Section 22(3) in The Static and Mobile Pressure Vessels (Unfired) Rules, 2016
(3)The number of above ground storage vessels in one group shall not exceed six. Spherical, cylindrical, mounded and underground vessels shall be installed in separate groups. Minimum separation distance between two such groups of vessels shall be the distance from the vessel to property line in accordance as mentioned in Tables under this rule as the case may be, or thirty metres whichever is less. Each such group of vessels shall be covered under separate license under these rules.
