COMPANY HEADER
  • Class 300 Flanges
  • Class 300 Flanges - 2
  • Carbon steel to ASTM A 105.
  • SA 105 flanges can be supplied upon request.
  • Material of NPS 26 and up complies with ASTM A181 grades 1 and 2.
  • Flanges are: furnished, faced, drilled, spot faced or back faced.
1 - 25 of 27 | Results Per Page | View | Unit of Measure
1 2 
Request Information Compare Items

Item #

Item Name

Nominal Pipe Size

Outside Diameter of Flange O

Minimum Thickness of Flange Q

Diameter of Raised Face R

N/A 1/2 Inch (in) Nominal Pipe Size Class 300 Flange N/A 1/2 in N/A 3 3/4 in N/A 9/16 in N/A 1 3/8 in
N/A 3/4 Inch (in) Nominal Pipe Size Class 300 Flange N/A 3/4 in N/A 4 5/8 in N/A 5/8 in N/A 1 11/16 in
N/A 1 Inch (in) Nominal Pipe Size Class 300 Flange N/A 1 in N/A 4 7/8 in N/A 11/16 in N/A 2 in
N/A 1 1/4 Inch (in) Nominal Pipe Size Class 300 Flange N/A 1 1/4 in N/A 5 1/4 in N/A 3/4 in N/A 2 1/2 in
N/A 1 1/2 Inch (in) Nominal Pipe Size Class 300 Flange N/A 1 1/2 in N/A 6 1/8 in N/A 13/16 in N/A 2 7/8 in
N/A 2 Inch (in) Nominal Pipe Size Class 300 Flange N/A 2 in N/A 6 1/2 in N/A 7/8 in N/A 3 5/8 in
N/A 2 1/2 Inch (in) Nominal Pipe Size Class 300 Flange N/A 2 1/2 in N/A 7 1/2 in N/A 1 in N/A 4 1/8 in
N/A 3 Inch (in) Nominal Pipe Size Class 300 Flange N/A 3 in N/A 8 1/4 in N/A 1 1/8 in N/A 5 in
N/A 3 1/2 Inch (in) Nominal Pipe Size Class 300 Flange N/A 3 1/2 in N/A 9 in N/A 1 3/16 in N/A 5 1/2 in
N/A 4 Inch (in) Nominal Pipe Size Class 300 Flange N/A 4 in N/A 10 in N/A 1 1/4 in N/A 6 3/16 in
N/A 5 Inch (in) Nominal Pipe Size Class 300 Flange N/A 5 in N/A 11 in N/A 1 3/8 in N/A 7 5/16 in
N/A 6 Inch (in) Nominal Pipe Size Class 300 Flange N/A 6 in N/A 12 1/2 in N/A 1 7/16 in N/A 8 1/2 in
N/A 8 Inch (in) Nominal Pipe Size Class 300 Flange N/A 8 in N/A 15 in N/A 1 5/8 in N/A 10 5/8 in
N/A 10 Inch (in) Nominal Pipe Size Class 300 Flange N/A 10 in N/A 17 1/2 in N/A 1 7/8 in N/A 12 3/4 in
N/A 12 Inch (in) Nominal Pipe Size Class 300 Flange N/A 12 in N/A 20 1/2 in N/A 2 in N/A 15 in
N/A 14 Inch (in) Nominal Pipe Size Class 300 Flange N/A 14 in N/A 23 in N/A 2 1/8 in N/A 16 1/4 in
N/A 16 Inch (in) Nominal Pipe Size Class 300 Flange N/A 16 in N/A 25 1/2 in N/A 2 1/4 in N/A 18 1/2 in
N/A 18 Inch (in) Nominal Pipe Size Class 300 Flange N/A 18 in N/A 28 in N/A 2 3/8 in N/A 21 in
N/A 20 Inch (in) Nominal Pipe Size Class 300 Flange N/A 20 in N/A 30 1/2 in N/A 2 1/2 in N/A 23 in
N/A 22 Inch (in) Nominal Pipe Size Class 300 Flange N/A 22 in N/A 33 in N/A 2 5/8 in N/A 25 1/4 in
N/A 24 Inch (in) Nominal Pipe Size Class 300 Flange N/A 24 in N/A 36 in N/A 2 3/4 in N/A 27 1/4 in
N/A 26 Inch (in) Nominal Pipe Size Class 300 Flange N/A 26 in N/A 38 1/4 in N/A 3 1/8 in N/A 29 1/2 in
N/A 28 Inch (in) Nominal Pipe Size Class 300 Flange N/A 28 in N/A 40 3/4 in N/A 3 3/8 in N/A 31 1/2 in
N/A 30 Inch (in) Nominal Pipe Size Class 300 Flange N/A 30 in N/A 43 in N/A 3 5/8 in N/A 33 3/4 in
N/A 32 Inch (in) Nominal Pipe Size Class 300 Flange N/A 32 in N/A 45 1/4 in N/A 3 7/8 in N/A 36 in
1 - 25 of 27 | Results Per Page | View | Unit of Measure
1 2