Class 150 Forged Carbon Steel Weld Neck, Raised-Face Flange for Schedule 40 Pipe
Class 150 A105/SA-105 Weld Neck Flange for Schedule 40 Pipe
The Class 150 ASTM A105/ASME SA-105 Forged Carbon Steel Weld Neck Raised-Face Flange for Schedule 40 Pipe provides a strong, permanent connection for industrial pressure piping systems. Featuring forged carbon steel construction, a tapered weld neck, Schedule 40 bore, and raised-face sealing surface, this flange delivers dependable strength and long-term performance in demanding piping applications.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 150 weld neck flange provides excellent mechanical strength, toughness, and durability. A105/SA-105 is widely specified for pressure-containing components used in oil and gas, petrochemical processing, refineries, power generation, chemical processing, manufacturing, utilities, and industrial process piping systems.
The Class 150 designation identifies an ASME pressure class rather than a maximum working pressure of 150 PSI. Actual allowable pressure depends on material, operating temperature, and applicable pressure-temperature ratings.
Weld Neck Design for Schedule 40 Pipe
A weld neck flange incorporates a long tapered hub that provides a gradual transition between the flange body and connecting pipe. The flange is butt welded directly to Schedule 40 pipe, producing a strong permanent joint while helping distribute mechanical and piping stresses through the tapered hub.
The flange bore is machined to correspond with the Schedule 40 pipe wall thickness and inside diameter, helping provide proper internal alignment and a smooth transition through the welded connection.
Raised-Face Flange Construction
The raised-face (RF) flange features an elevated gasket seating surface surrounding the bore. Concentrating bolting force over this gasket area helps establish a dependable seal between compatible mating flanges.
Class 150 A105/SA-105 weld neck flanges are commonly manufactured to applicable ASME B16.5 dimensional and pressure-temperature requirements.
When ordering, verify nominal pipe size, Schedule 40 bore, Class 150 rating, raised-face configuration, A105/SA-105 material, dimensions, and service conditions for proper piping system compatibility.