Analysis of process steam and condensate are important aspects of any chemical processing or refining operation. Impurities in these systems such as silica, sodium, and chloride, or deviations from target pH values, can wreak havoc on a plant’s operations. Online analyses of parameters such as pH and cation conductivity are commonly performed to monitor the condition of process water and steam.
In order to achieve accurate analysis, EPRI, ASTM and ASME recommend cooling of water samples to 77°F (25°C) to ensure consistent, accurate analysis. Unfortunately, cooling water temperatures in process plants commonly exceed 100°F (38°C). While this is acceptable to provide rough cooling, it is insufficient to properly cool samples for online pH, cation conductivity or similar analyzers.