909 Offshore Oil and Gas Safety II

Equipment and Piping Isolation

• Isolation should be in place and proven effective before work begins and remain in place during the work activities.
• Properly isolate, release pressure, and de-energize equipment and associated piping before any work is done.
• Use lockout and tagout as appropriate and use of safety blinds and/or valves to secure piping associated with serviced equipment.
• A work permit should be issued before starting the work after breaking the integrity of piping or equipment.
• Use safety equipment, such as fire extinguishers and respiratory protection, if there is potential to expose the worker to hazardous substances.
• Isolate the piping in accordance with current regulations and company practices when breaking the integrity of hazardous or harmful piping under pressure.

• Lock and tag valves with "Do Not Operate", and clearly mark all blinds and blanks.
• When safety blinds are installed, keep a record of blind number, location, size, and pressure rating and blinds.
• Correctly pressure rate gaskets for their specific service.
• Install gaskets used in conjunction with blinds where possible, on both sides of the blind.
• Keep a record of the location and position of valves left in for isolation, for example, open or closed.
• Check the isolation log to verify that all blinds have been removed and that all valves have been put back to normal operating position before removing locks, blinds or valves.
• Disconnect, blind, or isolate all associated piping using the double block and bleed method when isolating equipment for confined space entry.

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