Chapter 1
Routine Tube Sampling for Cleanliness Assessments


As a general rule, routine tube sampling is employed to assess the condition and cleanliness of tubes which are filled with steam/water mixtures during service. The primary objectives of routine tube sample collection are to measure the internal deposit weight per unit area and determine the deposit composition. This information is used to determine if a cleaning is required and can be used to assess the performance of the feedwater and boiler water treatment programs.

  • Sampling Frequency
  • Tube Sample Location for Routine Evaluation
  • Initial Deposit Weight Survey for Units with No Tube Sampling History
  • Deposit Analyses
  • Multiple Tube Samples

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