Oxygen pipeline sealing performance improving method

Abstract

An embodiment of the invention discloses an oxygen pipeline sealing performance improving method. The method is applied to an aviation oxygen pipeline. The oxygen pipeline comprises a jacket nut 2 anda pipe joint 5. The method comprises the steps of wiping alcohol at the threaded connection position of the jacket nut 2 and the pipe joint 5; coating the outer surface behind 2-3 threads of the pipejoint 5 with antioxidant grease; screwing down the jacket nut 2 and the pipe joint 5, and wiping away redundant antioxidant grease by using cotton cloth dipped with alcohol; carrying out air tightness inspection on the oxygen pipeline; and coating the exposed surfaces of the jacket nut 2 and the pipe joint 5 with a hard film slow release agent.

Description

technical field [0001] This application relates to but is not limited to the field of aviation technology, especially a method for improving the airtightness of an oxygen pipeline. Background technique [0002] At present, military and civilian oxygen pipelines at home and abroad generally use flared pipeline components, including conduits, jacket nuts, pipe joints, flat nozzles and other components. During the production process of the pipe joint, the use of tooling clamping may damage the outer film layer of the tee joint; the plating layer may also be bumped during the turnover and transportation process; Cause damage to the outer surface of the pipe joint, resulting in a reduction in the thickness of the coating, and even the direct exposure of the substrate. Since there are no follow-up preventive measures, an electrochemical reaction will occur in an environment with high humidity, which will accelerate the corrosion of the outer surface of the pipe joint. [0003] D...

AI Technical Summary

Problems solved by technology

The extensive use of this non-standard leak detection reagent is very likely to introduce corrosive elements into the oxygen system, resulting in corrosion on the surface of pipeline components, and stress corrosion failure under stress

On the other hand, during the airtight test, in order to quickly judge whether the joint is airtight, the operator applies a large amount of soap solution to the joint with a brush, observes for 2 to 3 minutes, and then wipes it with a flannel cloth. At this time, part of the soap water has penetrated into the joint. joint gap, cannot be removed

At the same time, due to the narrow operating space of some pipeline joints on the aircraft, it is very difficult to completely remove soapy water with flannelette, resulting in non-volatile components remaining at the joints. With the increase of the aircraft delivery calendar year, the pipelines coated with soapy water Corrosion occurs on the surface of the component

Images