Northwest Pipe Company is a leading manufacturer of welded steel pipe and tube products. Founded in 1966, and with more than 700 employees, we take great pride in providing the highest quality products to the most exacting and challenging specifications for a multitude of applications. Headquartered in Vancouver, WA the company has nine manufacturing facilities in the United States and Mexico, and is divided into two main business segments — Water Transmission and Tubular Products.
Water Transmission Group – The Water Transmission Group is the largest manufacturer of engineered steel pipe water conveyance systems in North America. We utilize both the spiral weld and rolled and welded methods of manufacturing for our large diameter double-submerged arc welded pipe. Our spiral weld pipe is manufactured in sizes of 12-inch through 156-inch OD and wall thickness of 0.105-inch through 1.00-inch.
Our rolled and welded pipe can be rolled to a variety of diameters with wall thicknesses up to 3.5-inch. Steel casing pipes of up to 2-inch thickness and diameters of 30-inch through 150-inch for crossings and tunnels are manufactured with the proprietary Permalok® joint. Steel Reliners are also manufactured for the structural rehabilitation of large diameter concrete pressure pipelines.
Trained Professionals – We employ a staff of manufacturing and fabrication professionals, and Professional Engineers to provide the highest quality products for a wide range of applications. Our services range from engineering consultation, specification review, estimating and on-site installation support. The systems we produce are custom manufactured and can accommodate an almost infinite number of configuration requirements.
Tubular Products Group – The Tubular Products Group operates a state of the art Electric Resistance Weld mill facility. The Tubular Products portfolio serves a wide range of markets and its quality certified pipe and tube products are good for applications including: oil and gas, structural, industrial, fire protection, low pressure and agricultural.
In 2008, Northwest Pipe Company partnered with to collaborate on R&D of a lift-based turbine design that became the foundation for Lucid Pipe™. The technology is a water-to-wire energy recovery solution that enables water-intensive industrial, municipal and agricultural facilities to produce clean, reliable, low-cost electricity from their gravity-fed water pipelines and effluent streams.
Water Transmission, Our Bread & Butter – The Water Transmission Group is the largest manufacturer of engineered steel pipe water conveyance systems in North America. With eight Water Transmission manufacturing facilities, the Group is positioned to meet North America’s growing needs for water and wastewater infrastructure.
The Water Transmission Group serves a wide range of markets and their solution-based products are a good fit for applications including: water transmission, plant piping, low pressure and gravity flow, energy, tunnels, river, railroad and highway crossings, large diameter pressure pipe rehabilitation, structural, and industrial. Casing Pipe – Enhancing our product offerings is the proprietary Permalok® steel casing pipes. We offer a wide range of custom fabrications ranging from elbows, flanges and tees to ring girders and bifurcations.
Permalok® – Enhancing our product offerings is the proprietary Permalok® steel casing pipe, a proprietary interlocking push joint system that eliminates the need to field butt-weld traditional plain-ended steel casing pipe.
The acquisition of Permalok® in January 2014 now enables us to provide high quality casing pipe on water and sewer pipeline projects whenever design and specifications require added structural protection of a carrier pipe while crossing roads, railways and other man-made and natural obstacles.
Variety of Sizes and Wall Thicknesses – We provide several different types of connection systems as well as a host of linings and coatings for corrosion protection. Diameters range from 30-inch to 150-inch, and wall thickness of up to 2 1/2-inch.
With plants located in St. Louis, MO and Salt Lake City, UT, Permalok® can be supplied to your projects anywhere in North America.
Tubular Products – The Tubular Products Group operates a state of the art ERW mill facility. Our portfolio serves a wide-range of markets as well and its quality certified pipe and tube products are good for applications including: oil and gas, structural industrial, fire protection, low pressure and agricultural.
Strategically Located Plant – Our Tubular Products pipe is manufactured in Atchison, KS in sizes ranging from 4.5” to 16” OD, wall thicknesses up to .375”, through API grade X70.
This strategically located facility is rail served and well positioned for the energy markets in the upper mid-West and Central United States. In addition to manufacturing API line pipe, we also produce sprinkler, industrial and structural pipe.
Beginning in 1999, Northwest Pipe has used its 100+ years of experience working with steel products to manufacture and provide ASME pressure vessels, tanks, pipe fittings and custom fabrications to customers around the world. As a registered maquiladora operation all of our products are exported to the U.S. and find their way from our U.S. customers to the end user. Many of the finished goods are then exported to destinations around the world.