... 304, AISI 304L, AISI 316, AISI 316L 3) Standard : ASTM A55 ASTM A554 Stainless Steel Tube:The Roundness is very accurate;The ... guards, etc and also for running water pipes.StandardManufacturing Standard : ASTM A554MaterialGrade : AISI 201, AISI 202, AISI 304, AISI 304L, AISI ... by plain plastic bags and outer package by steel boxes. ASTM A554 Stainless Steel Tube