Class 1500 Forged Carbon Steel Threaded, Raised-Face Flange
Class 1500 A/SA105 Forged Carbon Steel Threaded Raised-Face Flange
The Class 1500 ASME A/SA105 Forged Carbon Steel Threaded Raised-Face Flange manufactured to ASME B16.5 provides a heavy-duty threaded connection for demanding high-pressure industrial piping systems. Combining forged carbon steel strength, precision-machined internal threads, and a raised-face sealing surface, this flange provides reliable performance where a threaded pipe-to-flange connection is required.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 1500 threaded flange provides excellent mechanical strength, toughness, and durability. A/SA105 is widely specified for pressure-containing piping components used in oil and gas, petroleum refining, petrochemical processing, chemical plants, power generation, manufacturing, utilities, and high-pressure industrial process piping systems.
Class 1500 Threaded Flange Design
A threaded flange incorporates internal pipe threads designed to connect directly to compatible externally threaded pipe. Unlike weld neck or socket weld flanges, the pipe-to-flange connection does not require welding. This can make threaded flanges useful for installations where welding is restricted, impractical, or undesirable.
Thread type, pipe material, nominal pipe size, service temperature, and pressure requirements should always be verified for the intended piping application.
The Class 1500 designation represents an ASME pressure class rather than a maximum working pressure of 1500 PSI. Actual allowable pressure depends on material, flange size, operating temperature, and applicable pressure-temperature ratings.
Raised-Face Flange Construction
The raised-face (RF) design provides an elevated gasket seating surface that concentrates bolting force over the gasket area, helping establish a dependable seal with a compatible mating flange and properly selected gasket.
ASME B16.5 Flange Requirements
ASME B16.5 establishes applicable requirements for flange dimensions, facings, bolt patterns, tolerances, and pressure-temperature ratings.
When ordering a Class 1500 A/SA105 threaded raised-face flange, verify nominal pipe size, thread requirements, Class 1500 rating, A/SA105 material, raised-face configuration, ASME B16.5 requirements, gasket selection, bolting, and service conditions.