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Contact SupplierWeld neck flanges, also known as weldneck flanges or welding neck flanges, are a type of pipe flange designed to be butt-welded to the end of a piping system or equipment. They have a long tapered neck, which extends from the flange and serves as a reinforcement and stress distribution component. Weld neck flanges are widely used in high-pressure and high-temperature applications due to their superior strength and reliability.