Metallic Gaskets
Metallic Ring Joint gaskets are heavy duty, high-pressure 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.
The gasket material is selected on a number of grounds primarily; chemical compatability 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.
Please do not hesitate to contact our technical sales team who will be delighted to assist you in finding the ideal gasket for your specific application.
A number of Ring Joint styles are available designed for specific flange types. Please view the tables below for further infromation.
| Type |
Nominal Pipe Size |
Class Ratings |
| Type R Oval and Octagonal |
½ " to 24" |
150 to 2500 ASME B16.20 |
|
26" to 36" |
300 to 900 ASME B16.20 Series A |
|
API 6A |
API 6A |
| Type RX |
1½ " to 24" |
720 to 5000 ASME B16.20 |
|
26" to 36" |
300 to 900 ASME B16.20 Series A |
| Type |
1½ " to 20" |
API 6A |
| Type BX |
1 11/16 " to 21¼ " |
5000 to 20000 ASME B16.20 |
| Material |
Brinell Hardness |
Temperature Limitation |
| Soft Iron |
90 |
-60ºC to 500ºC |
| Low Carbon Steel |
120 |
-40ºC to 500ºC |
| 4-6% Chrome; 1/2% Molyb |
130 |
-125ºC to 500ºC |
| Stainless 304 |
160 |
-250ºC to 500ºC |
| Stainless 316 |
160 |
-110ºC to 550ºC |
| Stainless 321 |
160 |
-250ºC to 550ºC |
| Stainless 410 |
170 |
-20ºC to 500ºC |
| Incoloy 625 |
|
450ºC |
| Incoloy 825 |
|
450ºC |
| Hastelloy C-276 |
|
450ºC |
| Titanium |
|
450ºC |
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