Specifications

JIS G3460 Steel Pipes for Low Temperature Service
Grade STPL380
Grade STPL450
Grade STPL690

  

JIS G3460 Steel Pipes for Low Temperature Service

1. Scope
This Japanses Industrial Standard specifies the steel pipes, used for pipe at exceptionally low temperatures of freezing point or under.

2. Steel Grade
JIS G3460 Grade STPL380
JIS G3460 Grade STPL450
JIS G3460 Grade STPL690

3. Method of Manufacture
3.1The pipe of STPL 380 shall be manufactured by the seamless or electric resistance welding process and that of STPL 450 and 690 by the seamless process, and all the pipes
hall be made from the fine-grained killed steel.
3.2 The pipe of STPL 380 and STPL 450 shall be subjected to normalizing or normalizing followed by tempering, and that of STPL 690 shall be double normalized followed by
tempering or quenched and tempered. However, the heat treatments other than mentioned above shall be agreed upon by the purchaser and the manufacturer.
3.3 When requested by the purchaser, the pipe may be furnished with the bevel end

4. The details of chemical composition and mechanical properties, please check G3460.