Why are oxyacetylene torches less preferred for soldering copper pipes?

The preference against using oxyacetylene torches for soldering copper pipes largely stems from the fact that the high temperatures generated by these torches can easily cause the copper to overheat. Copper has a relatively low melting point, and when subjected to excessively high temperatures, it can become oxidized or even melt. This overheating can result in solder joints that are weak or improperly formed, leading to potential leaks and failures in plumbing systems.

In soldering applications, especially with materials like copper, it is essential to control the heat to ensure that the solder flows properly without damaging the base metal. Alternatives like propane or butane torches provide sufficient heat for soldering while minimizing the risk of overheating the copper pipe. This careful temperature control is vital to achieving strong and secure connections in plumbing.