Refrigerant Pipe Sizing Calculator
Static · formula-only · worked example computed when this page was built · no live data
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. Anything the worked example does not state uses this calculator's standard default; the interactive version shows every input and lets you change it.
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 by WorkHive's calculation engine when this page was built; standard: ASHRAE 2022 Refrig. Hbk Ch.1 | ASTM B280 | ASHRAE 90.1 | PSME.
How to use this calculator
- Read the worked example. It uses a 30 kW R410A air-conditioning circuit (7 / 45 °C) and shows every number in the method.
- Follow the formula with your own figures: it returns Suction line OD, Liquid line OD, Discharge line OD, computed per ASHRAE 2022 Refrigeration Handbook | ASTM B280.
- To compute interactively, open the Refrigerant Pipe Sizing Calculator inside WorkHive's free Engineering Design suite (link below). It runs the same method with your inputs.
FAQ
What is a refrigerant pipe sizing calculator R410A?
The Refrigerant Pipe Sizing Calculator is a free online tool that 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 is free: this worked example is open to everyone, and the interactive calculator runs inside the free Engineering Design suite after a free sign-up (your work is saved to your account). 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, and a free sign-up saves your calculations, BOMs and scope-of-works to your account.