ZiO-Podolsk, Power engineering plant in Podolsk, Russia

ZiO-Podolsk is a manufacturing facility that produces steam boilers and equipment for thermal and nuclear power stations. The plant also supplies components for gas processing and petrochemical industries.

Founded in 1919 as the Podolsk steam locomotive repair plant on the site of an unfinished cable factory, it repaired its first locomotive, series Shch-61, on 2 May 1919. Renamed KRED in 1931, it made the USSR's first cracking unit that year. On 8 April 1939 it became the Podolsk machine-building plant named after Ordzhonikidze, at the workers' request. In 1992 it was reorganised as a joint-stock company.

The plant's name comes from Ordzhonikidze, the People's Commissar of Heavy Industry, whose name workers asked to attach to the factory in 1939. Its design bureau, KB-10, later OKB Gidropress, worked under Igor Kurchatov and Nikolai Dollezhal on the Obninsk plant, the world's first nuclear power station, connected to the grid in 1954.

The operation occupies a large industrial complex with multiple production areas and engineering centers. Access to active manufacturing sections may be restricted during visits.

The plant's design bureau, KB-10 (later OKB Gidropress), worked under Igor Kurchatov and Nikolai Dollezhal on the Obninsk project; its reactor started up on 27 June 1954 as the world's first nuclear power station. In 1957 the plant began producing PGV-1 steam generators for Novovoronezh unit 1, the first horizontal steam generator with vertical cylindrical coolant headers.