1. Proper Selection
Select the appropriate flange type, material, and pressure rating based on parameters such as the pipeline medium, pressure, and temperature. The sealing surface configuration (e.g., raised face, flat face) must also match the operating conditions to avoid issues caused by improper selection.
2. Standardized Installation
Ensure the flange sealing surfaces are clean and the gasket is positioned flat during installation. Tighten bolts in a diagonal sequence across multiple passes to ensure uniform clamping force. Using a torque wrench helps control bolt preload, preventing overtightening or undertightening.
3. Regular Inspection and Maintenance
Periodically check for loose bolts and signs of gasket aging or corrosion, and promptly replace any defective components. In systems subject to frequent temperature fluctuations, increasing the frequency of inspections is recommended to prevent potential issues.
4. Consideration of Cost-Effectiveness and Suitability
During the project design phase, comprehensively compare the costs, installation complexity, and long-term maintenance requirements of flanges versus other connection methods. Welding may be more economical for applications that do not require frequent disassembly, whereas flanges offer advantages in situations requiring flexible maintenance.
