Biport Bulkers Sdn. Bhd.
A. CALCULATION OF TANK CAPACITY
1. 2600 MT Capacity
Fluid density = 0.9 kg/liter
Fluid storage volume = 2600 tonne / 0.9 kg/liter
= 2888.89 m3
Pre-determine tank size:
Based on tank ratio of height to diameter = 1.1 (normal practice)
Minimum tank diameter = (4 x 2888.89/π/1.1) ^ 0.3333
= 14.95m
Maximum tank height = 14.95m x 1.1
= 16.44m
Height of tank plate/course = 5 ft x 12 x 0.0254
= 1.524m
Number of tank course = 16.44/1.524
= 10.79
Actual number of tank course is 11 nos.
Therefore, maximum tank height = 11 x 1.524 m
= 16.764m
Allow free board space of 0.3m;
So that, effective tank height = 16.764m – 0.30m
= 16.464 m
Required tank diameter = (4 x 2888.89/ π/16.46)^ 0.5
= 14.95 m
Length of shell plate = 20 ft x 12 x 0.0254
= 6.096m
Number of shell plate/course = π x 14.95/6.096
= 7.7
Actual number of shell plate/course is 8 nos.
Actual tank diameter = 8 x 6.096/ π
= 15.523m
1
Biport Bulkers Sdn. Bhd.
Summary:
Actual storage capacity = π x (15.523)2 x 16.464 x 0.9/4
= 2804.38 m3
Extra capacity = 2804.38 – 2600
= 204.38 m3
Actual tank diameter = 15.523 m
Actual tank height = 16.764 m
Height to diameter ratio = 16.764/15.523
= 1.08
2. 2000 MT Capacity
Fluid density = 0.9 kg/liter
Fluid storage volume = 2000 tonne / 0.9 kg/liter
= 2222.22 m3
Pre-determine tank size:
Based on 2600MT tank height = 16.746 m
Height of tank plate/course = 1.524m
Number of tank course = 11
Allow free board space of 0.3m;
So that, effective tank height = 16.764m – 0.30m
= 16.464 m
Required tank diameter = (4 x 2222.22/ π/16.464)^ 0.5
= 13.11 m
Length of shell plate = 20 ft x 12 x 0.0254
= 6.096m
Number of shell plate/course = π x 13.11/6.096
= 6.76
Actual number of shell plate/course is 7 nos.
Actual tank diameter = 7 x 6.096/ π
= 13.583 m
2
Biport Bulkers Sdn. Bhd.
Summary:
Actual storage capacity = π x (13.583)2 x 16.464 x 0.9/4
= 2147.10 m3
Extra capacity = 2147.10 – 2000
= 147.10 m3
Actual tank diameter = 13.583 m
Actual tank height = 16.764 m
Height to diameter ratio = 16.764/13.583
= 1.23
3. 1000 MT Capacity
Fluid density = 0.9 kg/liter
Fluid storage volume = 1000 tonne / 0.9 kg/liter
= 1111.11 m3
Pre-determine tank size:
Based on 2600MT tank height = 16.746 m
Height of tank plate/course = 1.524m
Number of tank course = 11
Allow free board space of 0.3m;
So that, effective tank height = 16.764m – 0.30m
= 16.464 m
Required tank diameter = (4 x 1111.11/ π/16.464)^ 0.5
= 9.27 m
Length of shell plate = 20 ft x 12 x 0.0254
= 6.096m
Number of shell plate/course = π x 9.27/6.096
= 4.78
Actual number of shell plate/course is 5 nos.
3
Biport Bulkers Sdn. Bhd.
Actual tank diameter = 5 x 6.096/ π
= 9.702 m
Summary:
Actual storage capacity = π x (9.702)2 x 16.464 x 0.9/4
= 1095.46 m3
Extra capacity = 1095.46 – 1000
= 95.46 m3
Actual tank diameter = 9.702 m
Actual tank height = 16.764 m
Height to diameter ratio = 16.764/9.702
= 1.73
4. 650 MT Capacity
Fluid density = 0.9 kg/liter
Fluid storage volume = 650 tonne / 0.9 kg/liter
= 722.22 m3
Pre-determine tank size:
Based on 2600MT tank height = 16.746 m
Height of tank plate/course = 1.524m
Number of tank course = 11
Allow free board space of 0.3m;
So that, effective tank height = 16.764m – 0.30m
= 16.464 m
Required tank diameter = (4 x 722.22/ π/16.464)^ 0.5
= 7.47 m
Length of shell plate = 20 ft x 12 x 0.0254
= 6.096m
Number of shell plate/course = π x 7.47/6.096
= 3.85
4
Biport Bulkers Sdn. Bhd.
Actual number of shell plate/course is 4 nos.
Actual tank diameter = 4 x 6.096/ π
= 7.762 m
Summary:
Actual storage capacity = π x (7.762)2 x 16.464 x 0.9/4
= 701.10 m3
Extra capacity = 701.10 – 650
= 51.1 m3
Actual tank diameter = 7.762 m
Actual tank height = 16.764 m
Height to diameter ratio = 16.764/7.762
= 2.16
5. Summary
The tank sizing can be summarized as follows:
Tank Capacity (tonne) 2600 2000 1000 650
Fluid density (kg/liter) 0.9 0.9 0.9 0.9
Fluid storage volume (m3) 2888.89 2222.22 1111.11 722.22
Actual storage capacity (tonne) 2804.38 2147.10 1095.46 701.10
Actual tank height (m) 16.764 16.764 16.764 16.764
No. of tank course 11 11 11 11
Actual tank diameter (m) 15.523 13.583 9.702 7.762
No. of shell plate 8 7 5 4
Height to diameter ratio 1.08 1.23 1.73 2.16
