Understanding API ICP653 Reading 7-Worksheet-04 Part1

9.13 Repair/Replacement of Floating Roof Seals
9.13.1 Rim mounted seals can be removed, repaired or replaced. Items for
consideration are:
a. Minimize evaporation/personnel exposure by limiting seal segment removal
to 1/4 of the seal at one time.
b. Use temporary spacers to keep roof centered.
c. In-service repair may be limited to seal component parts or high positioned
vapor seals.
9.13.2 Secondary seals can normally be "in-service" repaired or replaced.
9.13.3 Seal-to-Shell Gap
Corrective action includes:
a. Adjusting hanger system or primary shoe seal types.
b. Adding foam filler to toroidal seals.
c. Increasing length of rim mounted secondary seals.
d. Replacement (all or part) of the primary system.
e. Adding a rim extension to install secondary seal.
Charlie Chong/ Fion Zhang