Section 23 in The Static and Mobile Pressure Vessels (Unfired) Rules, 2016
23. Foundations for pressure vessels.
(1)General. - The materials, principles, methods and details of design and construction of foundations and supports of vessels shall comply with approved specifications, standards or codes.(2)Ground conditions. - A thorough knowledge of the ground condition shall be obtained by the person installing the vessel with particular reference to establishing an allowable bearing pressure, total and differential settlements expected, risk of floatation and possible deterioration of original conditions.(3)Materials. -(i)The choice of materials for construction shall be determined by the ground conditions, loading and detailed design constructions.(ii)The materials may be of -(a)brick-work masonry;(b)re-in forced concrete; or(c)steel plate, steel pipe or structural steel.(4)Loading. - The greatest combined effect of static and imposed loading shall be used for design as under:-(a)Static loading : weight of vessel and its contents;(b)test loading if tested by water;(c)wind loading;(d)operational loading such as vibration or thermal (natural and operational);(e)Seismic loading for foundation.(5)Settlement. - Any particular differential settlement shall be limited to prevent excessive stress in the connected pipe work and vessel shell.(6)Vessel supports. -(i)the design of supports for vessels shall follow the standard or code to which the vessel is constructed;(ii)the spacing of vessel support shall be decided after close consideration of vessel-shell stressing and transmission of the loadings to the ground;(iii)the design of supports for vessels shall provide flexibility to allow for movement of the vessel as a result of pressure and thermal expansion;(iv)the vessel shall be securely anchored or weighed or provided with adequate pier height to avoid floatation due to flood water;(v)in case of structural steel supports such supports, excluding vessel saddles or supporting feet 45 cm or less in height, shall be encased in fire-resisting materials of adequate thickness.(7)Underground and mounded vessels. - Foundation supports and installation methodology shall conform to Schedule III.
