not exceeding 1 bar/s ; the axial movem
33、ent shall be measured after 5 min at each test pressure. The test pressure shall be kept constant to k 1 bar for at least 2 h during which the joint is thoroughly inspected and its axial movement measured every 15 min. At the manufacturers option the test may be continued at higher pressures. 5.4 Te
34、st report The test report shall contain the following : a) type of joint ; b) size range covered by the test ; c) DN tested ; d) class of pipe tested ; e) allowable operating pressure ; f) maximum allowable operating pressure ; g) allowable test pressure ; h) allowable angular deflection ; i) allowa
35、ble bending moment (if applicable) ; j) result of test ; k) date of test. 4 SANS10804-1:2010This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .SABS Standards Division The objective of the SABS Standards Division is to develop, promote and mainta
36、in South African National Standards. This objective is incorporated in the Standards Act, 2008 (Act No. 8 of 2008). Amendments and Revisions South African National Standards are updated by amendment or revision. Users of South African National Standards should ensure that they possess the latest ame
37、ndments or editions. The SABS continuously strives to improve the quality of its products and services and would therefore be grateful if anyone finding an inaccuracy or ambiguity while using this standard would inform the secretary of the technical committee responsible, the identity of which can b
38、e found in the foreword. Tel: +27 (0) 12 428 6666 Fax: +27 (0) 12 428 6928 The SABS offers an individual notification service, which ensures that subscribers automatically receive notification regarding amendments and revisions to South African National Standards. Tel: +27 (0) 12 428 6883 Fax: +27 (
39、0) 12 428 6928 E-mail: salessabs.co.za Buying Standards Contact the Sales Office for South African and international standards, which are available in both electronic and hardcopy format. Tel: +27 (0) 12 428 6883 Fax: +27 (0) 12 428 6928 E-mail: salessabs.co.za South African National Standards are a
40、lso available online from the SABS website http:/www.sabs.co.za Information on Standards The Standards Information Centre provides a wide range of standards-related information on both national and international standards, and is the official WTO/TBT enquiry point for South Africa. The Centre also o
41、ffers an individual updating service called INFOPLUS, which ensures that subscribers automatically receive notification regarding amendments to, and revisions of, international standards. Tel: +27 (0) 12 428 6666 Fax: +27 (0) 12 428 6928 E-mail: infosabs.co.za Copyright The copyright in a South Afri
42、can National Standard or any other publication published by the SABS Standards Division vests in the SABS. Unless exemption has been granted, no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means without prior written permission from the SABS Standards
43、 Division. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any purpose other than implementation, prior written permission must be obtained. Details and advice can be obtained from the Senior Manager. Tel: +27 (0) 12 428 6666 Fax: +27 (0) 12 428 6928 E-mail: infosabs.co.za
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