Soft-solder fittings can only be used in refrigeration piping for tubing of what outer diameter or smaller?

Soft-solder fittings are specifically designed for use with smaller diameter refrigeration tubing, and the upper limit for their application is 13 mm (½ inch) in outer diameter. This limitation is essential for ensuring the integrity of the joints and preventing leaks, as soldered connections can fail under stress if used on larger diameter tubing due to the different pressures and thermal expansion characteristics involved.

Using soft solder on tubing larger than 13 mm can lead to potential failure points in the system, making it critical for safe and effective operation within refrigeration systems. Larger pipes typically require stronger joining methods, such as brazing or welding, which can better handle the demands of higher pressures and thermal loads.

Understanding these specifications helps ensure proper installation practices within refrigeration systems, maintaining efficiency and safety.