Buckling Restraint System of Expansion Joints for LNG Shipments

摘要

The present invention relates to an anti-buckling device for a telescopic pipe installed in a pipe for an LNG carrier that transports liquefied natural gas (hereinafter referred to as "LNG"), and improves the stability of pressure by improving the structure of the telescopic pipe to increase and decrease the amount of piping. Even if this size is increased, it is possible to prevent the expansion joint from being bent. To this end, in the present invention, the first and second bellows portions 20 and 30 are welded and fixed to a pair of flanges 11, and a cylindrical portion 40 is provided between the first and second bellows portions 20 and 30. In the apparatus for preventing the buckling of a telescopic pipe of an LNG ship pipe fixed with welding), first and second bellows portions 20 and 30 are welded and fixed to a pair of flanges 11, and the first and second bellows portions ( Between the 20) 30, in the expansion joint pipe buckling prevention device of the pipe for the LNG ship, the cylindrical portion 40 is welded and fixed, and welded and fixed to the outer circumferential surface of the pair of flanges 11 at equal intervals A plurality of lugs 60 formed with 60a, and insertion holes 70a located on the same axis as the insertion holes 60a formed in the respective lugs 60 are formed to form the outer circumferential surface of the cylindrical portion 40. The guide member 70 fixed by welding, and inserted through the insertion holes 60a and 70a formed in each of the lugs 60 and the guide member 70, and fixed to the flange 11 by a fastening member 90 It is characterized by consisting of a stud bolt (80).