Class 1500 Forged Carbon Steel Blind, Raised-Face Flange
Class 1500 A/SA105 Forged Carbon Steel Blind Raised-Face Flange
The Class 1500 ASME A/SA105 Forged Carbon Steel Blind Raised-Face Flange manufactured to ASME B16.5 provides a heavy-duty solution for closing and isolating demanding high-pressure industrial piping systems. Its solid forged construction and raised-face sealing surface deliver exceptional strength, durability, and dependable sealing performance for critical process piping applications.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 1500 blind flange offers excellent mechanical strength, toughness, and long-term 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 Blind Flange Design
A blind flange has no center bore and is designed to close the end of a flanged piping system, valve connection, pressure vessel nozzle, or unused equipment opening. The solid construction creates a secure pressure boundary while maintaining a removable bolted connection.
Blind flanges provide convenient access for system isolation, pressure testing, inspection, cleaning, maintenance, piping modifications, and future system expansion.
The Class 1500 designation identifies 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 features an elevated gasket seating surface that concentrates bolting force over the gasket area. When used with a compatible mating flange and properly selected gasket, this design helps establish a reliable seal for demanding pressure piping service.
ASME B16.5 Flange Requirements
ASME B16.5 establishes applicable requirements for flange dimensions, facing dimensions, bolt patterns, tolerances, and pressure-temperature ratings.
When ordering a Class 1500 A/SA105 blind raised-face flange, verify nominal pipe size, Class 1500 rating, A/SA105 material, raised-face configuration, ASME B16.5 requirements, gasket selection, bolting, operating temperature, and service conditions.