Wenzhou Jingwei Seal Technology Co., Ltd.
Wenzhou Jingwei Seals Technology Co., Ltd.
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Surface finish of the Style R Ring Type Joint sealing faces (radiused ends of an Oval and the 23° angled faces of an Octagonal shape) shall not be greater than 1.6 μm Ra /63 μin RMS. Flexitallic Style R Ring Type Joints can bemanufactured in accordance with all relevant standardsto suit the following flange designations:
API 6A
ASME16.20
R Oval & Octagonal gasket ring Can be used for ASME B16.5 flange class 150 to 2500 and
API 6B to Class 5000
»Soft iron and carbon steel gaskets are zinc plated to prevent
corrosion
» All rings are marked with the ring number, material and the
date of manufacture and API designation.
| Common Materials | |||
| Material | Brinell Hardness | Temperature Limitations | Identification |
| Soft Iron | 90 | -60 to +400 °C | D |
| Low carbon steel | 120 | -40 to +500°C | S |
| 4%-6% Cr ½% Mo:F5 | 130 | -125 to +500°C | F5 |
| Stainless steel 304/304L | 160 | -250 to +650°C | S304 or 304L |
| Stainless steel 316/316L | 160 | -196 to +800°C | S316 or 316L |
| Stainless steel 321 | 160 | -250 to +870°C | S321 |
| Stainless steel 347 | 160 | -250 to +870°C | S347 |
| Stainless steel 410 | 170 | -20 to +500°C | S410 |
| Inconel 625 | – | 1000°C | 625 |
| Incoloy 825 | – | 1000°C | 825 |
| Hastelloy C-276 | – | 1000°C | C-276 |
| Duplex | – | 800°C | S31803 |
| Titanium | – | 540°C | TI |