What is a likely consequence if purging a sampling line is not performed?

What is a likely consequence if purging a sampling line is not performed?

• A. Sample is not representative.
• B. Sample becomes more accurate.
• C. Purging has no effect.
• D. Moisture in the line is reduced.

Answer: (A)

Purging a sampling line clears out stale fluid, air, floating particulates, and moisture so that the sample drawn actually reflects the current process conditions. If you don’t purge, the sample is likely coming from a dead leg or from residual contents in the line rather than the true process stream, which makes the sample biased and not representative of what’s happening in the process. That’s why the most likely consequence is that the sample is not representative. Purging does affect accuracy, and it helps reduce moisture in the line; without purging, moisture may remain and skew the results.

Purging a sampling line clears out stale fluid, air, floating particulates, and moisture so that the sample drawn actually reflects the current process conditions. If you don’t purge, the sample is likely coming from a dead leg or from residual contents in the line rather than the true process stream, which makes the sample biased and not representative of what’s happening in the process. That’s why the most likely consequence is that the sample is not representative. Purging does affect accuracy, and it helps reduce moisture in the line; without purging, moisture may remain and skew the results.