Method of fabricating a tank and method of fabricating a tank connector therefor

摘要

The method of fabricating a tank connector assembly comprising the steps of first providing a metal spud member having an internally threaded portion and a cylindrical wall portion. Producing a sub-assembly comprised of an insert member having an internal groove therein and made from a polymer material and an expandable band member positioned in the groove. The next step is to assembly the sub-assembly of the insert member and expandable band member with the spud member. The sub-assembly is positioned inside the cylindrical wall portion of the spud member. The next step is to apply an expansion force to the expandable band causing the band to deform slightly and thereby force the insert member into tight sealing contact with the depending wall portion of the spud member. The metal spud member is welded in an opening in the wall of a steel tank. A polymer material is introduced into the interior of the steel tank and the tank is then subjected to a rotational casting movement in the presence of heat to cause the polymer material in the tank to be uniformly distributed over the internal surface of the tank. The heat applied during the rotational casting step serves to cause the inner tank to become bonded to the insert member.