PETS FAQ's
Use the PETS 5 FAQ’s menu provided on the left to navigate through the site. View the videos below for additional information about the ToolS. Contact us with any questions not found below.
PETS FAQ's General Questions
Yes multiple ToolS up to 20 Windows can be opened in PETS at a time.
The following requirements should be met for PETS® to operate normally on your computer:
- XVGA (1024 x 768) or better graphics is recommended.
- Windows 7 or higher.
- 60 MB of hard disk space for minimum installation.
Yes, PETS files can be imported from one file to another.
Yes PETS is completely backwards compatible all versions of PETS files will open in the new Version of PETS.
Many of the ToolS have GET buttons:
- GET Fluid Data
- GET Liquid Density
- GET Density and Vapor Press
- GET Frictional Line Loss & Fluid Height
- GET Suct Properties
- GET Disch Properties
- GET Continuous Phase Properties
- GET Drop Density
- GET Tube Side Properties
- GET Shell Side Properties
- GET Liquid Viscosity
Allowing importation of certain data from one Tool to another Tool within the same file. If data in Tool is changed the data imported does not automatically change it has to be refreshed by selecting the button again. Each of these GET buttons pull data from certain types of files. If the Tool has not been used then an error message will be displayed for example No Streams that you can use exist. Create Streams from which to get properties.
The Activation Key and Program download link will be emailed. If you do not receive email please check your Spam or Junk Folder.
To avoid emails ending up in your Spam or Junk Folders add ProcessEngineeringToolS.com to your Safe Senders / Whitelist.
If the Trial version of PETS 5.0 is installed on your machine. Skip Step 1 and go to Step 2.
Step 1. Download the Link provided PETS SOFTWARE DOWNLOAD LINK. Use the License Key included in the email message to activate your PETS software.
Step 2. How to Install PETS 5.0 with PETS Trial installed – Start the PETS Trial Software –> Go to Help Menu –> Software License –> Accept the License –> License Activation –> Select Yes to allow QLM License Wizard changes –> Activate License –> Enter the purchased License Key (found in the email) –> Activate. –> Restart PETS for the new license to take effect.
The Help File within Process Engineering ToolS has instructions for each tool. The Help File is also provided as a .pdf file for download on the website under the Support Menu and Manual tab. You can also Go to Support Menu and then to Training (Videos) to get additional help with using Process Engineering ToolS.
PETS FAQ's Pressure Drop
Pipe Pressure Drop Questions
Yes, The Pipe Pressure Drop Tool calculates single, two-phase and compressible fluid flow losses through cylindrical conduits such as pipe.
Yes, Standard pipe sizes are coded into PETS®. Non-standard sizes may also be used.
No, the GET Button does not automatically regenerate data it will have to be used again to import any updated information from another Tool.
The Hughmark method is used for determining the liquid hold-up or liquid slip.
The Friedel correlation is used for two-phase frictional pressure drops.
The Darcy equation is used to evaluate single phase liquid and vapor pipe-flow pressure drops.
Fittings Equivalent Lengths Questions
The Equivalent Lengths Tool calculates equivalent length of pipe of various types of pipefittings. A series of fittings, including straight pipe, can be included so that the total equivalent length of a circuit or pipe run can be determined at once.
Yes, Standard pipe sizes are coded into PETS®. Non-standard sizes may also be used.
40,000,000 is the default Reynolds number (Turbulent) but different number can be entered by user.
PETS has two Tee Wizards the Converging Tee Branch Wizard: Two Streams Combine into One Stream and Diverging Tee Branch Wizard: One Stream splits into Two Streams.
The Orifice Wizards in PETS provide equivalent length/K estimations for Reducers/Orifices and Expanders/Orifices.
Additional K can be entered to account for unknown fitting or to add contingency to the final K and Equivalent Length.
Orifice/Venturi Questions
The Orifice/Venturi Tool sizes new orifices or calculates the pressure drop or flow of existing orifices. This Tool also evaluates restriction orifices, choked and critical flow orifices and venturi meters.
Yes, Standard pipe sizes are coded into PETS®. Non-standard sizes may also be used.
No, the GET Button does not automatically regenerate data it will have to be used again to import any updated information from another Tool.
The Orifice / Venturi options are Orifice Square Edged, Orifice Choked/Critical Flow, Orifice Restriction Thick, Orifice Quadrant Edged, or Venturi. For Venturi meters select Rough Cast, Machined or Sheet Metal.
Critical flow occurs when the downstream pressure is less than the critical flow pressure. If the vapor downstream pressure is less than half the upstream pressure, critical flow is likely. Not all flow elements are capable of producing critical flow.
