Blind Flange Blind Flange, ANSI Class 300 – Coastal Flanges April 10, 2021 Posted by PipeAdmin 10 Apr Nominal Pipe Size (NPS): 1/23/411-1/41-1/222-1/233-1/245681012141618202224 Outside Diameter (O): 3.75 Thickness (T): 0.56 Raised Face Diameter (R): 1.38 Approximate Weight (lbs): 2 Bolt Circle (C): 2.63 Number of Holes: 4 Diameter of Holes: 0.63 [hoops name=”footer-coastal-flange-contact”]