A group of employees are assigned to replace the head seals on twelve large nitrogen pressure vessels (accumulator bottles) at a manufacturing facility. Each pressure vessel has an operating pressure of about 5,000 psig. Replacement of the seals on each vessel requires that its head be opened, releasing any vessel contents to the atmosphere. The vessels lack individual gauges to indicate internal pressure levels.
Did the pressure within the nitrogen vessels constitute Hazardous Energy?
Were the employees performing a Servicing and/or Maintenance operation that was subject to unexpected energization, start up, or release of Hazardous Energy?
Does the Lockout/Tagout standard apply to this particular Servicing and/or Maintenance operation?
Would the group Lockout or Tagout provisions apply to this operation?
Is the employer required to use a work authorization permit?
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