What are the particular refrigerant tube requirements for R410A?
Because of the higher working pressures involved with air conditioning systems working on refrigerant R410A, it is necessary to consider the wall thickness of the refrigerant tube used during installation, particularly on the high side (e.g. the liquid line). The wall thickness of the normal soft and half hard copper tube that we offer in sizes up to and including 7/8″ is also suitable for use with R410A on both the high and low side. e.g. for liquid and suction lines. Half hard copper tube in straight lengths from 1.1/8″ upwards may require tubes with a thicker wall than is used on say R407c (or R22), particularly on the high side. The British Refrigeration Association has published guidelines for these larger tubes, which are available if required. Download BRA Fact Finder Number 7 (27K Acrobat file). When making a tight radius bend, regard should be given to the possibility that the wall thickness of the tube on the outside of the bend may be reduced to an unacceptable level. This i
