1. Overview
2. Core Structure
Tapered Neck: Seamlessly welded to the pipeline via butt welding, the tapered design achieves a smooth transition between the flange neck and pipe inner wall, minimizing stress concentration and enhancing load-bearing capacity.
Flange Disc: Features evenly spaced bolt holes for fastening with matching flanges. The sealing surface is precision-machined into various types (RF, FF, RTJ, MF) to accommodate different media and pressure requirements, paired with gaskets for leak-proof performance.
Special Variant: Long Weld Neck (LWN) Flange with an elongated cylindrical neck (2-3x longer than standard models) for direct welding to pressure vessels or tanks, eliminating the need for additional adapters.
3. Key Specifications
4. Product Advantages
Superior Structural Strength: Integrated neck design distributes stress uniformly, withstanding pressures up to Class2500/PN400 and temperatures ranging from -200℃ to 800℃, resistant to mechanical vibration and fatigue.
Reliable Sealing Performance: Precision-finished sealing surfaces (Ra≤3.2μm) paired with compatible gaskets prevent leakage of corrosive, toxic, or high-viscosity media, ensuring operational safety.
Easy Installation & Alignment: Tapered neck provides clear positioning reference, simplifying welding and assembly processes, reducing errors, and improving construction efficiency.
Long Service Life: High-quality materials combined with forging and heat treatment (quenching, tempering) enhance corrosion, wear, and oxidation resistance, extending product lifespan.
Global Interchangeability: Compliance with international standards ensures compatibility with global piping components, facilitating cross-border trade and project collaboration.
5. Manufacturing Process
6. Typical Applications
Oil & Gas: Upstream exploration, midstream pipeline transportation, downstream refining and petrochemical plants.
Chemical Industry: High-temperature/high-pressure reaction vessels, corrosive medium pipelines (acids, alkalis, solvents).
Power Generation: Thermal power, nuclear power boiler pipelines, steam turbines.
Water Treatment: Industrial wastewater treatment, seawater desalination systems.
Marine Engineering: Ship pipelines, offshore platform equipment connections.
Machinery Manufacturing: Heavy equipment hydraulic systems, industrial boiler pipelines.
7. Customization Services
Custom sizes, pressure ratings, and bolt hole configurations.
Special materials for extreme environments (e.g., titanium alloy, duplex stainless steel).
Non-standard sealing surfaces (e.g., tongue-and-groove, custom roughness).
Anti-corrosion surface treatments (PTFE lining, epoxy coating, galvanization).
8. Quality Assurance
ISO 9001:2015 certified manufacturing process.
Raw material certification (Mill Test Report, MTR) provided for each batch.
100% hydrostatic pressure testing and non-destructive testing for critical components.
Dimensional accuracy verified by advanced measuring equipment.
