BX-153 Ring Joint Gasket – 316 Stainless Steel API 6A RTJ Sealing Ring

The BX-153 Ring Type Joint (RTJ) Gasket is a premium, high-integrity sealing ring engineered for use in high-pressure, high-temperature oil and gas applications. Specifically designed for mating with API 6BX flanges, this specialized gasket is essential for ensuring a blowout-proof, metal-to-metal seal in critical wellhead equipment, blowout preventers (BOPs), and ultra-high-pressure manifold systems operating at extreme pressures from 10,000 PSI to 20,000 PSI.

Manufactured from high-grade 316 Stainless Steel (SS316), this BX-153 gasket offers superior resistance to corrosion, chemical attack, and high temperatures compared to standard low-carbon steel rings. It is exceptionally well-suited for harsh environments, including sour gas (H2S) service and offshore marine applications. The BX series utilizes a unique, pressure-energized design. As internal line pressure increases, the sealing force between the gasket and the flange groove actively intensifies, creating a highly reliable, bubble-tight seal. Furthermore, the BX-153 is precision-machined with a standard pressure-equalizing cross-hole to prevent the dangerous trapping of pressure within the ring groove during rapid system depressurization.

By design, API Type BX gaskets allow for face-to-face contact of the mating flanges upon full torque, meaning the gasket is completely confined and protected from external environmental factors and over-bolting.

Features & Benefits

• Pressure-Energized Seal: The specialized profile utilizes internal system pressure to continuously improve the sealing force against the flange groove, ensuring maximum reliability under extreme 10K to 20K PSI conditions.

• Premium 316 SS Construction: Provides exceptional corrosion resistance against harsh well fluids, sour gas (H2S), and offshore marine environments, significantly extending service life.

• Face-to-Face Flange Contact: Specifically designed for API 6BX flanges to allow complete face-to-face mating, distributing bolt load evenly and protecting the gasket from physical damage.

• Integrated Vent Hole: Features a precision-drilled pressure equalizing passage to prevent fluid or pressure entrapment behind the gasket.

• API 6A / ASME B16.20 Compliant: Machined to exacting dimensional tolerances and strict maximum hardness specifications to ensure it safely deforms into the harder flange groove without damaging the flange face.

Specifications & Technical Details

Applications

The BX-153 Stainless Steel Gasket is an indispensable component in critical, ultra-high-pressure oilfield infrastructure. Typical applications include sealing connections on high-pressure wellhead assemblies, Blowout Preventer (BOP) stacks, choke and kill manifolds, frac trees, and deepwater subsea control systems where fail-safe sealing and extreme corrosion resistance are mandatory.

Quality Assurance

Each BX-153 gasket is CNC-machined to exact API 6A tolerances. The 316 stainless steel undergoes rigorous metallurgical testing, including strict maximum hardness verification (typically max 160 HB), ensuring the gasket remains softer than the mating flange to prevent groove scoring during makeup. All units are visually and dimensionally inspected and fully traceable to guarantee unmatched performance in the field.

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