Stainless Steel Pipe Manufacturer various specifications and materials can be customized 321 Seamless Stainless Steel Pipe 1) Name 321 Seamless stainless steel pipe & tube2) Standard ASTM A 312,213,269, GB/T 14975-02, GB/T 14976-02 etc.3) Material201, 202, 301, TP304, TP304L, TP316, TP316L, 321, 310S, SUS304, SUS304L, SUS316, SUS316L, SUS321, SUS310S etc.4) Outside diameter1/8''-24'' 6mm-630mm5) ...