... 321,F321,316,316L 3.Standard:GB,DIN,AISI,,ASTM,JIS,EN 4.Factory direct,best price ... Pipe Material Grade: 304, 304L, 316, 316L, 321, 317, 317L, etc. Outside Diameter: 3.18mm-630mm, Wall ... 5Grade304, 304L, 321, F321, 316, 316L, 310S, 317, 317L, 347H, 2205Duplex Steel and as requestProcess techniqueCold ... delivery, competitive price and best service! AISI,ASTM,JIS,DIN,EN Stainless Steel Seamless Pipe