Prevention of leakage at pipe joints

- Feb 05, 2018 -

Prevention of leakage at pipe joints

In a hydraulic system, there is a problem that leakage is liable to occur, whether it is a metal pipe joint or a hose joint. For the ferrule fittings, mostly due to the pipe by a larger external force or impact, so loose or deformation of the ferrule caused by leakage, this time should check the card is round, whether the defect edge, whether the end of the pipe Intact and the tightness of the sleeve nut, etc., but also to eliminate the pipe external force. For flared pipe fittings, most of them are over-flared, unqualified quality or many times of disassembly, resulting in leakage caused by flaring deformation or crack. In this case, the front end can be cut back for re-flaring. If you use the male and female cone pressure to seal, the leak is mostly due to the two conical surface damage, available grinding sand on the cone grinding. Some of the "о" ring by the end surface or outer diameter of the occasion sealed, the leakage of the following reasons: "о" ring aging or deformation caused by leakage; "о" ring assembly is not in place, so that the two planes When the pressure is uneven or "o" ring is cut to cause leakage; "o" ring is not compacted, resulting in insufficient amount of elastic deformation of the leak; "o" ring port too deep and cause leakage. In this regard, the need to re-select the same outer diameter and cross-section of the thick "o" ring, but also can be sealed with a slotted seal plane cutting or grinding to reduce the slot depth, so that "о" Ring has sufficient elastic deformation (compression should generally be between 0.35-0.65mm). No matter what the quality of the pipe joints where oil resistant rubber sheets, wool felt, mild steel cardboard, combination ferrules or sealants are used, first check whether the seals are damaged, deformed, aged or rough. , Then take corresponding measures.


  • Ferrule for 4sp
  • Stainless Steel 90° Female Pipe Elbow
  • Male Npt Branch Tee
  • Male Jic Union
  • Straight Thread Plug
  • Male to Male 90° Bulkhead Elbow

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