High Precision CNC Turned Stainless Steel Flange End Cover for Leak-Proof Sealing in Gas-Liquid Separators
The High Precision CNC Turned Flange End Cover is a precision-engineered closure component specifically designed for gas-liquid separators, pressure vessels, and industrial tank systems. Manufactured through advanced CNC turning processes, this flange end cover provides reliable sealing, structural integrity, and dimensional consistency for demanding separation applications.
As a critical component in separator systems, the flange end cover serves as the access point for inspection, maintenance, and internal component replacement. Its precision-machined sealing surface ensures leak-proof operation under varying pressure and temperature conditions, while the robust stainless steel construction delivers long-term durability in corrosive industrial environments.
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High Precision CNC Turning
- Manufactured on advanced CNC lathes and turning centers, achieving dimensional tolerances of ±0.01 mm to ±0.005 mm on critical features
- Single-setup machining ensures perfect concentricity between the flange face, sealing groove, and bore diameter
- Superior surface finish of Ra ≤ 1.6 μm on sealing surfaces, with Ra ≤ 0.8 μm available for demanding applications
- Consistent quality across production batches, eliminating variations common in manual machining
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Premium Material Selection
- Standard options: Stainless Steel SS304 and SS316L, offering excellent corrosion resistance
- SS304: Suitable for general industrial applications with moderate corrosion requirements
- SS316L: Enhanced resistance to chlorides, acids, and corrosive media; ideal for marine, chemical, and pharmaceutical environments
- Additional materials available: SS316Ti, duplex stainless steel, Hastelloy®, Inconel®, and titanium for specialized applications
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Reliable Sealing Performance
- Flange face machined to industry standards: ASME B16.5, DIN EN 1092-1, JIS B2220, or GB/T 9119 as specified
- Available sealing face types:
- RF (Raised Face) - Standard for spiral wound and flat gaskets
- FF (Flat Face) - For full-face gaskets and low-pressure applications
- RTJ (Ring Type Joint) - For high-pressure, high-temperature services
- Precision-machined gasket groove ensures consistent compression and leak-proof operation
- Compatible with various sealing solutions: spiral wound gaskets, O-rings, flat gaskets, and metal ring gaskets
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Structural Integrity
- Designed to withstand pressure ratings up to 40 bar or higher, depending on size and material
- Suitable for operating temperatures ranging from -40°C to +300°C, with material and seal selection determining the specific range
- Robust wall thickness design ensures resistance to deformation under thermal cycling and pressure fluctuations
| Parameter | Details |
|---|---|
| Product Name | High Precision CNC Turned Flange End Cover |
| Material | SS304, SS316L, SS316Ti (custom materials available) |
| Manufacturing Process | CNC Turning, CNC Machining |
| Dimensional Tolerance | ±0.005 mm - ±0.01 mm (customizable) |
| Surface Finish | Ra ≤ 1.6 μm (sealing face), Ra ≤ 3.2 μm (non-sealing surfaces) |
| Flange Standards | ASME B16.5, DIN EN 1092-1, JIS B2220, GB/T 9119, or custom |
| Sealing Face Type | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint), or custom |
| Pressure Rating | Class 150, Class 300, Class 600, PN10, PN16, PN25, PN40, or custom |
| Size Range | DN50 - DN1000 (2″ - 40″) or custom sizes |
| Temperature Range | -40°C to +300°C (dependent on material and gasket) |
| Surface Treatment | Passivation, electropolishing, or as-machined |
Every flange end cover undergoes rigorous quality inspection to ensure reliability in critical applications:
- 100% dimensional inspection using CMM (Coordinate Measuring Machine) and precision measuring instruments
- Surface finish verification using profilometer to confirm sealing face quality
- Material traceability with mill test reports (MTR) per EN 10204 3.1
- Pressure testing available upon request for leak-proof verification
- Visual inspection for surface defects, scratches, or machining marks
- Third-party inspection accepted (SGS, BV, TÜV, etc.) upon request
We offer comprehensive OEM/ODM services to meet specific project requirements:
- Dimensions: Custom outer diameter, thickness, bore size, and overall height
