Class 150 F304/L Stainless Steel Blind, Raised-Face Flange
Class 150 F304/L Stainless Steel Blind Raised-Face Flange
The Class 150 F304/L Stainless Steel Blind Raised-Face Flange manufactured to ASME A/SA182 and ASME B16.5 requirements provides a strong, corrosion-resistant solution for closing the end of an industrial piping system, valve connection, pressure vessel nozzle, or unused flanged opening. Its solid stainless steel construction provides dependable performance while maintaining a removable bolted connection for future system access.
ASME A/SA182 F304/L Stainless Steel
ASTM A182 / ASME SA-182 F304/F304L stainless steel provides excellent general corrosion resistance, mechanical strength, durability, and fabrication characteristics. The lower carbon content of F304L helps minimize carbide precipitation during welding, making it especially useful in welded piping systems where corrosion resistance in heat-affected areas is important.
Class 150 Blind Flange Design
A blind flange has no center bore, allowing it to completely close and isolate a piping opening. Unlike a permanently welded closure, a bolted blind flange can be removed for inspection, cleaning, maintenance, pressure testing, system modifications, or future piping expansion.
The Class 150 designation represents an ASME pressure class rather than a maximum working pressure of exactly 150 PSI. Allowable pressure depends on material, size, operating temperature, and applicable ASME pressure-temperature ratings.
Raised-Face Flange Construction
The raised-face (RF) design incorporates an elevated gasket seating area around the flange bore region. This configuration concentrates bolting load over the gasket seating surface to help produce an effective seal between compatible flanged components.
Manufactured to ASME B16.5, these flanges follow standardized requirements for applicable dimensions, facing, bolt patterns, tolerances, and pressure-temperature ratings.
Selecting an F304/L Blind Flange
When ordering a Class 150 F304/L stainless steel blind raised-face flange, verify nominal pipe size, F304/F304L material, Class 150 rating, RF facing, ASME A/SA182 material specification, ASME B16.5 dimensional requirements, gasket, bolting, operating temperature, and process media for dependable industrial piping performance.