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 TM 9-2330-330-14&P
VAPOR INTEGRITY TEST--Continued
0168 00
10.
Close emergency valve A (25) and monitor gage (35) on regulator assembly (12).
11.
Wait 5 minutes. If pressure does not drop more than 0.5 in. wc on gage (35), go to step 13. If
pressure drops more than 0.5 in. wc, go to step 12.
12.
Locate the leak in vapor vent line (10), check vapor vent hood (7), vapor vent hose (32), and pipe
joints (33).
13.
Return tank and piping system to atmospheric pressure.
14.
Repair any leaks found in vapor vent valve (5). Restart test at step 1.
15
Return vapor vent line to atmospheric pressure by opening draincock valve (20) of regulatory
assembly (12).
16.
On regulatory assembly (12), close draincock valve (20) and monitor gage (35) for 5 minutes.
17.
If pressure on gage (35) does not increase, vapor vent is functional; go to step 20. If vacuum
increases more than 0.5 in. wc, vapor vent valve is leaking. Go to step 18.
18.
Return tank and piping system to atmospheric pressure by opening G valve (28) and emergency
valve A (25).
19.
Repair any leaks found in vapor vent valve (5) as required. Restart test from step 1.
20.
Return tank and piping system to atmospheric pressure by opening G valve (28) and emergency
valve A (25).
0168 00-17
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