Sample Hatch (Internal Floating Roof)

UFC 3-460-03

21 JANUARY 2003

2. Check tape cable for wear or fraying caused by

rubbing on the cover.

Sample Hatch (Internal Floating Roof)

1. Check overall condition.

2. If equipped with a fabric seal, check for automatic

sealing after sampling.

3. If equipped with a recoil reel opening device, check for

proper operation.

Roof-Mounted Vents (Internal Floating Roof)

Check condition of screens, locking pins, and pivot pins.

Gauging Platform Drip Ring

On fixed-roof tanks with drip rings under the gauging

platform or sampling area, inspect drain return to the tank

for plugs.

Emergency Roof Drains

Inspect vapor plugs for emergency drain; ensure that seal

fabric discs are slightly smaller than the interior diameter

of the pipe, and that fabric seal is above the liquid level.

Removable Roof Leg Racks

Check for racks on roof.

Vacuum Breakers

Record size, number, and type of vacuum breakers.

Inspect vacuum breakers; if high legs are set, check for

setting of mechanical breaker in high-leg position.

Rim Vents

1. Check condition of the screen on the rim vent cover.

2. Check for plating off or removal of rim vents where

jurisdictional rules do not permit removal.

Pontoon Inspection Hatches

1. Open pontoon inspection hatch covers and check

inside for pontoon leakage.

2. Test for explosive gas (an indicator of vapor space

leaks).

Checklist derived from API Standard 653, Tank Inspection, Repair, Alteration, and Reconstruction

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