Patent ID: 8449800
Filing Date: 2013-05-28
Classification: B29C,B29K

Abstract:
1. The method for strengthening non-leaking connections between high pressure in situ piping, the steps of the method comprising: providing two separate sections of open ended, in situ piping carrying gas with a pressure in excess of 60 psi, said sections being interconnected by a pipe coupling between the open ends of the pipe sections; ensuring there is no leakage of gas and zero pressure coming from the pipe coupling or the pipe sections as the gas is being carried through the piping at a pressure in excess of 60 psi; grit blasting the coupling and portions of each pipe section which extend from and are adjacent to the coupling; applying a primer to the grit blasted coupling and adjacent portions of the pipe sections; providing a non-pressurized encapsulation mold having an internal space extending the length and width of the mold; installing the non-pressurized encapsulation mold over the coupling and pipe sections such that the mold completely encapsulates the coupling and covers the adjacent portions of each pipe section; securing the encapsulation mold over the encapsulated coupling and pipe sections; providing a curable, liquid polyurethane resin sealant having a tensile strength in excess of 3000 psi; pouring the resin sealant into the non-pressurized encapsulation mold, directly onto the outer surfaces of the adjacent portions of each pipe section; filling the entire space of the non-pressurized encapsulation mold between the inner surface of the non pressurized mold and the outer surfaces of the adjacent portions of the pipe sections, with, the resin sealant such that the resin sealant is the sole bonding and strengthening constituent contained within the space of the encapsulation mold; allowing the resin sealant to adhere directly to the outer surfaces of the adjacent portions of the pipe sections and cure and solidify within the internal space of the mold between the inner surface of the mold and the outer surfaces of the adjacent portions of the pipe sections, such that the resin sealant is the, sole bonding and strengthening constituent adhered to the outer surfaces; forming a rigid, resin sealant pipe containing core comprising only the resin sealant around the coupling and directly on the outer surfaces of the adjacent portions of the pipe sections; and retaining the encapsulation mold over the coupling and pipe sections; thereby providing a high tensile strength encapsulation over the connection between the pipe sections utilizing the resin sealant as the sole bonding and strengthening constituent within the encapsulation mold.