Class 150 Forged Carbon Steel Weld Neck, Flat-Face Flange for Schedule XH Pipe
Class 150 A105/SA-105 Weld Neck Flange for Schedule XH Pipe
The Class 150 ASTM A105/ASME SA-105 Forged Carbon Steel Weld Neck Flat-Face Flange for Schedule XH Pipe provides a strong, durable connection for heavy-wall industrial piping systems. Designed for Schedule XH (Extra Heavy) pipe, this forged steel flange combines dependable mechanical strength with a weld neck configuration engineered for permanent pipe connections.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 150 flange provides excellent strength, toughness, and durability for pressure piping applications. A105/SA-105 is widely specified for forged flanges and pressure-containing components used in oil and gas, petrochemical, power generation, utilities, manufacturing, and industrial process piping.
The Class 150 designation represents an ASME pressure class rather than a maximum operating pressure of 150 PSI. Allowable pressure depends on material, operating temperature, and applicable pressure-temperature ratings.
Weld Neck Flange for Schedule XH Pipe
A weld neck flange features a tapered hub that transitions from the flange body to the pipe. The flange is butt welded directly to the Schedule XH pipe, creating a permanent connection while helping distribute piping stresses through the hub.
The Schedule XH bore is sized to correspond with applicable Extra Heavy pipe dimensions. Schedule XH corresponds with Schedule 80 in many common sizes, but dimensions should be verified before ordering.
Flat-Face Flange Design
The flat-face (FF) flange provides a gasket seating surface across the flange face without the elevated sealing area found on raised-face designs. Flat-face configurations should be matched with compatible mating components and appropriate gaskets.
When selecting a Class 150 A105/SA-105 weld neck flat-face flange for Schedule XH pipe, verify nominal pipe size, bore, wall thickness, facing, material specification, and applicable dimensional standard to ensure proper fit, reliable sealing, and dependable industrial piping performance.