UNSPSC 31311500: Welded or brazed pipe assemblies

UNSPSC 31311500 Welded or brazed pipe assemblies is a Class code under which state and local governments procure custom metal fabrication and welding services, including pipe assemblies, structural components, protective infrastructure, and specialized steel work. Recent solicitations show that the code encompasses broader steel fabrication scope than the nominal pipe-assembly title suggests — jurisdictions are buying custom doors, steel cages, anti-vandalism boxes, hand railings, and emergency welding across steel, stainless steel, galvanized steel, aluminum, and coated materials. City facilities and maintenance departments are the primary issuing bodies under this code, seeking vendors capable of metal fabrication, machining, metal finishing, mobile welding, and on-site emergency welding to protect municipal assets and address safety hazards. Work is typically performed at the vendor's fabrication shop with mobilization to city sites as needed.

The City of Tucson, Arizona represents the most recent activity under this code. In March 2026, the City of Tucson Facilities and Communications Maintenance department posted RFP No. 240080 for Steel Fabrication Services with a proposal due date of November 30, 2023, seeking a contractor for an initial one-year term with options to extend up to four additional one-year periods. The solicitation carries Section 3 Program requirements mandating that 25% of total labor hours be performed by Section 3 Workers, with 5% by Targeted Section 3 Workers, and compliance with Buy America, DBE participation, and civil rights standards. A pre-submittal virtual meeting was scheduled for November 16, 2023, with evaluation criteria focusing on method of approach, vendor qualifications and experience, and pricing, and typical project completion timelines of six weeks from approval.