What are the leak-proof measures for ferrule fittings in use?

In the process of using the ferrule joint, the phenomenon of leakage may occur, so we can use relevant measures to prevent the occurrence of such phenomena. Its leakage prevention measures are as follows:

For the ferrule joint, mostly due to the pipeline by a large external force or impact, so that the pneumatic ball valve ferrule loosening or tube end surface deformation caused by leakage, at this time should check whether the ferrule is out of round, edge edge of the mouth with or without defects, whether the tube end is intact as well as the degree of compression of the ferrule nut, etc., but also to remove the pipeline external force. For flared pipe joints, mostly due to excessive flaring, quality is not required or repeatedly disassembled, resulting in flaring deformation or cracks caused by leakage, this time the front end can be cut off to re-flare.

Re-select the same outer diameter and cross-section of the thicker “о”-shaped ring, but also with a stop groove sealing plane for cutting or grinding to reduce the depth of the stop groove, so that the “о”-shaped ring has enough elastic deformation. In the use of oil-resistant rubber sheet, wool felt, soft steel cardboard, a combination of sealing gaskets or sealant at the leakage of the pipe joints, no matter what the material, first of all, you should check the ferrule joints seals with or without damage, deformation, aging, and roughness and so on, and then take the appropriate measures.