UNSPSC 31311505: Low alloy steel welded or brazed pipe assemblies

UNSPSC 31311505 Low alloy steel welded or brazed pipe assemblies is a Commodity code that encompasses welded steel pipe products, pipe assemblies, and fabricated steel components for water, wastewater, stormwater, and gas infrastructure applications. State and local governments procure finished welded steel pipe in standard diameters and custom fabricated steel assemblies for municipal utility systems, water treatment plant modifications, bridge replacement projects, and industrial infrastructure maintenance. Work solicited under this code ranges from supply contracts for stock pipe inventory to specialized welding and fabrication services for component repair and replacement at municipal facilities.

Issuing bodies include state departments, county utilities and water authorities, city public works departments, and independent water systems across multiple jurisdictions. Recent solicitations originate from Broward County (welding and fabrication for water and wastewater facilities), the City of Phoenix Public Works (industrial pipe and fittings supply), Orange County Florida (sewer pipe and fittings for a five-year term estimated at $28.7 million spending), the City of Lawrenceville Georgia (gas pipe materials for DOT project delivery), Gwinnett County Georgia (stormwater pipe on an annual contract with four four-year renewal options), and smaller municipalities including the City of Tucson (job order contracts for water production facility modifications). Geographic activity concentrates in Florida, Georgia, and Arizona, with secondary activity in California and Wisconsin. Representative recent opportunities include Broward County's RFP for welding and fabrication services (OPN2131884B2, due July 1, 2026) requiring AWS Welder Certification and miscellaneous metals credentials to perform portable and shop welding on steel, stainless steel, and aluminum components at water treatment plants and lift stations; the City of Phoenix IFB for industrial pipe, miscellaneous fittings, and equipment (IFB26SW0379, due August 12, 2026) covering HDPE and PVC pipe supply on an as-needed basis with 24- to 48-hour delivery; and Orange County Florida's IFB for sewer pipes and fittings (Y26-126, due January 22, 2026) encompassing PVC, ductile iron pipes, valves, and manhole components with an estimated five-year spending total of $28.7 million.