... to produce API and oilfield wellhead x-tree, welcome to contact us. Introduction Christmas trees /X-tree as per API 6A , both ... for different casing and tubing programs and pressure grades. The X-mas tree is connected by flange or couplings. Features -Fix the ... be equipped with pneumatic (hydraulic) safety valve Specification of the X-tree Working pressure (psi) 2M, 3M, 5M, 10M, 15M, 20K ...