Metal gaskets can be made from a single metal or a combination of metal materials, in a variety of shapes and sizes.
They are suitable for high temperature and pressure applications.
Metallic Gaskets
Properties and applications
The most common metal gaskets
The most common are the following:
- flat solids;
- solid with round section;
- ring joint type R (oval and octagonal section), BX and RX;
- lenticular;
- double cone;
- delta.
Ring joint
- Initially developed for high pressure and high temperature applications; for applications in the oil industry.
- Today this product range they are also found on valves and piping for high pressure joint integrity.
- Standard R-type ring couplings are manufactured in accordance with both API 6A and ASME B16.20.
- Available in both oval and octagonal configurations.
Standard materials according to ASME B16.20
| ASTM | EN Material No. |
|---|---|
| Soft Iron | 1.1003 |
| Low carbon steel | 1.0038 |
| 4-6 chrome ½ Mo | 1.7362 (AISI 501) |
| AISI 410 | 1.4000 |
| AISI 304 | 1.4301 |
| AISI 316 | 1.4401 |
| AISI 347 | 1.4550 |
Max HB "Brinell"
Max HRB "Rockwell B"
| 90 | 120 | 56 | 68 | D | S |
| 130 | 72 | F5 |
| 170 | 86 | S410 |
| 160 | 83 | S304 |
| 160 | 83 | S316 |
| 160 | 83 | S347 |
Regulations for ring joint and flanges
| Ring Joint type | Regulations ring joint | Regulations flanges |
|---|---|---|
| R | ASME B16.20, API 6A | ASME B16.5, ASME B16.47 API 6B |
| BX | API 6A | ASME B16.5, ASME B16.47 API 6B |
| RX | ASME B16.20, API 6A | API 6BX |
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