JB/T 971-1977 Welded right angle pipe joints

JB/T 971-1977 Welded right angle pipe joint JB/T971-1977 Standard download decompression password: www.bzxz.net

The First Machinery Industry Department of the People's Republic of China Standard Welded Right Angle Pipe Joint wwW.bzxz.Net
JB971-77
Replaces JB971-67
This standard applies to right angle pipe joints in oil-based pipeline systems, with a nominal pressure of 320kgf/cm2 and a working temperature of -25~80℃.
Marking example:
Tube outer diameter D. 28mm right angle pipe joint: pipe joint 28JB971--77
The First Machinery Industry Department of the People's Republic of China issued the First Machinery Industry Department Standardization Research Institute proposed to implement on May 1, 1977
Jinan Foundry and Forging Machinery Research Institute and others drafted 331
Tube outer diameter milk
Nominal diameter
JB971-77
Standard number
Wrench size
Technical Technical conditions are in accordance with the provisions of JB100377
JB2099-77
JB981-77
GB1235-78
Rubber [-4
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. 332
JB989-77
Joint body
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