Northwest Pipe Company Introduces the Radial Bending Joint for Steel Pipe Microtunneling

Rhea-AI Summary

Northwest Pipe Company (Nasdaq: NWPX) has launched the Permalok® Radial Bending Joint (RBJ), a pioneering technology for trenchless microtunneling that allows steel pipes to be installed at a curved radius of 800 feet. This patent-pending innovation reduces installation time and costs by eliminating traditional butt-weld joints. The RBJ is available in diameters from 30 to 156 inches and was validated through Finite Element Analysis at the University of Thessaly. This development positions Northwest Pipe to enhance efficiency in challenging installation environments.

Positive

• Introduction of innovative Permalok® Radial Bending Joint enhances microtunneling capabilities.
• Reduces installation time and field costs by eliminating butt-weld joints.
• Technical validation through Finite Element Analysis demonstrates product reliability.

Negative

• None.

New joint is first of its kind to allow for curved steel trenchless installation.

VANCOUVER, Wash., Nov. 15, 2022 /PRNewswire/ -- Northwest Pipe Company (Nasdaq: NWPX), a leading manufacturer of water-related infrastructure including engineered pipeline systems and precast products, has developed the Permalok^® Radial Bending Joint (RBJ) that enables steel pipe to be installed in a curved radius in  microtunneling applications.

This patent-pending technology is a ground-breaking advancement in trenchless microtunneling construction. The Northwest Pipe Company team developed the proprietary joint design to meet a target radius curve of 800 feet during trenchless installation.

Permalok^® steel pipe is most often used as a casing pipe for utilities and excels in trenchless jacking applications including microtunneling, pipe jacking, auger boring, and pipe ramming. The press-fit machined joints reduce field time by eliminating butt-weld joints and result in a shortened install duration and reduced field costs. To solidify the joint's validity, the Permalok^® RBJ has undergone Finite Element Analysis at the University of Thessaly Department of Mechanical Engineering.

"This joint changes the way we have all thought of microtunneling construction," states Scott Montross, President and Chief Executive Officer of Northwest Pipe Company. "We have developed a solution that enables steel pipe to curve during trenchless construction, which makes microtunneling even more feasible in constrictive or challenging environments. For years, trenchless applications have been limited by a straight installation path—but not anymore."

The Company manufactures Permalok^® RBJ in pipe diameters varying from 30 to 156 inches. The actual curve radius is dependent on site conditions as well as the pipe diameter and length.

About Northwest Pipe Company – Founded in 1966, Northwest Pipe Company is a leading manufacturer for water-related infrastructure products. In addition to being the largest manufacturer of engineered steel water pipeline systems in North America, the Company manufactures high-quality precast and reinforced concrete products; water, wastewater, and stormwater equipment; steel casing pipe; bar-wrapped concrete cylinder pipe; and one of the largest offerings of pipeline system joints, fittings, and specialized components. Strategically positioned to meet growing water and wastewater infrastructure needs, Northwest Pipe Company provides solution-based products for a wide range of markets under the ParkUSA, Geneva Pipe and Precast, and Permalok® lines. The Company's diverse team is committed to quality and innovation while demonstrating the Company's core values of accountability, commitment, and teamwork. The Company is headquartered in Vancouver, Washington, and has 13 manufacturing facilities across North America. Please visit www.nwpipe.com for more information.

Contact:  
Aaron Wilkins  
Chief Financial Officer  
Northwest Pipe Company
360-397-6294 • awilkins@nwpipe.com

 

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SOURCE Northwest Pipe Company

FAQ

What is the Permalok® Radial Bending Joint by Northwest Pipe Company?

The Permalok® Radial Bending Joint (RBJ) is a new technology that allows for the installation of steel pipes at curved radii during microtunneling.

How does the new joint technology impact microtunneling?

This technology significantly improves installation flexibility and efficiency, especially in constrictive environments.

What are the diameter options for the Permalok® RBJ?

The Permalok® RBJ is manufactured in diameters ranging from 30 to 156 inches.

When was the Permalok® RBJ introduced?

The Permalok® Radial Bending Joint was introduced on November 15, 2022.

Who validated the Permalok® RBJ technology?

The technology was validated through Finite Element Analysis at the University of Thessaly.