Compression, Tension & Reversal Analysis per API 618
| Parameter | Formula |
|---|---|
| Head End Area | AHE = ฯ ร Dยฒ/4 |
| Crank End Area | ACE = ฯ ร (Dยฒ - dยฒ)/4 |
| Tension Load | Ft = Pd ร AHE - Ps ร ACE |
| Compression Load | Fc = Pd ร ACE - Ps ร AHE |
Understand rod load calculations, reversal requirements, and frame load limits
Rod load is the force acting on the piston rod during compression and tension strokes, which must stay within the compressor frame's rated limits.
Rod reversal is the alternation between compression and tension loads on the piston rod each stroke, required to ensure proper crosshead pin lubrication per API 618.
It calculates compression and tension rod loads, verifies rod reversal occurs, and checks that loads are within the compressor frame load limits per API 618.