Regarding the seamless steel pipe standards, the range of operating temperatures and pressures is not specified
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For example, GB/T8163 and GB6479 do not specify exact temperature and pressure ranges
The GB/T8163 standard specifies relevant wall thickness grades, and the pipe wall thickness should be selected based on the pressure of the process medium
Agree with the original poster’s view. The American standard system covers these aspects in a fairly comprehensive manner
Our pipeline standards only specify the specifications of the pipes; for materials, temperature, etc., other regulations and standards need to be referred to
1. The pressure capacity of a pipe is calculated based on its wall thickness: d = P × D / (2 + P) + 2 – 3 mm, where d represents the thickness, P represents the pressure, and the value in parentheses represents the allowable stress of the material at the design temperature; D represents the outer diameter. 2. For 20# steel, there are two variants: 20g and 20#. The operating temperature for 20# steel generally should not exceed 250 degrees Celsius.
Each type of pipe has a suitable temperature range. You can take a look at the design specifications for industrial metal pipes; they are quite detailed there
Is there a standard for this type of 3/4’ steel pipe?~~~