During Fabrication of piping is under progress during hot working days, an oxide layer is formed on the inside surface of pipes. This layer is known as mill scale and this must be removed from the system before start-up of the system for service.

Cleaning by steam blowing is carried out essentially for steam piping networks on HRSG’s due to the problem of condensation of steam or draining of condensate.

During the start-up of any plant, there is a possibility of the particles left in the piping from the construction phase could travel downstream damaging instrumentation and other critical components of the system.