OPERATING PROCEDURES FOR USE WITH ALL STOPPPERS
INSTALLATION PROCEDURE FOR All TYPES OF INFLATABLE BAGS
Do not allow sparks, hot metal or welding slag to come into contact with stopper or bag, as they will burst.
Do not expose stopper or bag to temperatures in excess of 150° F.
Do not exceed maximum bag or line pressures as this will cause stopper or bag to burst.
Remove ALL burrs from inside of tap hole as they will tear stopper or bag.
Vent pipes must extend 8 ft. above top of excavation, higher if necessary, to remove any vapor bypassing bag or stopper. Install vent pipes so all blow-off is directed AWAY from ALL sources of ignition.
Pack duct seal liberally around each tap hole after stopper or bag is inserted and fully expanded to prevent vapors from discharging into work area.
Since conditions vary greatly at each job site, the above illustration may have to be varied. The ultimate user must determine the suitability of any variations made and their effects on the safe use of the product. AMERICAN WELDING SOCIETY and AMERICAN GAS ASSOCIATION safety practices must be followed at all times.