Technical articles

Technical Articles

Practical engineering insights from our chemical cleaning and commissioning projects — VGB-S-513 compliant methods, field experience and technical guidance.

Published September 2026

Alkaline Boil-out vs. Acid Chemical Cleaning in Industrial Boilers

In industrial boiler commissioning and maintenance projects, alkaline boil-out and acid chemical cleaning (pickling) are often used interchangeably under the generic label "chemical cleaning." In practice, the two methods differ in solution pH, target contaminant types, circuit scope, and field infrastructure requirements.

Boil-outPicklingVGB-S-513Chemical CleaningPre-commissioning

Read article Download PDF

Published September 2026

Pre-Chemical Cleaning Flushing: Open Circuit or Filtered Circuit?

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

FlushingVGB-S-513Chemical CleaningHRSGPre-commissioning

Read article Download PDF