Taper pipe joint

Abstract From the Canadian patent

The process of the invention can be practiced with coated and uncoated pipe, although the process hag particular utility for coated pipe. The pipe joint made with the process of this invention involves coupling a pin section to a bell section. When formed the joint has a cylindrical, mechanical interference section that is followed by a substantial conical, non-interference section whose opposite walls are chemically sealed to each other. The conical section of the pin is first coated with a flexible adhesive. Then by telescoping the pin inside the bell, the flexible adhesive becomes extruded from the cavity between the bell and the pin to thereby automatically, form a ring which completely …