| CASING DIAMETER (INCH | ||||||||||||
| 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 30 | ||
| 0-100 | 12 | 12 | 12 | 10 | 10 | 8 | 8 | 8 | 8 | 8 | 3/16 | |
| D | 100-200 | 12 | 12 | 10 | 8 | 8 | 8 | 3/16 | 3/16 | 3/16 | 3/16 | 1/4 |
| E | 200-300 | 10 | 10 | 8 | 8 | 8 | 3/16 | 3/16 | 3/16 | 1/4 | 1/4 | 1/4 |
| P | 300-400 | 10 | 8 | 8 | 3/16 | 3/16 | 3/16 | 1/4 | 1/4 | 1/4 | 1/4 | 5/16 |
| T | 400-600 | 10 | 8 | 3/16 | 3/16 | 3/16 | 1/4 | 1/4 | 1/4 | 5/16 | 5/16 | 5/16 |
| H | 600-800 | 3/16 | 3/16 | 3/16 | 3/16 | 1/4 | 1/4 | 1/4 | 5/16 | 5/16 | 3/8 | 3/8 |
| 800+ | 3/16 | 3/16 | 3/16 | 1/4 | 1/4 | 1/4 | 5/16 | 5/16 | 3/8 | 3/8 | 7/16 | |
| SUGGESTED | MIINIMUM THICKNESS FOR STEEL WATER CASING (GAUGES AND INCHES) | |||||||||||