Design and Modeling of a Liquefied Petroleum Gas Storage Tank

Abstract

A pressure vessel is defined as a container with a pressure differential between inside and outside. The inside pressure is usually higher than the outside pressure. High pressure rise is developed in the pressure vessel and pressure vessel has to withstand severe forces. So the selection of pressure vessel is most critical. In Sudan pressure vessel industry is limited to domestic LPG containers. This is due to the fact that higher capacity pressure vessel should be fabricated from alloy steel which are not available in the local market. In this research an attempt was made to design 1.75 MPa, 3.75 cubic meter LPG vessel made of Mild steel. The design was carried as per ASME BOILER & PRESSURE VESSEL CODE Sec VIII and was verified using ANSYS package. The dimension obtained was 2000 mm length and 1400mm diameter using 15 mm thickness St 37-2 Miled steel Sheets. The factor of safety came to be equal to 1.2. The study concluded that LPG pressure vessels could be made of Mild steel for sizes up to 1400 mm diameters with different volumes using different lengths.