October 12, 2012. Pervouralsk New Pipe Plant (PNTZ) had dampers installed onto all the pipes at its exhaust fumes station: this was part of the company’s program on reducing noise impact on the environment. The new equipment was installed at the three lines of dump valves (two nitrogen lines and one oxygen one), the company’s press service reports.

‘The dampers that were installed on the nitrogen lines are based on ‘a pipe inside the pipe’ principle: a new pipe is installed around the main perforated pipe, and some damping material is placed in between. The main thing that was accomplished at the oxygen line was increasing the main pipe’s diameter from 325mm to 508mm, which means all the shrill noises resulting from pressure changing from high to atmospheric will be lower, while the noise absorbing material will absorb some of the sound waves and will help to push the gas out of the pipe more evenly,’ says Valery Treskin, PNTZ’s Chief Engineer.

Some start-up and commissioning and measuring jobs are being done at the exhaust fumes station now. As soon as the station resumes its business as usual that was interrupted by a planned overhaul in the Iron Ozone 32 section, PNTZ will publicly make noise level measurements at the border of the plant’s sanitary protection zone, in the nearby villages of Samstroy, Trubposelok, Yelnichny, and Talitsa. The measuring jobs will be done by an independent lab, in the presence of the local residents.