8.6. Liquid sizing examples
8.6.1. Example one
| Given: | |
| Liquid | Water |
| Critical pressure (PC) | 3206.2 psia |
| Temperature | 250 °F |
| Upstream pressure (P1) | 314.7 psia |
| Downstream pressure (P2) | 104.7 psia |
| Specific gravity | 0.94 |
| Valve action | Flow-to-open |
| Line size | 4 in (Class 600) |
| Flow rate | 500 gpm |
| Vapor pressure (PV) | 30 psia |
| Kinematic viscosity (ν) | 0.014 cSt |
| Flow characteristic | Equal percentage |
Step 1: Calculate actual pressure drop using Eqn (8.3).
Step 2: Check for choked flow. Find FL using Table 8.5. Looking under “globe, flow-under,” find FL as 0.90. Next, ...
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