5 Sampling Available to Purchase

Successful control of boiler system water chemistry requires that meaningful and representative samples be acquired at various points throughout the boiler system. Samples and∕or sample points must meet the specific requirements (e.g. flow, temperature, velocity) of the individual tests or the continuous analyzers that utilize them. They must also allow the user to acquire samples in a safe manner; e.g. provide cooling as necessary, route the sample to a protected area, etc.

Recommended sample points for make-up, feedwater, blowdown, steam, and condensate are shown in Figures 1 and 2. Locations are included for both grab samples and continuous analyzers. Systems operating with high purity make-up typically have additional and more stringent sampling requirements.