Pipes And Fittings 1.Material:TP304/304L,316etc 2.O. ... before:A:Size check B:UT test C:light spectrum check2 Productive Process of check3 Agreementon Preshipment Inspection:A: ... D: metallographic analysis E: light spectrum checkColour:Black,yellow,Red,Blue,Green,Silvery and no colour and as Customers’ inquriymentMarking: Materal+Size ... Detail:As Customers’ inquiryment All Kinds Of Pipes And Fittings