UNSPSC 31311509: Stainless steel welded or brazed pipe assemblies

UNSPSC 31311509 Stainless steel welded or brazed pipe assemblies is a Commodity code under which state and local governments procure piping components, fittings, and fabricated metal assemblies for water treatment, wastewater infrastructure, stormwater systems, and emergency construction projects. The code encompasses both off-the-shelf pipe products and custom welding and fabrication services tailored to municipal utility and infrastructure applications. Recent solicitations show state and local buyers sourcing stainless steel components alongside carbon steel, polyvinyl chloride (PVC), high-density polyethylene (HDPE), reinforced concrete pipe (RCP), and corrugated metal pipe for system expansions, replacements, and maintenance across water distribution, wastewater collection, and stormwater drainage networks.

Activity under the code spans state procurement offices, county water authorities, city utilities and public works departments, and special-purpose water districts across Florida, Georgia, California, and Arizona. Representative recent opportunities include Broward County's welding and fabrication services contract (RFP OPN2131884B2, due July 1, 2026) covering portable and shop welding on stainless steel, aluminum, and black steel components at water treatment plants, pump stations, and wastewater facilities with AWS Welder Certification and Miscellaneous Metals Certification required; the City of Phoenix Public Works Department's sealed-offer solicitation for industrial pipe, fittings, and equipment (IFB 26-SW-0379, due August 12, 2026 at 11:00 a.m.) on a three-year term with two optional one-year extensions requiring 24- to 48-hour delivery and dedicated contract support; and Gwinnett County Board of Commissioners' annual stormwater pipe purchase contract (BL079-26, due May 19, 2026) encompassing reinforced circular concrete pipe, HDPE, and corrugated metal pipe in multiple diameter ranges with fourteen-day delivery and a four-year initial term plus four optional twelve-month renewals. Orange County, Florida has also solicited sewer pipes and fittings on a five-year contract with estimated spending of $28.7 million and a Service Disabled Veteran Business preference applied (IFB Y26-126, deadline January 22, 2026). Geographic activity concentrates in Florida, Georgia, and California, with secondary opportunities in Arizona and Wisconsin.