The method of attaching this type of flange to the pipe is that the pipe is inserted in such a way that the pipe thickness plus 1.6 mm to 3.2 mm from the plate inside it is welded in and out. This type of flange is used for regular services. It is easy to install and easy to align the pipe. It is not necessary to cut the pipe to a precise length and precision tolerance. It costs more to mount the flange and equals 1/3 of the calculated fatigue resistance under internal pressure 2 / 3 and its long-term resistance to fatigue. Its use for ASME Classes 300 and 150 is available for all presses and is standard and generally suitable for places where the flange is not available and its internal weld is more corroded than the flange.