... :316,304 4.apply:boiler,heat-exchanger,condenser 304 seamless and welded steel tubeOur company is professionally specializing in seamless pipe for ... Steel , Anshan Steel etc.1. material:TP304,304L,304H,304LN,TP310,310S,TP316,316L,TP317L,TP321,321H,TP347,TP347H,etc.2. standard:ASTM ... A269,ASTM A312,ASTM A213,GB2270-80, GB/T14975-94,GB/T14976-94 ...