Class 600 Forged Carbon Steel Weld Neck, Raised-Face Flange for Schedule 160 Pipe
Class 600 A105/SA-105 Weld Neck Flange for Schedule 160 Pipe
The Class 600 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 demanding heavy-wall industrial pressure piping systems. Combining forged carbon steel construction, a tapered weld neck, Schedule 160 bore, and raised-face sealing surface, this flange delivers excellent strength, alignment, and dependable long-term performance.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 600 weld neck flange provides 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 600 designation represents an ASME pressure class rather than a maximum working pressure of 600 PSI. Actual allowable pressure depends on material, operating temperature, flange size, 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 connecting pipe. The flange is butt welded directly to Schedule 160 pipe, producing a strong permanent joint while helping distribute mechanical and piping stresses through the tapered hub.
The flange bore can be machined to correspond with the Schedule 160 pipe wall thickness and inside diameter, helping provide accurate internal alignment at the butt-weld connection. Schedule 160 provides a heavier pipe wall and smaller inside diameter than lighter schedules for the same nominal pipe size.
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.
Manufactured to applicable ASME B16.5 requirements, these Class 600 forged carbon steel weld neck flanges provide standardized dimensions, facing requirements, and pressure-temperature ratings.
When ordering, verify nominal pipe size, Schedule 160 bore, Class 600 rating, raised-face configuration, A105/SA-105 material, ASME B16.5 requirements, gasket selection, and service conditions for reliable industrial piping performance.