NIGP 40033: Castings, Ductile Iron

NIGP Item 40033, Castings, Ductile Iron, covers the procurement of ductile iron components—primarily pipe, fittings, spools, and valve boxes—that state and local water utilities and departments purchase for distribution system construction, maintenance, and repair. Recent solicitations show water utilities buying finished ductile iron pipe in multiple diameters for main line installation, smaller repair parts and fittings for in-service maintenance, cast iron valve boxes and lids for access and control, and specialty items such as ductile iron spools. The issuing bodies are primarily municipal water departments and county water resources divisions, with occasional participation from broader city procurement offices acting on behalf of utility clients. Water utilities dominate the code's activity; these are repeat buyers across jurisdictions, conducting regular replenishment solicitations for both master supply agreements and spot purchases.

Recent activity clusters in Texas and Georgia, with single recent solicitations in Wisconsin and ongoing activity across other states. The City of Dallas issued an IFB (BG2600030409) on May 14, 2026, to establish a five-year ID/IQ master agreement for ductile iron pipe supply to its Water Utilities department, with bid deadline June 12, 2026. Gwinnett County, Georgia, posted three separate informal quotations in May 2026 for ductile iron repair parts, spools, and pipe fittings (response deadlines May 18, 2026), and an earlier IWQ 128859 for ductile iron pipe nipples with polyethylene coating (due April 23, 2026). The City of Madison Finance Department issued RFQ 5508-0-2026-BG on March 3, 2026, for centrifugally cast ductile iron pipe in three diameters with ANSI/AWWA C151/A21.51 compliance, due March 17, 2026. The City of Fort Worth released RFP 26-0068 on January 26, 2026, seeking cast iron valve boxes and lids with a 30 percent small business participation goal and proposals due February 19, 2026. Specifications across solicitations consistently reference ANSI and AWWA standards; deliveries are tied to specific utility facilities; and evaluation emphasizes cost, past performance, and local or small business participation where applicable.