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Dimensions of Dished Ends for Pressure Vessels like Boiler, Reactor, Storage Tank


According to IS 4049 (Part-2): 1996 and Table 2 Dimensions for Dished and Flanged Ends (Torispherical)

  • Inside Crown Radius is 80% of ID

  • Inside knuckles Radius is 10% of ID and in no case less than 6% nor less than 3 x thickness of Dish.

  •  Inside height of Dish can be calculated according to IS: 2825 – 1969 and IS 4049 (Part-2) : 1996 as follows:
  • Now the Inside height can be calculated according to IS: 4179 – 1997 which is as follows: 
  1. When Knuckle Radius is 10% of ID 
 
      2. When Knuckle Radius is 6% of ID
          Where hi = Inside height of Dish
                      Ri = Crown Radius of Dish
                      ri = Knuckle radius of Dish
                      Di = Inside diameter of Dish 
                      Sf = Straight Flange length of Dish
  •  Minimum length of straight flange shall be 3 x thickness of Dish or 20 mm but not exceed 38 mm except when necessary to provide required length of taper.
 

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  2. Top Kids' school4 May 2022 at 14:49

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