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 MECHANICAL
Unfired Pressure Vessels-External Inspection-Continued
stems bent
n Rupture Disks:
burst
leaking
deteriorated
plugged vent
n Pressure Indicating Gages:
broken, missing or dirty glass
illegible markings
bent pointer
leaking connections
inoperative
n Lagging:
loose or missing material
cracks
open seams
evidence of vapor or water leaks
n Shell:
corrosion
leakage
cracks
distortion
cracked or broken welds
loose or cracked rivets
loose or missing caulking
n Supports:
settlement
lack of rigidity
6-38
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