... Standard:ASTM A304,A316L,A201 OD:1/4"-30" Seamless pipe and welded steel pipe Seamless Stainless Steel PipeFeatures:1) pipe diameter : 6mm-630mm ... use in the petroleum, chemical, medical equipment, boiler heat- exchanger and other fields.5) Packing:standard export packing.6) Payment:by ... ,316,316L,321,317L,310S,904L and so on. 2.Standards:ASTM,JIS,DIN,GB and so on. 316 seamless stainless steel pipe