astm standard stainless steel welded pipe 1)O.D:15mm-1500mm W.T:0.8mm- ... ,321,304,304L,316,316L,317 astm standard stainless steel welded pipeFeatures:1) pipe diameter : 15mm-1500mm pipe thickness : 0.8mm ... case, or as per customers' requirements astm standard stainless steel welded pipe