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General Rules For Energy Isolation

General Rules For Energy Isolation

Dec 12, 2019

General rules for energy isolation

1 applicable conditions for energy isolation

When entering, transforming or maintaining a certain equipment, facility or device, external energy should be cut off to avoid accidental release of energy. Such as power sources, fluid and pressure sources, mechanical drives and control systems.

2. Provisions for electrical isolation

Device source power off and locked; Such as power distribution sources for equipment, facilities and installation systems;

The signal isolation is a special form of electrical isolation, which is completed in the form of isolation and bypass.

Mechanical isolation regulations

Process isolation method

Single valve isolation

Double valve isolation and discharge method

Single valve isolation plus blind plate

Isolation of confined space entry

Pipeline disassembly isolation method

Double partition and insert blind board method

General requirements for isolation operations

To control by issuing quarantine certificates;

The isolator and the isolator shall not be the same person;

Process isolation selection diagram should be used as the basis for determining mechanical isolation method or type;

If there is any change, the feasibility of risk assessment to identify the risk and isolation;

Qualification of isolator;

On-site verification prior to quarantine;

Each isolation point should have a separate label and padlock.

Particular requirements for isolation of oil and gas pipelines

Single valve isolation and oil and gas pipeline isolation;

If the valve can not be locked in the closed position, set a person to continue to monitor;

The operation under single-valve isolation should be short term, if too long, should consider changing the operation method;

Do not heat work in a single - valve isolated area.

The basic elements of an isolation certificate

Equipment and purpose of isolation

Segregation applicant

Approval of the quarantine application

Information for all isolation points

Isolation method

Isolation type

Line instrument diagram (P&ID)

Time of isolation

Isolator's signature

Effect of isolation

Release time