Blind Flanges — Secure Piping Closure | High Integrity & Pressure Resistance

Blind Flanges are solid discs used to seal or close the end of a piping system, valve, or pressure vessel opening. Unlike other flanges, blind flanges have no bore, making them the ideal solution for temporary or permanent termination of a pipeline while still allowing easy access for inspection, pressure testing, or future extensions.

Standards & Pressure Ratings

Blind flanges are manufactured to international standards to ensure dimensional compatibility and reliable performance:

• ASME B16.5 — Class 150, 300, 600, 900, 1500, and 2500
• DIN / EN Standards — PN6 to PN40
• Available in facing types such as Raised Face (RF), Flat Face (FF), and Ring-Type Joint (RTJ) depending on the application

Key Features

• Leak-Tight Seal — Ensures a strong and secure closure for pipes and pressure vessels.
• Ideal for Maintenance & Testing — Easy to install and remove, allowing inspection and hydrostatic pressure testing without dismantling the line.
• High Pressure Resistance — Suitable for both low- and high-pressure systems due to solid construction.
• Standardized Dimensions — Fully compatible with ASME, DIN, and EN companion flanges.
• Material Versatility — Available in carbon steel, stainless steel, and special alloys for a range of environments.

Typical Dimensions

• Size Range: ½” to 24” (DN15–DN600) and above
• Pressure Ratings: ASME Class 150 to 2500 / DIN PN6 to PN40
• Facing Options: RF, FF, RTJ
• Drilling: Standardized bolt holes to match companion flanges

Applications

• Oil & Gas pipelines
• Petrochemical and chemical plants
• Power generation systems
• Water treatment and distribution lines
• Shipbuilding, fire protection, and pressure vessel manufacturing