The liquid choked flow calculations assume you have choked flow conditions. Choked flow occurs when the pressure within the flow element drops below the fluid’s vapor pressure.
Pipe System Hydraulics Questions
The System Hydraulic Tool provides hydraulic analysis of a system of 1 to 8 pipes in series. A pump and control valve can be added to the system. Liquid, compressible vapor, or two-phase flow may be analyzed. This Tool combines the functions of pipe pressure drop, fittings equivalent lengths, control valves, pump horsepower, and pump NPSH.
Yes, Standard pipe sizes are coded into PETS®. Non-standard sizes may also be used.
No, the GET Button does not automatically regenerate data it will have to be used again to import any updated information from another Tool.
Changes made will update when pipe system hydraulics are refreshed.
When compressible calculations fail. Non-Compressible results are presented but are not as accurate as compressible calculations.
Elevation Change: +Up, -Down Vapor density isothermally lowered with pressure.
Convert Pipe Diameter Questions
The Convert Pipe Diameter Tool converts equivalent lengths of various pipe diameters to a single pipe diameter equivalent length, or converts the equivalent length of one pipe diameter to the equivalent length of another pipe diameter.
Yes, Standard pipe sizes are coded into PETS®. Non-standard sizes may also be used.
No, the GET Button does not automatically regenerate data it will have to be used again to import any updated information from another Tool.
Turbulent flow Friction Factor assumed.
Control Valve Questions
The Control Valve Tool calculates the required Cv/Kv, pressure drop or flow through a gas or liquid control valve. Globe, butterfly, ball, angle or rotary eccentric valves may be selected. Valves can be evaluated with or without inlet and outlet reducers. Choked/critical flow is checked.
Yes, Standard pipe sizes are coded into PETS®. Non-standard sizes may also be used.
No, the GET Button does not automatically regenerate data it will have to be used again to import any updated information from another Tool.
The Tool has 5 Types of Control valves it calculates for Globe-Generic, Butterfly-Generic, Ball-Generic, Angle-Generic, or Rotary-Eccentric-Generic.
This is not a required input. The Tool’s calculations will have a lower accuracy without valve size.
PETS FAQ's Relief
ATM Tank Fill/Outbreathing Questions
The Atmospheric Tank Fill/Thermal Outbreathing tool calculates the vent flows required for tank filling and thermal outbreathing.
Tank Insulation offers 3 options User Entered, Full or Partial insulation. An Insulation Therm Cond Help button is provided with thermal conductivity values for various mediums for a range of average insulation temperatures.
Default value for latitude factor is 0.32. Lat Factor Help button provides the Y-Factor for various latitudes.
Check the box to force the more conservative Volatile liquid calculation. Volatile liquids have a vapor pressure > 0.73 psia (5.0 kPa(a))
- Cylinder Fixed/Cone roof tank assumed
- 3/4 x 12 Roof Slope Assumed for Area & Vol
- Assumed no liquid flashing & Z=1
- SCFH=Std ft3/hr @ 60ºF & 14.696 psia
- NCMH=Normal m3/hr @ 0ºC & 101.325 kPa(a)[14.696 psia]
ATM Tank Empty/Inbreathing Questions
The Atmospheric Tank Empty/Thermal Inbreathing tool calculates the vent flows required for tank emptying and thermal inbreathing.
Tank Insulation offers 3 options User Entered, Full or Partial insulation. An Insulation Therm Cond Help button is provided with thermal conductivity values for various mediums for a range of average insulation temperatures.
Default value for latitude factor is 0.32. Lat Factor Help button provides the Y-Factor for various latitudes.
Check the box to force the more conservative High VapP liquid calculation. High VapP Liquid: Vapor Pressure > Hexane VapP.
- Cylinder Fixed/Cone roof tank assumed
- 3/4 x 12 Roof Slope Assumed for Area & Vol
- Assumed no liquid flashing & Z=1
- SCFH=Std ft3/hr @ 60ºF & 14.696 psia
- NCMH=Normal m3/hr @ 0ºC & 101.325 kPa(a)[14.696 psia]
Depressuring Questions
The Depressuring tool calculates the time it takes to depressure a given system volume or the depressuring orifice diameter. The Tool is used for all gas service.
Thermal Expansion Flow Questions
The Thermal Expansion Relief Flow – Liquid tool calculates the required relief flow due to liquid thermal expansion from Solar, Ambient and Additional thermal inputs.
