What type of joint is often used when joining steel pipes?

When joining steel pipes, both welded and threaded joints are commonly used, each serving different applications and requirements based on the specific conditions of the installation.

Welded joints create a continuous connection between the pipes, providing a strong and permanent bond that is highly resistant to pressure and temperature fluctuations. This type of joint is particularly beneficial in high-pressure systems or where the integrity of the joint is critical for safety and performance. Welding also helps in maintaining a smooth internal pipe surface, minimizing turbulence and pressure drop.

On the other hand, threaded joints offer ease of installation and disassembly, making them ideal for applications that may require future maintenance or changes. They are particularly useful in situations wherein rigid connections are necessary but where permanent welding is not desired. Threaded joints are convenient for connecting smaller diameter pipes and for situations where access for installation may be limited.

Using both methods allows for flexibility to meet the specific needs of different projects, whether requiring the robustness of welding or the adaptability of threading. This combination is commonly found in various plumbing, heating, and piping systems across industries.