SPIRALTEC GASKET CO. Style WR & WRI to ASME B16.20 to suit ASME B16.5 flanges
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 | |