TABLE 2.
The calculated time to achieve the specified number of decimal reductionsa
| No. of decimal reductions | Time (min) required at indicated pressure (MPa)
|
||||||
|---|---|---|---|---|---|---|---|
| 250 | 300 | 400 | 450 | 500 | 600 | 700 | |
| 1 | 22.9 | 6.4 | 3.7 | 1.2 | 0.95 | 0.15 | 0.052 |
| 2 | 91.7 | 25.6 | 14.7 | 4.9 | 3.8 | 0.60 | 0.21 |
| 3 | 206.3 | 57.6 | 33.0 | 11.1 | 8.6 | 1.4 | 0.47 |
| 4 | 366.6 | 102.4 | 58.7 | 19.7 | 15.2 | 2.4 | 0.83 |
| 5 | 572.9 | 160.0 | 91.7 | 30.8 | 23.8 | 3.8 | 1.3 |
| 5b | 114.6 | 32 | 18.3 | 6.2 | 4.8 | 0.75 | 0.26 |
a
The time to achieve one decimal reduction has been calculated from D1 = 1.342/k2, using the values of k(min−0.5) from Table 1. Subsequent times are calculated using the fact that the time for n decimal reductions is n2D1.
b
Values represent the time to reach five decimal reductions with the same values of D1 and assuming that this was then constant (i.e., time = 5D1).