How to prevent leaks at hose joints

In the hydraulic system, whether it is a metal pipe joint or a hose joint, there is a problem of easy leakage. For ferrule type pipe joints, most of the pipes are subjected to a large external force or impact force, which causes the ferrule to be loose or the end face of the pipe is deformed to cause leakage. It is in good condition and the compression degree of the ferrule nut, etc., and also eliminates the external force of the pipeline. For flared pipe joints, mostly due to excessive flaring, unsatisfactory quality or repeated disassembly, resulting in leakage of flared deformation or cracks, at this time, the front end can be cut off and flared again.

If the male and female cone top pressure is used for sealing, the leakage is mostly due to the damage of the two cone surfaces, and the cone surfaces can be ground with grinding sand. In some occasions where the "о" ring is sealed against the end face or the outer diameter, the reasons for the leakage are as follows: "о" ring is aging or deformed and causes leakage; "о" ring is not assembled properly, so that the two planes are connected. The time pressure is uneven or the "о" ring is cut to cause leakage; the "о" ring is not compacted, and the elastic deformation is insufficient to cause leakage; the "о" ring groove is too deep to cause leakage. In this regard, it is necessary to re-select the "о" ring with the same outer diameter and thicker section, or the sealing plane with the spigot can be cut or ground to reduce the depth of the spigot and make the "о" The ring has sufficient elastic deformation (compression should generally be between 0.35-0.65mm). For leaks at pipe joints using oil-resistant rubber sheets, wool felt, mild steel cardboard, combined sealing gaskets or sealants, no matter what the material is, first check whether the seals are damaged, deformed, aged and rough, etc. , and then take appropriate action.