JB/T 972-1977 Welded three-way pipe joint

JB/T 972-1977 Welded Tee Pipe Fitting JB/T972-1977 Standard Download Decompression Password: www.bzxz.net

Standard of the First Machinery Industry Department of the People's Republic of China bzxZ.net
Welded three-way pipe joints
972-77
Replaces JB97267
This standard applies to three-way pipe joints in oil-based pipeline systems, with a nominal pressure of 320kgf/cm\ and a working temperature of 25~80℃.
Marking example:
Outer diameter of pipe D. 18mm three-way pipe joint: Pipe joint 18JB972-77
Issued by the First Machinery Industry Ministry of the People's Republic of China
First Machinery Industry Ministry Standardization Institute
Implementation on May 1, 1977
Drafted by Jinan Foundry and Forging Machinery Research Institute, etc. 9
Total 2 pages Page 2
Pipe outer diameter
Wrench size
JB97277
Standard number
Technical conditions shall be in accordance with the provisions of JB1003-77. 1
JB2099-77
JB981-77
Parts nominal
M12×1.25
M36×2
M42×2
M52×2
M60×2
The material of the seamless steel pipe is 15, 20 steel, and the precision is ordinary grade. 3
GB1235-76
Rubber I-4
JB990-77
Joint body
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