Description
| Carbon Steel: | Gasket | Stainless Steel: | Seal |
| Metal: | Seals Ring | Soft Iron: | Gasket |
Temperature: -200～800（℃）
Standard: APi 6a
Delivery: In Stock
Pressure: High Pressure
High Light: API 6A RTJ Ring Joint Gasket, R67 seal ring gasket, R67 ring type flange
API Ring Joint Gaskets manufacturer High Pressure
Metallic ring type joint gaskets are heavy duty, high-pressure gaskets largely used in offshore and onshore 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 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.
Worn, pitted or corroded flange sealing surfaces can impede the sealing ability of RTJ gaskets. In such instances, a serrated octagonal RTJ gasket, covered with flexible graphite, can provide a temporary or emergency solution until the flange can be repaired or replaced.
The Ring Type Joint Gasket is initially developed for high pressure/ temperature applications found in the petroleum industry and is primarily used in the oilfield on drilling and completion equipment.
However, today this product range can also be found on valves and pipe work assemblies, along with some high integrity pressure vessel joints.
| Gasket type | Ring joint gasket standard | Flange standard |
| Oval | ASME B 16.20 API 6A | ANSI B 16.5 ASME B16.47, SERIES A |
| Octagonal | ASME B 16.20 API 6A | ANSI B 16.5 ASME B16.47, SERIES A |
| RX | ASME B 16.20 API 6A | API 6 B |
| BX | API 6A | API 6 B |
Primary features:
1. Resistance to high temperature and pressure, suitable for high pressure flange
2. Excellent temperature resistance. Permanent temperature range -200℃to +550℃
3. Very high operating pressure limits (320 bar)
4. Good chemical resistance
5. High-grade, reinforced and blow out safe gasket as per UW (Healty and safety at Work Act), high operating safe
6. Very low leakage rate, meets TA-LUFT requirement
7. No ageing, no embitterment, even at high temperature
8. Asbestos-free, physiologically harmless, disposal with domestic waste
9. Good handling during transport, installation and removal. Mechanically stable, scratch-resistant
Related products:
ASME B16.20 Ring Joint Gaskets, API 6A Ring Joint Gaskets, API 17D Ring Joint Gaskets, Non-standard Ring Joint Gaskets
We can offer more than 30 kinds of materials, such as 321SS, 347SS, 316SS, 304SS, Inconel 625, Monel 400, INCOLY 825, Nickel 200, Duplex F44, soft iron, low carbon steel and so on. We have over 10 years experience in export business. Our products are sold to Southeast Asia, Middle East, Europe and America and well appreciated by our clients.
As a result of metal to metal sealing media they are made to be free of indentations, tool marks etc and have a surface finish of maximum,
· R, RX – 63 microinches Ra (1.6 micrometer Ra).
Thus Gasket supplies ring joint gaskets (RTJ Gasket) with the hardness numbers as follows:
|
GASKET MATERIALS |
BRINELL HARDNESS NUMBER (max) |
ROCKWELL HARDNESS NUMBER (max) |
IDENTIFICATION |
|---|---|---|---|
| Soft iron | 90 | 56 | D |
| Low carbon steel | 120 | 68 | S |
| 4-6% Chrome 1/2% molybdenum | 130 | 72 | F5 |
| 304 Stainless Steel | 160 | 83 | S304 |
| 316 Stainless Steel | 160 | 83 | S316 |
| 347 Stainless Steel | 160 | 83 | S347 |
| Material | Identification | Material No. | Hardness | Temperature (oC) | |
| Min | Max. | ||||
| Soft Iron | D | – | 90 | -40 | 500 |
| Low Carbon Steel | S | – | 120 | -40 | 500 |
| Stainless Steel 304 | 304SS | 1.4301 | 160 | -250 | 550 |
| Stainless Steel 304L | 304L SS | 1.4306 | 160 | -250 | 550 |
| Stainless Steel 316 | 316SS | 1.4401 | 160 | -100 | 550 |
| Stainless Steel 316L | 316L SS | 1.4404 | 160 | -100 | 550 |
| Stainless Steel 321 | 321SS | 1.4541 | 160 | -250 | 550 |
| Stainless Steel 347 | 347SS | 1.445 | 160 | -250 | 500 |
| Stainless Steel 410 | 410SS | 1.4 | 170 | -20 | 850 |
| Aluminum | Al | 3.0255 | 30 | -250 | 300 |
| Copper | Cu | 2.009 | ca.80 | -250 | 400 |
| Brass | CuZn37 | 2.0321 | ca.60 | -100 | 350 |
| Nickel 200 | Ni200 | 2.4066 | 110 | -250 | 600 |
| Monel 400 | 400 | 2.436 | 150 | -125 | 600 |
| Inconel 600 | 600 | 2.4816 | 150 | -100 | 950 |
| Hastelloy B2 | B2 | 2.4617 | 230 | -200 | 450 |
| Titanium | Ti | 3.7025 | ca.215 | -250 | 350 |
Marking and Identification (standard):
The outer surface of each Ring Type Joint should show the manufacturer’s name or a trademark, the gasket number like R67, RX37 or BX155, gasket’s material in abbreviation(check below our chart), as well as the standards like ASME B16.20, API 6A, API 17D, etc.
Materials
RTJ gaskets are available as standard in soft metal and in 304, 316 and stainless steels. Versions in other materials on request.
Standards and approvals
All RTJ gaskets are manufactured to API standards, guaranteeing consistent quality.
Recommended applications
Industries
- Oil & gas industry
- Petrochemical industry
- Flange connections
- Pipe connections
Functional description
Under axial compressive load, ring type joints plastically deform and flow into the irregularities of the flange groove. Since the contact area of the ring type joint is relatively small, a very high compressive load results between the sealing surface of the ring type joint and the flange groove. This surface pressure is further increased especially by the RX and BX RTJ variants. Both variants are able to seal extremely high internal pressures. RTJ gaskets are produced from metal, so they remain in their compressed form, even when the surface pressure is relaxed. The sealing function of the RTJ gasket is reinforced by the axial forces acting on the sealing surfaces.
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