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TM 9-2330-329-14&P
VAPOR INTEGRITY TEST--Continued
0152 00
21.
Remove coupling assembly (8) from vapor vent line (10).
22.
Install coupling assembly (8) on discharge port of valve B (34).
23.
Install a closed cap on the now open vapor vent line (10).
24.
Open emergency valve A (25). Evacuate tank and piping system according to steps 3 and 5, then
continue with step 25.
25.
Wait 5 minutes to verify that vacuum reading on gage (35) remains stable. If vacuum does not
drop, go to step 34. If vacuum drops more than 0.5 in. wc, go to step 26.
26.
Reevacuate tank and piping system according to steps 3 thru 5; then continue with step 27.
27.
Close emergency valve A (25). Wait 5 minutes to verify that vacuum reading on gage (35)
remains stable. If vacuum does not drop, tank is leaking; go to 28. If vacuum drops more than 0.5
in. wc, piping system is leaking. Go to step 31.
28.
Locate leak in tank, check cleanout caps (1), manhole cover (2), precheck circuit and
weld
seams.
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