METHOD FOR MANUFACTURING LPG TANK

摘要

PURPOSE: A method for manufacturing a LPG(Liquefied Petroleum Gas) tank is provided to improve the stiffness of the tank, minimize fraction defective, and reduce manufacturing costs. CONSTITUTION: A method comprises a first step of forming a first cylinder section(1) and a second cylinder section(2) through a drawing process in such a manner that first and second cylinder sections are coupled to form a rectangular tank; a second step of curling the end of an open portion among first and second cylinder sections and forming a groove having a smaller diameter than first and second cylinder sections; and a third step of inserting the end of the other cylinder section into the groove and welding the resultant structure.