Quantcast PRESSURE TEST PROCEDURE (cont) - TM-9-2330-330-14-P0761

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TM 9-2330-330-14&P
VAPOR INTEGRITY TEST--Continued
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21.
On regulator assembly (12), monitor gage (30) for 5 minutes to verify that pressure reading
remains stable at 17.5 to 18.5 in. wc. If pressure does not drop more than 0.5 in. wc, go to
step 22.
22.
Repressurize tank and piping system according to steps 3 thru 5. Close emergency valve A (25).
Monitor gage (30) for 5 minutes. If pressure does not drop and tank is leaking, go to step 23. If
pressure drops more than 0.5 in. wc piping system is leaking. Go to step 26.
23.
Locate tank leak, check cleanout caps (1), manhole cover (2) and precheck circuit, and
weld seams.
24.
Return tank and piping system to atmospheric pressure by opening manifold drain valve (29) and
emergency valve A (25).
25.
Repair tank leak as required. Restart test from step 1.
26.
Locate leak in piping system, check G valve (28), D valve (26), precheck circuit, and pipe joints.
27.
Return tank and piping system to atmospheric pressure by opening manifold drain valve (29) and
emergency valve A (25).
28.
Repair piping system leak as required. Restart test from step 1.
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