Draining Time for Vertical Tanks Calculator

Tank Data
Tank Inner Diameter (ft): (What's this?)	Tank Inner Diameter: Close
Vessel Head Type: (Help)	2:1 Elliptical Flat Hemispherical Conical Typical Vessel Head Types: Close
Cone Angle (deg): (What's this?)	The Cone Angle is the angle measured from the horizontal bottom seam of the tank, to theconical bottom. This is applicable only for vessels with a conical head. Close
Initial Liquid Level (ft): (What's this?)	Initial Liquid Level: Close
Final Liquid Level (ft): (What's this?)	Final Liquid Level: Close
Distance to Pipe Outlet (ft): (What's this?)	Distance to Pipe Outlet: Close
Fluid and Piping Data
Nominal Pipe Size:	0.5 0.75 1.0 1.5 2.0 2.5 3.0 4.0 5.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 24.0
Pipe Schedule:	SCH40 SCH80 SCH160
Piping Material:	Asphalted Cast Iron Cast Iron Clean Commercial Steel Pipe Drawn Tubing Fiberglass Pipe Galvanized Iron PVC Pipe
Viscosity (cP): (Typical Values)	Typical Viscosity Values Gasoline @ 70F 0.6 SAE 30 Oil @ 70F 300.0 Water @ 70F 1.0 Close
Specific Gravity: (Typical Values)	Typical Specific Gravity Values Gasoline @ 70F 0.750 SAE 30 Oil @ 70F 0.898 Water @ 70F 1.000 Close
Temperature: (F)
Piping Length (ft):
Flanged or Butt-Welded Elbows
Long Radius Elbows:
Short Radius Elbows:
5 Diameter Elbows:
45 Degree Elbows:
Threaded Elbows
45 Degree Elbows:
90 Degree Elbows:
Tees
Tee Flow Through:
Tee Flow Branch:
Valves
Gate Valves:
Globe Valves:
Swing Check Valves:
Lift Check Valves:
3 Way Plug Valves:
Ball Valves:
Plug Valves:
Butterfly Valves (2 to 8 in.):
Butterfly Valves (10 to 14 in.):
Butterfly Valves (Greater than 14in.):
Angle Valves (Flow Up):
Angle Valves (Flow Down):
Entrance and Exits
Pipe Entrance:
Pipe Exit:
Increasers and Reducers
Number of Increasers:
Increaser Outlet Size (in):
Number of Reducers:
Reducer Outlet Size (in):
Precent Addition to Clean Pressure Drop: (Help)	Increasse In Pressure Drop Due to Scale, Dirt, and Corrosion Some piping systems will experience corrosion, scaling, dirt accumulation, etc. This accumlation will decrease the inner diameter avaliable for flow and change the roughness of the pipe. Both these changes will increase the pressure drop in the system. A typical increase is 20% of the clean pressure drop. If you would like to add this use factor to your calculation enter the percent increase desired below. Close

  

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