Maybe you’ve heard about Gulf of Mexico Oil Spill. Sometimes this happens in practice that the use of pressurized air in a distillation unit found a leak test failed, then it is better to use forged flanges. Forged Flanges are available in various types like Slip-On, Blinds, Welding Neck, Socket Welding, Threaded Lap-Joint, Spectacle Blinds, and Orifice. Forged Flanges are offered in all international standards. Pressure indicator used shows a pressure drop over the allowed values, but visually not found.
Generally, distillation columns and piping system are closed with blind flanges, so the location of leaks is very difficult to find, if the position lies in the closed section of isolation. Leakages in the distillation column or other part of the distillation unit are possible, because of corrosion events. The leakage lies in the distillation unit, repeatedly leak test has been conducted on the visible and palpable as well as on parts of: flange on the connection.
Transmission tools in piping system, The main equipment distillation with piping system. The cover of the inside edge condenser or cooler on the written parts above, the leakage test can easily be done, because these sections are generally not covered by piping flange, so if any leaks happened, it can be observed by naked eye, palpable or heard.
