Glass fiber reinforced resin tank with particular joint structure

Claim 1

An elongated generally cylindrical fiber-reinforced resin tank particularly adapted to contain corrosive liquids and comprising two tank halves each having a closed end and a flangeless open end and each having an inner liner of corrosion-resistant resin and an outer structural wall of corrodible resin, the corrodible structural wall of each tank half ending short of the flangeless open end thereof in a direction axially of the tank and the corrosion-resistant inner liner of each tank half extending axially of the tank past an end of the structural wall of the tank half adjacent the flangeless open end thereof and being radially enlarged adjacent said flangeless open end thereby to cover said end of the structural wall and present a radially outer surface substantially flush with the outer surface of the structural wall, and an external lay-up bridging the flangeless open ends of the tank halves on the outside of the tank and securing the two tank halves relative to each other with the flangeless open ends thereof adjacent each other, said external lay-up being subject to contact by corrosive liquid or vapors thereof when corrosive liquid is stored in the tank and at least a radially inner portion of the external lay-up comprising corrosion-resistant resin.