... level:L,P,R,S,T,U,V Suitable medium:Petroleum,Natural gas,Mud Material level:AA~FF 1 ... hangere for tubing head has straight type seat bore and 45°cone of hanging shoulder, with strong loading ability ... bottom flange sets secondary seal mechanism and sealing test port.4.Tubing hanger and tubing head adaptor can be penetrated ... with BPV thread as required. API 6A oil and gas equipment Tubing & Casing Head