BX Ring Joint Gasket
Model:KXT 830
> BX Ring Joint Gasket to the octagonal ring joint > BX series can only be used with 6BX flanges > BX rings for higher pressure rating starting at 5,000 lbs, and ending with 20,000 lbs. > Rings can not be re-used.
KXT 830 BX Ring Joint Gasket is a high‑pressure, pressure‑energised metal gasket designed exclusively for API 6BX flanges. With pressure ratings from 5,000 to 20,000 psi, these octagonal‑style rings deliver reliable sealing in critical oil & gas, wellhead, and subsea applications. Manufactured from a wide range of materials (soft iron, stainless steel, Inconel, Monel, etc.) to match flange hardness requirements. Single‑use only – never re‑use. Request a quote →
KXT 830 BX Ring Joint Gasket – High‑Pressure Seal for API 6BX Flanges
The KXT 830 BX Ring Joint Gasket is a precision‑engineered metal sealing ring designed specifically for API 6BX flange connections. Unlike R and RX styles, BX rings are pressure‑energised – internal pressure forces the ring outward against the groove walls, creating a self‑tightening seal that becomes more effective as pressure increases. This design makes BX gaskets the preferred choice for high‑pressure wellhead equipment, Christmas trees, and manifold systems operating between 5,000 and 20,000 psi.
Manufactured to strict tolerances, our BX rings are available in a comprehensive range of materials – from soft iron to exotic alloys – ensuring compatibility with flange hardness (typically 15‑20 HB lower than the flange). Important: BX ring gaskets are designed for single use only and must never be re‑used after removal. Contact our engineering team for material selection and sizing assistance.
Key Features of KXT 830 BX Ring Joint Gaskets
- ✅ Pressure‑Energised Seal – Internal pressure activates the seal, increasing tightness with higher pressure.
- ✅ Exclusively for API 6BX Flanges – Designed for compact, high‑pressure flange connections.
- ✅ High Pressure Rating – Suitable for 5,000 psi to 20,000 psi service (and higher on request).
- ✅ Wide Material Selection – Soft iron, low carbon steel, 304/316/321/347 SS, 410 SS, 5Cr‑0.5Mo, copper, aluminium, Inconel, Incoloy, Monel, Hastelloy, titanium, nickel and more.
- ✅ Precision Machined – Tight tolerances ensure proper fit and reliable sealing.
- ✅ Single‑Use Only – Designed for one‑time installation; re‑use risks leakage.
BX Ring Joint Gasket – Octagonal cross‑section drawing
Technical Specifications – KXT 830 BX Ring Joint Gasket
| Property | Value |
|---|---|
| Type | BX (API 6BX) Octagonal Ring Joint |
| Pressure Rating | 5,000 – 20,000 psi (higher on request) |
| Flange Standard | API 6BX (also ANSI B16.5, JPI, GB, HG, JB) |
| Sealing Principle | Pressure‑energised (radial self‑tightening) |
| Re‑usability | Not reusable (single‑use only) |
| Cross‑section | Octagonal (BX profile) |
| Applicable Standards | ANSI B16.5, API 6A, JPI‑75‑15‑70, GB 699, GB 1220, JB 755, HG 20633‑97 |
* For exact dimensions (size, pitch, height), refer to API 6A or contact our technical team.
Material Parameters & Temperature Limits
Choose the right material based on flange hardness and operating environment. The gasket hardness should be 15‑20 HB lower than the flange face.
