KHIA headerKnow-How in Action

VOL XXVIII, NO 100

Belzona® Repairs Corroded Tanks

 
 

Industry:

Mining and Quarrying (MINQ)

 
 

Application:

Tanks and Chemical Containment Areas (TCC)

 
 

Customer Location:

Aggregate Manufacturer, Chelmsford

 
 

Application Date:

July 2014

 
 

Application Situation:

Storage tanks for molten bitumen

 
 

Problem:

The tanks have a sensor on top for flow and level readings. They sit on an upstand with a bolted flange. The upstands had been eaten away by the corrosive fumes from the hot bitumen. They were holed through and the gases from the tanks were venting to the atmosphere.

 
 

Products:

Belzona 1161 (Super UW-Metal)
Belzona 1111 (Super Metal)

 

Substrate:

Mild Steel

 
 

Application Method:

The repairs were carried out in accordance with Belzona System Leaflet TCC-1. After preparing the corroded substrate, bridging tape was applied to spanthe holes so that product did not fall into the tanks. Three 4mm steel plates were bonded around each upstand before overwrapping with further Belzona incorporating Reinforcement tape.

 
 

Belzona Facts:

It was not possible to carry out any welding due to the explosion risk. Belzona offered the required level of heat and chemical resistance to the corrosive fumes. The only other option was to replace all the tank lids but this would have incurred a tremendous cost.

 
 

Photographs Description

1 & 2. Views showing the degree of corrosion present 3 & 4. Completed applications

 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com