... 321/H, 310,310S, etc.2) Standard: ASTM A312, ASTM A269, ASTM ,A511, ASTM A2133) Size: OD: 6(mm)--830(mm ... oval pipes, special shaped pipes, empaistic pipes, fittingsStandardASTM A554, A249, A269 and A270Material Grade201: Ni 0.8%~1%202: Ni 3.5 ... chemical industry, environment protection, traffic, metallurgy,mine, printing and dyeing, medical equipment, and so on. Any of your inquiries would be highly ...