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VOL XVIII, NO 38

‘Isolation’ Problems Solved With Belzona

 
 

Industry:

Oil & Gas (OILG)

 
 

Application:

Valves, Pipes and Fittings (VPF)

 
 

Customer Location:

Engineering Consultants - UK Oil & Gas Industry

 
 

Application Date:

March 2002

 
 

Application Situation:

Isolation spools for titanium cooler

 
 

Problem:

Installation of a titanium cooler offshore, into a steel pipework system, increased the possibility of galvanic corrosion between the two dissimilar metals. The traditional approach involves the installation of rubber lined isolation spools adjacent to the cooler. However, in this instance the elevated operating temperature increased the likelihood that the rubber would disbond, a commonly found problem, so an alternative was sought.

 
 

Products:

Belzona® 1391 (Ceramic HT Metal)

Belzona® 1591 (Ceramic XHT Metal)

 

Substrate:

Steel and stainless steel.

 
 

Application Method:

Belzona® 1391 and Belzona® 1591 were applied to the internal surface of each of the spools in accordance with Belzona Know-How System Leaflet VPF-2. To eliminate the possibility of defects, which would allow very rapid corrosion, the coating materials were applied as two coat systems. Immediately following application of the second coat, the flange faces were reformed according to Belzona Know-How System Leaflet VPF-13.

 
 

Belzona Facts:

A total of four flange pipespools were coated and the flange faces reformed using this process. Subsequent inspection some 12 months later revealed the pipespools to be in perfect condition.

 
 

Photographs Description

  1. Pipespool grit blasted and ready for coating
  2. Following coating and removal of the former ready for dressing
  3. Post pressure test awaiting despatch to customer
 
 
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For more information about Belzona visit: www.belzona.com