Section 56(2)(d) in The West Bengal Factories Rules, 1958
(d)metal bottles or cylinder or pressure vessels used for storage or transport of compressed gases or liquid or dissolved gases under pressure covered by the Gas Cylinder Rules, 1981 and the Static and Mobile Pressure Vessels (Unfired) Rules, 1981 framed under the Indian Explosives Act, 1884 (4 of 1884);