PETS FAQ's Pump
Pump Horsepower Questions
The Pump Horsepower Tool calculates hydraulic, brake, and driver horsepower required for a given pump application. The Tool also determines the pressure increase across the pump in ft of head and psi.
Pump NPSH Questions
The Pump NPSH Tool calculates pump net positive suction head available and pump suction pressure. Adjustments for PD pumps are available.
Pump Curve Questions
The Pump Curve Tool graphically presents pump performance and system hydraulic data for analysis. Two impeller diameters or two pump speeds can be evaluated with this Tool using the Affinity Laws.
PETS FAQ's Compressor
The Compressor Horsepower Tool allows the calculation of compressor horsepower, adiabatic head, and estimated theoretical and actual outlet temperatures.
PETS FAQ's Drum
Drum Sizing Questions
The Separator Drum Sizing Tool allows evaluation of Gas/Liquid, Gas/Liquid/Liquid and Liquid/Liquid separation equipment. Liquid residence times, nozzle and vessel velocities, rhoV2, drop size and demister efficiency are calculated.
Drop Settling Questions
The Droplet Sizing Tool allows evaluation of vapor-liquid and liquid-liquid droplet separation.
PETS FAQ's Column Diameter & Tray Hydraulics
The Column Diameter and Tray Hydraulic Tool allows both sizing of column diameter, rigorous rating of valve tray column internals, 1,2, or 4 pass trays may be used in sizing or rating. A variety of tray deck and valve thicknesses and valve materials are selectable. Tray is the only internals option at this time.
PETS FAQ's Heat Exchangers
Simple Shell & Tube Questions
The Shell & Tube Heat Exchanger Tool provides simplified analysis of heat exchanger thermal performance. The Tool calculates any missing data with the information supplied. Straight line heating and cooling curves are assumed for all options.
Rigorous Air-Cooled Exchanger Questions
The Air-Cooled Heat Exchanger – Single Phase Tool provides rigorous analysis of single phase air-coolers. Straight line heating and cooling curves are assumed for all options. Regardless of the calculation selected, the Tool attempts to calculate any missing data with the information supplied.
Rigorous Shell & Tube Questions
The Rigorous Shell & Tube Heat Exchanger tool allows use of physical properties calculations to rigorously evaluate single phase exchanger performance. Two-phase exchangers such as condensers and reboilers cannot yet be examined with this Tool. The Tool calculates any missing data with the information supplied.
PETS FAQ's Physical Properties
Stream Properties/Flash Questions
The Stream Properties/Flash Tool calculates physical properties and multicomponent flashes using the Soave-Redlich-Kwong (SRK) or Ideal methods. 65 compounds plus petroleum pseudocomponents can be used to build a stream containing up to 50 components. You can save each stream you build as a User Stream for later use or to use in other ToolS; Perform bubble point, dew point, or temperature and pressure flash calculations. If the SRK method does not solve, or if you prefer, you may use Ideal thermodynamic relationships.
Steam Tables Questions
The Steam Tables Tool provide IAWPS97 water and steam physical and thermodynamic property data.
ASTM Conversions Questions
The ASTM Conversions Tool converts distillation data between ATM D86, TBP, ASTM D1160 and ASTM D2887. The data can be plotted.
NaOH/Caustic Questions
The Aqueous Liquid NaOH/Caustic Tool calculates physical properties for a caustic stream at a specified caustic weight percent and temperature.
Liquid Viscosity Blending Questions
The Liquid Hydrocarbon Viscosity Blending Tool estimates the viscosity of a liquid hydrocarbon blend at a single temperature given the individual component’s viscosities at that temperature.
Hydrocarbon Density Estimate Questions
Hydrocarbon Density Estimate: given a hydrocarbon density at one temperature, calculates the hydrocarbon density at other temperatures.
PETS FAQ's Project Payout
The Payout Tool allows economic evaluation of project payout. Simple Payout in years, Percent Return on Investment (ROI), Profit Net Present Worth (Value), and Net Present Cost may all be calculated.
PETS FAQ's Geometry, Tanks
Volume and Area Questions
The Volume and Area Calculations Tool calculates the Total Volume and Total Surface area including heads if any, for: Spheres, Horizontal Cylinders, Vertical Cylinders (Tanks), Spheroid/Ellipsoid or Circles. The Tool also calculates Volume and Surface Area between low level and high level if levels are entered.
Level Alarms Questions
The Level Alarms Tool calculates the total volume, volume between operational stops and alarm levels given times or alarm times given levels for: Spheres, Horizontal Cylinders, Vertical Cylinders (Tanks), Spheroid/Ellipsoid and Circles.