Stainless steel pipe manufacturers
For steel pipes under fluid pressure, hydraulic test and radiographic testing must be carried out to check their pressure resistance and quality. No leakage, wetting or expansion under the specified pressure is qualified. Some steel pipes must be carried out according to the standard or the demander’s requirements. Crimping test, flaring test, flattening test, etc.
Seamless stainless steel pipe, also called stainless steel seamless pipe, is made of steel ingots or solid pipe billets through perforation and then made by hot rolling, cold rolling or cold drawing. The specifications of seamless steel pipes are expressed in millimeters of outer diameter * wall thickness.
The full name of 304 stainless steel pipe is SUS304 stainless steel pipe.
SUS304stainless steel pipeStainless steel pipes belonging to American grades, domestic grades are equivalent to 0Cr19Ni9 stainless steel pipes, and are usually replaced by 0Cr18Ni9.
The mechanism of stainless steel rust prevention is that alloy elements form a dense oxide film, which isolates oxygen from contacting and prevents continued oxidation. So stainless steel is not "stainless".