![]() ![]() Unrestricted bleed within 10 minutes after ESD activation. You may allow for closure of the tree valves immediately prior to closure of the surface-controlled SSSV if desired. (5) Subsea ESD (MODU or other type of workover vessel, Dropped object) Initiate unrestricted bleed within 60 minutes after ESD or sensor activation. Initiate unrestricted bleed within 60 minutes after ESD or sensor activation Close all tree valves within 10 minutes after ESD or sensor activationĬlose within 10 minutes after ESD or sensor activation If you use a 60-minute manual resettable timer you must initiate unrestricted bleed within 24 hours.Ĭlose one or more valves within 2 minutes and 45 seconds after ESD or sensor activation. If you use a 60-minute manual resettable timer you must initiate unrestricted bleed within 24 hours If you use a 20-minute manual resettable timer, you may continue to reset the time for closure up to a maximum of 60 minutes total If you use a 5-minute resettable timer, you may continue to reset the time for closure up to a maximum of 20 minutes totalĬlose within 20 minutes after ESD or sensor activation.Ĭlose within 20 minutes after ESD or sensor activation. Initiate unrestricted bleed within 24 hours after sensor activation.Ĭlose within 45 seconds after ESD or sensor activationĬlose within 5 minutes after ESD or sensor activation. ![]() If you use a 60-minute manual resettable timer, you may continue to reset the time for closure up to a maximum of 24 hours total Close the designated USV1 within 20 minutes after sensor activation.Ĭlose within 60 minutes after sensor activation. Valve Closure Timing, Electro-Hydraulic Control System If you have the following.Ĭlose within 45 seconds after sensor activationĬlose one or more valves within 2 minutes and 45 seconds after sensor activation. Welding and burning practices and procedures. Time delays on pressure safety low (PSL) sensors. Temporary quarters and temporary equipment. Pressure vessels (including heat exchangers) and fired vessels.įloating production units equipped with turrets and turret-mounted systems. Production system requirements - general. What are the maximum allowable valve closure times and hydraulic bleeding requirements for a direct-hydraulic control system?ĭesign, installation, and maintenance - general.Īpproval of safety systems design and installation features.Īdditional Production System Requirements What are the maximum allowable valve closure times and hydraulic bleeding requirements for an electro-hydraulic control system? Specification for all boarding shutdown valves (BSDVs) associated with subsea systems.Įmergency action and safety system shutdown - subsea trees. Specification for underwater safety valves (USVs). Subsurface safety devices in injection wells - subsea trees.Īlteration or disconnection of subsea pipeline or umbilical.Īdditional safety equipment - subsea trees. Subsurface safety devices in shut-in wells - subsea trees. Subsea tree subsurface safety devices - general.ĭesign, installation, and operation of SSSVs - subsea trees. Subsea and Subsurface Safety Systems - Subsea Trees Specification for surface safety valves (SSVs).Įmergency action and safety system shutdown - dry trees. Temporary removal of subsurface safety devices for routine operations. Subsurface safety devices in injection wells - dry trees. Subsurface safety devices in shut-in wells - dry trees. Surface and Subsurface Safety Systems - Dry Treesĭry tree subsurface safety devices - general.ĭesign, installation, and operation of SSSVs - dry trees. What SPPE failure reporting procedures must I follow?Īdditional requirements for subsurface safety valves (SSSVs) and related equipment installed in high pressure high temperature (HPHT) environments. Safety and pollution prevention equipment (SPPE) certification. ![]()
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