... equipment WP:High pressure API well head parts High-pressure union, importing international advanced technology, is forged with high-strength alloy steel ... in API 6A products as following:1) Wellheads (casing/tubing head, crosses ,flange adapter,etc)2) Valve (FC/FLS gate valve ... valve, etc)3) Fitting(union, manifold,elbows), bop. API well head parts