Flanges.IO
Flange Dimensions
Dimensional reference tables, weight charts, and engineering tools for all flange standards.
Flanges.IO provides a complete library of flange dimension tables covering ASME, ANSI, API, and AWWA standards. Use these reference materials for engineering design, procurement specifications, and field verification.
Dimensional Standards
NPS 1/2 through 24, Classes 150-2500
NPS 26 through 60, MSS SP-44 (heavier series)
NPS 26 through 60, API 605 (lighter series)
Class 125 and 250 cast iron pipe flanges
Orifice flanges for flow measurement
Waterworks flanges, Class B through F
Specialty Flanges
Reducing and nozzle connection flanges
Extended hub flanges per MSS SP-97
Figure-8 blinds, spades, and spacer rings
Self-reinforcing branch connections
Reference Tools
API 6A pressure-temperature ratings
Bolt sizes, quantities, and stud lengths
Standard bore dimensions by pipe size
Minimum flange thickness by class
RF, FF, RTJ, T&G, M&F configurations
Approximate weights by type and class
Ring groove specifications and tolerances
