Loose flange

Loose flange refers to a flange loosely sleeved on the flange of a vessel or pipe. Flanges are parts connecting shafts, which are used to connect pipe ends; It is also used for flanges on the inlet and outlet of equipment for connection between two equipment

Looped flanges are loose flanges. The lug can be made by flanging, directly turning out or welding ring. The advantage is that no additional torque will be generated to the container or pipe when the flange is deformed, which is convenient to manufacture. It can be made of materials different from the container or pipe, which is convenient to save precious metals. The disadvantage is that the flange thickness is large. It is suitable for vessels or pipes lined with brittle materials with low pressure

Advantages of loose flange: the flange can be rotated during installation to prevent misalignment of bolt holes. When installing long pipelines, the bolt holes are misaligned

2. There are many turning places, especially in chemical plants. Many flanges on equipment are not in place in midspan

3. Due to the particularity of steel lined pipes (no place to cut the length), and the deviation made by the manufacturer

Use method of loose flange:

Use flanging, steel ring, etc. to cover the flange on the pipe end, and the flange can move on the pipe end. The steel ring or flange is the sealing surface, and the role of the flange is to compress them. It can be seen that the plate loose flange is not in contact with the medium because it is blocked by the steel ring or flanging. Because the flange is movable, it is not directly connected with the pipe

There are many types of loose flange sealing surface, generally including convex, concave, convex, mortise, full plane and ring joint surface. Loose flange is simple in structure, small in size, compact and excellent, easy to operate and maintain, pressure resistant, and mainly based on actual reports

Loose flange is widely used in petroleum, chemical, food, dairy, pharmaceutical, machinery manufacturing, sewage treatment, municipal water supply pipeline, fire protection pipeline and other industries