UNSPSC 31311501: Aluminum welded or brazed pipe assemblies

UNSPSC 31311501 Aluminum welded or brazed pipe assemblies is a Commodity-level code that state and local governments use to classify metal piping components used in infrastructure construction and water treatment projects. Recent solicitations show that procurement under this code actually spans industrial piping systems, ductile iron piping assemblies, reinforced concrete tanks with integrated mechanical systems, and as-needed supply contracts for HDPE and PVC pipe with fittings—a broader scope than the code's nominal "aluminum" designation suggests. The mix of issuing bodies includes county water departments, municipal public works agencies, and city utilities pursuing capital projects and annual supply agreements. Collier County, Florida appears as a repeat buyer, with multiple bids posted for water treatment plant improvements and drainage infrastructure through 2026.

Recent activity concentrates in Florida and Arizona. Collier County, Florida issued IFB 26-8683R in September 2026 for construction of lime softening improvements and a blend tank at the South County Regional Water Treatment Plant, with bids due September 21, 2026 for a $4.27 million project requiring ductile iron piping (180 linear feet of 42-inch and 130 linear feet of 36-inch), Schedule 80 CPVC chemical injection systems, and reinforced concrete structures; substantial completion is required within 277 calendar days with liquidated damages of $2,312 per calendar day. The City of Phoenix Public Works Department issued IFB 26-SW-0379 in August 2026 for supply of industrial pipe and miscellaneous fittings on an as-needed basis to three Phoenix airports, with a three-year term commencing December 1, 2026 and covering HDPE pipe from 1.5 to 24 inches and PVC pipe from 0.75 to 4 inches; delivery is required within 24 to 48 hours from purchase order date. The City of Augusta, Georgia solicited bids in September 2026 under ITB 27-116 for various HDPE pipe, couplings, and end sections for stormwater down-drain installation and maintenance, with a one-year term and four optional one-year renewals, pricing on as-needed orders with no minimum order amounts accepted.