?????? Loose flange welded ring flange can be active tablets, generally supporting the plumbing fittings, expansion joints on both ends of each piece flange when the manufacturers factory directly with project pipeline equipment bolted. The purpose of using loose flange welded ring is usually in order to save material, its structure is divided into two sections, tubes and pipes connected to a head, a head made of welded rings. Flanges low grade materials, and the use of the pipe section and the pipe of the same material, to achieve the purpose of saving material. ?? Loose flange welded ring Features:? 1, and cost savings. When the pipe material particular, when the price is expensive, the cost of welding flange same material is high. ? 2, not easy welding and machining or strength required is large. Such as plastic pipe, glass pipe and the like. ? 3, to facilitate construction. Such as connecting flange bolt holes are not easy to find the corresponding positive or prevent future replacement of equipment, such as a change in the flange bolt holes.