The Permalok system is approved for both steel casing and pressure pipe applications, with a unique profile associated with each type of field use. Standard specifications ensure that all pipe manufactured by Permalok meet stringent guidelines.

The original T5 profile, patented in 1993 for steel casing pipe, has been used in thousands of trenchless excavation projects nationwide.
Casing Pipe Specifications

The T7 profile, approved for pressure applications up to 300 psi in 2002, brings the same degree of reliable and efficient performance to the hydropipe industry.
Carrier Pipe Specifications

The Type HDD connection allows the Horizontal Directional Drilling industry freedom from field welding, making the connection faster and easier. The Type HDD connection is available as both casing pipe and carrier pipe.

The Permalok connection is attractive to the trenchless excavation industry because it is designed to be flush with the interior and exterior surfaces of the pipe. Joint quality is further enhanced because the Permalok connector is consistently round, true and perpendicular to the pipe axis. Its unique machined groove makes stabbing and aligning easy and quick. What’s more, the Permalok design, combined with the use of a sealant such as RTV Silicone, will not leak even under considerable pressure.