Northwest Pipe Company is the largest manufacturer of engineered steel pipe water systems in North America. Founded in 1966, 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 strategically positioned manufacturing facilities in the United States and Mexico. 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.