New Mexico Pipe Fitter Journeyman (JPF) Practice Exam

Which type of plastic pipe is characterized by its ability to handle higher temperatures?

1. Thermoplastic

2. Thermoset

3. Polyethylene

4. Polypropylene

The correct answer is: Thermoset

The type of plastic pipe characterized by its ability to handle higher temperatures is thermoset. Thermoset plastics undergo a curing process that forms bonds which enhance their stability and resistance to high temperatures, making them suitable for applications that require durability under heat. Unlike thermoplastics, which soften when heated, thermosets maintain their shape and structural integrity even at elevated temperatures. In applications where heat resistance is crucial, such as in certain industrial or plumbing environments, thermoset materials provide a reliable option. This enhanced resistance is often utilized in scenarios where other plastics may fail due to deformation or degradation when subjected to heat. While thermoplastics can be versatile and used across a variety of applications, they generally do not possess the same high-temperature durability as thermosets. Polyethylene and polypropylene are both thermoplastics noted for their chemical resistance and flexibility but are typically not the best choice when high-temperature applications are necessary.