... B16.9Material:alloy steel,Carbon steel,Stainless steelPlace of Origin:ShangHai CityMaterial Standard:ASTM A335,A234,A213 ... ,A53,A106,API,Quality Control:1 Materials into the factory inspection before:A:Size check B:UT ... checkColour:Black,yellow,Red,Blue,Green,Silvery and no colour and as Customers’ inquriymentMarking: Materal+Size+W.T ... Detail:As Customers’ inquiryment All Kinds Of Pipes And Fittings