Huaneng Nantong gas-turbine project — circulating-water pipes DN900–D2200, Jotun coal-tar epoxy
Nantong, Jiangsu Huaneng Nantong Gas Turbine Innovation Development Demonstration Project - Circulating Water Pipes & Fittings Procurement Project
Project Background
The Huaneng Nantong Gas Turbine Innovation Development Demonstration Project and its supplementary-order project are a key construction project of Jiangsu Province under the 14th Five-Year Plan and a key municipal project of Nantong for 2024. Invested and built by Huaneng Nantong Gas Turbine Power Generation Co., Ltd., the project covers an area of 21 mu with a total floor area of 27,000 square meters and equipment investment exceeding RMB 3 billion. Two H-class 745 MW gas-steam combined-cycle power generation units are planned; upon full completion expected in 2028, the plant will generate approximately 5.195 billion kWh annually with a combined-cycle efficiency of over 63.17%, reducing standard coal consumption by about 1.37 million tons per year. The completion of the project will realize the domestic application of key technologies for core hot components of H-class gas turbines, further strengthen the peak-shaving and supply-security capability of the Jiangsu power grid, and support the rapid economic development of Nantong. The new gas-steam combined-cycle peak-shaving unit works under the Huaneng Nantong Gas Turbine Innovation Development Demonstration Project and its supplementary-order project are located within the existing Huaneng Nantong Power Plant in Chongchuan District, Nantong, Jiangsu Province. The contractor for the project is Northeast Electric Power Engineering First Co., Ltd. of China Energy Engineering Group.
Supply Overview
After open bidding and multiple rounds of price comparison, Cangzhou Youcheng Pipeline Technology Co., Ltd. was selected as the supplier for this project. The circulating water pipes are welded steel pipes in various diameters, including DN900, DN1220, DN1800 and D2200, together with dozens of matching butt-welded fittings. The anti-corrosion system is a high-build coal-tar epoxy coating, using Jotun brand paints. Throughout steel pipe production, surface rust removal and anti-corrosion coating, the work was subject to resident inspection by the construction contractor's on-site representatives, and all inspection items - physical dimensions, rust-removal quality and coating thickness - passed acceptance.
