SPIRALTEC GASKET CO.
For Style WRI, see section for “Inner Ring Dimensions” In accordance with ASME B16.20, Inner Rings are mandatory for the following flange designations: Class 900- NPS 24 to 48 Class 1500 – NPS 12 to NPS 24 Class 2500 – NPS 4 to NPS 12 Style WR & WRI to ASME B16.20 To Suit ASME B16.50 Flanges Gasket Dimensions
| Outside Diameter of Sealing Element | Over all Gasket size ID (inside sealing ring) x OD (outer diameter of centering ring) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Nom. Pipe Size | Class 150/300 400, 600 | Class 900/1500 2500 | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
| ½ | 1 ¼ | 1 ¼ | ¾ x 1 ⅞ | ¾ x 2 | ¾ x 2 ½ | ¾ x 2 ¾ | |||
| ¾ | 1 9/16 | 1 9/16 | 1 x 2 ¼ | 1 x 2 ⅝ | 1 x 2 ¾ | 1 x 3 | |||
| 1 | 1 ⅞ | 1 ⅞ | 1 ¼ x 2 ⅝ | 1 ¼ x 2 ⅞ | 1 ¼ x 3 ⅛ | 1 ¼ x 3 ⅜ | |||
| 1 ¼ | 2 ⅜ | 2 ⅜ | 1 ⅞ x 3 | 1 ⅞ x 3 ¼ | 1 9⁄16 x 3 ½ | 1 9⁄16 x 4 ⅛ | |||
| 1 ½ | 2 ¾ | 2 ¾ | 2 ⅛ x 3 ⅜ | 2 ⅛ x 3 ¾ | 1 7⁄8 x 3 ⅞ | 1 ⅞ x 4 ⅝ | |||
| 2 | 3 ⅜ | 3 ⅜ | 2 ¾ x 4 ⅛ | 2 ¾ x 4 ⅜ | 2 5⁄16 x 5 ⅝ | 2 5⁄16 x 5 ¾ | |||
| 2 ½ | 3 ⅞ | 3 ⅞ | 3 ¼ x 4 ⅞ | 3 ¼ x 5 ⅛ | 2 ¾ x 6 ½ | 2 ¾ x 6 ⅝ | |||
| 3 | 4 ¾ | 4 ¾ | 4 x 5 ⅜ | 4 x 5 ⅞ | 3 ¾ x 6 ⅝ | 3 ⅝ x 6 ⅞ | 3 ⅝ x 7 ¾ | ||
| 3 ½ | 5 ¼ | 5 ¼ | 4 ½ x 6 ⅜ | 4 ½ x 6 ½ | 4 ⅛ x 6 ⅜ | 4 ⅛ x 7 ½ | 4 ⅛ x 7 ⅜ | ||
| 4 | 5 ⅞ | 5 ⅞ | 5 x 6 ⅞ | 5 x 7 ⅛ | 4 ¾ x 7 | 4 ¾ x 7 ⅝ | 4 ¾ x 8 ⅛ | 4 ⅝ x 8 ¼ | 4 ⅝ x 9 ¼ |
| 5 | 7 | 7 | 6 ⅛ x 7 ¾ | 6 ⅛ x 8 ½ | 5 13⁄16 x 8 ⅜ | 5 13⁄16 x 9 ½ | 5 13⁄16 x 9 ¾ | 5 ⅝ x 10 | 5 ⅝ x 11 |
| 6 | 8 ¼ | 8 ¼ | 7 3⁄16 x 8 ¾ | 7 3⁄16 x 9 ⅞ | 6 ⅞ x 9 ¾ | 6 ⅞ x 10 ½ | 6 ⅞ x 11 ⅜ | 6 ¾ x 11 ⅛ | 6 ¾ x 12 ½ |
| 8 | 10 ⅜ | 10 ⅛ | 9 3⁄16 x 11 | 9 3⁄16 x 12 ⅛ | 8 ⅞ x 12 | 8 ⅞ x 12 ⅝ | 8 ¾ x 14 ⅛ | 8 ½ x 13 ⅞ | 8 ½ x 15 ¼ |
| 10 | 12 ½ | 12 ¼ | 11 3⁄16 x 13 ⅜ | 11 5⁄16 x 14 ¼ | 10 13⁄16 x 14 ⅛ | 10 13⁄16 x 15 ¾ | 10 ⅞ x 17 ⅛ | 10 ½ x 17 ⅛ | 10 ⅝ x 18 ¾ |
| 12 | 14 ¾ | 14 ¼ | 13 ⅜ x 16 ⅛ | 13 3⁄8 x 16 ⅝ | 12 ⅞ x 16 ½ | 12 ⅞ x 18 | 12 ¾ x 19 ⅝ | 12 ¾ x 20 ½ | 12 ½ x 21 ⅝ |
| 14 | 16 | 15 ¾ | 14 ⅝ x 17 ¾ | 14 ⅝ x 19 ⅛ | 14 ¼ x 19 | 14 ¼ x 19 ⅜ | 14 x 20 ½ | 14 ¼ x 22 ¾ | |
| 16 | 18 ¼ | 18 | 16 ⅝ x 20 ¼ | 16 ⅝ x 21 ¼ | 16 ¼ x 21 ⅛ | 16 ¼ x 22 ¼ | 16 ¼ x 22 ⅝ | 16 x 25 ¼ | |
| 18 | 20 ¾ | 20 ½ | 18 11⁄16 x 21 ⅝ | 18 11⁄16 x 23 ½ | 18 ½ x 23 ⅜ | 18 ½ x 24 ⅛ | 18 ¼ x 25 ⅛ | 18 ¼ x 27 ¾ | |
| 20 | 22 ¾ | 22 ½ | 20 11⁄16 x 23 ⅞ | 20 11⁄16 x 25 ¾ | 20 ½ x 25 ½ | 20 ½ x 26 ⅞ | 20 ½ x 27 ½ | 20 ¼ x 29 ¾ | |
| 24 | 27 | 26 ¾ | 24 ¾ x 28 ¼ | 24 ¾ x 30 ½ | 24 ¾ x 30 ¼ | 24 ¾ x 31 ⅛ | 24 ¾ x 33 | 24 ¼ x 35 ½ | |