The pressure rating of the pipeline includes two parts: The nominal pressure level of standard fittings expressed in nominal pressure; The wall thickness grade of standard pipe fittings expressed in wall thickness grade.

The raw materials commonly used in pipelines are: plates, pipes and forgings.There is the introduction of these three pipe weight calculation methods.

Sch 40 black steel pipe is uncoated steel, also known as black steel.

ASTM 53 Schedule 80 Pipe

Stainless steel yield strength test and inspection proces： tensile test and hardness test

A standard for the standardization of welded and seamless forged steel pipes covering high temperature or low pressure and high pressure.