Quantcast Unfired Pressure Vessels

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Steam Utility System-Continued
Expansion loops
Expansion joints
Steam traps
Alignment of guides and roller supports
Check trouble logs for recurring outages or areas that require
continuing repairs
Have steam pits opened and check for condition and water intrusion
n Proper pressure drop across pressure reducing stations:
n  Hanger and support condition:
6.2.16 Unfired Pressure Vessels: Comply with all applicable safety precautions.
This procedure does not include all requirements and specifications to perform this in-
spection. Refer to NAVFAC MO-324 "Inspection and Certification of Boilers and Un-
fired Pressure Vessels" for more information. Inspectors must obtain and possess a
valid NAVFACENGCOM Certificate of Competency and a current license issued by
the geographic Engineering Field Division/Engineering Field Activity (EFD/EFA).
Contracted inspectors must possess a state certificate and a current license issued by the
EFD/EFA. Before entering an unfired pressure vessel make sure that it has been
properly ventilated, that there is no inflammable gas or toxic material present, that all
valves on connecting pipes are closed, and that a reliable method is used to safeguard
these valves while anyone is inside the vessel. When electric cords are used inside an un-
fired pressure vessel they should be in good condition, well insulated, designed to
withstand mechanical injury, and provided with a suitable guard. Naked lights are
prohibited. From previous inspection reports, indicate decrease in pressure-carrying
capacity and note any recommendations in previous reports not completed or not
scheduled for completion. Check for:
n Safety and Relief Valves:
accumulated rust, scale or other debris
obstructed drain
hazardous conditions created by discharge
levers do not operate freely


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