A process for the removal of oxide scales and construction debris by mechanical drag forces. Methods employed:

• Db Min Steam Blowing
• Conventional Steam Blowing
• Air Blowing

Db Min Steam Blowing:

• Continuous steady state conditions
• Reduced noise level
• Optimised blow duration
• Blowing achieved at low pressure
• Steam flow requirement approximately 30% of maximum capacity

Conventional Steam Blowing:

• Transient steam conditions
• Higher noise level
• Longer blow duration and high number of blowing cycles
• Higher CFR can be achieved
• Steam lines subjected to high mechanical forces and thermal stress

Air Blowing:

• Discontinuous
• Air blowing cycles at high pressure
• Instantaneously creates high flow rates using a quick opening valve
• High drag forces giving very effective fluidisation of debris
• Considerable reduction of cleaning programme time and commissioning