Proper venting of polyethylene chemical storage tanks is vital for safe operation. It is also critical to maximizing a polyethylene storage tank's effective lifecycle. Poly chemical storage tanks are designed to function at atmospheric pressure per ASTM-D 1998, the industry standard for producing vertical polyethylene chemical tanks. During pneumatic offloading from a tanker truck, offloading pressures can exceed 30 psi, resulting in high ACFM rates. Under this scenario, standard venting designs are inadequate to release the pressure. To protect against an over pressurized chemical storage tank you should consider one of our innovative tank vent lid solutions.