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-:: SOLID RING JOINT GASKETS ::-

API ring joint gaskets come in two basic types, an oval cross section and an octagonal cross section. These basic shapes are used in pressure up to 10,000 psi. The octagonal cross section has a higher sealing efficiency than the oval and would be the preferred gasket. The sealing surface on the ring joint grooves must be smoothly finished to 63 microinches and would be free of objectionable ridges, tool or machining marks. They seal by an initial line contact or a wedging action as the compressive forces are applied. The hardness of the ring should always be less than the hardness of the flanges. Dimensions of API ring joint gaskets and grooves are covered in ANSI B16. 20 and API 6A.

We have a wide range of sizes and materials ready for immediate dispatch from R11 to R70.

The BX ring gaskets differs from the standard oval or octagonal shape in that it is square in cross section and tappers in each corner. They can only be used in API 6BX flanges . RX ring gaskets are similar in shape to the standard octagonal ring joint gasket but their cross section is designed to take advantage of the contained fluid pressure in effecting a seal. They are both made to API 6A and interchangeable with standard octagonal rings for oil field drilling and production applications in API 6B flanges. RX and BX gaskets are used at pressure up to 15,000 psi.


A lens type gasket is a line contact seal for use in high pressure piping systems and in pressure vessel heads. The lens cross section is a spherical gasket surface and require special machining on the flanges. This gaskets will seat with a small bolt load since the contact area is very small and gasket seating pressure are very high. In ordering lens gaskets, complete drawing and material specifications must be supplied.


A delta gasket is a pressure actuated gasket used primarily on pressure vessels and valve bonnets at very high pressure in excess of 5000 psi. As with the lens gasket, complete drawing and material specifications must be supplied. Internal pressure forces the gasket material to expand when the pressure forces tend to separate the flanges. Extremely smooth surface finishes of 63 microinches or smoother are required when using this type of gaskets.

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