Rubber joint is a commonly seen flexible connectors, it can efficiently compensate the pipeline displacement. When the rubber joint installed in different places, we should take different measures to protect it.

When installed in straight pipeline, rubber joint plays function of compensating lateral displacement, and remit inner medium’s axial thrust, if diameter is larger than 200mm or pressure is larger than 1.6MPA, the inhibiting device is needed.

When installed in pipeline turning, the inhibiting device is needed as well. What’s more support and buttress is necessary. Since during the running of pipeline, medium will have a strong impact force on turning inwall, that’s the reason why these protective devices are needed.

When installed nearby pump valve, it should consider the inner negative pressure when open the pipeline, if the negative pressure is large, the negative pressure ring should be installed in inner rubber joint. In this way to make sure the stable and safe running of whole pipeline system.