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1、J IS JAPANESE I N DUSTR IAL STANDARD Translated and Published by Japanese Standards Association G-) JIS B 2302 :1998 Screwed type steel pipe fittings ICs 23.040.40 Descriptors : pipe fittings, pipes, pipe couplings, screwed fittings, steels, elbows (pipes) Reference number : JIS B 2302 : 1998 (E) Co
2、pyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 01:53:04 MDTNo reproduction or networking permitted without license from IHS -,-,- STD=JIS B 2302-ENGL 1398 W 4333608 OSb32b0 080 m B 2302 : 19
3、98 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Minister of International Trade and Industry through deliberations at Japanese Industrial Standards Committee in I accordance with the Industrial Standardization Law. Consequently JIS B 2302
4、: 1995 is replaced with JI$ B 2302 : 1998. For the purpose of this revision, as the standards for performance test methods of the equipments for water supply service (series of JIS S 3200) have been established, this Standard refers to them in the provisions of quality test. Date of Establishment: 1
5、950-03-30 Date of Revision: 1998-05-20 Date of Public Notice in Official Gazette: 1998-05-20 Investigated by: Japanese Industrial Standards Committee Divisional Council on Machine Elements JIS B 2302 : 1998, First English edition published in 2000-05 Translated and published by: Japanese Standards A
6、ssociation 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by an
7、y means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 0
8、1:53:04 MDTNo reproduction or networking permitted without license from IHS -,-,- c Screwed type steel pipe fittings 1 Scope This Japanese Industrial Standard specifies screwed type steel pipe fit- tings(1) used for ordinary pipings for water, oil, steam, air, gas or the like (hereafter referred to
9、as “fittings”). Note (1) To be used for carbon steel pipes for piping specified in JIS G 3452, and those coated with resin are used mainly for resin-lined steel pipes for water service. 2 Normative references The following standards contain provisions which, through reference in this Standard, const
10、itute provisions of this Standard. The most recent editions thereof shall be applied. JIS B 0203 Taperpipe threads JIS B 0253 Gauges for taper pipe threads JIS B 2301 Screw type malleable cast iron pipe fittings JIS G 3452 Carbon steel pipes for ordinary piping JIS H 0401 Methods of test for hot dip
11、 galvanized coatings JIS S 3200- Equipment for water supply service-Test methods o, pressure 3 Classification Fittings shall be classified as follows: ydrostatic a) To be classified by the shape into four types of barrel nipple, close nipple, long nipple and socket. To be classified by the surface c
12、ondition into three types of non-plating, plating and resin-coating. b) 4 Size designations The size of fittings shall be designated by the nominal sizes of thread of the fittings derived from JIS B 0203. For these designations symbols of R and R, shall be omitted. For long nipples, the size shall b
13、e designated by the fitting size x length, L. 5 Quality 5 . 1 Threads The threads of fittings shall be taper external threads specified in JIS B 0203. For the sockets, however, parallel internal threads specified in JIS B 0203 shall be used. 5 . 2 Thread axis alignment For the barrel nipple and clos
14、e nipple, the angular deviation between the axes of the threads shall be within 2 mm for an interval of 300 mm. 5 . 3 Leakage tightness Fittings, when tested by the method of Annex 2 or Annex 3 of JIS S 3200-1, shall be free from any leakage. For this test a pneumatic pressure of 0.5 MPa shall be ap
15、plied. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 01:53:04 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS B 2302-ENGL 1998 4933b08 0563262 953 2 B 23
16、02 : 1998 5.4 Pressure proof Fittings, when tested by the method in the text of JIS S 3200- 1, shall not be generated breakage or other abnormalities. The hydrostatic pres- sure to be applied for this test shall be 2.5 MPa. 5.5 Plating Where required plating on the fitting, a zinc coating shall be a
17、pplied by the hot-dipping prior to the threading process, and the plating layer shall be laid uniformly on the plated surface. For the nipples, plating may be applied before material cutting process. The number of immersions in the cupric sulphate test for inspec- tion of the minimum layer thickness
18、 of the plated fittings shall be five times or more. 5.6 Resin-coating For application of resin-coating on the inner surface of fittings, it shall be done after threading, and the method and the quality shall be in accor- dance with 6.6 of JIS B 2301. 5.7 Shape and dimensions The shape and dimension
19、s of fittings shall be as given in Attached Tables 1 to 3. 5.8 Appearance The inner and outer surfaces of the fitting shall be smooth and free from such defects as cracks, harmful flaws and burrs. Further, there shall not be such defects as injurious thinning or chipping on the useful threads of fit
20、tings. 6 Materials The material of fittings shall be steel pipes specified in JIS G 3462 or at least equivalent in quality thereto. 7 Inspection 7.1 Division of inspection and inspecting items The inspection of fittings shall be divided into type inspection and delivery inspection, and the inspectin
