Practices for Injecting Energy Potentials Into Systems

DOE-STD-1030-96

installed jacking device or gag (i.e., a device designed to block off

or obstruct operation of a valve). The valve and its power (air)

supply isolation points must be tagged.

A pneumatically or solenoid-operated valve that fails closed is

NOT considered closed for lockout/tagout purposes unless its

power (air) supply is isolated and the valve is visually confirmed to

be closed. The valve and its power (air) supply isolation points

must be tagged.

A pressure operated valve or check valve CANNOT be used as an

isolation boundary valve unless it is physically restrained in the required

position by a gagging device approved by the facility.

A motor operated valve may be used as an isolation boundary point

provided that, after the valve has been positioned as required by the

lockout/tagout, its power supply is isolated and tagged.

The local control point (e.g., handwheel, manual operator) for a motor

or pneumatically operated valve must be locked/tagged when the valve is

used as an isolation boundary point. Any remote control points (e.g.,

control switches, reach rods) should also be tagged

4.2.3.5 Practices for Injecting Energy Potentials Into Systems and

Components for Testing

Lockouts/tagouts that are established to isolate a component, portion of a

piping system, or electrical circuit for the purpose of injecting an energy

potential for testing (e.g., hydrostatic test, local leak-rate test, electrical

insulation test, etc.) within the lockout/tagout boundary require special

consideration.

The lockout/tagout should be prepared in accordance with an approved

written procedure that specifically addresses the conduct of the test.

The initial lockout/tagout boundaries should be established to protect test

personnel and test equipment while test equipment is being connected to

the system or component. Other work within the area isolated for