... EN GB material:200/300/400 series The stainless steel pipeStandardASTM,DIN 17458-85,DIN17456-85,JIS G ... 91,GB9948-88,Material201,202,301,304,304L,310,310S,316,316L,317,317L,321,406,409 ... ,NO.2,HL,16KProduction treatmentSeamless steel pipeWelded steel pipeSurface treatmentPolishing or notStainless steel pipe can be non –standard orderedPICTURES ... ,earlier booming!!! ASTM/ASME A312 A213 stainless steel pipe