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1、J IS JAPANESE INDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Standard qualification procedure for welding technique of plastics ICs 25.160.01; 83.140.01 Reference number : JIS Z 3831 : 2002 (E) PROTECTED BY COPYRIGHT 6s Copyright Japanese Standards Association Provide
2、d by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 08:15:30 MDTNo reproduction or networking permitted without license from IHS -,-,- Z 3831 : 2002 Foreword This translation has been made based on the original Japanese Industrial Standard r
3、evised by the Minister of Economy, Trade and Industry through deliberations at the Japanese Industrial Standards Committee, as the result of proposal for revision of Japanese Industrial Standard submitted by The Japan Welding Engineering Society (JWES) with the draft being attached, based on the pro
4、vision of Article 12 Clause 1 of the Industrial Standardization Law applicable to the case of revision by the provision of Article 14. Consequently JIS Z 3831 : 1989 is replaced with this Standard. Date of Establishment: 1970-07-01 Date of Revision: 2002-07-20 Date of Public Notice in Official Gazet
5、te: 2002-07-22 Investigated by: Japanese Industrial Standards Committee Standards Board Technical Committee on Welding JIS Z 3831 : 2002, First English edition published in 2003-04 Translated and published by: Japanese Standards Association 4-1 -24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the e
6、vent of any doubts arising as to the contents, the original JIS is to be the final authority. O JCA 2003 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 microf
7、ilm, without permission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 08:15:30 MDTNo reproduction or networking perm
8、itted without license from IHS -,-,- Z 3831 : 2002 Contents 1 2 3 4 5 6 7 7.1 7.2 8 9 10 11 11.1 11.2 Scope Normative references Definitions Classification of standard technical qualification test . Welding method . Welding position Test plate and test piece sampling location . Classification of tes
9、t plates . Shape and dimensions of test plate . Welding rod used for the test . Welding instrument used for the test and backing strip Precaution for welding . Method of judgement Appearance test . Tensile test . 12 Criteria for acceptance . 1 1 1 1 2 2 3 3 3 4 4 4 4 4 4 5 (i PROTECTED BY COPYRIGHT
10、Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 08:15:30 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS Z 3831 : 2002 Standard qu
11、alification procedure for welding technique of plastics 1 Scope This Japanese Industrial Standard specifies the test method and crite- ria for acceptance in the qualification procedure for the welding technique of plas- tics by hot jet method. Automatic welding is excepted. 2 Normative references Th
12、e following standards contain provisions which, through reference in this Standard? constitute provisions of this Standard, The most recent editions of the standards (including amendments) indicated below shall be applied. JIS K 6745 Plastics-Unplasticized poly (vinyl chloride) sheets-Types, dimen-
13、sions and characteristics-Part 1 : Sheets of thickness not less than 1 mm JIS K 6746 Plastic welding rods JIS K 6921-1 Plastics-Polypropylene (PP) moulding and extrusion materials- Part I : Designation system and basis for specifications JIS K 6922-1 Plastics-Polyethylene (PE) moulding and extrusion
14、 materials- Part 1 : Designation system and basis for specifications JIS K 7162 Plastics-Determination of tensile properties Part 2 i Test conditions for moulding and extrusion plastics JIS 2 3001 Welding terms 3 Definitions For the purposes of this Standard the definitions given in JIS Z 3001 and t
15、he following definitions apply: a) test plate A resin plate prepared for the test; b) test material A welded plate; c test piece A piece of test material which has been processed to be of specific shape and dimensions for carrying out the tensile test; rod jointing Jointing a bead when the welding r
16、od is running out or falling short of the length required during welding. d) 4 Classification of standard technical qualification test The standard tech- nical qualification tests are divided according to the classes of the test plate and the welding position? and their symbols are as given in Table
17、 1. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 08:15:30 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 Z 3831 : 2002 Welding positio
18、n Flat Table 1 Classification of standard technical qualification test Symbols PVC-F Yassification of test plate Vertical Horizontal Polyvinyl chloride plate PVC-v PVC-3 Polypropylene plate Horizontal Overhead Polyethylene plate PP-H PP-O Flat Vertical PE-F PE-V Overhead I PVC-O I Horizontal Overhea
19、d Flat I PP-F I PE-H PE-O vertical I PP-v 5 Welding method The method for welding the test plate shall be the hot jet method. The gas to be used shall be air. 6 Welding position The position for welding the plate shall be flat, vertical, hori- zontal or overhead as shown in Fig. 1. Flat position Hor
