ASME B16.20 OVAL Metal Washer

Dinfn Metallic Ring Type Joint gaskets are heavy duty, high-presure gaskets largely used in offshore petrochemical applications.

They are precision-engineered components designed to be used in conjunction with precision-machined flanges.

All our Ring Joints are manufactured according to ASME B16.20 and API 6a.

The gasket material is selected on a number of grounds primarily; chemical compatibility with the media and the hardness of the flange.

The gasket material ideally needs to be roughly 30 Brinell less than the flange material to ensure sufficient deformation of the gasket without damaging the flange facing.

Type	Cross Section	Standard of Ring Joint Gasket	Standard of Flange
Oval		ASME B 16.20 API 6A	ANSI B 16.5 ASME B16.47,series A
Octagonal		ASME B 16.20 API 6A	ANSI B 16.5 ASME B16.47,series A
RX		ASME B 16.20 API 6A	API 6B
BX		API 6A	API 6BX

Material	Maximum Hardness (HB)	T(℃)
Soft Iron	90	530
Low Carbon Steel	120	530
5Cr1/2Mo f5	130	500
SS304	160	750
SS316	160	750
SS321	160	750
SS347	160	750
SS410	130	500
31254 F44	230	650
Inconel 825	160	1000
Inconel 625	200	1100

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Product Categories : Ring Type Gasket > R-Oval - Ring Gasket