Controlling fugitive emissions in sampling: Why closed-loop systems matter

Well-designed, closed-loop sampling systems can limit fugitive emissions, while reducing the risk to sampling system technicians by keeping process fluids fully contained, writes Matt Dixon

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UNINTENTIONAL release of emissions into the atmosphere can occur at various locations throughout refineries or chemical plants.

And due to increasingly stringent regulatory measures across the globe, there has never been more pressure on plant operators to reduce, if not outright eliminate, these fugitive emissions.

Reaching net-zero emissions is a formidable challenge. Certain applications may require significant rework of major process infrastructure, but elsewhere, there are more attainable solutions.

For example, consider the dozens of grab sampling (or spot sampling) points that may exist throughout a major facility.

Depending on your sampling procedures, the quality of the sampling system design, and the operating technician's skill level, each of these points represents potential for leaks.

This potential exists in the form of spillage when sample containers are released or leaks if sampling systems are constructed sub-optimally or with substandard components.

The good news is that fixing leaks and stopping fugitive emissions in sampling systems can be relatively simple and cost-effective.

WHAT IS A CLOSED-LOOP SAMPLING SYSTEM?

Reducing emissions in any chemical or hydrocarbon process fundamentally involves keeping fluids and gases contained within the system. A closed-loop sampling system, when designed and constructed correctly, does exactly that.

Closed-loop systems draw in process fluid and flow it through the sampling point where a portion of it (the sample) is collected in a sealed container (a cylinder or bottle).