Pipe Joining Tools

Fire protection system piping relies on specialized pipe-joining tools designed to produce consistent, code-compliant mechanical connections in steel pipe. The two most common preparation methods—grooving and threading—each require distinct equipment that reflects the evolution of sprinkler installation practices.

Grooving machines are used to form a circumferential groove near the pipe end to accommodate grooved couplings. Roll-grooving machines, the most prevalent type, use a drive roll and a pressure roll to cold-form the groove into the pipe wall without removing material. These machines can be mounted on power drives, benchtop units, or portable field stands, depending on pipe size and jobsite conditions. Cut-grooving machines, less common today, remove material to create the groove and are typically used for heavier wall pipe or specialty applications. Proper grooving tools ensure groove diameter, width, and depth meet manufacturer tolerances so that the coupling housing can engage securely and achieve rated pressure performance.

Threading machines are used to cut tapered pipe threads—typically NPT—into pipe ends for use with threaded fittings. Modern power threading machines clamp and rotate the pipe while a die head cuts standardized threads. Cutting oil is applied during the process to reduce friction, improve finish quality, and extend die life. Manual ratchet threaders and hand dies are still used for small-diameter pipe and service work.
Together, grooving and threading tools enable installers to integrate grooved mains with threaded branch lines and trim, combining speed, precision, and long-standing trade practice within a single fire protection system.