What do you call the joint used to connect pipes without welding?

The correct term for the joint used to connect pipes without welding is a mechanical joint. Mechanical joints are designed to provide a secure connection between pipes using various mechanical means such as bolts, clamps, or fittings. This method allows for easier assembly and disassembly, making it advantageous for construction and maintenance work in plumbing systems.

Mechanical joints are particularly beneficial because they reduce the need for heat, which can be a safety risk, and avoid material distortion that can occur with welding. They are commonly used in applications such as water and gas pipelines, where flexibility and the ability to easily disconnect or replace sections of pipe are important.

In contrast, solder joints involve heating metal components and applying solder, which requires significant skill and can be time-consuming. Flanged joints consist of two flanges bolted together with gaskets, providing a strong seal but typically requiring more space and additional components. Glue joints utilize adhesive for connection but are not as commonly recommended for all types of plumbing applications, particularly where higher pressures or temperatures are involved. Thus, when considering a non-welding connection method, mechanical joints are the most suitable and widely used option.