The shape of the spherical tank is spherical and ellipsoidal. The vast majority are single-layer spherical shells. When storing liquefied gas at low temperature and low pressure, double spherical shells are used, and thermal insulation materials are filled between the two spherical shells. The most widely used is the single-layer spherical spherical tank. The spherical shell is made of a plurality of spherical petals pressed into a spherical surface and welded together by the orange petal split method, the football split split method or the football orange split hybrid split method. The most common supporting structure of spherical tank is equatorial tangent type, followed by symmetrical type, skirt type, semi-buried type and basin type. The ellipsoid spherical tank is usually used to store liquid hydrocarbons (such as gasoline, etc.) with a saturated vapor pressure slightly higher than atmospheric pressure and strong volatility at room temperature. When the volume is larger, the compound ellipsoid spherical tank should be used.

Many oil and gas producers prefer spherical tanks to store high-pressure fluidsover other simpler tank designs.
Why is this?Here are a few of the reasons.