Xiaobian knows that the majority of users are more concerned about the flat iron round flange sealing method, so Xiaobian private letter has collected some information about flat iron round flange sealing method for everyone, you can refer to:
For decades, the flat iron round flange designed by the American Standards Institute has provided a suitable sealing technology for the oil and gas industry, and it is particularly effective. But because the needs of the oil and gas industry have changed, the defects of flat iron round flanges are constantly exposed. Cost-effectiveness principles, environmental protection, and better health and safety guarantees are the three major issues facing workers and contractors in the 21st century, so people have to start thinking about new flat iron round flange sealing methods . The sealing principle of the flat iron round flange is very simple: the two sealing surfaces of the bolt squeeze the flange gaskets against each other and form a seal. However, this also results in the destruction of the seal. In order to maintain the seal, a large bolt force must be maintained. For this, the bolts need to be made larger. Larger bolts must match larger nuts, which means that larger diameter bolts are needed to create conditions for tightening the nut. Everyone knows that the larger the diameter of the bolt, the more suitable the flange becomes. The solution is to increase the wall thickness of the flange. The entire device will require a large size and weight, which becomes a special problem in offshore environments, where weight is always the main concern that people must pay attention to. And, basically, the flat iron round flange is an ineffective seal. It requires 50% of the bolt load to be used to squeeze the gasket, and the load to maintain the pressure is only 5%. ten.
However, the main design disadvantage of the flat iron round flange is that it does not guarantee no leakage. This is the shortcoming of its design: the connection is dynamic, and such as thermal expansion and undulating cyclic loading will cause movement between the flange surfaces, affect the function of the flange, and thus damage the integrity of the flange, and ultimately Causes leakage.
I will update these on the composition of flat iron round flanges. I hope it will be helpful to everyone. For more information about flat iron round flanges, please look forward to the next report.