The appearance of ASTM A105 and A182 socket-welded flanges is similar to that of slip-on flanges, but the key difference lies in the design of the bore. A socket-welded flange has a bore that matches the specific inside diameter of the pipe, allowing the pipe to be inserted into the flange. The backside of the flange is designed to fit snugly over the outside diameter of the pipe, creating a secure connection when welded. This design ensures a stronger, more reliable joint, especially for high-pressure and small-diameter piping systems.
