Metal ring pad classification
The metal ring pad is divided into an octagonal ring pad and an elliptical pad. The metal annular gasket is divided into an octagonal shape and an elliptical shape according to the sectional shape.As shown：
The octagonal ring pad is matched with the flange groove and is mainly used for surface contact. Compared with the elliptical ring pad, although it is not easy to be in close contact with the flange groove, it can be used again, and since the cross section is composed of a straight line, it is easy to process. The elliptical ring gasket is in line contact in the flange groove, and has good sealing performance, but the processing precision is high, thereby increasing the manufacturing cost, and the elliptical ring pad cannot be reused.