Function and Purpose
A Blind Flange is a solid flange without a center opening, used to close off the end of pipes, valves, or pressure vessels. It serves as a terminal closure component, playing a critical role during maintenance, inspection, or system expansion.
Main Applications
- Pipe Closure: Seal pipe ends to prevent medium leakage
- System Isolation: Isolate specific pipe sections during maintenance
- Pressure Testing: Closure during pipeline pressure tests
- Future Connection: Reserve connection points for pipeline expansion
Structural Features
- Solid construction with no center hole
- Thicker than other flanges of same specification
- Bolt connection to mating flange
- Available in RF, FF, or RTJ sealing faces
Types
- Standard Blind: Regular thickness
- Heavy Duty Blind: For higher pressure
- Spectacle Blind: One side blind, one side ring for frequent switching
- Spade Blind: Inserted between mating flanges
Pressure Ratings
Class 150-2500 (ASME) or PN6-PN100 (European)
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