A new pipe alignment clamp that attaches rapidly to perfectly align water wall boiler tubes and single pipes to speed and secure the welding process is being introduced by Esco Tool of Holliston, Massachusetts.


The Esco HOG TIE ® Boiler Tube Weld Alignment Clamp is a precise two-piece device that rapidly and accurately aligns boiler tube ends to reduce the risk of failure from misalignment when welding water wall boiler tubes.

Simple to use, one side has two through-holes and the other has threaded inserts which accept two bolts that draw them together; exposing the tube ends for tack welding before removal to finish the entire tube joint weld.

Assuring fast and accurate alignment, the Esco HOG TIE ® Boiler Tube Weld Alignment Clamp is offered in seven sizes for tube from 1.75” to 3.25” O.D.

Made of precision machined high strength steel, it can be supplied alone or as a kit with an impact wrench and socket, four 0.5” bolts, two spare through-hole inserts, two spare threaded inserts, and a metal carrying case.

The Esco HOG TIE ® Boiler Tube Weld Alignment Clamp Kit sells for $795.00 and can be rented from $77.00 per week; with 24-hour shipment available.

About ESCO Tool Company
The ESCO Tool Company was founded in 1954 and developed the first portable end prep tool for the Trident Nuclear Submarine program. Those early tools clamped to the tube O.D. and machined precision end preps on nozzles that were attached to a vessel. Back then, there was no other way to do the job. After this early success, other uses where found for these innovative tools and they became the best way to end prep high temperature and pressure boiler tubes. It became apparent, however, that O.D. clamping limited the usefulness of those early generation tools for boiler work.

Always solutions-oriented, ESCO developed the first narrow body I.D. clamping tool in the 1970s to satisfy the needs of the boiler industry. The tool was well received in the boiler fabrication, maintenance, and metalworking industries and ESCO has been innovating consistently since that time. Working closely with end-users on the toughest tube and pipe cutting and welding end prep challenges has allowed us to invent and manufacture high quality tools that work efficiently, get the job done fast, and require no special operator training. ESCO Tool has a long heritage of innovation.

Today, our MILLHOG® Tools are boilermaker tough and field proven! We design and build robust gear drives and housings, select the best components available in the world, incorporate self-centering draw rod assemblies that rigidly mount to the tube or pipe I.D., and feature the EscoLockTM wedge-style blade lock system with TiN (titanium nitride) coated cutter blades that direct heat away from the tube or pipe surface. Providing torque-free operation, these tools pull a continuous thick chip without cutting fluids.

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