weld neck flange 10 Inch Class 900 Posted on February 11, 2017July 1, 2017 weld neck flange 10 Inch Class 900 Weld Neck Flange Class 900 Size NPS : 10″ Size DN : 250 mm. Weight : 118 kg. StudBolt Size : 1 3/8″ UNC Or (M36) x 235 Long No. of Bolts : 16 EA. Holes Diamater : 38.1 mm. [wpfilebase tag=file id=2118 /] 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