Ring Gasket

Oval and octagonal cross-section Ring Type Joint (RTJ) gaskets are widely used in applications with operating pressures of up to 10,000 psi, providing reliable metal-to-metal sealing for critical flange connections.

All dimensions and groove tolerances for oval and octagonal RTJ gaskets are manufactured in strict accordance with API 6A and ASME B16.20 standards, ensuring accurate flange compatibility and consistent performance.

We maintain a comprehensive inventory of RTJ gaskets in a wide range of sizes and material grades, available for immediate dispatch from Ring Numbers R11 through R105.

BX-type Ring Type Joint (RTJ) gaskets are specifically engineered for very high-pressure applications, where reliable sealing under extreme operating conditions is critical. Each BX gasket incorporates a pressure balance hole designed to equalize any pressure that may become trapped within the flange grooves, thereby enhancing sealing stability and safety.

BX-type gaskets are exclusively compatible with API BX flanges and grooves and are available in standard sizes ranging from BX150 to BX303, in accordance with applicable API specifications.

SBX-type RTJ gaskets are manufactured in compliance with the API 17D standard for subsea and critical offshore applications. While the dimensions and tolerances of SBX gaskets follow API 6A requirements, they include an additional pressure passage hole, provided in two configuration options as specified under API 17D, depending on the installation and service requirements.

To meet stringent subsea performance and durability criteria, SBX-type gaskets are manufactured exclusively from non-corrosive materials, as mandated by API 17D, ensuring long-term reliability in aggressive offshore environments.

RX-type Ring Type Joint (RTJ) gaskets are an enhanced adaptation of the standard Type R gasket, engineered to deliver improved sealing performance under higher internal pressures. While maintaining the same groove design as Type R gaskets, RX gaskets are fully interchangeable with standard R-type gaskets.

The RX profile is designed to become pressure-energized during operation, allowing the gasket to deform more effectively under increasing system pressure and achieve superior metal-to-metal sealing.

RX-type RTJ gaskets are available in standard sizes ranging from RX20 to RX215, in accordance with applicable API and ASME specifications.

Combination rings, also known as transition ring gaskets, are specially designed to connect two flanges of different nominal sizes while maintaining the same pitch circle diameter, allowing proper bolt alignment and secure assembly.

These ring gaskets enable safe and reliable sealing between mismatched flange sizes, making them ideal for retrofit applications, system modifications, or temporary connections where standard flange matching is not possible. Transition rings provide an effective solution without compromising sealing integrity or joint performance in high-pressure service conditions.

SRX-type Ring Type Joint (RTJ) gaskets are similar in design and sealing performance to RX-type gaskets, but incorporate a special vent hole to allow trapped water to escape during installation and operation in subsea applications.

This venting feature helps prevent pressure buildup caused by trapped fluids, improving sealing reliability and reducing the risk of gasket or flange damage in underwater and offshore service conditions.

Blind Ring Type Joint (RTJ) gaskets are manufactured with a solid profile to fully isolate or blank off pipelines and pressure vessels during maintenance, testing, or shutdown operations. These gaskets provide secure sealing in high-pressure flange connections where flow isolation is required.

Rubber-coated RTJ gaskets, typically manufactured from steel with an elastomer coating, are commonly used during hydrostatic and pressure testing to minimize damage to flange grooves and sealing surfaces. The rubber coating creates additional sealing contact points while protecting the flange faces from metal-to-metal abrasion, ensuring safe testing without compromising flange integrity.

Kammprofile Octagonal (Kammpro-OCT) Ring Type Joint (RTJ) gaskets are manufactured to standard octagonal dimensions in accordance with API 6A and ASME B16.20.

The Kammprofile design incorporates precision-engineered grooves on the gasket surface, which are then faced with oxidation-inhibited flexible graphite to enhance sealing performance. This design is particularly effective in applications where flange groove cracking or embrittlement has been observed, providing a reliable seal while accommodating flange surface imperfections.

Kammpro-OCT gaskets combine the metal-to-metal sealing strength of RTJ gaskets with the flexibility and chemical resistance of graphite facings, making them ideal for high-pressure, high-temperature, and aggressive chemical environments.

