Gas pipeline to prevent tempering the principle

[Gas pipeline to prevent tempering the principle of] gas pipeline to prevent tempering device which is mounted in line to take over after the acetylene pressure gauge, gas welding gas cutting process to backfire in the play the role of prevention. Avoid flame into the cylinder , an explosion of temper prevent the basic requirements:. ① reliably prevent flashback and explosion wave propagation, and can cause explosive gases into the atmosphere to exclude rapidly. ② should have a pressure relief device. ③ to meet the requirements of the welding process, such as flame temperature does not affect the gas flow. ④ easy to control, inspection, cleaning and maintenance. ⑤ In the event of tempering the best can automatically cut off the gas source. Tempering prevention device classification: ① according to the working pressure into low pressure type (0. OIMPa less), medium-pressure (..01 ~ 0 15MPa.) ② tempering prevention device according to the action principle can be divided into water-sealed and dry tempering prevention device. ③ by means of different parts can be divided into centralized and job type tempering prevention device. Tempering prevention device of construction: Most of the current domestic use of water-sealed to prevent tempering. Water-sealed to prevent tempering of use should be aware of the following safety requirements: ① device within not less than the amount of water level gauge calibration requirements. The water level should not be too high to prevent excessive acetylene with water, the impact of the flame temperature. After each backfire should always check the water level and make up. In addition, it should prevent tempering with vertical hanging place. ② winter when, after the end of the work should be all the water put the net, to prevent freezing. In the event of freezing phenomenon, only with hot water or steam to thaw, bake prohibited open flame or red iron. ③ each post to prevent tempering only for a welding or cutting torch alone. ④ acetylene prone viscous oil impurity band, and therefore should always check the tightness of the check valve. ⑤ mixed gas within preceded drain device acetylene and oxygen.