Tubing Pressure

Static vs dynamic.

Thanks, but could you explain it more specific?

Shut in (or blocked in) tubing pressure refers to a section of tubing that has been isolated via caps, plugs, valves, etc. If the tubing contains a cool liquid that later warms up, the liquid can expand hydrostatically and build up very large pressure. This is a notable issue with refrigerants, for instance.

Flowing tubing pressure means that the tubing is open (via valves, say) at one or both ends. Any liquid is thus not confined, and thus cannot produce hydrostatic pressure.

Thanks,

that is more clearer now. So, shut in pressure is higher than flowing pressure. Then, it can be assumed that piping pressure which transfer fluid (for ex: 3-phase) from tubing to production header/separator should be lower than flowing tubing pressure (if it can't said same). Please correct me if I'm wrong.

Thanks again

The fluid transfer pressure would be the same as flowing pressure. Unless there are some extreme temperature/pressure conditions, these will ordinarily be quite less than the possible trapped-liquid pressure.

Speaking again of refrigeration systems, there are procedures to ensure that liquid is removed from piping/tubing sections before closing all valves.