China Manufacturer of Inconel 625 Oval Ring Type Joint Gasket N06625
Ring Joint gaskets are available in octagonal or oval cross-section. Our API Ring Joint Gaskets are used in applications up to 10,000 psi. Where new flanges are to be used, we recommend the higher efficiency octagonal cross-section gaskets. Oval cross-section gaskets are still a very effective gasket solution where the application requires sealing on existing flanges with round bottom grooves.
Types of Inconel 625 Ring Gaskets
R Type Ring Gasket – Standard oval and octagonal RTJ gaskets for ASME B16.5 and API 6A flanges.
BX Type Ring Gasket – High-pressure gasket for API 6BX flanges, used in oil & gas pipelines.
RX Type Ring Gasket – Self-sealing, pressure-energized gasket for API 6B flanges, ideal for offshore drilling.
Oval ring-joint gasket
The Type BX ring-joint gasket is manufactured with a diameter slightly larger than that of the mating ring grooves, which allows radial interference to exist. The OD sealing angle of Type BX ring gaskets is considered to be the primary seal since both radial and axial loads are applied to the OD sealing angles causing the sealing force on the OD sealing angles to be substantially greater than the sealing force on the ID sealing angles. Type BX ring-joint gaskets are designed to be pressure-energized, and do allow face-to-face contact of the flanges or hubs. Axial through-holes are drilled in each BX ring-joint gasket to ensure pressue equalization between each face of the ring-joint gasket and the mating ring grooves.
Dimensions for API ring joint gaskets
Dimensions for API ring joint gaskets and grooves are covered in ANSI B16.20 and API6A.
We stock a wide range of sizes: API Ring Joint Gasket BX Ring Gasket
| API Ring Number | Nominal Flange Bore, Inches | |||
| 5000 psi | 10,000 psi | 15,000 psi | 20,000 psi | |
| BX 150 | 1-11/16 | 1-11/16 | ||
| BX 151 | 1-13/16 | 1-13/16 | 1-13/16 | |
| BX 152 | 2-1/16 | 2-1/16 | 2-1/16 | |
| BX 153 | 2-9/16 | 2-9/16 | 2-9/16 | |
| BX 154 | 3-1/16 | 3-1/16 | 3-1/16 | |
| BX 155 | 4-1/16 | 4-1/16 | 4-1/16 | |
| BX 156 | 7-1/16 | 7-1/16 | 7-1/16 | |
| BX 157 | 9 | 9 | ||
| BX 158 | 11 | 11 | ||
| BX 159 | 13-5/8 | |||
| BX 160 | 13-5/8 | |||
| BX 161 | 16-3/4 | |||
| BX 162 | 16-3/4 | 16-3/4 | ||
| BX 163 | 18-3/4 | |||
| BX 164 | 18-3/4 | |||
| BX 165 | 21-1/4 | |||
| BX 166 | 21-1/4 | |||
| BX 167 | 26-3/4; 2000 & 3000 psi | |||
| BX 168 | ||||
| RTJ standard size gaskets are manufactured in accordance with API-6A and ANSI B16.2 specifications and are furnished in stock materials including soft iron, low carbon steel, 4-6 chrome (F5), 304 & 304L, 316 & 316L, 347, 410, Monel, Inconel and Incoloy. |
Dimensions and Weights of Type BX Ring joint gasket for use with API 6A Type 6BX flanges.
All dimensions are in mm and weights are in kg. The pipe size is the Nominal Pipe Size (NPS).
