With a view to advancing and evolving Applus+ services by bringing about technological innovations that are tailored to client needs, the Energy & Industry Division in Canada, through its brand SKC Engineering, has developed a case-specific, numerical recipe and integrated it into a welding simulation model, allowing them to identify areas susceptible to creep damage in welded structures.

Creep-life prediction model for the energy sector

This model came about following the repeated observation of failures in heat recovery steam generator (HRSG) welds after a relatively short in-service life.

The team constructed an in-house model of creep-life prediction for P91 welds, which was then integrated into the Division’s welding modelling and simulation software. This allows us to predict failures in elevated temperature applications.

This work illuminated the role of a critical damage that can occur in welded P91 and that causes the majority of early-service-life failures reported in this material around the world, but is missing from the standard design methodology.

The result is a practical solution to engineering challenges requiring solutions that can’t be found in published standards. This work underscores the importance of taking into account the effects of welding in the design stage of energy infrastructure, as well as showing how these effects can be captured using the proper tools.

Applus+ is recognised as an industry leader in the field of computational weld mechanics, with particular expertise in computational engineering of welding and complex welded structures.