weld neck flange 2 Inch Class 1500 Posted on February 10, 2017July 1, 2017 weld neck flange 2 Inch Class 1500 Weld Neck Flange Class 1500 Size NPS : 2″ Size DN : 50 mm. Weight : 11.4 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=2092 /] ansi b16 5 ansi flange dimensions ansi flanges asme b16 5 Class 1500 flange dimensions raised face flange Weld Neck Flange weld neck flange Class 1500