| Nominal Size (NPS) |
API Class | API 6A (psi) 2000 |
API 6A (psi) 3000 |
API 6A (psi) 5000 |
API 6A (psi) 10000 |
API 6A (psi) 15000 |
API 6A (psi) 20000 |
Ring No. | OD of Ring OD |
Height of Ring H |
Width of Ring A |
Width of Flat C |
OD of Flat OTD |
Hole Size D |
Radius on Ring R1 (min) |
Radius on Ring R1 (max) |
Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1-11/16” | 10000, 15000 | – | – | – | 1-11/16″ | 1-11/16″ | – | BX 150 | 72.19 | 9.3 | 9.3 | 7.98 | 70.87 | 1.6 | 0.13 | ||
| 1-13/16” | 10000, 15000, 20000 | – | – | – | 1-13/16″ | 1-13/16″ | 1-13/16″ | BX 151 | 76.40 | 9.63 | 9.63 | 8.26 | 75.03 | 1.6 | 0.8 | 1.2 | 0.15 |
| 2-1/16” | 10000, 15000, 20000 | – | – | – | 2-1/16″ | 2-1/16″ | 2-1/16″ | BX 152 | 84.68 | 10.24 | 10.24 | 8.79 | 83.24 | 1.6 | 0.8 | 1.2 | 0.19 |
| 2-9/16” | 10000, 15000, 20000 | – | – | – | 2-9/16″ | 2-9/16″ | 2-9/16″ | BX 153 | 100.94 | 11.38 | 11.38 | 9.78 | 99.31 | 1.6 | 0.9 | 1.4 | 0.29 |
| 3-1/16” | 10000, 15000, 20000 | – | – | – | 3-1/16″ | 3-1/16″ | 3-1/16″ | BX 154 | 116.84 | 12.40 | 12.40 | 10.64 | 115.09 | 1.6 | 1.0 | 1.5 | 0.40 |
| 4-1/16” | 10000, 15000, 20000 | – | – | – | 4-1/16″ | 4-1/16″ | 4-1/16″ | BX 155 | 147.96 | 14.22 | 14.22 | 12.22 | 145.95 | 1.6 | 1.1 | 1.7 | 0.56 |
| 7-1/16” | 10000, 15000, 20000 | – | – | – | 7-1/16″ | 7-1/16″ | 7-1/16″ | BX 156 | 237.92 | 18.62 | 18.62 | 15.98 | 235.28 | 3.2 | 1.5 | 2.2 | 1.88 |
| 9” | 10000, 15000 | – | – | – | 9″ | 9″ | 9″ | BX 157 | 294.46 | 20.98 | 20.98 | 18.01 | 291.49 | 3.2 | 1.7 | 2.5 | 2.98 |
| 11” | 10000, 15000 | – | – | – | 11″ | 11″ | 11″ | BX 158 | 352.04 | 23.14 | 23.14 | 19.86 | 348.77 | 3.2 | 1.9 | 2.8 | 4.36 |
| 13-5/8” | 10000 | – | – | – | 13-5/8″ | 13-5/8″ | 13-5/8″ | BX 159 | 426.72 | 25.70 | 25.70 | 22.07 | 423.09 | 3.2 | 2.1 | 3.1 | 6.55 |
| 13-5/8” | 5000 | – | – | 13-5/8″ | – | – | – | BX 160 | 402.59 | 23.83 | 13.74 | 10.36 | 399.21 | 3.2 | 1.9 | 2.9 | 3.07 |
| 16-5/8” | 5000 | – | – | 16-3/4″ | – | – | – | BX 161 | 491.41 | 28.07 | 16.21 | 12.24 | 487.45 | 3.2 | 2.2 | 3.4 | 5.35 |
| 16-5/8” | 5000, 10000 | – | – | 16-3/4″ | 16-3/4″ | – | – | BX 162 | 475.49 | 14.22 | 14.22 | 12.22 | 473.48 | 1.6 | 1.1 | 1.7 | 1.99 |
| 18-¾” | 5000 | – | – | 18-3/4″ | – | – | – | BX 163 | 556.16 | 30.10 | 17.37 | 13.11 | 551.89 | 3.2 | 2.4 | 3.6 | 6.53 |
| 18-¾” | 100000 | – | – | – | 18-3/4″ | 18-3/4″ | – | BX 164 | 570.56 | 30.10 | 24.59 | 20.32 | 566.29 | 3.2 | 2.4 | 3.6 | 9.55 |
| 21-¼” | 5000 | – | – | 21-1/4″ | – | – | – | BX 165 | 624.71 | 32.03 | 18.49 | 13.97 | 620.19 | 3.2 | 2.6 | 3.8 | 8.76 |
| 21-¼” | 10000 | – | – | – | 21-1/4″ | – | – | BX 166 | 640.03 | 32.03 | 26.14 | 21.62 | 635.51 | 3.2 | 2.6 | 3.8 | 12.82 |
| 26-¾” | 2000 | 26-3/4″ | – | – | – | – | – | BX 167 | 759.36 | 35.87 | 13.11 | 8.03 | 754.28 | 1.6 | 2.9 | 4.3 | 8.53 |
