1.Application to connection at locations when drill platform, semi-submersible drilling vessel or drilling vessel moves relatively and the installation dimensions of the drill rig subsequently change, and to delivery of oil, gas, mud and other high pressure media including mainly relief line, blowout control line and choke kill line ).
    2.Application standard: API Spec 16C   
                                    SY/T5323-2004
    3.The product features resistance to high pressure, thermal insulation, anti-flaming and fire resistance as well as inner wall with high abrasion resistance.