Northwest Pipe Company, together with its subsidiaries, manufactures and supplies engineered welded steel pipe systems in North America. The company offers large-diameter and high-pressure steel pipes, reinforced concrete pipes, and protective linings primarily used in water infrastructure, including drinking water systems, hydroelectric power systems, wastewater systems, industrial plant piping systems, various structural applications, and other applications. It sells its products primarily to installation contractors. Northwest Pipe Company was founded in 1966 and is headquartered in Vancouver, Washington.