Application of flat welding flange. The structure is simple and the processing is convenient. Its force characteristics are between the integral flange and the loose flange. Flat welding flanges are divided into Type A flat welding flanges and Type B flat welding flanges when used on vessels.
The flat welding flanges used on pressure vessels are divided into Type A flat welding flanges and Type B flat welding flanges.
①A-type flat welding flange is directly welded to the container, and its unwelded seam size is small or not beveled. It cannot guarantee that the flange and the container are stressed at the same time. The strength calculation refers to the loose flange.
②Type B flat welding flanges are generally attached with a thicker short cylinder. The welding quality of the flange and the short cylinder is reliable, which can ensure that the flange and the container are stressed at the same time. The strength calculation can be considered based on the integral flange. Type B flat welding flanges are widely used in the connection of medium and low pressure vessels and pipelines
Both advantages and disadvantages: Type B flange has a short cylinder, so it has better rigidity than Type A flange, and can be used in occasions with higher pressure and larger diameter; Type A is V-shaped groove, and Type B is U-shaped Groove, so type B is easier to penetrate, so its strength and rigidity are higher