UFC 3-460-03
21 JANUARY 2003
SHELLS
External Visual Inspection
1. Visually inspect for paint failure, pitting, and
ٱ
corrosion.
ٱ
2. Inspect the bottom-to-foundation seal (if applicable)
Internal (Floating Roof Tank)
Visually inspect for grooving, corrosion, pitting, and
ٱ
coating failure.
Wind Girder (Floating Roof Tank)
1. Inspect wind girder and handrail for corrosion damage
(paint failure, pitting, and corrosion product buildup -
ٱ
especially where it occurs at tack-welded junctions) and
broken welds.
2. Check support welds to the shell for pitting, especially
ٱ
on shell plates.
3. Note whether supports have reinforcing pads welded to
ٱ
the shell.
SHELL APPURTENANCES
Manways and Nozzles
1. Inspect for cracks or leaks on weld joints at nozzles,
ٱ
manways, and reinforcing plates.
2. Inspect for shell plate dimpling around nozzles caused
ٱ
by excessive pipe deflection.
ٱ
3. Inspect for flange leaks and leaks around bolts.
ٱ
4. Inspect insulation seal around manways and nozzles.
Tank Piping Manifolds
ٱ
1. Inspect manifold piping, flanges, and valves for leaks.
ٱ
2. Inspect firefighting system components.
3. Check for anchored piping that would be hazardous to
ٱ
the tank shell or bottom connections during earth
movement.
4. Check for adequate thermal pressure relief of piping to
ٱ
the tank.
5. Check regulator operation for tanks with purge gas
ٱ
systems.
6. Check sample connections for leaks and proper valve
ٱ
operation.
7. Check temperature indicators for damage and test their
ٱ
accuracy.
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