The stainless steel flange connection means that two pipes, fittings or equipment are first fixed to each other on a flange. Between the two flanges, pads are added and bolted together to complete the connection. Some fittings and fixtures have their own flanges and are also flanged. Stainless steel flanges have a threaded flange and a welded flange. It is a disc-shaped part that is most common in pipeline engineering. The flanges are used in pairs. In pipeline engineering, flanges are mainly used for the connection of pipelines. In the pipes that need to be connected, all kinds of flanges are mounted, low-pressure pipes can be used with wire flanges, and welding flanges with a pressure of more than 4 kg are used. Low-pressure and small-diameter wire-reinforced flanges, high-pressure and low-pressure large-diameter welding flanges are used, and the flanges of different pressures have different thicknesses and diameters and numbers of connecting bolts. Stainless steel flanges do not produce corrosion, pitting, rust, or wear. They are one of the highest strength materials in architectural metal materials. Because stainless steel has good corrosion resistance, it can make structural components permanently maintain the integrity of the engineering design.
Flange can not be stored for a long time, should be checked on schedule, often exposed surface should be kept clean, remove dirt, cleanly stored in a room where the air is dry, it is strictly prohibited stacking or open storage. Flange ball valves, globe valves, and gate valves are used only when they are fully open or fully closed. They are not allowed to adjust the flow rate to avoid erosion of the sealing surface and accelerated wear. Flange is easy to use, simple to manufacture, low in cost, and widely used. However, its rigidity is poor. Therefore, it cannot be used in chemical process piping systems with high demand and flammability, high explosiveness and high vacuum degree, and highly hazardous places. The sealing surface type has flat and protruding surfaces. Flange structure is simple, small size, light weight; close and reliable, the current ball valve sealing surface materials are widely used plastic, sealing is good, has also been widely used in the vacuum system; easy maintenance, ball valve structure is simple, the seal ring is generally active The removal and replacement are more convenient; when fully open or fully closed, the sealing surfaces of the ball body and the valve seat are isolated from the medium.