The present invention is designed to prevent intruders from invading by using city gas (LNG) pipes installed on outdoor walls of apartments, villas, townhouses, etc., and to enhance the appearance of the pipes. The security cover, which is to form a security cover for preventing intruders from rising or falling by using the city gas pipe installed on the outer wall of the building,;A vertical cover portion that is bent in a semicircle toward the front with both ends as a starting point to have a size such that a person cannot hold it by hand;;An inclined cover portion which extends integrally to the upper and lower surfaces of the vertical cover portion and narrows toward the center point;;Fitting grooves for allowing city gas pipes to be fitted to upper and lower surfaces of the inclined cover part;;It characterized in that the fixing piece is integrally formed so as to extend through the end of the inclined cover portion outside the fixing element such as nail nailed to the wall.
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