JB/T 970-1977 Welded straight pipe joint

JB/T 970-1977 Welded Straight Pipe Fittings JB/T970-1977 Standard Download Decompression Password: www.bzxz.net

The First Machinery Industry Department of the People's Republic of China standard welded straight pipe joint
JB970-77
Replaces JB97067
This standard applies to straight pipe joints in oil-medium pipeline systems, with a nominal pressure of 320kgf/cm and a working temperature of -25~80℃.
Marking example:
Pipe outer diameter D. 28mm straight pipe joint: pipe joint 28JB970-77bZxz.net
The First Machinery Industry Ministry of the People's Republic of China issued the First Machinery Industry Ministry Standardization Research Institute proposed to implement on May 1, 1977
Jinan Foundry and Forging Machinery Research Institute and others drafted 329
Pipe outer diameter
Nominal diameter
JB970-77
Wrench size
Standard number
JB2099-77
Technical conditions are in accordance with the provisions of JB1003-77. Joint
JB981-77
GB1235-76
O-ring
Rubber I-4
Number nominal gauge
Application of seamless steel pipe materials are 15, 20 steel, and the precision is ordinary grade. 330
M12×1.25
M36×2
M42×2
M52×2
M60×2
JB988-77
Connector body
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