Buoyancy Calculation (5.6kn Tank)

Buoyancy Calculation Components Involved 1.

Cylindrical Tank: (OD = 650 mm, WT = 5 mm, L = 2400 mm)


 =  − 2 = 650 − 2 5 = 640  



 =     −
   ×  =   650 − 640  × 2400 =  !! 2.

3.

4.

5.

End Plate: (d = 640 mm, t = 5 mm, )

" "  =  #  × $ =  640   × 5 = %&' !! 4 4 Internal Circular Plate: (OD = 640 mm, ID = 540 mm, t = 5 mm)

" " ( =    −
   × $ =  640 − 540  × 5 = %' !! 4 4 Rectangular Steel Plate: (Dimension = 640 x 70 x 5 mm)

 = 640 × 70 × 5 = &&& !! Pipe Support Steel Plate: (Dimension: 200 x 180 x 5 mm, with 2 Rectangular Sections of 25 x 100 x 5 mm cut)

* = 200 × 180 × 5 − 2 25 × 100 × 5 = &&& !!

6.

7.

Fastening Belt Support Steel Plate: (Dimension: 140 x 180 x 5 mm, with 2 Rectangular Sections of 25 x 100 x 5 mm cut)

- = 140 × 180 × 5 − 2 25 × 100 × 5 = &&&& !! Round Bar: (d = 25 mm, l = 180 mm) "  " # × / =  25   × 180 = '' !! 4 4 Padeye: (Assumed Rectangular Dimension = 150 x 40 mm, t = 8 mm) . =

8.

9.

0 = 150 × 40 × 8 = '&&& !! Socket/Plug: (Assumed Dimension: od = 25 mm, id = 15 mm, l = 50 mm) " " 1 =  2# − 3#  × / =  25 − 15  × 50 =  &' !! 4 4

Total Volume 4 =  + 2 ×  + 2 × ( + 4 ×  + 4 × * + 4 × - + 8 × . + 2 × 0 + 2 × 1 = 24315927 + 2 1608495 + 2 463385 + 4 224000 + 4 155000 + 4 101000 + 8 88357 + 2 48000 + 2 15708 =  !!

Total Weight 4 = 4 × 89:;;< = 31213959 × 10=1 × 7850 = . & ?@

Buoyancy Force 

AB = :CDE × 8FC:;G = H  × 650 × 2400I × 10=1  × 1025 = '%. & ?@

Nett Buoyancy JD;:: = AB − 4 = 816.30 − 245.03 = 571.27 KL = . %& ?M