UNSPSC 40173400: Pipe plate flanges

UNSPSC 40173400 Pipe plate flanges is a Class code that in practice encompasses pipe fittings and connectors used in municipal water, wastewater, and stormwater infrastructure repair and replacement projects. State and local governments procure pipe flanges, wyes, and related fittings as component materials within larger sewer and water system rehabilitation work, typically bundled into construction contracts alongside labor and equipment rather than as standalone material purchases. Issuing bodies include county sanitation districts, county public works departments, and municipal infrastructure agencies. Work solicited under the code involves removal and replacement of aging pipe systems (vitrified clay pipe, cast iron) with modern alternatives (PVC, HDPE) and installation of service connection fittings and mainline extensions in sanitary sewer systems.

Santa Clara County appears as the primary recent activity source, with two infrastructure rehabilitation projects posted between April and August 2026. The County Sanitation District No. 2-3 Structural Defect Repair Project Phase 2 (ITB ITBRDAFY270088, due September 17, 2026) specified removal and replacement of twenty-seven 4"×6" wyes, two 4"×8" wyes, and two 4"×10" wyes alongside pipe segments totaling approximately 1,500 linear feet across multiple diameters. Santa Clara County's Central Expressway Pavement Rehabilitation Project (ITB ITBRDAFY260694, due May 21, 2026) did not reference pipe flanges explicitly in available summaries but included comprehensive infrastructure improvements typical of projects where such fittings are specified. Recent activity concentrates in California, specifically in Santa Clara County's unincorporated eastern foothills and countywide transportation corridors.