JB/T 973-1977 Welded Cross Pipe Fittings

JB/T 973-1977 Welded Cross-type Pipe Fitting JB/T973-1977 Standard Download Decompression Password: www.bzxz.net

Standard of the First Machinery Industry Department of the People's Republic of China
Welded Cross-type Pipe Joints bZxz.net
JB973-77
Replaces JB973-67
This standard applies to cross-type pipe joints in oil-based pipeline systems, with a nominal pressure of 320kgf/cm2 and a working temperature of -25 to 80℃.
Marking example:
Outer diameter of pipe D. 18mm four-way pipe joint: Pipe joint 18JB973-77
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
Jinan Foundry and Forging Machinery Research Institute, etc.
Total 2 pages Page 2
Pipe outer diameter
Nominal through
Wrench size
JB973-77
Standard number
Technical conditions are in accordance with the provisions of JB1003--77. 1
TB2099·77
JB981-77
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. 12
GB1235-76
Rubber I-4
JB991-77
Joint body
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