weld neck flange 8 Inch Class 2500 Posted on February 8, 2017July 1, 2017 weld neck flange 8 Inch Class 2500 Weld Neck Flange Class 2500 Size NPS : 8″ Size DN : 200 mm. Weight : 264 kg. StudBolt Size : 2″ UNC Or (M52) x 380 Long No. of Bolts : 12 EA. Holes Diamater : 53.975 mm. [wpfilebase tag=file id=2083 /] ansi b16 5 ansi flange dimensions ansi flanges asme b16 5 Class 2500 flange dimensions raised face flange Weld Neck Flange weld neck flange Class 2500