A typical application in the petrochemical industry is so-called steam cracking. In addition to being resistant to aggressive chemicals, seals must withstand high temperatures and pressures. In a convection-capable furnace for heating the bottom product, for example, there are temperatures of up to +600 °C (+1,112 °F) with simultaneous pressure and vaporization. During the subsequent cracking of the resulting gas, the temperatures increase further to +850 °C (+1,562 °F). The real challenge for seals is, however, in the intense temperature changes that occur during the subsequent cooling of the gas.
The seal must also withstand the pressure increase during the compression of the cracked gas to about 30 bar. The absorption of gases requires the use of chemicals, in particular caustic solution. The API 682 Standard for making seals for petroleum industry is a good example.
Do You Have Any Questions Or Need Consultation?