Ring Gasket


A ring gasket or Ring Type Joint Gasket (RTJ Gasket) is a sealing device used in various industrial applications to prevent leakage between two connecting flanges. It is designed to sit within the flange joint, creating a seal when the flanges are tightened together.

Regarding ensuring leak-free and reliable sealing solutions for your industrial applications, Asian Sealing Products is a leading provider of top-notch ring gaskets. Our extensive range of ring gaskets (RTJ gaskets) is meticulously crafted with industry standards such as API, DIN, BS, and ASME B16.20, ensuring compliance with recognized benchmarks in the field. This adherence commitment guarantees the reliability and performance of our ring gaskets in diverse industrial applications.

Key Features of Asian Sealing Products Ring Gaskets

  • Reliability: Our gaskets are engineered for long-term reliability, reducing the risk of leaks and ensuring the integrity of your systems. 
  • Durability: Built to last, our ring gaskets resist wear and tear, maintaining their sealing performance even in challenging environments.
  • Temperature Resistance: Whether facing extreme heat or cold, our gaskets maintain their sealing properties, providing consistent performance in diverse temperature ranges.  
  • Chemical Compatibility: Choose from various materials to ensure compatibility with the fluids and chemicals in your applications. 
  • Custom Solutions: Need a unique size or material? Our team can work with you to create customized ring gasket solutions tailored to your specifications.

Ring Gasket Applications

Ring Gaskets find application in various industries where a reliable and effective sealing solution is crucial. The versatility of ring gaskets allows them to be used in diverse industrial settings. Here’s a list of industries where ring gaskets commonly find application: 

Oil and Gas:

  • Pipeline connections 
  • Flange joints in oil refineries 

Chemical Processing: 

  • Sealing joints in chemical reactors 
  • Flange connections in chemical plants 

Power Generation: 

  • Boiler systems 
  • Steam and gas turbine connections 


  • Connecting pipes in petrochemical plants 
  • Sealing joints in storage tanks 


  • Machinery flange connections 
  • Hydraulic systems 


  • Pharmaceutical manufacturing equipment 
  • Sealing joints in cleanroom environments 


  • Slurry pump connections 
  • Flange joints in mining equipment 


  • Ship engine components 
  • Sealing joints in marine pipelines 

HVAC (Heating, Ventilation, and Air Conditioning): 

  • Ductwork connections 
  • Flange joints in HVAC systems 

Ring Gasket Materials: 

Ring gaskets are manufactured using various materials based on the application’s requirements. The material selection depends on factors such as the type of fluids being sealed, operating conditions (including temperature and pressure), and the overall environment. Here are some common materials used for manufacturing ring gaskets:

  • Soft iron
  • Stainless steel
  • High Alloy
  • Monel
  • Duplex and Super Duplex

The choice of material is critical to ensuring the ring gasket’s effectiveness in creating a reliable and durable seal. It’s essential to consider factors such as temperature resistance, chemical compatibility, pressure handling capabilities, and the overall performance requirements of the specific industrial applications.
Here are several common materials used for Ring gaskets, along with their key features:

  • Soft Iron: Ideal for low-pressure environments and non-corrosive media.
  • Stainless Steel: Offers excellent corrosion resistance, making it suitable for a wide range of applications, including those with high temperatures and aggressive chemicals.
  • High Alloy: Provides exceptional resistance to extreme temperatures, pressure differentials, and corrosive environments.
  • Duplex and Super Duplex: Well-suited for applications requiring high strength, corrosion resistance, and resistance to pitting and crevice corrosion.
Ring Gasket Types: 

At Asian Sealing Products, we manufacture 15 types of Ring gaskets (RTJ)with the highest quality, and we will ensure that the ring gaskets are delivered to the customers on time.

  1. Ring Gasket, R Type Oval cross-section
  2. Ring Gasket, R Type Octagonal cross-section
  3. RX Type Ring Gaskets
  4. BX Type Ring Gaskets
  5. SBX Type Ring Joint Pressure Energized Gaskets
  6. SRX Type Ring Gaskets
  7. Ring Type Blind Gaskets
  8. Ring Type Kammprofile – Octagonal Gaskets
  9. Ring Type Kammprofile – Adapter Gaskets
  10. Bridgeman Gaskets
  11.  Delta Gaskets
  12. Lens Type Gaskets
  13. Kammprofile Pressure Energized Gaskets
  14. Ring Type Rubber Coated Gaskets
  15. Ring Gaskets with PTFE Inserts


