Quantcast Unfired Pressure Vessels-External Inspection-Continued - mo322_20124

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MECHANICAL
Unfired Pressure Vessels-Internal Inspection-Continued
corrosion
grooving
lap seam cracks
cracked or severely corroded rivets
cracked welds. Determine minimum thickness and calculate new
maximum allowable working pressure
n Heads:
cracks
deformation
excessive corrosion
n Stays and Braces:
cracks
bends
looseness
excessive tension
excessive corrosion or erosion
loose, cracked or broken connections
n Nozzles:
distortion
excessive corrosion
cracked welds
loose, cracked or severely corroded rivets or bolts
poor or ineffective threaded conditions
n  Reinforcing Plates:
cracks
deformations
other weaknesses
n Openings and Connections for Piping and External Attachments:
obstructed
inadequate
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