20、izontal Vertical Horizontal position Fig. 1 Horizontal I Vertical Vertical position Horizontal Horizontal Overhead position Welding position PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not
21、for Resale, 03/11/2007 08:15:30 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 2 3831 : 2002 I Approx. 120 f 5 7 Test plate and test piece sampling location ! Optional 7 . 1 fication tests, any one of the following test plates shall be used: Classification of test plates
22、 According to the classes of the technical quali- lb I t n (Nominal) Root face 0 . 5 max. i -=-I-+ a) b) C 7.2 A plate of group 3 specified in JIS K 6745 or a polyvinyl chloride of 50 MPa or over in tensile yield strength which is made flat under an appropriate forming condition. A polypropylene pla
23、te of 24.5 MPa or over in tensile yield strength which is made flat under an appropriate forming condition. Remarks : The tensile yield strength of polypropylene is referred to Annex to JIS K 6921-1. A high-density polyethylene plate of 19.6 MPa or over in tensile strength which is made flat under a
24、n appropriate forming condition. Remarks : The tensile strength of high-density polyethylene is referred to Annex to JIS K 6922-1. Shape and dimensions of test plate The shape and dimensions of test plate shall be as shown in Fig. 2. Unit: mm Fig. 2 Shape and dimensions of test plate and test piece
25、sampling location PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 08:15:30 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 Z 3831 : 2002 8
26、 Welding rod used for the test The welding rod used for the test shall be of 3 mm in diameter and shall conform to JIS K 6746 according to the type of the test plate, or those equivalent or superior thereto in performance. 9 Welding instrument used for the test and backing strip The welding in- stru
27、ment used for the test is not specified definitely. The material and shape of the backing strip is not specified either (groove may be given). 10 Precaution for welding In welding, care shall be taken for the following points: a) The test plate and welding rod can be cleaned and preheated properly i
28、n ad- vance of the welding work. b) The test plate is fixed using an appropriate jig so as to have as least distortion as possible. Welding is carried out at first on the front side and never carried out on the back side first. c) d) In the welding of a vertical position or a horizontal position, th
29、e vertical and horizontal directions of the test material are not allowed to be changed during a period from the start of welding to the end of it. The number of layers of weld is not restricted. Rod joint is not allowed. Bead formation in the course of welding is not allowed. e) f l g 11 Method of
30、judgement 11.1 Appearance test The appearance test shall be as follows: a) The appearance test is carried out on the test material. b) In the appearance test, the following items are evaluated visually or through measurement I 1) 2) 3) 4) 5) deformation. change in colour and shape of bead (front sur
31、face and back surface); height and width of excess weld metal; state of starting point and ending point of welding; state of fusion and penetration; 11.2 Tensile test The tensile test shall be as follows: a) Two tensile test pieces are sampled at the portions shown in Fig. 2 after weld- ing. The fin
32、ish of the test pieces is such that the front and back surfaces of the weld are machined flat to the surfaces of the plate and the width is made fiat in the dimensions shown in Fig. 2. b) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=I
33、HS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 08:15:30 MDTNo reproduction or networking permitted without license from IHS -,-,- 5. Z 3831 : 2002 Classification of test material (resin) Polyvinyl chloride plate c) The tensile test method is as specified in JIS K 7162 except t
34、hat the tensile speed is to be 50 mdmink 10 %. Tensile strength MPa 30 min. 12 Criteria for acceptance After carrying out the test, the following criteria for acceptance shall be satisfied: a) Unacceptable if any item in Criteria for evaluation in appearance test the appearance test is noticeably de
35、fective. Criteria for evaluation in tensile test After carrying out the tensile test, the tensile strength of two test pieces is required to be in compliance with Table 2. b) Table 2 Criteria for acceptance in tensile test I 15 min. I Polypropylene plate I I Polyethylene plate I 12 min. I PROTECTED
36、BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 08:15:30 MDTNo reproduction or networking permitted without license from IHS -,-,- Emta for JIS (English edition) are printed in
37、 Standarduation Journal, published monthly by the Japanese Standards Association, and also provided to subscriber:; of JIS (English edition) in Monthly Informution. Emta will be provided upon request, piease contact: Standardization Promotion Department, Japanese Standards Association 4-1-24, Akasak
38、a, Minato-ku, Tokyo, 107-8440 JAPAN TEL. 03-3.583-8002 FAX. 03-3583-0462 100% Recycled paper PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 08:15:30 MDTNo reproduction or networking permitted without license from IHS -,-,-