UNSPSC 31311102: Carbon steel solvent welded pipe assemblies

UNSPSC 31311102 Carbon steel solvent welded pipe assemblies is a Commodity code that spans industrial and municipal infrastructure piping used in water treatment, wastewater, stormwater drainage, and utility distribution projects. State and local governments procure these assemblies as components within larger capital improvement programs for water systems, bridge outfalls, and pipeline infrastructure, typically as part of construction contracts or as standalone supply agreements. The mix of issuing bodies includes state departments, county governments, and municipalities; water authorities and utility districts appear frequently as end-users. Representative recent opportunities include the City of Phoenix Public Works Department IFB 26-SW-0379 (posted July 8, 2026, due August 12, 2026) for industrial pipe, miscellaneous fittings, and equipment on an as-needed basis under a three-year term with two optional one-year extensions, and Broward County's RFP OPN2131884B2 (posted June 17, 2026, due July 1, 2026) for welding and fabrication services covering portable and shop welding, metal fabrication, and repairs on steel and stainless steel components at water treatment plants and pump stations.

Recent activity concentrates in Florida and Georgia, with secondary activity in California and Arizona. Orange County Florida has issued multiple sewer and water infrastructure solicitations (Y26-126 for sewer pipes and fittings with an estimated five-year spending total of approximately $28.7 million, due January 22, 2026); the City of Palm Bay, Florida is conducting outfall pipe replacement (ITB 41ITB26, due July 14, 2026). Georgia solicitations include Notla Water Authority (PE33821NONST2026000000002, approximately 2,400 linear feet of 6-inch water line, due June 18, 2026), the City of Lavonia Water Treatment Plant improvements (PE66940NONST2026000000005, due May 26, 2026), and Gwinnett County's stormwater pipe procurement (BL079-26, due May 19, 2026). Pipe assemblies appear in solicitations as supply items within broader infrastructure projects, typically quoted on F.O.B. destination basis with firm and fixed pricing, 24- to 48-hour delivery expectations, and local inventory maintenance requirements. Issuing bodies emphasize compliance with state standards (Georgia Department of Transportation, Orange County Utilities Division), American Iron and Steel provisions on federally assisted projects, and Section 3 resident preference where applicable.