What must be done to the edges of larger pipes prior to welding?

When preparing larger pipes for welding, the edges need to be beveled. Beveling the edges creates an angled surface at the joint, which allows for better penetration of the welding material. This is crucial for achieving a strong and durable weld. A proper bevel also helps to ensure that the weld metal can fill the gap between the two pipes effectively, leading to improved structural integrity.

Additionally, beveling helps to reduce the chances of defects in the weld, such as incomplete fusion or unsound welds. It facilitates the welding process by allowing for proper alignment and more effective heat distribution during welding. Overall, beveling is an essential step in pipe preparation that ensures the quality of the welded joint.