Octagonal gasket seal refers to a flange seal with an octagonal cross-section metal ring as the sealing element, which is a forced seal. The octagonal gasket is placed in the trapezoidal groove of two connecting flanges, and the oblique angle of the gasket and groove section is 23 °. The octagonal gasket material is made of pure iron, low-carbon steel, stainless steel, etc., and the gasket material is required to have a hardness HB30~HB40 lower than the flange groove material.
This type of seal is a forced seal, named after its cross-section and angular shape. The structure is shown in the figure. The octagonal gasket is placed in the sealing groove at the end cover and the end of the cylinder, and the oblique angle of the sealing groove is 23 ‘, which is the same as the oblique angle of the octagonal gasket. When the connecting bolts are tightened, a forced seal is formed, mainly used for small diameter containers and high-pressure pipelines. In the petroleum industry, the “steel pressure vessel” with its structural size series is widely used.
There are many types of RTJ gaskets, including R Gasket,RX Gasket,BX Gasket, SBX Gasket,IX Gasket,and various customized products.We will do more sharing about ring joint gasket.