R-24 Ring Joint Gasket (Stainless Steel) | API 6A / ASME B16.20 RTJ Flange Seal

The R-24 Ring Joint Gasket (RTJ) manufactured from premium Stainless Steel (typically 316/316L) is a critical metallic sealing component engineered for high-pressure, high-temperature flanged connections in the most demanding and corrosive oil, gas, and petrochemical environments. Designed to be housed within the precision-machined grooves of API 6B or standard ASME/ANSI B16.5 flanges, this metallic ring creates a highly secure, blowout-proof metal-to-metal seal when the flange bolts are properly torqued. It is an absolute necessity for ensuring environmental safety and pressure containment in wellheads, pipeline manifolds, and heavy-duty valve assemblies exposed to harsh media.

The defining characteristic of this R-24 gasket is its Stainless Steel metallurgy. Unlike standard low carbon steel, 316 stainless steel offers exceptional resistance to chemical corrosion, oxidation, and pitting, making it the premier choice for sour service (H2S), sweet gas (CO2), and offshore marine environments. While stainless steel is inherently durable, the gasket must still be softer than the flange to create a seal without damaging the flange face. This gasket is heat-treated to a strict maximum hardness of 160 HB (Brinell). During installation, the gasket undergoes "coining"—a controlled plastic deformation—allowing it to flow into the microscopic imperfections of the flange groove, resulting in a bubble-tight barrier against extreme-pressure fluids.

Available in both standard oval and octagonal cross-sections, the R-24 stainless steel gasket provides extreme reliability and longevity. Engineered in strict compliance with API 6A and ASME B16.20 specifications, this ring joint gasket ensures exact dimensional tolerances and unmatched sealing performance for critical infrastructure where corrosion resistance is paramount.

Features & Benefits

• API & ASME Compliant: Manufactured to strict API 6A and ASME B16.20 dimensional and material standards, ensuring perfect fitment in R-24 flange grooves.

• Premium Stainless Steel: Constructed from 316/316L Stainless Steel, providing superior resistance to chemical attack, H2S (sour gas), and extreme temperatures.

• Controlled Hardness: Heat-treated to a maximum hardness of 160 HB (83 HRB) to guarantee the gasket yields before the flange groove, protecting expensive pipeline equipment from scoring.

• Metal-to-Metal Seal: Provides a leak-free, extreme-pressure seal capable of withstanding the intense physical loads of heavy-duty oilfield and offshore environments.

• No Plating Required: The inherent corrosion resistance of the stainless steel eliminates the need for zinc or cadmium plating used on standard carbon steel gaskets.

Specifications & Technical Details

Applications

This R-24 Stainless Steel Ring Gasket is essential for establishing secure flanged connections in aggressive environments across the energy sector. Typical applications include sealing API 6B wellhead and Christmas tree flanges in sour gas fields, connecting high-pressure offshore pipeline segments, integrating heavy-duty valves into corrosive manifold systems, and providing reliable pressure containment in chemical and petrochemical refineries.

Quality Assurance

Each stainless steel ring joint gasket undergoes stringent quality control testing. This includes rigorous dimensional inspections to ensure exact API/ASME sizing, surface finish evaluations to guarantee a smooth sealing face, and mandatory hardness testing (Brinell/Rockwell) to verify the material is within the acceptable softness range (Max 160 HB) to safely protect field flanges.

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