What is the term for a semirigid conduit made of materials such as copper or plastic?

The term "tubing" accurately describes a semirigid conduit made from materials such as copper or plastic. Tubing is typically defined as hollow cylindrical structures that can be used for various applications, including plumbing and electrical systems. It is particularly noted for being either flexible or semirigid, which allows it to adapt to different installation environments and requirements.

In the context of mechanical code and installation practices, tubing is often specified for its ability to carry fluids or cover electrical wiring while providing certain protective characteristics against environmental factors. Copper tubing, for instance, is frequently utilized for its durability and resistance to corrosion, while plastic tubing may be favored for its lightweight and ease of installation.

Other terms listed, like "pipe," generally refer to more rigid structures specifically designed for transporting liquids or gases and may not necessarily encompass the properties of semirigid materials. "Conduit" typically refers to enclosed pathways for electrical wires, which may include both rigid and flexible options but does not capture the nuanced definition associated with tubing. Lastly, "hose" suggests a flexible, often rubber or plastic construction primarily used for carrying liquids, which differs from the structural characteristics of tubing. Overall, tubing stands out as the correct terminology in this context.