HP LOK Restrained Joint Pipe and Fittings

HP LOK^® restrained joint pipe and fittings provide flexible push-on joints for 42”–64” pipe sizes. The HP LOK restrained joint has a working pressure equivalent to the working pressure rating of the parent pipe with a maximum working pressure rating of 350 psi. An HP LOK Ring that is factory installed in the bell provides a positive axial lock between the bell interior surface and a retainer weldment on the spigot end of the pipe. HP LOK is available with a variety of coatings and linings. Metallic Zinc coating is also available.

For smaller diameter restrained joint pipe, please see our HDSS pipe.