UNSPSC 31411801: Welded diaphragm seal

A type seal welded or bonded directly to the upper housing, permitting removal of the upper housing without a loss of fill fluid

UNSPSC 31411801 Welded diaphragm seal (Commodity) covers specialized sealing products that state and local governments procure for infrastructure repair and maintenance, particularly in water treatment, transportation, and equipment service applications. The code sees limited recent activity in state and local procurement, with a single substantive opportunity appearing in the dataset: the Maine Department of Transportation's May 2026 RFQ for bridge joint seals and related materials, which encompasses compression seals, silicone coated foam seals, gland seals, and supporting sealants across 76 line items. State and local issuing bodies soliciting under this code include state departments of transportation and public works, though the recent opportunities dataset shows minimal volume—most procurement tagged to this code appears to be either unrelated administrative notices or sole-source awards to specialized vendors rather than open competition.

The Maine RFQ (RFQ 17A 260427-275, response deadline June 1, 2026) represents the primary recent activity under the code, issued by the State of Maine Department of Administrative and Financial Services on behalf of MDOT to establish a Master Agreement running through June 2031 with optional extensions. Delivery spans nine MaineDOT locations across five Maine regions, with products required in manufacturer's original containers on a FOB Destination basis. A separate Notice of Intent to Award from the City of Port Orange, Florida (September 2026) for NOV Chemineer Moyno pump products and repair services also appears in the dataset but reflects a sole-source procurement rather than open competition. Geographic activity centers on Maine and Florida based on the recent record, with no widespread multi-state or multi-jurisdiction patterns evident. No specific dollar values, set-asides, or incumbent vendors are disclosed in the Maine RFQ materials, and estimated annual usage quantities are noted as evaluation figures only, not guaranteed purchase amounts.