... ASTM,ASME,DIN,GB 2.Material:Alloy Certification:ISO9001:2008 Big and Small Head Forge Piece1.Standard:ANSI,ASTM,ASME ,DIN,GB2. ... requirement 4.Process:centrifugal casting5.Quality:can work under presure for long time,advanced testing equipment to ensure thye quality,6 ... :ISO9001:200810.Payment:L/C,T/T11.Application:Used for methanol production conversion furnace Big and Small Head Forge Piece