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Pre-Chemical Cleaning Flushing: Open Circuit or Filtered Circuit?
Comparative evaluation of pre-operational flushing practices in accordance with VGB-S-513 and field experience
Published September 2026
FlushingVGB-S-513Chemical CleaningHRSGPre-commissioning
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High-velocity water flushing applied before chemical cleaning in commissioned boilers, Waste Heat boilers and associated pipework is a critical step that determines the technical quality of the remainder of the project. VGB-S-513 defines flushing as the "first unrenouncable step." Similarly, the ASM
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Full article with company letterhead and figures (PDF).