21、g items shall be as follows respectively. The sampling processes for type inspection and delivery inspection are left to the agreement between the parties concerned with delivery. a) Type inspection items i) Thread inspection 2) Thread alignment inspection 3) Leak tightness inspection 4) Pressure pr
22、oof inspection 5) Plating inspection 6) Resin inspection 4 7) 8) Inspection of internal resin-coating film Inspection of shape and dimensions 9) Appearance inspection b) Delivery inspection items i) Thread inspection Copyright Japanese Standards Association Provided by IHS under license with JSALice
23、nsee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 01:53:04 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS B 2302-ENGL 1998 = 4933608 05b3263 89T c L 3 B 2302 : 1998 2) Thread alignment inspection 3) Inspection of internal resin-coating fil
24、m 4) Inspection of shape and dimensions 5) Appearance inspection 7.2 gauges of JIS B 0253, and shall result in conforming to the requirements of 5.1. Thread inspection The thread inspection shall be carried out by using thread 7.3 Thread alignment inspection The thread alignment inspection shall res
25、ult in conforming to 5.2. 7.4 forming to 5.3. Leak tightness inspection The leak tightness inspection shall result in con- 7.5 5.4. Pressure proof test The pressure proof test shall result in conforming to 7.6 4 of JIS H 0401. Plating inspection The plating inspection shall result in conforming to 5
26、.5. For the inspection, the method of cupric sulphate test shall be as specified in clause 7.7 Resin inspection The resin used for resin coatings shall be inspected according to 8.7 of JIS B 2301, and meet the requirements of 5.6. 7.8 Inspection of internal resin coating film The internal resin film
27、 of resin coated fittings, when inspected by 8.8 of JIS B 2301, shall meet the requirements of 5.6. 7.9 sions shall result in conforming to 5.7. Inspection of shape and dimensions The inspection of shape and dimen- 7.10 Appearance inspection The appearance inspection shall result in conforming to 5.
28、8. 8 Designations Fittings shall be designated with the number or title of this Stan- dard, classification and fitting size. The classification by the surface condition may be designated as black for non-plating type and white for plating type. Example 1 JIS B 2302 Barrel nipple Black Y 4 Example 2
29、Screwed type steel Long nipple Plating % x 75 pipe fitting II II II II (Type of ) ( Type of the Number or title of this Standard the shape surface condition Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Res
30、ale, 03/12/2007 01:53:04 MDTNo reproduction or networking permitted without license from IHS -,-,- 4 B 2302 : 1998 9 Markings 9.1 Fittings shall be marked with the fitting size and manufacturers name or abbreviation. For those impossible to be marked directly, these shall be marked by attaching a ta
31、g and the like on each package. Marking on products 9.2 mation. Marking on package The package shall be marked with the following infor- 4 a) Classification (2) b) Fitting size c) Number of contents d) Manufacturers name or abbreviation Note (2) The type of the surface condition may be marked as bla
32、ck for non-plating and white for plating. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 01:53:04 MDTNo reproduction or networking permitted without license from IHS -,-,- STD*JIS B 2302-E
33、NGL 1998 I 4933b08 05b32b5 bb2 W 28 34 “8 Y 2 5 B 2302 : 1998 26 29 Attached Table 1 Barrel nipples and close nipples 3 / 4 1 Barrel nipple - _L 38 35 42 38 k L Close nipple f3 Unit: mm Close nipples L (min.) L (min.) 26 24 1 I4 I 50 I 4 1 I Remarks 1 The dimensions of the pipe used for these nipple
34、s are in accor- dance with JIS G 3452. 2 End faces of the threads shall be chamfered. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 01:53:04 MDTNo reproduction or networking permitted wit
35、hout license from IHS -,-,- STD-JIS B 2302-ENGL 1998 4933b08 05b32bb 5T9 M 6 B 2302 : 1998 Attached Table 2 Long nipples 1 I . ( L 3 Remarks 1 The dimensions of the pipes used for these nipples are in accordance with JIS G 3452. 2 End faces of the threads shall be chamfered. I c Copyright Japanese S
36、tandards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 01:53:04 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS B 2302-ENGL 1998 m 4933608 05632b7 435 W 7. B 2302 : 1998 Attached Tab
37、le 3 Sockets Unit: mm Remarks : End faces of the thread shall be chamfered. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 01:53:04 MDTNo reproduction or networking permitted without licen
38、se from IHS -,-,- STDmJIS B 2302-ENGL 1778 9 4933608 0563268 371 m t . Errata for JIS (English edition) are printed in Standardization Jouml, published monthly by the Japanese Standards Association, and also provided to subscribers of JIS (English edition) in Monthly Information. Enata will be provi
39、ded upon request, please contact: Standardization Promotion Department, Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN TEL. 03-3583-8002 FAX. 03-3583-0462 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/12/2007 01:53:04 MDTNo reproduction or networking permitted without license from IHS -,-,-