Pressure Classes
Pressure ratings for both grooved and shouldered joint pipe are determined by the couplings. For more information on pressure capabilities, please consult the manufacturer’s website at Victaulic.com.
Grooved Joint Pipe
| Size (in.) |
OD |
T1 Nominal Wall Thickness |
Coupling Max. Working Pressure (psi) |
|---|---|---|---|
| 4 | 4.8 | 0.32 | 350 |
| 6 | 6.9 | 0.34 | 350 |
| 8 | 9.05 | 0.36 | 350 |
| 10 | 11.1 | 0.38 | 350 |
| 12 | 13.2 | 0.4 | 350 |
| 14 | 15.3 | 0.42 | 250 |
| 16 | 17.4 | 0.43 | 250 |
| 18 | 19.5 | 0.44 | 250 |
| 20 | 21.6 | 0.45 | 150 |
| 24 | 25.8 | 0.47 | 150 |
| 302 | 32 | 0.51 | 150 |
| 362 | 38.3 | 0.58 | 150 |
1.) Minimum nominal wall thickness of centrifugally cast ductile iron pipe furnished with grooved joint. Thicknesses above correspond to special thickness class 53 for all sizes.
2.) 30" and 36" sizes are not included in AWWA C606. For tolerances see AWWA C606.
Shouldered Joint Pipe
| Size (in.) |
T Minimum Wall Thickness3 |
OD | Coupling Max. Working Pressure (psi) |
|---|---|---|---|
| 18 | 0.31 | 19.5 | 175 |
| 20 | 0.33 | 21.6 | 175 |
| 24 | 0.33 | 25.8 | 175 |
| 30 | 0.34 | 32 | 175 |
| 36 | 0.38 | 38.3 | 175 |
| 42 | 0.41 | 44.5 | 175 |
| 48 | 0.46 | 50.8 | 175 |
| 54 | 0.51 | 57.56 | 175 |
| 60 | 0.54 | 61.61 | 90 |
| 60 | 0.54 | 61.61 | 175 |
| 644 | 0.56 | 65.67 | 90 |
3.) Minimum pipe barrel wall thickness using minimum pressure class pipe in combination with welded steel end rings.
4.) 66" couplings are used with 64" pipe.