Can someone put me wise on the significance/purpose of the following design specifications for bulk flammable substance/liquid storages:- 1. Cone Roof Tanks 2. Dished Ends on Horizontal Tanks 3. Sperical and Torpedo Shaped Tanks Appreciate any help! P

Comment (may not be relevant!) The stresses in the walls of a spherical tank are much smaller (half) than the maximum stress in the wall of a cylindrical tank.

Spherical and dished end tanks are designed for a specific pressure. Cone roof tanks do no have any overpressure, so the walls and foundations are designed for just the static pressure (liquid weight) when the tank is full. Spherical tanks have a history of cracking in service around the leg connections, so now used much less than horizontal cylinders with dished ends. None of these designs are specific to flammable liquids (for example cone tanks are also common for water, cylinders are used for bulk nitrogen and carbon dioxide), but in each case the vessel/tank should be designed, constructed and pressure tested to a specific design code, then inspected and maintained in accordance with that code throughout its life.