China Manufacturer of Oval Ring Type Joint Gasket ASME B16.20
Ring Joint gaskets are available in octagonal or oval .Ring gaskets are widely used in Refineries, Petrochemical Industries, drilling well head equipment, Pressure Vessels, valves, Christmas Tree valves and Pipe lines. Our ring joint gaskets are strictly manufactured as per API-6A and ASME B16.20 specification.
Oval ring-joint gasket
Oval Ring gasket is manufactured in an oval-shaped section. The oval ring fits the round and flat bottom ring groove flange
The original ring joint design can be used on standard flat bottomed groove flanges and older round bottomed groove flanges 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.
RTJ gaskets dimension and weight list
Pls check and download the RTJ gaskets dimension and weight list
RTJ Gasket Material selection
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 less than the flange material to ensure sufficient deformation of the gasket without damaging the flange facing. Some common materials are listed in the table below.
| MATERIAL | HARDNESS BRINELL | TEMP. RANGE | MARKING |
| Soft Iron | 90 | -60 to 500°C | D |
| Low Carbon Steel | 120 | -40 to 500°C | S |
| 4-6% Cr ½% Mo | 130 | -125 to 500°C | F5 |
| 304 | 160 | -250 to 650°C | S304 |
| 316 | 160 | -196 to 800°C | S316 |
| 321 | 160 | -250 to 870°C | S321 |
| 347 | 160 | -250 to 870°C | S347 |
| 410 | 170 | -20 to 500°C | S410 |
| Monel (N04400) | 135 | 400°C | N04400 |
| UNS N08904 | 180 | 400°C | 904L |
| Inconel 625 | 200 | +1000°C | 625 |
| Incoloy 825 | 160 | +1000°C | 825 |
| Hastelloy C-276 | 200 | +1000°C | C-276 |
| Titanium | 160 | +540°C | TI |
Applications of Oval Ring-Joint Gaskets
Oil & Gas Pipelines – Wellhead assemblies, Christmas trees, subsea connections
Refineries & Petrochemicals – Heat exchangers, pressure vessels, reactors
Power Plants – High-pressure steam, turbines, and boilers
Aerospace & Defense – Jet engines and high-temperature exhaust systems
Nuclear Industry – Radiation shielding & reactor coolant piping
