| Nominal
Pipe Size (Inch) |
Standard
Slot Spacing |
Maximum
Rows Around |
Average Slot |-Length-| |
| 1/8 | .185 | 2 | .375 |
|---|---|---|---|
| 1/4 | .185 | 2 | .469 |
| 3/8 | .185 | 2 | .625 |
| 1/2 | .185 | 2 | .750 |
| 3/4 | .185 | 2 | .875 |
| 1 | .185 | 3 | 1.125 |
| 1 1/4 | .185 | 3 | 1.188 |
| 1 1/2 | .185 | 3 | 1.313 |
| 2 | .185 | 4 | 1.438 |
| 3 | .185 | 5 | 1.625 |
| 4 | .185 | 6 | 1.750 |
| 5 | .185 | 7 | 1.750 |
| 6 | .185 | 9 | 1.813 |
| 8 | .250 | 8 | 2.750 |
| 10 | .250 | 8 | 3.000 |
| 12 | .250 | 10 | 3.000 |
| 14 | .250 | 11 | 3.000 |
| 16 | .250 | 12 | 3.000 |
| 18 | .250 | 14 | 3.000 |
| 20 | .250 | 15 | 3.000 |
| 24 | .250 | 18 | 3.00 |