Section 36(3) in The Static and Mobile Pressure Vessels (Unfired) Rules, 2016
(3)Minimum corrosion allowance and wear and tear allowance of 0.5mm in case of non-toxic nonflammable and flammable gas vessels and 1.5mm in case of toxic and corrosive gas vessels shall be added to the minimum calculated thickness arrived as per the fabrication code. In addition, minimum 10 per cent thinning allowance in case of formed heads shall also be considered.
