Flame arrester for gas pipeline

The utility model relates to the technical field of pipeline fire prevention, and discloses a flame arrester for a gas pipeline, which comprises a flame arrester main body, flame arrester flanges are arranged on the outer walls of the two sides of the flame arrester main body, screw rods are arranged on the outer walls of the flame arrester flanges, and locking nuts are in threaded connection with the outer walls of the two sides of the screw rods. According to the principle of heat transfer effect and wall effect, when a flame pipeline butt joint pipe enters the inner wall of the flame arrester main body, flames are divided into a plurality of fine flame flows by the metal net, the flames are extinguished after passing through the flame arresting core and the buffer shell, and if the temperature of the flames entering the pipeline butt joint pipe is too high or the fire behavior is too large, the flames can be extinguished after passing through the flame arresting core and the buffer shell. And through repul