Refrigerant Pipe Sizing Calculator
The Refrigerant Pipe Sizing Calculator picks the suction, liquid, and discharge line sizes for a refrigeration circuit. Example: for a 30 kW R410A air-conditioning circuit (7 / 45 °C), Suction line OD = 34.93 mm, Liquid line OD = 15.88 mm, Discharge line OD = 15.88 mm (per ASHRAE 2022 Refrig. Hbk Ch.1 | ASTM B280 | ASHRAE 90.1 | PSME).
How it works
Computed from your inputs per ASHRAE 2022 Refrig. Hbk Ch.1 | ASTM B280 | ASHRAE 90.1 | PSME.
Worked example (HVAC & Cooling)
Inputs: a 30 kW R410A air-conditioning circuit (7 / 45 °C).
| Result | Value |
|---|---|
| Suction line OD | 34.93 mm |
| Liquid line OD | 15.88 mm |
| Discharge line OD | 15.88 mm |
Computed live by WorkHive's calculation engine; standard: ASHRAE 2022 Refrig. Hbk Ch.1 | ASTM B280 | ASHRAE 90.1 | PSME.
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses a 30 kW R410A air-conditioning circuit (7 / 45 °C).
- The calculator returns Suction line OD, Liquid line OD, Discharge line OD, computed per ASHRAE 2022 Refrigeration Handbook | ASTM B280.
- Check the worked example to confirm the method matches how you would do it by hand, then run your own numbers in the interactive tool.
FAQ
What is a refrigerant pipe sizing calculator R410A?
The Refrigerant Pipe Sizing Calculator is a free online tool that computes picks the suction, liquid, and discharge line sizes for a refrigeration circuit. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following ASHRAE 2022 Refrigeration Handbook | ASTM B280. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive's engineering calculators are free to use, no sign-up needed for the tools. WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Refrigerant Pipe Sizing Calculator in WorkHive: free, no sign-up needed for the calculators.