New York Low Pressure Boiler COF Practice

Brass pipes cannot be joined by which method?

1. Welding

2. Threading

3. Solder

4. Brazing

The correct answer is: Solder

Brass pipes are typically joined through various methods, but soldering is not one of them. This is because soldering involves using a filler material that melts at lower temperatures (usually below 450°C or 840°F) to join two metals. Brass, being an alloy primarily composed of copper and zinc, can be adversely affected by the heat and the chemicals in the solder. The high temperature required to properly solder can also lead to the deterioration of the zinc content in the brass, compromising the integrity of the joint. In contrast, methods such as brazing and welding (though less common for brass) use higher temperatures and can create strong, secure joints without detrimental effects on the brass itself. Threading is a widely accepted method for connecting brass pipes, ensuring a tight fit while avoiding the need for heat application that could damage the material.