Class 300 Hot Dipped Galvanized Forged Carbon Steel Lap Joint, Flat-Face Flange
Class 300 Hot-Dipped Galvanized A105/SA-105 Lap Joint Flat-Face Flange
The Class 300 ASTM A105 / ASME SA-105 ASME B16.5 Hot-Dipped Galvanized Forged Carbon Steel Lap Joint Flat-Face Flange provides a durable, corrosion-resistant connection for industrial piping systems. Combining forged carbon steel construction, a protective galvanized finish, and lap joint design, this flange offers convenient alignment and dependable performance in appropriate commercial and industrial applications.
ASTM A105 / ASME SA-105 Forged Carbon Steel
Manufactured from ASTM A105 / ASME SA-105 forged carbon steel, this Class 300 lap joint flange provides excellent mechanical strength, toughness, and durability. The hot-dipped galvanized zinc coating adds protection against atmospheric corrosion, moisture, humidity, and weather exposure, making the flange suitable for many indoor and outdoor piping installations.
The Class 300 designation represents an ASME pressure class rather than a maximum working pressure of 300 PSI. Actual allowable pressure depends on material, operating temperature, flange size, and applicable pressure-temperature ratings.
Lap Joint Flange Design
A lap joint flange is designed for use with a compatible stub end attached to the pipe. The backing flange remains free to rotate behind the stub end, allowing easier alignment of bolt holes during piping installation, maintenance, and system modifications.
Because the backing flange normally does not contact the process fluid, lap joint construction can provide flexibility in selecting compatible flange and stub-end materials.
Flat-Face Flange Construction
The lap joint flange has a flat-faced configuration that bears against the back of the stub end. The compatible stub end provides the gasket seating surface for the completed flanged connection.
Manufactured to applicable ASME B16.5 requirements, these Class 300 galvanized lap joint flanges provide standardized dimensions, bolt patterns, and pressure-temperature ratings.
When ordering, verify nominal pipe size, Class 300 rating, compatible stub end, A105/SA-105 material, hot-dip galvanized finish, ASME B16.5 dimensions, and service conditions for reliable industrial piping performance.