Research Article
Physicochemical and Vibration Analysis of Christmas Tree Four-Way Flange Failure under Fracturing Process
Table 3
Rockwell hardness test results.
| | Measuring position | 1 | 2 | 3 | 4 | 5 |
| | Four-way flange measurement results | 220 | 224 | 232 | 220 | 216 | | HBHLD | HBHLD | HBHLD | HBHLD | HBHLD | | Failure valve measurement results | 209 | 231 | 234 | 236 | 235 | | HBHLD | HBHLD | HBHLD | HBHLD | HBHLD | | Standard requirement | 197∼237 HBW |
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