Class 150 ASME A/SA105 ASME B16.5 Steel Flange
Class 150 A/SA105 ASME B16.5 Steel Flange
The Class 150 ASME A/SA105 ASME B16.5 Steel Flange is a durable forged carbon steel piping component designed to connect pipe, valves, fittings, pumps, and other industrial equipment. Combining dependable A105/SA-105 material properties with standardized ASME B16.5 dimensions, these flanges provide reliable connections for a wide range of commercial and industrial pressure piping systems.
ASTM A105 / ASME SA-105 Forged Carbon Steel
ASTM A105 / ASME SA-105 specifies forged carbon steel piping components intended for pressure service. A105/SA-105 steel flanges offer excellent mechanical strength, toughness, and durability for applications in oil and gas, petrochemical processing, refineries, power generation, chemical processing, manufacturing, utilities, HVAC, and industrial process piping.
The Class 150 designation identifies an ASME pressure class and does not mean the flange has a maximum working pressure of 150 PSI. Actual allowable pressure depends on material, operating temperature, and the applicable ASME pressure-temperature rating.
Class 150 Steel Flange Styles
Weld Neck, Socket Weld, and Slip-On Flanges
Weld neck flanges feature a tapered hub and are butt welded to the pipe for a strong permanent connection. Socket weld flanges receive the pipe inside a recessed socket and use an external fillet weld. Slip-on flanges slide over the pipe and are typically secured using fillet welds.
Threaded, Blind, and Lap Joint Flanges
Threaded flanges connect to compatible threaded pipe without a welded joint. Blind flanges contain no center bore and are used to close piping ends or isolate sections. Lap joint flanges are designed for use with compatible stub ends and can simplify flange alignment.
ASME B16.5 Flange Requirements
ASME B16.5 establishes requirements for applicable flange dimensions, pressure-temperature ratings, facing dimensions, bolt patterns, tolerances, and materials.
When ordering a Class 150 A/SA105 ASME B16.5 steel flange, verify nominal pipe size, flange style, facing, bore or pipe schedule requirements, material specification, and service conditions for proper system compatibility.