Product Overview
The API 6A BX169 RTJ Ring Gasket is a precision-machined metallic sealing ring designed for compatible BX-style API 6BX flange connections in oil and gas equipment. The BX profile is pressure-energized: when correctly selected and installed in a matching flange groove, system pressure helps increase sealing contact. A BX ring also incorporates a pressure-passage hole to help equalize pressure that could otherwise become trapped in the groove.
This product page describes the SS316 version referenced by the supplied product sources. Material grade, flange compatibility, pressure class, hardness and sour-service suitability must be confirmed against the purchase specification and product documentation before ordering.
Key Features and Benefits
- BX169 profile: Identified as BX169 / BX-169 ring joint gasket for matching BX-style flange grooves.
- Metal-to-metal sealing: Forms a metallic seal when the gasket, flange groove, surface condition and installation procedure are compatible.
- Pressure-energized design: The BX profile is designed so internal pressure can help increase sealing contact under the specified operating conditions.
- Pressure-passage hole: A drilled passage is part of the BX design to help equalize pressure in the groove.
- SS316 material option: The referenced listings identify a 316 stainless steel version. Actual grade and heat/lot traceability should be verified from the material certificate.
- Dimensional and hardness checks: Inspection should cover the applicable drawing and standard requirements, including dimensions and hardness relative to the mating flange groove.
Specifications & Technical Details
| Category | Specification |
| Component Type | Ring Type Joint (RTJ) Gasket |
| Ring Number | BX-169 |
| Compatible Flange Size | 5-1/8" |
| Compatible Flange Type | API 6BX |
| Material | 316 Stainless Steel (SS316) |
| Pressure Rating | 10,000 PSI (10K) |
| Design Feature | Pressure-Energized with Cross-Drilled Vent Hole |
| Service Type | Standard and Corrosive Service (Sour Gas / H2S) |
| Typical Applications | BOP stacks, wellheads, choke manifolds, subsea tie-ins |
| Testing & Compliance | API 6A, ASME B16.20, strict hardness & dimensional checks |
Typical Applications
When specified for the service conditions and mating connection, BX169 RTJ gaskets may be used in compatible high-pressure oilfield equipment, including:
API 6A wellhead equipment and wellhead flange connections
Christmas tree assemblies and valves
Blowout preventer (BOP) stacks
Choke and kill manifolds
High-pressure oil and gas piping or flowline equipment
Drilling, completion and production systems
Selected refinery and petrochemical equipment where the flange design and gasket specification are compatible
Quality Inspection and Documentation
Depending on the purchase order and applicable standard, the following checks and records may be requested:
- Material identification and heat/lot traceability
- Chemical composition certificate or material test report
- Dimensional inspection against the applicable BX169 drawing or standard table
- Hardness verification against the specified limits and mating flange requirements
- Visual inspection of the sealing surfaces and pressure-passage hole
- Positive material identification (PMI), where specified
- Marking, packaging and inspection records required by the order
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