... Connecting typeraised face flange end, flat face flange end, ring joint flange end, but wedding end, socket welding, NPT screwed ... face dimensions : ANSI B16.10 or API6DWe specializes in designing and producing forged material, wellhead equipment( API 6A valves), API ... parts, x-mas tree, manifold, BOP, tubing head, casing head, tee, spool, hanger, flange and OEM service too. we have the certifications ...