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Specialised Backgas Solution

For tie-ins, there was a requirement for IK’s Valkyrie System™, a specialised welding purge barrier system, which has been designed for removal through 1” NS (28mm id) Threadolet after welding.


Specialised backgas solutions & services / Field Service


September - December 2019


Norway, North Sea - Heidrun (Floating tension leg platform)

Project Manager:

Rui de Cunha Reis Fortes

Due to the use of long flangeless lengths of piping and multiple bends, traditional back-gas equipment would be challenging to remove after welding and would in most cases require flushing for removal. With the use of IK’s Valkyrie System™ one can avoid the traditional tasks of flushing, hydrostatic pressure testing and drying of the pipelines after the welding operations, thus significantly reducing the commissioning time and cost.

IK’s Valkyrie System™ products use an advanced gas purge monitoring and flow control unit. All operations are carefully planned, and all products are custom built in-house at IK-Norway. All services are performed by experienced and certified IK-Norway personnel.

  • Extremely efficient purging of inert gas
  • Excellent weld quality
  • Backgas products up to 24" can be removed through 1"


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