wellhead equipment working pressure: 2000~15000psi nominal size: 2 1/16~4 ... , AA~FF,PR1, P.U connect: flange,clamp wellhead equipment 1.Fix drilling wellhead, connect wellhead casing string, seal and control the annular of ... test service 2.Consist of casing head, tubing head and Christmas tree 3.Apply to all kinds of casing, tubing programs and ... LU) 8.Material class: AA,BB,CC,DD,EE,FF wellhead equipment