Rubber O-ring Bell and Spigot Joint
|(a) Lined cylinder pipe (LCP) and (b) embedded cylinder pipe (ECP) profiles|
|Fig.C: Snap Ring restrained joint|
|Fig. D: Harness clamp|
This effectively locks the joint together. The harness clamp joint utilizes a two-part clamp which engages bars on the bell and spigot rings. After the spigot is pushed home into the bell, the installer places the clamp halves over the harness bars, securing them with bolts and nuts. The clamp installed in this manner locks the joint together.
|Fig. E: Testable joint|
Other types of special joints available for PCCP include subaqueous joints and bonded joints. Subaqueous joints, depicted in Fig. F, are designed to facilitate jointing underwater by divers. They normally incorporate external lug and drawbolt assemblies.
|Fig. F: Lined cylinder pipe & Embedded cylinder pipe|
|Fig. G: Bonded joint - Exothermic fusion welded copper cable method|