Class 150 Forged Carbon Steel Blind, Raised-Face Flange
Class 150 ASTM A105 / ASME SA-105 Blind Flange
The Class 150 ASTM A105 / ASME SA-105 Forged Carbon Steel Blind Flange with Raised Face is designed to securely close the end of an industrial piping system, valve connection, or pressure vessel opening. Unlike flanges with a center bore, a blind flange is solid, providing a removable closure for piping systems requiring dependable pressure containment and future access.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 150 blind flange provides excellent strength, toughness, and durability for pressure piping applications. A105/SA-105 forged carbon steel is widely used for industrial flanges, fittings, valves, and other pressure-containing components.
The Class 150 designation represents an ASME pressure class and does not mean the flange is limited to 150 PSI. Allowable working pressure depends on material, operating temperature, and applicable pressure-temperature ratings.
Blind Flange for Pipe System Isolation
A carbon steel blind flange contains no center opening, allowing it to block flow and terminate a piping run. Because it is bolted rather than permanently welded closed, the blind flange can be removed when system expansion, inspection, cleaning, or maintenance is required.
Raised-Face Flange Design
The raised-face (RF) flange incorporates an elevated gasket seating surface around the central sealing area. This design concentrates bolting force on the gasket to help establish an effective seal between compatible flange surfaces.
Class 150 A105/SA-105 blind flanges are commonly manufactured to ASME B16.5 requirements for applicable sizes. This standard establishes dimensions, facing requirements, bolt patterns, tolerances, and pressure-temperature ratings.
For industrial contractors, pipe fabricators, utilities, and MRO operations, the Class 150 A105/SA-105 forged carbon steel raised-face blind flange provides a strong, serviceable solution for terminating and isolating industrial piping systems.