The supplier needs the approved pipe sizes; it should not have to infer them from a room size or a brief AC capacity description. Obtain the line requirements from the equipment documentation and responsible designer or technician, then turn them into a clear materials enquiry.
Record each line separately
List each required tube diameter, length and unit without combining two different lines into one ambiguous description. Include the equipment model and the design revision supporting the sizes. If the route or selected unit changes, ask the responsible professional to review the requirements before updating the order; do not reuse a size from an unrelated installation.
Check the associated items
Add insulation sizes, compatible fittings and specified supports to the list as separate lines. Compare supplier responses against that same schedule. Do not treat diameter alone as a complete material specification: application, material condition and other design requirements still matter. Confirm the selected references and actual availability with the branch before arranging collection.
A practical enquiry example
For two refrigerant lines with different diameters, write two numbered material lines and two lengths. A single combined quantity makes it harder to check whether both diameters have been included in the supplier response.
Enquiry checklist
- Approved diameter for each line
- Lengths and units
- Equipment model and design revision
- Insulation, fittings and supports
Can AC capacity alone determine every pipe size?
No universal shortcut should be assumed. Use the model-specific and approved design requirements for the installation.
Discuss your requirement with Refco
Prepare the approved references and quantities, then contact the branch to confirm availability and collection details before visiting.
