The British transition joint has the advantages of simple structure, convenient use, and no need for welding. However, in medium and high pressure hydraulic systems, improper operation often leads to leakage, which affects its promotion and use. After years of practice, we have summarized some experiences in preventing leakage of imperial transition joints and achieved good results.

(1) Pre installation

① The pre installation of imperial transition joints is an important step that directly affects the reliability of sealing. Generally, specialized pre installation devices are required. Small diameter joints can be pre installed on a vise. The specific method is to use the connector body as the base and press the nut and collar onto the pipeline. There are mainly sleeve straight pipe fittings, sleeve end straight fittings, sleeve tee fittings, etc. Even for the same batch of British transition joints from the same manufacturer, these joints have tapered holes.

The correct method is to use a connector to connect one end of the pipeline. The corresponding connection end is pre installed with the same type of connector, which to a greater extent avoids leakage problems.

(2) The end face of the pipe should be flush, and after sawing, it should be polished flush on tools such as grinding wheels. And remove burrs, clean thoroughly, blow off with high-pressure air before use.

③ During pre installation, the coaxiality between the pipeline and the imperial transition joint body should be maintained as much as possible. If the deflection of the pipeline is too large, it can also cause sealing failure.

④ The pre installation force of the British transition joint should not be too strong, so that the inner edge of the collar is just embedded in the outer wall of the pipeline, and the collar should not be significantly deformed. When connecting pipelines, the specified tightening force should be used for assembly. If the ring becomes severe during pre installation, it will lose its sealing function.

(3) It is strictly prohibited to add fillers such as sealant. Some people apply sealant to the British transition joint to achieve better sealing effect. As a result, the sealant was flushed into the liquid system, causing faults such as clogging of the silver holes in the hydraulic components.

(4) When connecting pipes, there should be sufficient deformation allowance for the pipes. Avoid tensile stress on pipelines.

(5) When connecting pipelines, avoid subjecting them to lateral forces. Excessive lateral force can lead to poor sealing.

(6) When connecting pipes with imperial transition joints, tighten them once. Avoid multiple disassembly, otherwise the sealing performance will deteriorate.