Manual sampling systems are permanently installed systems that allow a sample cylinder to be installed and a specified volume of gas to be extracted into the cylinder for compositional analysis.
How it Works
Manual sampling systems are installed either as a standalone system or combined with an automatic sampling system.
Sampling systems extract a known sample of fluid through a fixed or retractable sample probe that is permanently installed into a flare line, this sample is then routed through isolation and flow control valves into a sample cylinder connected via flexible hoses.
Once the sample cylinder is full, the cylinder is isolated, removed and taken to a laboratory for analysis.
ISO 10715: Natural Gas – Sampling Guidelines.
API MPMS 8.1: Manual Sampling.
Point in time spot sample
Potential for non-representative samples to be taken
Relies on experience of technician taking the sample
Flare systems can operate at very low or even sub-atmospheric pressures making extraction of a manual sample difficult
No case study available at this time.
The method employed can be either a manual or automatic sampling system.