DESCRIPTION
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 ring joints are manufactured 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.
STOCK
We have select sizes in stock.
ALL PRESSURES AND TEMPERATURES ARE SUBJECT TO INDIVIDUAL APPLICATION
CONSTRUCTIONS OF RTJ’S
|
TYPE |
NOMINAL PIPE SIZE |
CLASS RATINGS |
|---|---|---|
| Type R Oval & Octagonal | ½” to 24” | 150 to 2500 ASME B16.20 |
| 26” to 36” | 300 to 900 ASME B16.20 A | |
| 1½” to 20” | API 6A | |
| Type RX | 1½” to 24” | 720 to 5000 ASME B16.20 |
| 26” to 36” | 300 to 900 ASME B16.20 A | |
| 1½” to 20” | API 6A | |
| Type BX | 1.11/16” to 21¼” | 5000 to 20000 ASME B16.20 |
|
MATERIAL |
BRINELL HARDNESS |
TEMPERATURE LIMITATION |
IDENTIFICATION |
|---|---|---|---|
| Soft Iron | 90 | -60°C to +500°C | D |
| Low Carbon Steel | 120 | -40°C to +500°C | S |
| 4-6% CR ½”% Mo | 130 | -250°C to +500°C | F5 |
| 304 Stainless Steel | 160 | -250°C to +550°C | S304 |
| 316L Stainless Steel | 160 | -110°C to +550°C | S316 |
| 321 Stainless Steel | 160 | -250°C to +550°C | S321 |
| 347 Stainless Stee | 160 | -250°C to +550°C | S347 |
| 410 | 170 | -20°C to +500°C | S410 |
| Monel (N04400) | 135 | +450°C | N04400 |
| UNS N08904 | 135 | +450°C | 904L |
| Inconel 625 | – | +450°C | 625 |
| Incoloy 825 | – | +450°C | 825 |
| Hastelloy C-276 | – | +450°C | C-276 |
| Titanium | – | +450°C | TI |