weld neck flange 3 Inch Class 900 Posted on February 11, 2017July 1, 2017 weld neck flange 3 Inch Class 900 Weld Neck Flange Class 900 Size NPS : 3″ Size DN : 80 mm. Weight : 14 kg. StudBolt Size : 7/8″ UNC Or (M24) x 145 Long No. of Bolts : 8 EA. Holes Diamater : 25.4 mm. [wpfilebase tag=file id=2113 /] ansi b16 5 ansi flange dimensions ansi flanges asme b16 5 Class 900 flange dimensions raised face flange Weld Neck Flange weld neck flange Class 900