UNSPSC 31351400: Bonded tube assemblies

UNSPSC 31351400 Bonded tube assemblies is a Class code that in recent state and local procurement activity covers custom steel fabrication services—including welded assemblies, protective enclosures, hand railings, cages, and anti-vandalism covers—rather than the narrower scope the code name suggests. The City of Tucson's RFP No. 240080 for its Facilities and Communications Maintenance department exemplifies the breadth: the solicitation calls for metal fabrication, mobile welding, emergency welding, and machining across steel, galvanized steel, stainless steel, aluminum, and coated materials. Issuing bodies appear to be primarily municipal departments managing facilities maintenance and asset protection, with work performed at vendor fabrication shops and on-site as needed. The contract structure—an initial one-year term with four one-year renewal options—is typical for citywide standing-order agreements.

The source shows activity in Arizona; the Tucson RFP posted March 26, 2026, with proposals due November 30, 2023 (an apparent data entry discrepancy in the source), and included a pre-submittal virtual meeting on November 16, 2023. Evaluation will weigh method of approach, qualifications, experience, and pricing, with typical project completion timelines of six weeks. The Tucson opportunity carries Section 3 Program compliance requirements—25% of total labor hours by Section 3 Workers, 5% by Targeted Section 3 Workers—and DBE participation, Buy America, and civil rights compliance tied to HUD and federal transit funding. Contractors failing to meet these requirements face potential contract sanctions, termination, or debarment from federally assisted contracts. The source supports only one recent opportunity under this code.