Pressure-Energized Gaskets (PEG) with Kammprofiled surfaces are ideal for high-pressure reactors, often used at the top and bottom flanges of hydroprocessing equipment.

The serrated surfaces, faced with oxidation-inhibited flexible graphite, allow the graphite to flow into minor imperfections under compression, ensuring enhanced seal tightness and reliable performance in extreme conditions.

Kammprofile Adapter Gaskets enable RTJ flanges to mate with raised-face flanges, combining the strength of full-metal construction with Kammprofiled sealing surfaces laminated with flexible graphite.

With the groove pitch properly positioned under the raised face, this design provides one of the most robust and reliable adapter-style seals for high-pressure applications.

Bridgeman gaskets are pressure-activated gaskets commonly used on pressure vessel heads and valve bonnets for pressures of 1500 psi and above.

The gasket’s cross-section is designed so that internal pressure converts axial force into radial sealing force, creating a self-energized metal-to-metal seal.

To enhance performance, Bridgeman gaskets are often silver-plated or lead-plated, providing a softer surface that facilitates metal flow into the flange, reducing the force required for effective sealing.

Delta gaskets are pressure-actuated gaskets designed for high-pressure applications, typically on pressure vessels and valve bonnets operating above 5000 psi.

Under internal pressure, the gasket material expands to maintain a tight seal, counteracting the forces that tend to separate the flanges.

As with lens gaskets, complete drawings and material specifications are required, and the flange surface must be finished to 63 microinches or smoother to ensure reliable sealing performance.

Lens ring gaskets are line-contact seals used in high-pressure piping systems and pressure vessel heads.

With a spherical cross-section, these gaskets require precisely machined flanges. Their small contact area allows seating with minimal bolt load, while generating high gasket pressure for effective sealing.

Gasket materials are typically softer than the flange, and complete drawings and material specifications must be provided when ordering to ensure proper fit and performance.

RTJ Kammprofile gaskets are composite gaskets featuring a serrated metal core with a soft facing material. The metal core is machined with concentric serrations on each contact face, creating high-pressure points that allow the soft facing to flow into flange imperfections, even at relatively low bolt loads.

The soft facing material, commonly expanded graphite, compresses into the serrations, forming a thin, uniform film across the peaks to achieve optimal sealing density within the groove.

This design combines the conformability of soft materials with the strength and reliability of metallic gaskets. Alternative facings such as PTFE (for chemically aggressive services) or mica (for high-temperature applications) can also be used, depending on the operating conditions.

• A wide range of seating stresses under which the seal is effected and maintained
• Recommended for insufficient bolt loads to seal conventional gasket materials
• Easy to handle and fit
• Suitable for a wide range of operating conditions
• The soft facing layer prevents damages to the mating flange
• Sealing is not sensitive to uneven bolt loading conditions
• Can be refurbished with a new facing layer and reused

When it comes to high-pressure sealing solutions, Asian Sealing Products ring gaskets deliver precision, reliability, and durability. Trusted by industries worldwide, our gaskets are engineered to perform in oil & gas, petrochemical, power generation, and marine applications.

Key Advantages:

• Precision Engineering: Advanced machining and strict quality controls ensure exact dimensions and leak-proof seals, even under extreme pressures and temperatures.
  
• Global Standards Compliance: Fully compliant with ASME B16.20, API 6A, DIN, and BS specifications, guaranteeing flange compatibility and safety.
  
• Premium Materials: Manufactured from high-grade metals and alloys, resistant to corrosion, thermal stress, and wear, extending equipment life.
  
• Custom Solutions: Bespoke sizes, materials, and designs with technical support, tailored to your unique operational needs.
  
• Reliable Supply: Efficient production and logistics ensure on-time delivery for critical projects.
  
• Proven Performance: Used by EPC contractors, OEMs, and operators worldwide, delivering consistent, high-performance sealing in demanding environments.

Each gasket is precision-machined in-house from fully certified materials, ensuring consistent quality and strict compliance with dimensional tolerances specified under ASME B16.20 and API 6A standards. This manufacturing control guarantees reliable flange compatibility, superior sealing performance, and long service life in high-pressure and high-temperature applications.