What is the common method for joining two pieces of pipe that are not connected by threads?

Welding is a widely used method for joining two pieces of pipe that do not have threaded connections. This process involves fusing the materials together by applying high heat, effectively melting the edges of the pipes to create a strong, permanent bond once cooled. Welding is essential in many piping applications because it provides a seamless connection, minimizing the risk of leaks and ensuring structural integrity under pressure.

In many industrial applications, welded joints can withstand higher pressures and temperatures compared to other joining methods, making it an ideal choice for situations where durability and reliability are paramount. The ability to use various welding techniques, such as MIG, TIG, or stick welding, further enhances its applicability across different materials and thicknesses.

Other joining methods, while effective in specific circumstances, do not offer the same level of mechanical strength or suitability for high-pressure applications as welding does. Soldering, for instance, is typically used for joining copper pipes but is not appropriate for larger diameter pipes. Clamp connectors provide a simple connection but may not offer the same integrity under high-pressure conditions as a welded joint. Adhesive bonding can be effective for certain materials but is generally less reliable than welding for critical piping applications.