BX Ring Joint Gasket (High-Pressure API 6A)

At Kriloha Ltd., we understand that in the world of ultra-high-pressure oil and gas, there is no room for “good enough.” When pressures exceed 10,000 psi, standard gaskets fail and safety becomes the only priority. The Kriloha BX Ring Joint Gasket is our most advanced metallic seal, engineered for the absolute limits of API 6A high-pressure technology. As a premier global supplier of heavy-duty sealing solutions, Kriloha Gaskets manufactures the BX series to provide a “fortress-level” barrier for your most hazardous operations.

The BX gasket is distinguished by its square-like octagonal profile and its unique installation physics. Unlike the R and RX series, the BX gasket is designed with a slightly larger diameter than the flange groove. This creates a high-interference fit on the outer sealing faces only. As the flanges are brought together, the BX gasket is compressed into the groove, creating a massive initial seal. Once the system is pressurized, the internal fluid enters the space behind the gasket and pushes it outward, further energizing the seal. This “Active Sealing” ensures that the higher the pressure, the tighter the Kriloha BX gasket holds.

A critical engineering feature of the Kriloha BX gasket is the Pressure Balance Hole. Without this small vertical channel, pressure could become trapped in the “dead space” behind the gasket during assembly, preventing it from seating correctly and potentially leading to a catastrophic blowout. Our CNC machining process ensures this hole is perfectly centered and deburred to maintain the structural integrity of the ring.

By choosing Kriloha Ltd., you are investing in a product that meets the most stringent NACE MR0175/ISO 15156 requirements for sour gas service. We offer BX gaskets in specialized materials like Inconel 625, Duplex Stainless Steel, and 316L, all with strictly controlled hardness levels. Whether you are operating a 20,000 psi wellhead in the North Sea or a high-pressure manifold in the Permian Basin, Kriloha BX Ring Joint Gaskets provide the metallurgical toughness and precision engineering required for absolute pressure containment.

Primary Use Cases

High-Pressure Wellheads: The industry standard for 10k, 15k, and 20k psi wellhead and Christmas tree connections.
Offshore Drilling Stacks: Critical sealing for high-pressure Blowout Preventers (BOPs) and kill/choke manifolds.
Subsea Production Systems: Designed for deepwater environments where extreme external and internal pressures demand a fail-safe metal seal.
High-Pressure Fracturing (Fracking): Reliable performance in hydraulic fracturing manifolds and high-velocity sand-slurry environments.
API 6A / 17D Equipment: Standardized sealing for specialized oilfield valves and pressure-containing vessels.

FAQs

Can a BX gasket be used in a standard R or RX flange?

No. BX gaskets are exclusively designed for API 6BX flanges. They have a different geometry and diameter than the R and RX series and will not fit into standard ASME B16.5 or API 6A R-grooves.

Why is there a hole through the BX gasket?

This is a “Pressure Equalization Hole.” It allows pressure to be equalized on both sides of the gasket during installation and operation, preventing the ring from being “locked” in a partially seated position by trapped air or fluid.

Is the BX gasket “pressure-energized” like the RX?

Yes, but to a higher degree. The BX uses both a heavy initial interference fit on the OD and process pressure to force the sealing faces against the groove walls, making it suitable for pressures up to 20,000 psi.

How do I know if I have installed a BX gasket correctly?

A correctly installed BX gasket will result in metal-to-metal contact between the flange faces. Unlike R/RX flanges, which have a “stand-off” gap, API 6BX flanges are designed to meet face-to-face.

What is the most common material for a BX gasket?

While Soft Iron and Low Carbon Steel are common, Kriloha frequently supplies 316L Stainless Steel or Inconel 625 for BX gaskets to provide the necessary corrosion resistance for high-pressure oilfield fluids.