CWI recently completed a weld repair of a turbine runner for the Ramu 1 hydropower station owned by PNG Power Limited (PPL). CWI was contracted by the turbine refurbishment contractor, AG Investment Limited (AGI) to support the welding repair work of the turbine runner constructed from martensitic stainless steel and suffered from cavitation damage.
In the weld repair work, CWI provided consultancy support in:
Despite facing a number of challenges were faced in the weld repair duration, our team applied the experience, skills and knowledge with respect to material, welding and inspection to ensure the quality of weld repair. Although tight quality control measures were applied, the repair was completed two week earlier than the planned schedule. This was achieved through pre-mobilisation planning and repair methodology design, try implementation of repair methodology prior to start of weld repair, in-situ supervision by welding engineer in the repair process and effective coordination with the supporting departments.
The details of this case study can be viewed on https://www.cwi-services.com/wp-content/uploads/2022/07/Case-study-011-Turbine-runner-weld-overlay-repair.pdf
