Module 1a) Introduction
The introduction will briefly cover the three pillars of the Life Extension Concept, Fatigue Assessment, Inspection and Weld-Improvement Methods
Module 1b) Fatigue of Welded Attachments
The challenge in successfully being able to extend the service life of an offshore structure lies in the tackling of the fatigue hot-spots. The fatigue hot-spots are predominantly located at specific welded attachments. In this section we look into why welded attachments are relatively weak, what factors play a part in their fatigue life and how we can strengthen these locations of structural integrity concern.
Module 1c) Weld Improvement Methods
Looking into the different weld improvement methods; Ultrasonic Peening, Burr Grinding, Hammer Peening and TIG Dressing focusing on the benefits and drawbacks of these methods as well as studying cases where these have been successfully applied. The main weld improvement method in this module and in the workshop will be Ultrasonic Peening. The participants will gain understanding of the procedures and the possibilities these methods enable as well as the pit falls.
Module 2a) Practical Demonstration: Application of Ultrasonic Peening
We will have a demonstration of the ultrasonic peening treatment. The participants will be allowed to use an ultrasonic peening system to treat the weld toe e.g. weld surface of a welded sample.
Module 2b) Access
The different methods used to gain access to fatigue hot-spots either for inspection or for weld improvement methods can dictate the time/cost of the activity as a whole. Different ways of access will be discussed such as rope access, scaffolding and working in confined spaces.
Module 3a) Case Studies
As the three main pillars of structural life extensions by ultrasonic peening concept have been covered, we will now look at some case studies of life extension projects.
- TLP Neptune
- UP treatment of pipe lines
- FPSO Triton
- UP Treatment of lattice tower
- FPSO P-37