What type of pipes require bevelled edges for welding?

Bevelled edges are essential for larger pipes when welding because they facilitate proper fusion during the welding process. The bevel creates a groove that allows the welding material to penetrate more deeply, ensuring a strong weld that can withstand the pressure and stress that larger pipes typically experience.

In addition, larger pipes often have thicker walls compared to smaller pipes. As a result, these thicker sections require deeper weld penetration, which is more effectively achieved with bevelled edges. This technique helps to ensure the integrity and strength of the joint, minimizing the risk of leaks or structural failures.

While small diameter pipes may also be welded, they typically do not require bevelled edges since their thinner walls can be adequately joined with simpler techniques. PVC and copper pipes are generally joined using different methods such as solvent welding or soldering, respectively, which do not involve welding techniques that require bevelled edges.