stainless steel seamless pipe: Standard: ASTM A213,A269,A511,A312,A270 Grades:TP304,304L,316,316L,317L,310S,321,347,s30813 Stainless Steel Precision Tube Specification: ASTM A213 ... ,A269,A511,A312,A270 Grades:TP304,304L,316,316L,317L,310S,321,347 ...