UNSPSC 31163231: Pipe retaining collar

A round plate that has the shape of flange joined with the bolt to tighten the rubber ring to maintain the air-tightness of pipe joint in the cast iron pipe and polyethylene pipe.

UNSPSC 31163231 Pipe retaining collar (Commodity) does not align with the recent state and local opportunities posted under this code. The three recorded solicitations from the Dallas Area Rapid Transit Authority (DART)—posted January through February 2026—all concern piston ring assemblies (oil high pressure, oil low pressure, and compression high pressure variants), not pipe retaining collars. The opportunities specify purchase orders for multi-piece ring and piston assemblies required for transit vehicle maintenance or repair, suggesting either a data-coding error in DART's tagging or a significant mismatch between the UNSPSC descriptor and actual procurement content.

Activity under this code shows no geographic or issuing-body diversity in recent months. All three bids come from the Dallas Area Rapid Transit Authority in Texas, with response deadlines of January 28, 2026 (solicitation 2097610), and March 20, 2026 (solicitations 2098136 and 2098137). All three opportunities require BONFIRE registration to view full specifications and bidding tables, impose FOB Destination with freight included in price, demand Net 30 invoicing in triplicate to APInvoices@dart.org, and make on-time delivery a material requirement. No award values, set-aside designations, or incumbent vendors are disclosed. Unless the code experiences broader activity outside DART and outside the recent record, pursuit here faces both scope ambiguity and a narrow, single-jurisdiction buyer base.