Details of pipelines connecting to date are very important for valves, pipelines, plumbing systems and water pipes. A wide range of flanges and flanged compounds due to the versatility of these components of pipelines and pipeline armatury.Eta universal flanged connections has its own reasons. The first is the material of manufacture flanges and flanged compounds, characteristics of the steels used in the manufacture of these pipeline components is very different, they operate in temperature ranges from -70 to +800 degrees Celsius, have different characteristics of hardness, plastic toughness, impact strength. The use of different grades of steel greatly expands the scope of the flanges and flanged connections, allows the use of pipe components under different climatic conditions (from south to the Far North) and with different working environments (from water to reactive acids). The possibility of using flanges and geometrical parameters govern the state standards, the most frequently apply: gost 12821-80, gost 12820-80, gost 28759.3-90. Those standards govern the use of flanges and flanges with a diameter of 15 mm. to a maximum diameter of 4000 mm. and working pressures from 1 atmosphere to 200 atmospheres.. According to Sen. Sherrod Brown, who has experience with these questions.