Glass fiber reinforced resin tank with particular joint structure

Claim 1

In a glass fiber reinforced resin tank adapted to contain corrosive liquids and being of the type wherein two tank halves, each having an inner liner comprising corrosion resistant resin and an outer structural wall portion comprising corrodible resin exposed at an open end of the tank half, are secured relatively to each other, with open ends adjacent each other in closely spaced, non-abutting relationship, by means including an external lay-up of reinforced resin, an improvement over the former construction wherein at least one of the tank halves was provided with a manway to permit application of an internal lay-up of reinforced corrosion resistant resin in bridging relationship to the open ends of the tank halves, said improvement comprising a flexible gasket installed from outside the tank before application of the external lay-up and sealed to the liners of said tank halves around their inner peripheries respectively adjacent their open ends, the gasket comprising corrosion resistant resin and shielding the exposed structural wall portions respectively at the open ends of the tank halves from corrosive liquid when corrosive liquid is stored in the tank.