321Seamless Stainless Steel tubess 1.Grade:304,304L,316,316L,321,317L,310S, ... on. 2.Standards:ASTM,JIS,DIN,GB ,etc 321 Seamless Stainless Steel PipeFeatures:1) pipe diameter : 6mm-630mm pipe thickness : 0.8mm ... part inspection.11) Capacity:500 ton per month 321 Seamless stainless steel tube