Which tool is used to heat pipes for soldering without an open flame?

The tool used to heat pipes for soldering without an open flame is the Electric Resistance Hand Tool. This tool operates by passing an electric current through the pipe, generating heat through electrical resistance. It allows for controlled, localized heating, which is particularly useful in situations where open flames could pose safety risks, such as near flammable materials or in confined spaces.

In addition, this method offers the advantage of not producing combustion byproducts, making it a safer and cleaner option for soldering tasks. Other tools, such as heat guns and soldering irons, can produce heat but may not be as effective for heating piping systems while eliminating the risks associated with an open flame. A flame torch, on the other hand, directly utilizes an open flame, which is not suitable for the guidelines described in this question.