- Flange Standards: ASME, DIN, JIS, GB, or custom dimensions per drawing
- Sealing Face: RF, FF, RTJ, tongue & groove, male & female, or custom configurations
- Materials: SS304, SS316L, SS316Ti, duplex stainless steel, Hastelloy®, Inconel®, titanium
- Surface Treatment: Passivation, electropolishing, mechanical polishing, coating
- Marking: Laser engraving of part numbers, material grades, pressure ratings, and logos
- Documentation: Material test reports, dimensional inspection reports, pressure test certificates, NDE reports (if applicable)
A: We offer a range of stainless steel materials to suit different application requirements:
| Material | Key Features | Typical Applications |
|---|---|---|
| SS304 | Good corrosion resistance, cost-effective | General industrial, food processing, water treatment |
| SS316L | Excellent corrosion resistance, low carbon content | Chemical processing, marine, pharmaceutical, high-chloride environments |
| SS316Ti | Enhanced high-temperature stability | High-temperature service, heat exchangers |
| Duplex / Super Duplex | High strength, exceptional chloride resistance | Offshore, oil & gas, desalination |
| Hastelloy® / Inconel® | Extreme corrosion and heat resistance | Severe chemical environments, high-temperature applications |
Other materials are available upon request. Material test reports (MTR) per EN 10204 3.1 are provided for full traceability.
A: All flange end covers are manufactured on advanced CNC turning centers and machining centers. Key precision capabilities include:
- Dimensional tolerance: ±0.005 mm to ±0.01 mm on critical features (sealing surface, bore diameter, flange thickness)
- Concentricity: ≤0.02 mm between the flange face and bore, achieved through single-setup machining
- Surface finish: Ra ≤ 1.6 μm on sealing faces as standard; Ra ≤ 0.8 μm available for demanding applications
- Thread accuracy: 6H/6g tolerance for threaded connections if applicable
A: We employ a comprehensive quality control system that includes:
- CNC program standardization to eliminate operator variability
- In-process inspection using precision gauges and probes
- First article inspection (FAI) for every new production run
- Statistical process control (SPC) to monitor dimensional stability
- Final 100% inspection of critical dimensions using CMM and optical comparators
A: We manufacture flange end covers to match standard pressure classes and custom requirements:
| Standard | Pressure Ratings |
|---|---|
| ASME B16.5 | Class 150, Class 300, Class 600, Class 900, Class 1500 |
| DIN EN 1092-1 | PN6, PN10, PN16, PN25, PN40, PN63, PN100 |
| JIS B2220 | 5K, 10K, 16K, 20K, 30K |
| GB/T 9119 | PN6, PN10, PN16, PN25, PN40 |
| Custom | Any pressure rating per customer specification |
For custom designs, we can accommodate pressure ratings up to 40 bar (approximately 580 psi) or higher, depending on size, material, and design parameters.
A: Leak-proof performance is ensured through multiple quality measures:
- Precision-machined sealing surface with controlled surface finish (Ra ≤ 1.6 μm minimum)
- Accurate flatness across the sealing face, verified using precision measuring tools
- Correct gasket groove dimensions (if applicable) to ensure proper compression
- Optional pressure testing of finished components upon request
- Material selection appropriate for the operating media and temperature
For critical applications, we recommend providing operating conditions (pressure, temperature, media) so we can verify the design suitability.
A: The temperature range depends on the material selection:
| Material | Temperature Range |
|---|---|
| SS304 / SS316L | -196°C to +425°C (cryogenic to high-temperature service) |
| SS316Ti | -196°C to +600°C |
| Duplex Stainless | -50°C to +300°C |
Note: The actual operating temperature may be limited by the gasket or seal material used. Please specify your operating conditions for proper material selection.
A: Yes. We specialize in custom manufacturing and OEM services. We can produce flange end covers based on:
- Engineering drawings (PDF, DWG, DXF)
- 3D models (STEP, IGES, SolidWorks, STP)
- Physical samples for replication
- Specification sheets with dimensions, material, and standard requirements
Customization options include:
- Outer diameter, thickness, and overall height
- Bore diameter and internal features
- Bolt hole size, count, and circle diameter
- Sealing face configuration and groove dimensions
- Material selection beyond standard options
- Surface treatment and finishing
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.