Joint for plastic lined concrete pipe

Abstract

Provided herein is a joint for plastic lined concrete pipe. The joint may include an end-to-end connection between a bell, or socket end of a first segment of plastic lined concrete pipe, and a spigot, or tip end of a second segment of plastic lined concrete pipe. The opposing end faces of the bell and spigot ends may be held together by a conventional clamping mechanism, as discussed in greater detail below. The end faces may each be covered by a thermoplastic material, such as high density polyethylene (“HDPE”). A circumferential seal, such as a packer, may be retained between the end faces. The circumferential packer, alone or in combination with a circumferential block seal positioned radially outwardly therefrom, may reduce or prevent fluid flowing through the pipe from escaping as the fluid flows through the joint.

Dependencies are inferred from the claim text.