Flange Ring Joint Gaskets (RTJ) are high-integrity, metallic sealing rings designed for extreme high-pressure and high-temperature applications. Featuring a unique octagonal or oval cross-section, these gaskets wedge into the grooved mating faces of flanges to create a robust, self-energizing metal-to-metal seal. Shanxi Xinshunda Flange Manufacturing Co., Ltd. manufactures precision RTJ gaskets in strict accordance with API 6A and ASME B16.20 standards, ensuring leak-proof performance in the most demanding oilfield and refinery environments. Comprehensive material traceability and third-party inspection certifications are available upon request.
Production Details
Our ASTM A193 bolts are produced using state-of-the-art CNC machinery to ensure every thread and hexagonal head meets precise engineering drawings. The raw materials undergo strict chemical composition analysis before entering the production line. Each fastener is subjected to rigorous surface inspection to ensure the absence of defects such as cracks, laps, or improper coating. The dimensional accuracy is verified using advanced measuring instruments, ensuring a perfect match with your mating flanges.
Product Properties and Application
Product Properties
Superior Sealing Performance: The wedge action of the octagonal or oval profile ensures a tight, metal-to-metal seal that improves under increasing pressure.
High-Pressure & Temperature Resistance: Engineered to withstand extreme operational stresses, making them ideal for critical service conditions.
Durable & Reusable: Manufactured from premium forged metals; properly installed gaskets can often be reused if removed carefully without damaging the seating surfaces.
Precise Dimensional Accuracy: CNC-machined to exact tolerances, guaranteeing a perfect fit within standardized flange grooves.
Application
Ring Joint Gaskets are critically important in high-pressure and high-temperature industrial sectors. They are extensively used in Oil & Gas Exploration and Drilling, Petrochemical Refineries, Offshore Platforms, High-Pressure Steam Lines, and Hydraulic Systems. They are the standard choice for pressure vessels, heat exchangers, and pipelines where absolute leak prevention is mandatory.
|
Parameter |
Specification |
|
Standard |
API 6A, ASME B16.20, ASME B16.5, DIN 2696 |
|
Product Type |
Ring Joint Gasket (Octagonal, Oval, RX, BX) |
|
Material |
Soft Iron, Low Carbon Steel, 304/316 Stainless Steel, Monel, Inconel, Hastelloy |
|
Size Range |
1/2" to 36" (Metric DN15 to DN900) |
|
Pressure Rating |
Class 150 to Class 2500 (PN 20 to PN 420) |
|
Type / Style |
R-Type (Oval/Octagonal), RX-Type, BX-Type |
|
Hardness |
90-120 HB (Soft Annealed condition) |
|
Surface Finish |
Ra ≤ 63 μin (1.6 μm) on sealing surfaces |
|
Packing |
Plywood Cases, Wooden Pallets, or Custom Export Packaging |
Physical Properties
|
Property |
Value |
|
Tensile Strength |
Varies by material (e.g., Soft Iron: > 206 MPa, 316 SS: > 515 MPa) |
|
Yield Strength |
Varies by material (e.g., Soft Iron: > 103 MPa, 316 SS: > 205 MPa) |
|
Operating Temperature |
-200°C to +800°C (depending on selected material) |
|
Hardness Differential |
Gasket hardness must be at least 30 HB less than the flange hardness |
|
Density |
7.85 g/cm³ (Carbon Steel) / 7.98 g/cm³ (Stainless Steel) |
QA & QC
At Shanxi Xinshunda, we implement a rigorous Quality Control system for our RTJ gaskets. Every gasket undergoes Spectroscopic analysis to verify material composition. Dimensional accuracy is checked using calibrated gauges to ensure compliance with API 6A and ASME B16.20. Surface finish and hardness are strictly tested to guarantee optimal sealing performance. Mill Test Certificates (EN 10204 3.1) are provided with every shipment.
Packing, Storage, Handling and Transportation
To prevent damage to the precision-machined sealing surfaces, each Ring Joint Gasket is carefully cleaned, lightly oiled to prevent atmospheric corrosion, and individually wrapped in plastic or bubble wrap. They are then placed in sturdy plywood cases or cardboard boxes with custom foam inserts to prevent movement during transit. Each package is clearly labeled with the size, standard, material, and hardness. Store in a dry, climate-controlled environment to avoid condensation and rusting.
Strategic Partners with Shanxi Xinshunda
With over 15 years of manufacturing expertise, Shanxi Xinshunda Flange Manufacturing Co., Ltd. has proudly supplied premium industrial flanges and sealing solutions to 3,800+ global customers across 70+ countries. We are committed to ensuring your critical piping systems operate safely and efficiently, making us your trusted partner in the global energy and processing industries.
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