KIEV, June 2 - Khartsyzsk Pipe Mill, Ukraine's biggest producer of large-diameter oil and gas pipeline steel pipes, reduced output 25% year-on-year in January-May to 157,300 tons, the company said in a press release.

Khartsyzsk, which produces a quarter of Ukraine's pipes and more than 90% of the country's large-diameter pipes, produced 44,000 tons of pipes in May, the company said.