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We manufacture products strictly adhering to international standards, including ASTM A105 (forged steel), A350 LF2 (low-temperature service), and A694.
Metallurgical Integrity: All raw materials undergo spectral chemical composition analysis and mechanical property verification upon intake.
Performance Metrics (ASTM A105):
Advanced Forging Process: Through controlled forging ratios and standardized heat treatment curves, we eliminate internal porosity and inclusions, ensuring a dense grain structure. This integrity is critical for maintaining structural stability under thermal expansion and pipeline vibration.
Global Standards and Pressure Ratings
Our products are engineered to align with global piping systems, ensuring seamless interchangeability and efficient installation.
Industry Standards
ASME B16.5, ASME B16.47, DIN, EN, JIS, and GOST.
Pressure Classes
Full range from Class 150 to Class 2500.
Installation Impact
Strict adherence to dimension tolerances ensures precise alignment of bolt holes, flange thickness, and raised face heights, significantly minimizing site-level rework and labor costs.
We offer a complete range of configurations to match specific system requirements:
Weld Neck (WN)
Tapered hub design for smooth stress distribution in high-pressure/temperature environments.
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Slip On (SO)
Simplifies pipe positioning; ideal for prefabricated piping systems.
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Blind (BL)
Used for pipeline isolation, pressure testing, or as a termination point for future expansion.
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Socket Weld (SW)
Internal socket design, commonly utilized in small-bore, high-pressure hydraulic lines.
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Threaded
Designed for maintenance or installation environments where welding is prohibited.
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We utilize advanced CNC machining to maintain core parameters that define operational success:
Sealing Surface Flatness
Critical for optimal gasket compression and leak-free operation.
Bolt Hole Alignment
Precision-bored to reduce assembly time during critical site installations.
Bore and Wall Thickness
Machined to meet specific pressure schedules, preventing structural failure and ensuring safety compliance.
We provide customized finishing options to prevent oxidation and corrosion during transit and storage:
Anti-Rust Oil: For short-term transit protection.
Black/Primer Paint: Standard protection for immediate installation.
Hot-Dip Galvanizing: Compliance with ASTM A123 standards; provides sacrificial anode protection for marine or high-humidity environments.
Export Packing: Flanges are packed in fumigation-free wooden crates with internal moisture-proof plastic liners to prevent salt-fog corrosion during ocean transit.
We provide the transparency required by large-scale EPC projects and industrial buyers:
lProcess Monitoring
Every batch undergoes visual inspection, dimensional verification, and mechanical testing.
Traceability
Each shipment is accompanied by a Material Test Certificate (MTC), documenting the specific Heat Number for full raw material traceability.
Advanced Testing
Ultrasonic or magnetic particle inspection (NDT) available upon project request.
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Specification |
Details |
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Standards |
ASME B16.5, B16.47, DIN, EN, JIS, GOST |
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Common Materials |
ASTM A105, A350 LF2, A694 |
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Size Range |
1/2" - 60" |
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Pressure Class |
Class 150 - Class 2500 |
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Facing Types |
RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint) |
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Documentation |
Full Heat Number Traceability and MTC provided |
We're professional carbon steel flange manufacturers and suppliers in China, specialized in providing high quality customized products. We warmly welcome you to wholesale bulk carbon steel flange for sale here from our factory.
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