KHIA headerKnow-How in Action

VOL XXXII, NO 120

Belzona® 4301 Protects Flange Face From Sulfuric Acid

 
 

Industry:

Food & Drink (FOOD)

 
 

Application:

Valves, Pipes and Fittings (VPF)

 
 

Customer Location:

Pharmaceuticals Company, Scotland, UK

 
 

Application Date:

November 2016

 
 

Application Situation:

The loss of metal in a flange was causing significant leaks around the flange. This led to environmental and safety concerns.

 
 

Problem:

Cutting and welding was deemed to be unacceptable due to the damage that would be caused to the lining inside the nozzle and the safety concerns. A flange face and surrounding bolts had become corroded from contact with Sulphuric Acid. The loss of metal in the flange was causing significant leaks around the flange. This led to environmental and safety concerns.

 
 

Products:

Belzona 4301 (CR1 Hi-Build)

 

Substrate:

Mild Steel

 
 

Application Method:

The face was prepared using an MBX bristle blaster. A blank flange was used to form the face using a modified version of Belzona system leaflet VPF-13. Time was an issue so induction heaters were brought in to force cure the product. The cured product was machinined back once the former was removed.

 
 

Belzona Facts:

Cutting & welding the flange was not possible due to the safety implications it would have caused onsite. Replacement would have been more expensive, cause longer downtime and experience the same problems they had before.

 
 

Photographs Description

1 - Damaged flange face & bolts

2 - Flange prepared & profile checked

3 - Former bolted in position

4 - Former removed, bore dressed down & induction heat coil in place

 
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