Industries & Markets

Northwest Pipe Company focuses on one market: the water infrastructure market. Our goal is to manufacture pipe and infrastructure components that support the water conveyance in the water and wastewater market.

Steel Pipe on the PRCEP
126-inch Polyurethane Lined & Coated AWWA C200 Steel Water Pipe, Provo Reservoir Canal Enclosure Project, Utah

For large-scale transport of water and wastewater, we are the largest providers of spiral-welded steel water pipe, rolled-and-welded straight seam pipe, and custom fabricated pipe in North America. These options come with numerous types of linings and coatings, joint connection alternatives to suit the application, and professional support that extends from engineering through construction and installation.

Our full line of quality-tested precast and reinforced concrete products are designed to meet the critical demand of water infrastructure. We provide a diverse product line at the highest quality including reinforced concrete pipe, box culverts, manholes, vaults, catch basins and inlets, sanitary sewer products, bridge structures, septic tanks and grease traps, and electrical vaults.

We contribute to the continued growth of the trenchless technology market by manufacturing steel piping products for both jacking as well as pull-in applications. Permalok® steel casing pipe provides a proprietary joint that eliminates the need to perform field butt-welding of traditional casing pipe, increasing construction productivity that results in substantial savings to the Contractor and the Owner.

Northwest Pipe Company not only manufactures water transmission pipe for new construction, we are also pioneers in the rehabilitation of large-diameter prestressed concrete cylinder pipe with the pre-rehabilitation systems development of our steel Reliner and Slipliner Systems for potable water. As our Nation’s water infrastructure continues to age, the need for our fully-structural reliners continue to grow as well.