Class 150 Class 300 Class 600 1/2 Inch 1 Inch 1-1/4 Inch 1-1/2 Inch 2 Inch 2-1/2 Inch ASME B16.34 BS 5352
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| Class | NPS(in) | 1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | 21/2 |
| 150 | D | 10 | 13 | 19.1 | 21 | 31.8 | 38.1 | 48.5 |
| 300 | ||||||||
| 600 | ||||||||
| 150 | L | 108 | 117 | 127 | 140 | 165 | 203 | 216 |
| 300 | 152 | 178 | 203 | 216 | 229 | 267 | 292 | |
| 600 | 165 | 190 | 216 | 229 | 241 | 292 | 330 | |
| 150 | H | 158 | 163 | 193 | 250 | 250 | 291 | 350 |
| 300 | ||||||||
| 600 | ||||||||
| 150 | W | 100 | 100 | 125 | 160 | 160 | 180 | 240 |
| 300 | ||||||||
| 600 | ||||||||
| 150 | kg | 4.5 | 6.9 | 9.8 | 13.5 | 19.5 | 28.0 | 35.4 |
| 300 | 4.8 | 7.7 | 11.0 | 16.8 | 21.2 | 32.6 | 38.0 | |
| 600 | 5.6 | 7.8 | 12.5 | 17.0 | 23.5 | 38.8 | 42.6 |