What is a Dish-End Pressure Tank?
A dish-end tank is an industrial pressure vessel featuring curved dished heads (such as torispherical or ellipsoidal caps) welded to a cylindrical shell. Dished ends enhance pressure handling capability over flat tank ends.
Consult technical specifications at Dished Head Specifications.
Dish-End Vessel Volume Formulas
Cylinder Body Volume:
V_cylinder = π × r² × Length
Dish Ends Volume (2 Caps):
V_heads = (4 / 3) × π × r² × Dish_Depth
Total Vessel Volume:
V_total = V_cylinder + V_heads
How to Calculate Dish-End Tank Volume
- Measure Cylinder Body Diameter & Length: Measure internal cylinder shell diameter and straight length.
- Measure Dish Depth: Record internal dish head depth from tangent line to dish crown.
- Calculate Cylinder & Dish Head Volumes: Compute main cylinder body volume and dished head volumes.
- Sum Components: Add body and head volumes for total gross capacity.
Dish-End Vessel Numerical Example
For a horizontal dished-end vessel with 6 ft diameter, 12 ft cylinder length, and 1.5 ft dish head depth:
Cylinder Volume = 3.14159 × (3)² × 12 = 339.29 ft³Dish Caps Volume (2 heads) = (4/3) × 3.14159 × (3)² × 1.5 = 56.55 ft³Total Vessel Volume = 339.29 + 56.55 = 395.84 ft³ ≈ 2,961.09 US Gallons
Dish-End Pressure Vessel Sizing Reference Chart
| Vessel Sizing | Shell (D × L) × Dish Depth | US Gallons | Litres |
|---|---|---|---|
| Small Pressure Receiver | 36" × 72" × 9" (0.91m × 1.83m × 0.23m) | 350 gal | 1,325 L |
| Medium Storage Vessel | 48" × 120" × 12" (1.22m × 3.05m × 0.30m) | 1,050 gal | 3,975 L |
| Large Chemical Reactor | 72" × 144" × 18" (1.83m × 3.66m × 0.46m) | 2,750 gal | 10,409 L |
| Industrial Fermenter | 96" × 240" × 24" (2.44m × 6.10m × 0.61m) | 8,200 gal | 31,040 L |
ASME Pressure Vessel Standards & Tangent Line Rules
Dished heads are manufactured to ASME Boiler and Pressure Vessel Code (BPVC) standards. Always measure cylinder length strictly between head tangent lines to avoid double-counting dish depth.