UNSPSC 31311502: Carbon steel welded or brazed pipe assemblies

UNSPSC 31311502 Carbon steel welded or brazed pipe assemblies is a Commodity code. State and local governments procure industrial piping infrastructure under this code—including HDPE and PVC pipes, couplings, elbows, fittings, and related materials for municipal water systems, stormwater management, drainage, aviation facilities, and wastewater operations. The City of Phoenix Public Works Department and Broward County Water and Wastewater Services appear as repeat buyers. Scope spans supply contracts for on-demand inventory stocking (Phoenix's three-year, two-option industrial-pipe and fitting agreements serving airports and public works), construction materials procurement for specific infrastructure projects (water line installations, outfall pipe replacement, stormwater rehabilitation corridors), and welding and fabrication services incorporating steel, stainless steel, and aluminum piping components. Representative recent solicitations include the City of Phoenix IFB 27-SW-0447 for industrial pipe and fittings (response due September 30, 2026), serving Phoenix Aviation Department with 24–48-hour delivery and local inventory maintenance; the City of Augusta ITB 27-116 for HDPE pipe, couplings, and end sections for drainage (response due September 29, 2026); and the City of Lawrenceville RFB SB002-27 for natural gas pipe materials and just-in-time delivery coordination along a DOT corridor (response due July 23, 2026).

Buying activity concentrates in Florida, Georgia, Arizona, and California. Recent opportunities span municipal public works departments, water and wastewater authorities, aviation districts, solid waste management agencies, and state transportation and environmental departments. Issuing bodies apply federal DBE participation goals, local small-business preferences, prevailing-wage requirements, American Iron and Steel provisions where federally funded, and E-Verify employment verification. Contracts typically run multi-year terms (two to three years with optional extensions) on firm-fixed or unit-price structures with cost-of-living or price-index adjustment provisions permitted at renewal. Delivery windows vary from immediate (24–48 hours for standby supply contracts) to extended construction schedules (90–270 calendar days for site-specific installations). Performance bonds, bid bonds, general liability insurance ($1–2 million per occurrence), and workers' compensation are standard requirements.