ASTM A350 LF2 Class 1 Long Weld Neck Flange Manufacturer specializes in high-performance carbon steel LWN flanges designed for demanding pressure applications. This 3/4 inch DN20 long weld neck flange features a 20 mm bore size, 600 LB pressure rating, PN100 class, and complies with ASME B16.5 standards. Manufactured from ASTM A350 LF2 Class 1 carbon steel, it offers excellent strength, toughness, and reliability in oil, gas, petrochemical, and industrial piping systems. With a 248 mm length and raised face (RF) design, this forged long weld neck flange ensures secure connections, enhanced sealing performance, and long service life under severe operating conditions.