Discover top-quality Long Weld Neck Flanges from a leading manufacturer in China. Available in various specifications including 4 Inch, DN100, 900 LB, and PN150, conforming to ASME B16.5 standards with ASME SA105 and ASTM A105 materials. Featuring SCH STD and a length of 190 MM, these flanges are designed for RF End connections. Upgrade your industrial projects with reliable and precision-engineered flange solutions.