Metal winding strip: Typically stainless steel (304, 316L), carbon steel, Monel, Inconel, or Hastelloy. Provides structural strength, resilience and pressure resistance.
Filler material: Flexible graphite, PTFE, ceramic fiber, or mica. Delivers tight sealing, heat resistance and chemical compatibility.
Inner ring (centering ring): Reinforces the gasket and prevents inward buckling.
Outer ring (guide ring): Usually carbon steel or stainless steel, used for accurate centering and compression control.
Flange Surface Sealing Types
Products Features
1. Core Structure
It adopts a strict alternating winding process, combining V/W-shaped thin steel strips (304, 316L, etc., optional) with industrial-grade fillers such as graphite and PTFE.
Steel strips provide strength and pressure resistance, while fillers ensure tight sealing.
CNC-controlled winding eliminates gaps and prevents leakage risks.
2. Extreme Resistance
High-temperature resistance: Up to 1000°C (material-dependent), suitable for boilers and high-temperature reactors.
High-pressure resistance: Up to 42MPa (ANSI Class 2500), applicable to oil drilling and high-pressure pipelines in chemical industry.
Low-temperature/vacuum resistance: Stable at -200°C (e.g., LNG storage), suitable for vacuum furnaces and similar scenarios.
Corrosion resistance: Customizable material combinations (e.g., 316L + PTFE for acid resistance) to handle various corrosive media.
3. Easier Installation & Maintenance
Equipped with built-in metal inner reinforcement rings + outer positioning rings to address common industry pain points.
Inner reinforcement rings prevent deformation; outer positioning rings facilitate accurate installation.
Reduces flange precision requirements-ordinary machined flanges (Ra 3.2μm) are sufficient, cutting costs.
4. Flange Compatibility
Flat Face (FF) flanges: Suitable for low-to-medium pressure scenarios, such as water pipelines and ordinary valves.
Raised Face (RF) flanges: Commonly used in oil and petrochemical industries; inner reinforcement rings fit the raised face to minimize leakage.
Ring Type Joint (RTJ) flanges: Custom versions for ultra-high pressure and temperature, complying with API 6A/ASME B16.5 standards.
Why Choose Us?
Quality Assurance: Tested in accordance with ISO 9001/ASME B16.20; test reports available upon request.
Customization Support: Tailor-made designs based on working conditions and flange dimensions.
Cost Advantage: 3-5 times longer service life than ordinary gaskets, reducing downtime and maintenance costs.
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