321Seamless Stainless Steel tubess 1.Grade:304,304L,316,316L,321, ... on. 2.Standards:ASTM,JIS,DIN,GB ,etc 321 Seamless Stainless Steel PipeFeatures:1) pipe diameter : 6mm-630mm pipe thickness : ... Standards: /ASTM/ASME/DIN/JIS and etc4) Applications range: for use in the petroleum, chemical, medical equipment, boiler heat- ... inspection.11) Capacity:500 ton per month 321 Seamless stainless steel tube