Duct Calculator vs Pipe Coil Development Pro

The Duct Calculator App for iPhone/iPad is a modern take on a the classic duct sizing wheel, allowing HVAC engineers, designers and contractors quickly and accurately size a new duct or calculate the performance of an existing duct on your iOS devices. Size both round and rectangular ductwork with the ease of a traditional Ductulator. Adjust the airflow, diameter, width or height sliders with your thumbs. Get maximum precision by entering numbers directly into the the calculator. Lock friction rate, diameter or width or height to make the calculations you need for your design. Live update of the calculated values allows you to see the impact of the changes immediately. Outputs velocity for both round and rectangular ducts. PERFORM QUICK AND ACCURATE CALCULATIONS: Enter the airflow and sizes in directly as numbers for maximum precision. - or - Use the airflow and size sliders for quick calculations. Shows live equivalent round/rectangular duct sizes. Specific dimensions can be locked to allow specific what-ifs to be quickly calculated. Works for both IP and SI units. You can select from a range of duct roughness categories. Designed to allow quick calculations anywhere, anytime, it is ideal for the HVAC designer or contractor. HOW TO USE: Locking Dimensions: The lock symbols to the right of the duct dimensions indicate if that particular dimension is locked when calculating new equivalent values when a dimension is updated. The Diameter can be locked or unlocked. The Width or Height can be locked, but not both. Using the Sliders: Move the sliders for Airflow, Duct Diameter, Width and Height up and down to match the desired duct size to calculate velocity and pressure drop for. The Diameter, Width and Height will change such that the equivalent size is shown: Changing the diameter will updated either the equivalent Width or the Height, depending on which dimension is unlocked. Changing the Width or Height will update the equivalent Diameter if it is unlocked, or the other rectangular duct dimension of the Diameter size is locked. Direct Entry: The values for Airflow, Diameter, Width and Height can be directly edited in the text boxes to allow quick entry of exact numbers. Invalid entries will generate an error message, and must be corrected prior to the calculations updating. Output: The values for the calculated Velocity for Round Duct and Rectangular Duct are shown, as is the Pressure Drop per Length value. NOTES: This application (App) is provided for use by qualified HVAC engineers and designers in the design of air handling systems and is not a substitute for appropriate design services. When in doubt, contact a design professional.

Pipe Coil Calculator is a professional fabrication and engineering tool for calculating pipe coil lengths, limpet coil lengths, half-pipe jacket lengths, and coil development layouts used in process equipment manufacturing. It is designed for fabrication engineers, mechanical engineers, pressure vessel fabricators, process equipment manufacturers, estimators, and workshop professionals working with reactors, agitators, mixers, pressure vessels, and other industrial equipment. Available Calculators 1. Internal / External Helical Coil Calculate the required length of internal or external helical pipe coils for vessels and industrial equipment. Useful for coil fabrication, material estimation, and costing. 2. Shell Limpet / Half-Pipe Jacket Coil Calculate the required length of limpet coil or half-pipe jacket installed on cylindrical shells. Inputs include shell diameter, number of turns, and coil pitch. The result can be used for fabrication planning, material estimation, and costing. 3. Dish End Limpet Coil Calculate the required length of limpet coil installed on pressure vessel dish ends using coil starting arc distance, number of turns, and pitch. 4. Dish End Limpet Development Develop sector-based layouts for fabricating half-pipe jackets on dish ends. Inputs include: • Dish crown radius • Dish thickness • Pipe coil outside diameter • Pipe thickness • Coil pitch • Sector starting distance • Sector ending distance The calculator provides development information for individual sectors to simplify dish end limpet coil layout and fabrication. Key Features • Internal and external helical coil length • Shell limpet coil length • Half-pipe jacket length • Dish end limpet coil length • Dish end limpet development • Sector-based coil layout • Coil pitch and turn calculations • Shell and dish end calculations • Cord distance consideration for practical coil-end matching • Metric and Imperial units • mm and inch dimensions • Automatic unit conversion • Fabrication-friendly results • Simple and professional interface • Fast calculations • No internet connection required • No distracting advertisements Applications Pipe Coil Calculator is useful for: • Pressure Vessel Fabrication • Process Equipment Manufacturing • Chemical Reactors • Agitators and Mixers • Jacketed Vessels • Storage Equipment • Industrial Process Equipment • Limpet Coil Fabrication • Half-Pipe Jacket Fabrication • Coil Rolling and Fabrication • Material Estimation and Costing Whether you need to calculate a helical pipe coil, shell limpet coil, dish end coil, or develop sectors for a half-pipe jacket, Pipe Coil Calculator provides practical calculation tools for everyday fabrication and engineering work. For fabrication layouts, use appropriate dimensions and allowances according to your actual manufacturing method and project requirements.