In power stations it has been the practice to purge newly erected steam pipework of debris by blowing through steam at a higher rate than in normal operation. The cost of providing sufficient steam from temporary boilers can be high in some cases. This paper presents the results of a study of water flushing as a method of removing debris from pipework. The minimum necessary water velocity for varying pipe sizes can be calculated, data are given for purge time and pipework configurations are examined.
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