welding neck flange 1,Standard:ASME,ANSI,JIS,DIN,BS ect. ... ,Material:stainless steel 3.Certification:ISO9001:2000 4,OEM Socket welding FlangeWe will Reply you within 24 hoursProductsFlange,pipe fitting,valveMaterialvarious ... be negotiated.Others:Pls send us the detailed reuqirment of welding neck flange.Such as size,material,standard and so on ...