Class 300 Forged Carbon Steel Socket Weld, Raised-Face Flange for Schedule XH Pipe
Class 300 A105/SA-105 Socket Weld Flange for Schedule XH Pipe
The Class 300 ASTM A105 / ASME SA-105 Forged Carbon Steel Socket Weld Raised-Face Flange for Schedule XH Pipe provides a strong, compact connection for demanding industrial pressure piping systems. Combining forged carbon steel construction, a precision-machined socket, and raised-face sealing surface, this flange delivers reliable performance with Schedule XH (Extra Heavy) pipe.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 300 socket weld flange offers excellent mechanical strength, toughness, and durability. A105/SA-105 is widely specified for pressure-containing components used throughout oil and gas, petrochemical processing, refineries, power generation, chemical processing, manufacturing, utilities, and industrial process piping systems.
The Class 300 designation identifies an ASME pressure class rather than a maximum working pressure of 300 PSI. Actual allowable pressure depends on material, operating temperature, and applicable pressure-temperature ratings.
Socket Weld Design for Schedule XH Pipe
A socket weld flange incorporates a recessed socket designed to receive the connecting pipe. Schedule XH pipe is inserted into the socket, positioned with the required installation clearance, and permanently secured using an external fillet weld.
For a given nominal pipe size, Schedule XH increases pipe wall thickness and reduces inside diameter while maintaining the same outside diameter as other schedules. The socket is therefore sized for the applicable nominal pipe outside diameter.
Raised-Face Flange Construction
The raised-face (RF) flange features an elevated gasket seating area surrounding the bore. This design concentrates bolting force over the gasket area, helping create a dependable seal between compatible mating flanges.
Class 300 A105/SA-105 socket weld flanges are commonly manufactured to applicable ASME B16.5 dimensional and pressure-temperature requirements.
When ordering, verify nominal pipe size, Schedule XH pipe dimensions, socket dimensions, Class 300 rating, raised-face configuration, A105/SA-105 material, and service requirements to ensure proper fit and reliable industrial piping performance.