Receptacles – Container attachment or adjunct – Pressure relief means
Patent
1988-04-08
1991-03-19
Stinson, Frankie L.
Receptacles
Container attachment or adjunct
Pressure relief means
220 861, 73 49, B65D 9034
Patent
active
050003356
ABSTRACT:
An underground storage tank for fluids such as gasoline or chemicals is provided with L-shaped piping means for venting vapor pockets that would normally be trapped inside an inclined tank. The tank has a generally cylindrical top surface with one or two vent tubes secured inside the top of that surface, each tube extending from a point immediately adjacent a head wall to an upstand exiting through the manway cover. When a pair of such tubes and upstands is provided, vapor can be vented or discharged to the atmosphere, regardless of which way the tank is inclined. Such venting of trapped vapor prior to a hydrostatic test on an underground storage tank permits accurate determination of tank leakage and integrity. Existing tanks may be retrofitted with such venting means.
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Elman Gerry J.
Stinson Frankie L.
Tankha Ash
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