... steel 3.Standard: ANSI, JIS, DIN, UNI, Carbon steel flanges weld neckANSI B16.5 FlangesWe are Factory Outlet & Offer OEM Service ... -805.Types: plate, slip on, welding neck, blind, thread, socket weld flange6.Process: free forging, plate cutting, heat treat, machining7.Surface ... Steel:F304,F304L,F316,F316L,316Ti etc Carbon Steel Flanges weld neck