... , EN, GB 1. Size: (6mm-630mm)*(1mm-45mm)2. Material: 200 series, 300 series, 400series3. Standard: ASTM, AISI, DIN, JIS, EN, GB 4. Surface ... , or as customers requirement NameStainless Steel tubeStandardASTM A554, A249, A269 and A270, A312 A304Material Grade201 ( Ni 0.8%),202 (Ni 3 ... test, water pressure test, crystal rot test, heat treatment, NDT 300 series TP 304 cold rolled Seamless Steel Pipe