Pipe Coil Development Pro vs PIDTune Usage & Stats
This App Calculate Limpet Coil Layout Development, Shell Limpet Coil Length, Dish End Limpet Coil Length, Internal / External Pipe Coil Length. It is also useful for Half Pipe Coil Jacket Length Calculation and Half Pipe Jacket Coil Length on Dish Ends and Shell.
Unit Setting Options for mm/inches available
In This application Following Four Types of Pipe Coil Development Tool available :
1. Internal or External Helical Coil Length Calculator.
2. Limpet Coil on Shell or Shell Half Pipe Jacket Coil Length Calcultor.
3. Dish End Limpet Coil Length Calculator.
4. Dish End Limpet Development.
for Dish End Limpet Development Half Pipe Jacket is fabricated by making Coil in Sectors so for Lay outing of Limpet Coil Sector is made easy in this application. You have to give input as Dish Crown Radius, Dish Thickness, Pipe Coil OD, Pipe Thickness, Pitch of Coil and Each sector Starting and Ending Distance.
For Limpet Development you have dd some extra length is cord distance so that you can get perfect matching of coil ends quality workmanship. and you have to calculate layout of each sector seperatly.
Limpet Coil jacket is also called as Half Pipe Coil Jacket.
Calculate Required Length of Limpet Coil on Shell and Dish Ends used in Reactor, Agitator or Mixer, Pressure Vessels or any other Process Equipment.
In This App length of Coil for Limpet on Shell Calculate by using Input as Shell Diameter, No. of Turns, Pitch of the Coil. You Can Easily estimate length for Coil for Costing and estimating Purpose.
In This App Length of Coil on Dish End is Calculate using Input as Coil staring Arc Distance, No of Turns of Coil and Pitch of the Coil.
You can Use this Tool for Coil Fabrication and Rolling Coil for Required vessels application.
This App is very useful for those who are working in fabrications of Process equipment's, Agitator/Mixers, Chemical Reactor, Pressure Vessels etc.
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PID Tuner uses the IMC (Internal Model Control) method to calculate PID tuning parameters. I’ve tried a lot of tuning methods over the years and have found this one to be the best. The app is written for the iPad to show all the information on one page.
The program calculates:
PID Parameters:
Controller Gain (Kc)
Integral Time (Ti)
Derivative Time (Td)
For process types
First Order with Dead Time (FO)
Second Order with Dead Time (SO)
Integrating or Long Time Constant with Dead Time (I)
For controller types
Parallel (non-interacting)
c(s) = Kc (1 + 1/(Ti s) + Td s)
Series (interacting)
c(s) = Kc (Ti s + 1)/(Ti s)(Td s + 1)
For controller modes
PID
PI
You can either enter the process gain (Kp) directly or enter the changes in the controlled virable (CV) and manipulated variable (MV).
Tuning aggression is adjusted using the slider to set the closed loop time constant to the process time constant ratio (λ/Ƭ).
The closed loop time constant (λ) is the time the controller is expected to reach set point (plus the dead time (ϴ)). Setting the closed loop time constant to process time constant ratio (λ/Ƭ) to 1.0 will make the MV change to its final value and allow the process to settle out to the setpoint. Setting (λ/Ƭ) greater than 1.0 will give a slower responce. Setting (λ/Ƭ) less than 1.0 will cause the MV to make a larger change and then reduce to its final value. Tight tuning would be to set the close loop time constant to the dead time.
Use the Integrating Process type (Ƭ = ∞) for both integrating processes or processes with long time constants. These processes use the maximum slope as the process gain. Tuning aggression for these processes is determined by setting the closed loop time constant to the dead time ratio (λ/ϴ). Once again, setting the closed loop time constat to the dead time gives tight control.
References:
“Probably the test simple PID tuning rules in the World,” Sigurd Skogestad, Jounal of Process Control, July 3, 2001
“Consider the generalized IMC-PID method for PID controller tuning of time-delay processes,” Y. Lee, S. Park, M. Lee, Hydrocarbon Processing, January 2006
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Pipe Coil Development Pro VS. 
PIDTuneJanuary 8, 2025