Annex C 6 terms During an in-service inspection of a tank, the site around the tank should be checked to make sure:

Water drains away from the tank and associated piping manifolds

The indication of standing water and significant sagging on a fixed cone tank roof during a tank in-service indicates:

Potential rafter failure

When a tank is out-of-service the bottom interior surface may be quickly checked for pitting, blisters, low or high spots, etc. by using:

A flashlight close to and parallel with the tank bottom.

The condition (if applicable) of an internal sump of an out-of-service tank should be checked by:

Removing any liquid to allow for complete inspection.

If an emergency drain is not at the center of an external floating roof, how many emergency drains should the roof have?

3

If the floating swing line in a floating roof tank does not have a limiting device preventing the swing line from exceeding 60 degrees, measure and calculate the maximum angle on the overflow. If calculated angle exceeds _____ degrees, recommended installation of a limiting bracket.

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