Class 150 Forged Carbon Steel Weld Neck, Raised-Face Flange for Schedule 160 Pipe
Class 150 A105/SA-105 Weld Neck Flange for Schedule 160 Pipe
The Class 150 ASTM A105/ASME SA-105 ASME B16.5 Forged Carbon Steel Weld Neck Raised-Face Flange for Schedule 160 Pipe provides a strong, permanent connection for heavy-wall industrial piping systems. Its forged carbon steel construction, tapered weld neck, Schedule 160 bore, and raised-face design provide dependable strength, alignment, and sealing performance.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 150 weld neck flange offers excellent mechanical strength, toughness, and durability. A105/SA-105 is commonly specified for pressure-containing piping components used in oil and gas, petrochemical processing, refineries, power generation, chemical processing, manufacturing, utilities, and industrial process piping.
The Class 150 designation represents an ASME pressure class, not 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 160 Pipe
A weld neck flange features a long tapered hub that creates a gradual transition between the flange body and pipe. The flange is butt welded directly to Schedule 160 pipe, producing a strong permanent joint while helping transfer mechanical stresses through the tapered hub.
The flange bore is selected to correspond with the Schedule 160 pipe wall thickness and inside diameter, helping provide proper internal alignment at the butt-weld connection. Schedule 160 has a heavier wall than lower pipe schedules for the same nominal pipe size.
Raised-Face Flange Construction
The raised-face (RF) flange incorporates an elevated gasket seating surface surrounding the bore. This concentrates bolting force over the gasket area to help establish a reliable seal between compatible mating flanges.
Manufactured to applicable ASME B16.5 requirements, these flanges provide standardized dimensions and pressure-temperature ratings.
When ordering, verify nominal pipe size, Schedule 160 bore, Class 150 rating, raised-face configuration, A105/SA-105 material, and ASME B16.5 requirements for proper piping system compatibility.