(3) Water hose, at least 2" ID and 50' long to facilitate rapid
filling and draining.
(4) Two gages, 30 PSI capacity (gage should be checked
(5) Gage hose with ¼" ID x 50' long to connect both gages with
petcock at tank flow tube.
For tank containers 7' 4" flat width, the test pressure is:
(1) Initial pressure -
4 PSI and torque bolts to 70 ft. lbs.
(2) Test, Stand
7 PSI for 2 hours
(3) Maximum pressure -
(4) Rise to maximum - 10 min. from 7 to 12 PSI
Place tank in test area, making certain that all the air has been-
expelled by flattening the tank completely with the air relief
Close air relief valve before beginning test:
Bleed air off filling line to prevent air from entering tank.
Attach supply hose securely.
Then attached ¼" hose to petcock on
Close petcock, turn on water.
After tank is partially full, approximately two feet high, open
petcock on flow tube and bleed air off ¼" hose and attach both
Open petcock and fill.
When the water pressure in the tank reaches 4 PSI, shut off water
Retorque all screws to recommended torque. Proceed
watching gages carefully.
At 7 PSI immediately shut off water
supply and allow tank to stand for 2 hours.
This is to allow the
tank to stretch and adjust to higher pressure.
After the two-hour period open supply valve and proceed, throttling
down supply valve so that there will be approximately a 10 minute
rise from 7 PSI to 12 PSI.
When test goes beyond 7 PSI, all personnel should be kept at a
minimum of 50 feet away from tank.
A failure at high pressure
could cause injury.
Immediately upon reading 12 PSI, close the supply valve and open
the drain valve.
Do not let the tank stand at 12 PSI for any
length of time as this may overstress the internal cord structure.
Drain tank completely.
Remove hose; then, if necessary, dry.
After the hydrostatic test is completed, retorque all screws and
return tank to service.