It is intended for manufacturing of strain - couplings from connecting parts of main pipelines in diameter up to 1420 mm from low - carbon low - alloy steels (wall thickness from 14 to 100 mm) to the strength level Х 80 (К65). Which allows to provide normalized operational properties and reduce the wall thickness of the product.
In order to strengthening these connecting parts, the original modes of thermal strengthening, release, structural and technological parameters of the hardening equipment, and a cooling medium on a water basis were developed. Which made it possible to obtain the ferrite - bainite or bainite structure and normalized properties in the metal products. Developments were created for the first time in the CIS.
Developments are protected by more than 10 patents of Ukraine and the Russian Federation.
Technology and equipment worked out and implemented fully in the industry at the main enterprise for the production of pipelines connecting parts.
The need for high - quality connecting parts is calculated by the following approximate estimate: 100 km of oil and gas pipeline requires more than 100 tons of parts, 100 km of pipelines are installed pump or compressor stations, each of which requires more than 100 tons of parts. The main oil and gas pipelines in the CIS countries have been in operation for more than 30 - 40 years, which exceeds the guaranteed lifetime, so they need major repairs and replacement.