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 978-0-626-23904-6 SANS 8179-2:2010Edition 1ISO 8179-2:1995Edition 1SOUTH AFRICAN NATIONAL STANDARD Ductile iron pipes External zinc coating Part 2:
4、Zinc rich paint with finishing layer This national standard is the identical implementation of ISO 8179-2:1995 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
5、: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 8179-2:2010 Edition 1 ISO 8179-2:1995 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 Cast and du
6、ctile 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 8179-2 First edition 1995-12-15 Ductile iron pipes - External zinc coating - Pa
7、rt 2: Zinc rich paint with finishing layer Tuyaux en fonte ductile - Rev A is the area of the token, in square metres; c is a correction factor depending on the material of the token, taking into ac- count the difference in surface rough- ness between the token and the pipe surface. The value of C s
8、hall be determined by the manufac- turer and specified when required in test documents. NOTE 1 For information, C lies between I,0 and I,2 for sand-blasted steel sheet or polyester sheet. The uniformity of the zinc rich paint coating is checked by visual inspection of the token. In the event of lack
9、 of uniformity, pieces 50 mm x 50 mm shall be cut from the token in the lighter zones and the local minimum mass of zinc rich paint coating determined according to the above method. 4.6 Repairs to the zinc rich paint coating The manufacturer is permitted to carry out repairs by zinc rich paint coati
10、ng, provided that the requirements of clause 3, and subclauses 4.3 and 4.4 are met. 5 Finishing layer After zinc rich paint coating, the pipe shall be given a finishing layer of bituminous paint or synthetic resin compatible with the zinc rich paint coating. Application of this finishing layer may b
11、e done by any proven process such as spraying or brush coating at the manufacturers discretion. It shall uniformly cover the zinc rich paint coating and be free from bare patches or lack of adhesion. The mean dry film thickness of the finishing layer shall be not less than 70 pm with a local minimum
12、 thick- ness of 50 pm. Verification of the dry film thickness of the finishing layer shall be carried out by measurement a) directly on the pipes by means of suitable gauges, e.g. magnetic, or by using a “wet film” thickness gauge where a correlation between wet film thickness and dry film thickness
13、 can be demonstrated or b) indirectly on a sample token which is attached to the pipe before coating and is used after coating to measure the dry film thickness by appropriate means, e.g. micrometer, magnetic thickness gauge or by a weight method similar to 4.5 m2 should be measured after the sample
14、 has been NOTE 2 The method of measurement is at the manu- dried facturers discretion. SANS 8179-2:2010This 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
15、 and maintain 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
16、 latest amendments 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
17、which can be 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
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20、ntre also offers 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
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