KHIA headerKnow-How in Action


Belzona® Superwrap II Meets Gas Pipeline Operator Requirements



Oil & Gas (OILG)



Ships and Offshore Structures (SOS)


Customer Location:

Gulf of Mexico


Application Date:

October 2015


Application Situation:

20" Gas Pipeline Riser on Offshore Production Platform



External corrosion led to a through-wall defect causing the platform to be termporarily shut down. The operator required a permanent repair compliant with DOT Standards. Traditional repairs required fabrication, causing extended downtime and production loss.



Belzona 9611 (ES-Metal) - (previously named 1291)

Belzona 1161 (Super UW-Metal)

Belzona 1982 (SuperWrap II)

Belzona 9381 (Reinforcement Sheet)

Belzona 9382 (Release Film)

Belzona 9111 (Cleaner Degreaser)



Carbon Steel


Application Method:

The repair area was very close to the waterline and had to be protected from wave action. Also, the application had to be completed at low tide. The riser was out of service, but there was some seepage from the through-wall defect and Belzona 1291 was used to plug the hole, allowing for a dry surface during blasting and application. Abrasive blast with angular grit was used to clean the surface to the requirements of SSPC SP-10 (Near White Metal) with an average anchor profile of at least 3 mils. Belzona 9111 was used to clean nnd remove all surface contaminants. Because of occasional spray and moisture in the area, Belzona 1161 was used to fill pits and level surface irregularities. Belzona 9381 was saturated with Belzona 1982 and applied in 4 wraps (8 layers) in compliance with the engineered design. Belzona 9382 was installed to consolidate the repair during the curing process and removed once the system was cured.


Belzona Facts:

The SuperWrap II met the asset owner's requirements for a DOT Compliant repair. The overall process was completed in less time than alternative repair methods, reducing downtime and loss of production, making this system more cost effective.


Photographs Description

  1. Riser with defects indicated.
  2. Belzona 1291 plug and surface profile after blast.
  3. Skim coat of Belzona 1161 for pit filling and leveling surface.
  4. Completed SuperWrap II application, 4 wrap (8 layers) system.
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


For more information about Belzona visit: