Northwest Pipe Company manufactures engineered steel pipe water systems in North America. It produces large-diameter, high-pressure, and engineered welded steel pipeline systems for use in drinking water infrastructure; and pipes for piling and hydroelectric projects, wastewater treatment plants, and other applications, as well as for industrial plant piping systems and structural applications. The company sells its products primarily to public water agencies directly or through installation contractors. Northwest Pipe Company was founded in 1966 and is headquartered in Vancouver, Washington.