| 26-¾” | 3000 | – | 26-3/4″ | – | – | – | – | BX 168 | 765.25 | 35.87 | 16.05 | 10.97 | 760.17 | 1.6 | 2.9 | 4.3 | 11.14 |
| 5-1/8” | 10000 | – | – | – | 5-1/8″ | – | – | BX 169 | 173.51 | 15.85 | 12.93 | 10.69 | 171.27 | 1.6 | 1.3 | 1.9 | 0.73 |
| 6-5/8” | 10000, 15000 | – | – | – | 6-5/8″ | 6-5/8″ | – | BX 170 | 218.03 | 14.22 | 14.22 | 12.22 | 216.03 | 1.6 | 1.1 | 1.7 | 1.03 |
| 8-9/16” | 10000, 15000 | – | – | – | 8-9/16″ | 8-9/16″ | – | BX 171 | 267.44 | 14.22 | 14.22 | 12.22 | 265.43 | 1.6 | 1.1 | 1.7 | 1.24 |
| 11-5/32” | 10000, 15000 | – | – | – | 11-5/32″ | 11-5/32″ | – | BX 172 | 333.07 | 14.22 | 14.22 | 12.22 | 331.06 | 1.6 | 1.1 | 1.7 | 1.56 |
| 30” | 2000, 3000 | 30″ | 30″ | – | – | – | – | BX 303 | 852.75 | 37.95 | 16.97 | 11.61 | 847.37 | 1.6 | 3.0 | 4.6 | – |
Tolerances
Outside Diameter: +0mm, -0.15mm
Height of Ring (H): +0.20mm, -0mm
Width of Ring (A): +0.20mm, -0mm
Width of Flat (C): +0.15mm, -0mm
OD of Flat (OTD): +0.50mm, -0.50mm
Hole Size (D): +0.50mm, -0.50mm
Radius on Ring (R1): +0.50mm, -0.50mm
Inconel 625 Ring gasket
What is an Inconel 625 Ring Gasket?
An Inconel 625 Ring Gasket is a precision-engineered metallic gasket made from UNS N06625 (Inconel 625), a nickel-chromium-molybdenum alloy known for its superior oxidation resistance, exceptional mechanical strength, and outstanding corrosion resistance. These gaskets are commonly used in RTJ (Ring-Type Joint) flanges, ensuring a secure and durable seal in extreme conditions.
INCONEL 625 is a nickel-chromium-molybdenum- niobium grade material offering outstanding corrosion resistance and superb weldability. The addition of niobium provides high strength without the need for heat treatment.
Chemical Composition of Inconel 625 (%) N06625
| UNS | Grade | Ni ≤ | C ≤ | Cr | Fe ≤ | Mn ≤ | S ≤ | Si ≤ | Ti ≤ |
| N06625 | 625 | 58 | 0.1 | 20 – 23 | 5 | 0.5 | 0.015 | 0.5 | 0.4 |
RTJ Ring Joint Gaskets as per API 6A and ASME B16.5-inconel 625 order specification：
- Material: Inconel 625,N06625
- Size: 13-5/8″
- Class#: 10000
- Shape: Octagonal
- Ring Number: BX159 RTJ
Technical Specifications of Inconel 625 Ring Gasket
| Property | Value |
|---|---|
| Material Grade | ASTM B564 UNS N06625 (Inconel 625) |
| Hardness | ≤ 250 HB |
| Tensile Strength | ≥ 827 MPa (120,000 psi) |
| Yield Strength | ≥ 414 MPa (60,000 psi) |
| Elongation | ≥ 30% |
| Melting Point | 1290 – 1350°C (2350 – 2460°F) |
| Density | 8.44 g/cm³ |
| Temperature Range | -196°C to 980°C (-320°F to 1800°F) |
| Pressure Rating | Up to 20,000 PSI (varies by size) |
Looking for a high-strength, corrosion-resistant sealing solution? The Inconel 625 Ring Gasket is engineered to provide exceptional performance in high-pressure, high-temperature, and corrosive environments. Made from Nickel-based Inconel 625 alloy, this gasket ensures leak-proof sealing in oil & gas, chemical processing, aerospace, and marine applications.
