Horizontal Mounded Bullets Horizontal Mounded Bullets are for bulk storage of liquefied petroleum gas (LPG). Mounded storage is generally safer than other methods of storing the highly inflammable LPG. Mounded LPG Bullets are large, buried, horizontal cylindrical steel tanks with dished ends of size ranging between 3.5 to 8.5 diameter and lengths of 35 to 70 meters or more. Mounded bullets allow storage of large quantities of LPG, up to 2,000 MT. KNM designs horizontal mounded bullets according to design codes PD 5500, ASME Section VIII Div 1 or 2, Australia Standard and A.D. Merkblätter and EEMUA standards.