| Material | Max. Hardness (HB) | Temperature Range (°C) | Marking |
|---|---|---|---|
| Soft Iron | 90 | -60 to 500 | D |
| Low Carbon Steel | 120 | -40 to 540 | S |
| 304 SS | 160 | -250 to 540 | 304 |
| 304L SS | 160 | -250 to 540 | 304L |
| 316 SS | 160 | -200 to 815 | 316 |
| 316L SS | 160 | -200 to 815 | 316 |
| 321 SS | 160 | -200 to 870 | 321 |
| 347 SS | 160 | -200 to 870 | 347 |
| 410 SS | 170 | -40 to 850 | 410 |
| 5Cr‑0.5Mo | 130 | -29 to 650 | — |
| Copper | 80 | -100 to 315 | — |
| Aluminium | 35 | -200 to 425 | — |
| Inconel 600 | 150 | -100 to 1095 | — |
| Incoloy 825 | 150 | -100 to 1095 | — |
| Monel 400 | 150 | -100 to 760 | — |
| Titanium | 215 | -200 to 540 | — |
| Nickel 200 | 110 | 200 to 760 | — |
| Hastelloy B2 | 230 | -100 to 1095 | — |
| Hastelloy C276 | 210 | -100 to 1095 | — |
* Other alloys and custom hardness grades available. Contact us for material compatibility.
Typical Applications
Oil & Gas Wellhead Christmas trees, casing heads, and tubing spools.
Subsea Equipment Subsea manifolds, connectors, and ROV‑operated systems.
High‑Pressure Piping Choke and kill lines, flow lines, and injection systems.
Valves & Fittings API 6A gate valves, check valves, and flanged fittings.
Refinery & Petrochemical High‑pressure process connections in severe service.
Power Generation Steam and high‑temperature gas systems.
Why Choose Kaxite for BX Ring Joint Gaskets?
API 6A Compliance – Our BX rings are manufactured to API 6A and ANSI B16.5 standards, ensuring interchangeability.
Full Material Traceability – All raw materials come with mill test reports (MTRs) and are traceable to heat numbers.
Custom Alloys & Dimensions – We can source special alloys and machine non‑standard sizes on request.
Hardness Control – We strictly control hardness to ensure it is 15‑20 HB lower than mating flange.
Global Supply – Reliable delivery to oilfields, refineries, and offshore installations worldwide.
24/7 Technical Support – Our team of sealing engineers is available to assist with selection and troubleshooting.
Trusted by Operators Worldwide: Kaxite’s ring joint gaskets are field‑proven in the most demanding high‑pressure environments, from the North Sea to the Middle East.
Quality Assurance & Custom Manufacturing
All KXT 830 BX gaskets are produced in our ISO 9001:2015 facility. Each ring undergoes dimensional inspection, hardness verification, and surface finish checks. We can provide EN 10204 3.1/3.2 material certificates, NACE MR0175 conformity, and PMI testing if required.
Customisation: We offer OEM and custom machining – any size, any material, any quantity. Prototype tooling within 3‑7 days; production tooling 10‑15 days; order lead‑time 7‑15 days depending on volume.
- ISO 9001:2015
- API 6A / ASME B16.5
- 100% Dimensional Check
- Hardness & PMI Testing
- Custom Alloys & Sizes
Frequently Asked Questions About BX Ring Joint Gaskets
- Q: Can BX ring gaskets be re‑used?
- A: No – BX rings are designed for single‑use only. Once compressed, the metal deforms and cannot reliably seal again. Always replace with a new gasket.
- Q: What is the difference between BX and RX rings?
- A: BX rings are used exclusively with API 6BX flanges and are pressure‑energised (radial sealing). RX rings are used with API 6B flanges and are also pressure‑energised but have different dimensional standards and groove designs.
- Q: How do I select the correct material?
- A: The gasket material hardness should be 15‑20 HB lower than the flange material. Also consider process media, temperature, and corrosion resistance. Our technical team can advise you based on your service conditions.
- Q: What standards do you comply with?
- A: We manufacture to API 6A, ASME B16.5, JPI, GB, HG, and JB standards. Custom dimensions can also be produced.
- Q: What is the lead time for custom sizes?
- A: Prototype samples (tooling) typically 3‑7 days. Production tooling 10‑15 days. Order lead‑time 7‑15 days depending on quantity and material availability.
Partner with Kaxite Sealing – your trusted manufacturer of BX Ring Joint Gaskets. With full API compliance, a wide alloy range, and a commitment to quality, we deliver sealing solutions that perform reliably in the world's harshest high‑pressure environments. Request a free design review or get a bulk quote today – our engineering team responds within 24 hours.
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No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
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