Class 300 ASME A/SA105 ASME B16.5 Steel Flange used with Schedule 40, XH & 160 Pipe
Class 300 A/SA105 B16.5 Steel Flange for Schedule 40, XH & 160 Pipe
The Class 300 ASME A/SA105 ASME B16.5 Steel Flange used with Schedule 40, XH, and Schedule 160 Pipe provides a strong, dependable connection for demanding industrial pressure piping systems. Manufactured from forged carbon steel, these flanges offer excellent mechanical strength, durability, and dimensional consistency for commercial and industrial piping applications.
ASTM A105 / ASME SA-105 Forged Carbon Steel
ASTM A105 / ASME SA-105 is a widely specified forged carbon steel material for pressure-containing piping components. A105/SA-105 steel flanges are commonly used throughout oil and gas, petrochemical processing, refineries, power generation, chemical plants, manufacturing, utilities, and industrial process piping systems.
The Class 300 designation represents an ASME pressure class rather than a maximum operating pressure of 300 PSI. Actual allowable pressure depends on material, operating temperature, and applicable ASME pressure-temperature ratings.
Schedule 40, XH and Schedule 160 Pipe Compatibility
For the same nominal pipe size, Schedule 40, XH (Extra Heavy), and Schedule 160 pipe have the same outside diameter but different wall thicknesses and inside diameters. Heavier pipe schedules generally provide thicker walls and smaller internal bores.
Weld Neck and Socket Weld Flanges
Weld neck flanges can be manufactured with bores corresponding to Schedule 40, XH, or Schedule 160 pipe, providing proper internal alignment at the butt-weld connection. Socket weld flanges receive the pipe outside diameter inside a machined socket and are secured using an external fillet weld.
Additional Class 300 Flange Styles
Class 300 A/SA105 flanges may also include slip-on, threaded, blind, reducing, and lap joint configurations, depending on piping system requirements. Raised-face and flat-face options may be available where applicable.
ASME B16.5 Flange Requirements
ASME B16.5 establishes applicable flange dimensions, bolt patterns, facing requirements, tolerances, and pressure-temperature ratings.
When ordering, verify nominal pipe size, Schedule 40, XH or Schedule 160 requirements, flange style, bore, facing, Class 300 rating, and A105/SA-105 material for proper industrial piping system compatibility.