UNSPSC 31311100: Solvent welded pipe assemblies

UNSPSC 31311100 Solvent welded pipe assemblies is a Class code covering the supply and assembly of piping systems joined through solvent welding processes. The recent state and local procurement activity under this code shows limited direct alignment with the nominal scope; the most recent solicitation tagged to it involves general steel fabrication services rather than specialized pipe-assembly work. City and county public works and facilities departments are the primary issuing bodies when opportunities do appear under this classification.

The City of Tucson posted RFP 240080 in March 2026 for steel fabrication services through its Facilities and Communications Maintenance department, with a pre-bid virtual meeting scheduled for November 16, 2023, and a proposal due date of November 30, 2023. The solicitation seeks custom doors, steel cages, anti-vandalism boxes and covers, hand railings, and protective infrastructure to address city vandalism and safety concerns, with work primarily performed at the contractor's fabrication shop. The contract carries a one-year initial term with options for four additional one-year renewals and a typical six-week project completion timeline. The procurement includes Section 3 labor requirements (25% of total labor hours by Section 3 Workers, with 5% by Targeted Section 3 Workers) and compliance with DBE participation, Buy America provisions, and civil rights standards tied to federal housing and transit funding. The solicitation emphasizes capabilities in metal fabrication, machining, metal finishing, mobile welding, and emergency welding across steel, galvanized steel, stainless steel, aluminum, and coated materials.