Northwest Pipe Company is a North American manufacturer of large diameter, high-pressure steel pipeline systems for use in water infrastructure applications, primarily related to drinking water systems. The Company operates through two segments: Water Transmission and Tubular Products. The Company's Water Transmission segment primarily produces steel pipeline systems for use in drinking water infrastructure. The Tubular Products segment primarily produces steel line pipe products for energy applications. The Company manufactures other welded steel pipe products for use in a range of applications, including energy, construction, agriculture, and industrial uses. The Company's pipeline systems are also used for hydroelectric power systems, wastewater systems and other applications. The Company also makes products for industrial plant piping systems and certain structural applications.