This is a carbon steel weld neck flange made to ASME B16.5. It is produced from ASTM A105 forged material. The flange size is 200 mm, which equals 8 inches or DN200. It is rated for Class 150 LB, which equals PN20. The wall thickness matches SCH 40 pipe. It has a raised face for improved gasket sealing. The weld neck design provides a smooth transition from pipe to flange. This reduces stress concentration and turbulence. It is suited for high-pressure and high-temperature applications.