Product Details
  • Oval cross-section Industry Ring Joint Gaskets and Octagonal cross section Ring Joint Gaskets are used in pressures up to 10,000 psi
  • The hardness of the ring gasket should always be 30% lesser than the hardness of the flanges to prevent flange deformation
  • Dimensions and Tolerances for Ring Joint Gaskets and Grooves are covered in API 6A and ASME B16.20.
  • We stock a wide range of sizes and materials ready for immediate shipment from Ring Numbers R11 to R105.
  • Specially designed for very high pressure
  • All BX gaskets incorporate a pressure balance hole to ensure equalisation of pressure, which may get trapped in the grooves
  • Only suited for API BX flanges and grooves
  • Available from BX150 to BX303
  • SBX type Ring Type Joint Gaskets are as per API 17D standard.
  • Dimensions and tolerances of SBX type are as per API 6A, but it consists of additional pressure passage hole. The hole comes as per two options as stated in API 17D standard depending upon the requirement of the application where the flange is installed.
  • SBX type gaskets are strictly produced only using non corrosive material as per the requirement of API 17D standard.
  • An adaptation of the standard ‘r’ type gasket
  • Designed to fit the same groove design
  • Interchangeable with standard r type gaskets
  • Available from rX20 to rX215
  • Combination rings or transition rings combine two different sizes having the same pitch diameter permitting bolt up of differing size flanges
  • SrX type gaskets are similar to rX gaskets
  • But SrX Ring Joint Gaskets come with a special vent hole to allow water to escape in subsea applications
  • Ring Joint Gaskets can also be manufactured as a blind profile
  • Ring Joint Gaskets Rubber Coated
  • Rubber coated oval/octagon Ring Joint Gaskets (usually steel) are used in pressure testing to minimise damages to flanges
  • Rubber contact points provide additional seals while protecting the flange surfaces
  • Kammpro-orJ Ring Joint Gaskets are sized to the standard octagonal aPI 6a or aSMe B16.20 dimensions
  • With the addition of the Kammpro design, these Kammpro-OCT Ring Gaskets are applied to the sealing areas and faced with oxidation inhibited flexible graphite
  • The design is ideal for applications where cracking or embitterment has been experienced in ring joint groove
  • Kammprofile – PEG with Kammprofiled sealing surfaces are ideal for high pressure reactors where a rX type ring is typically used
  • Frequently, custom ring is used in the top and bottom of hydro processing reactors
  • gasket surfaces are serrated as per Kammprofiled specifications and are faced with oxidation inhibited flexible graphite.
  • It has the benefits of under compression graphite flows into minor imperfections creating higher seal tightness.
  • Kammpro-adapter gaskets allow ring type joint flanges to be mated up to a raised face flanges
  • They utilise the strengths of the full metallic with the added benefit of kamm profiled sealing surfaces laminated with flexible graphite
  • Since the pitch of the groove is sufficiently located under the raised face, this design is among the stoutest of adapter styles
  • The Bridgeman gasket is a pressure-activated gasket typically used on pressure vessel heads and valve bonnets for pressures of 1500 psi and above
  • The cross section of the gasket is such that the internal pressure acting against the ring forces is turned against the containing surface, creating a self-energized seal
  • Bridgeman gaskets are frequently silver-plated or lead-plated
  • This ensures in providing a softer surface and minimises the force required to flow the gasket metal into the flange surface
  • A delta gasket is a pressure-actuated gasket used primarily on pressure vessels and valve bonnets at high pressures in excess of 5000 psi
  • As with the lens gasket, complete drawings and material specifications must be supplied
  • Internal pressure forces the gasket material to expand, whereas the pressure forces tend to separate the flanges
  • Extremely smooth surface finishing of 63 micro inches or smoother is required when using this type of gasket
  • A lens type ring gasket is a line contact seal used in high pressure piping systems and in pressure vessel heads
  • The lens cross-section is a spherical gasket surface and requires special machining on the flanges
  • These gaskets fit with a small bolt load since the contact area is small and gasket seating pressures are very high
  • Normally, the gasket materials should be softer than the flange

When ordering lens gaskets, complete drawings and material specifications must be supplied.

  • A composite gasket that utilises a serrated metal core with a soft facing material
  • The metal core is machined on each contact face with concentric serrations, providing high pressure areas
  • This ensures the soft coating flows into any imperfections in the flange even at relatively low bolt loads
  • The soft facing material is engineered to compress into the serrations on the core and form a thin film across the peaks creating the ideal sealing density in the grooves of the profile
  • The result? You get a gasket that combines the benefits of soft cut materials with the advantages of seal integrity associated with metallic gaskets
  • Expanded graphite is the most common facing material used for Camprofile gaskets
  • However, other materials can also be used. For instance, PTFE for chemically aggressive duties and mica for high temperature services
  • Standard core design is parallel which offers the advantage of even stress distribution across the gasket face
  • Convex Cam profiles are also available which have a reduced depth of grooves towards the Profile Centre
  • This type of profile ensures a high seating stress in the middle of the profile and is effective for low bolt load applications
  • 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


Ring gaskets also known as RTJ. They are mostly used in offshore oil and gas pipelines and are designed to work under extremely high pressure and high-temperature applications. They are solid rings of metal in different cross sections like oval, round, octagonal etc… that deform under compression to create a tight seal.

Selecting the right RTJ gasket involves considering factors such as pressure and temperature requirements, flange design and dimensions, media compatibility, and joint assembly. Consulting with a trusted RTJ gasket supplier or manufacturer can help you determine the most suitable gasket for your specific needs.

Placing the gasket securely within the flange groove and pitch diameter dimensions is critical for the proper installation of Ring joint gaskets. Precise measurements and alignment of the flange are necessary to achieve an effective seal.

The lifespan of RTJ gaskets depends on various factors, such as operating conditions, maintenance practices, and gasket material. Regular inspections of the gaskets should be performed, and they should be replaced if signs of wear, degradation, or loss of sealing effectiveness are observed.

RTJ gaskets can be reused if they are in good condition and meet the required standards after inspection. However, it is generally recommended to replace gaskets during routine maintenance to ensure optimal sealing performance.

 If leakage occurs, inspect the flange surfaces for damage or misalignment. Check that the bolts are tightened to the recommended torque. If the issue persists, consider replacing the gasket to restore the seal.

The Asian sealing products supplier distributes ring gaskets (RTJ gasket) to various countries and global regions such as ring gasket USA, ring gasket UK, ring gasket in Australia, ring gasket the Middle East, Europe, South America, Africa, and Southeast Asia. Their distribution network covers a wide geographical area to cater to customers worldwide.

At Asian Sealing Products, our leadership in industrial ring joint gaskets is distinguished by our commitment to quality, precision manufacturing, and customer satisfaction. For a comprehensive understanding of our expertise, explore our in-depth article on Academia.edu. that is ( Ring Joint Gasket – Comprehensive guide )Discover the insights that make us the preferred choice in the industry.