Specifics of Flanged Pipeline Joints

Flanged pipeline joints are one of the most commonly used joint connections between pipes and components. They have their own specifics compared to other types of bolted joints. The most important parameter is the tightness, determined by the correct tightening of the screws and corrosion resistance.The main costs of any piping system are the costs of securing against liquid (Fig. 3) or gas leakage and the costs of repairing that system to prevent and eliminate leaks. A liquid leak is visible to the naked eye, while a gas leak must be indicated by special instruments and signaling sensors. Vacuum systems require special attention, as there, leakage of flange connections means loss of vacuum. On the other hand high vacuum causes a change in the preload of the bolted joints and they need to be checked frequently. In addition it should be taken into account that pipelines are often located in difficult-to-access terrain, making their inspection problematic.