What is the benefit of using pipe joint compound when making up a screwed joint?

Using pipe joint compound when making up a screwed joint is beneficial primarily because it lubricates the threads. This lubrication facilitates easier assembly and disassembly of the joints, as it reduces friction between the threads. When the threads are lubricated, it also helps in achieving a tighter seal, preventing leaks and ensuring that the joint is secure under pressure.

The compound fills in small imperfections in the threads, providing a more effective seal and helping to prevent the joint from binding or becoming stuck. This is crucial in sewage treatment systems, as leaks can lead to significant operational problems and must be avoided.

In instances where a joint is being assembled, lubrication is essential for ensuring the threads turn smoothly together. If the threads were unlubricated, they would bind more easily and make correct alignment challenging, leading to potential cross-threading. Thus, the lubrication provided by the compound not only aids in assembly but also contributes to the overall integrity of the joint.