JIS G3443-4-2020 供水用涂层钢管 第4部分：内部环氧涂层

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JIS G 3443-4 : 2020
Coated steel pipes for water
service—Part 4: Internal epoxy
coatings
ICS 23.040.10;77.140.75
Reference number : JIS G 3443-4 :2020 (E)
JAPANESE
INDUSTRIAL
STANDARD
Translated and Published by
Japanese Standards Association
(WSP/JSA)
PROTECTED BY COPYRIGHT 17 S
Date of Establishment: 2007-02-20
Date of Revision: 2020-05-20
Date of Public Notice in Official Gazette: 2020-05-20
Investigated by: Japanese Industrial Standards Committee
Standards Board for ISO area
JIS G 3443-4:2020, First English edition published in 2020-11
Translated and published by: Japanese Standards Association
Mita MT Building, 3-13-12, Mita, Minato-ku, Tokyo, 108-0073 JAPAN
In the event of any doubts arising as to the contents,
the original JIS is to be the final authority.
© JSA 2020
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 the publisher.
Printed in Japan
AT
G 3443-4 : 2020
PROTECTED BY COPYRIGHT
G 3443-4 : 2020
(i)
PROTECTED BY COPYRIGHT
Contents
Page
1Scope ···························································································································· 1
2Normative references ································································································· 1
3Terms and definitions································································································ 2
4Classification and grade symbols of epoxy coatings ·············································· 2
5Epoxy coating material······························································································ 3
6Epoxy coating method ······························································································· 3
6.1 Substrate treatment ·································································································· 3
6.2 Coating ························································································································ 3
6.3 Treatment of pipe end holidays················································································ 3
6.4 Curing of film ············································································································· 3
7Requirements for epoxy coatings ············································································· 4
7.1 Appearance ················································································································· 4
7.2 Film thickness ············································································································ 4
7.3 Length of pipe end holidays······················································································ 4
7.4 Film performance ······································································································· 4
8Test methods ·············································································································· 5
8.1 Appearance test ·········································································································· 5
8.2 Film thickness test ···································································································· 5
8.3 Length test of pipe end holidays ·············································································· 5
8.4 Pinhole test ················································································································· 5
8.5 Adhesion test (chipping method) ·············································································· 5
9Inspection ···················································································································· 5
9.1 Appearance inspection ······························································································· 5
9.2 Film thickness inspection ························································································· 5
9.3 Length inspection of pipe end holidays ··································································· 5
9.4 Pinhole inspection ······································································································ 6
9.5 Adhesion inspection ··································································································· 6
9.6 Re-inspection ·············································································································· 6
10 Marking ·······················································································································6
11 Report ·························································································································· 6
Annex A (normative) Epoxy coating material ······························································· 7
Annex B (normative) Long-life solventless epoxy coating ········································· 13
Annex C (informative) Epoxy coating of field welds ··················································· 21
Annex D (informative) Long-life solventless epoxy coating of field welds················ 25

标签： #钢 #钢管 #管

摘要：

本标准规范文档标题为“JIS G3443-4-2020 供水用涂层钢管 第4部分：内部环氧涂层”，该标准由日本工业标准调查会制定，专门针对供水系统中使用的涂层钢管的内壁防腐处理。第4部分重点规定了内部环氧涂层的材料、施工工艺、性能要求及检验方法，确保涂层在长期接触饮用水环境下具备优异的附着力、耐腐蚀性和卫生安全性。本标准适用于市政供水、建筑给水及工业输水等领域，为钢管内部涂覆环氧树脂提供统一的技术依据，有助于提升管道的使用寿命并保障水质安全。执行JIS G3443-4-2020标准可有效防止钢管

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