FQM Minerals – Ravensthorpe Nickel Operation
Acid Tank Bottom Repairs and Base Course Remediation
About this Project
An acid storage tank at the Ravensthorpe Nickel Operation site had exhibited signs of possible deterioration of the base course beneath the tank.
Worldwide Tank Services, was engaged to analyse the problem, and to present a proposal for resolution.
WTS initially visited the site to study the issue, gather information, and to begin contemplating a repair scenario.
A proposal was prepared for our client, which included a detailed description of the circumstances that led to the leak, a proposed scope of works for the remediation process, and an associated Timeline Schedule. On acceptance of the proposal, WTS managed all facets of the project, including planning, procurement, mobilisation and execution of the Works. Procurement and resources allocation were shared between RNO and WTS, to ensure the most efficient utilisation of resources, and to manage project costs most effectively.
The detailed site works, following mobilisation and orientation of resources, involved core drilling into the top of the concrete ring beam to allow initial installation of air bags, raising of the tank to a height of 2 metres, using the air bag methodology, abrasive blast cleaning of the underside of the tank bottom to ascertain the extent and presence of pitting corrosion, fitting, welding and NDE of over 500 patch plates to the bottom, removal and replacement of the foundation base course (which had been contaminated with acid), including inspection and repair of the secondary containment liner, painting of the repaired underside of the tank bottom, lowering the tank back to grade, ensuring correct orientation with connected piping, and final inspection.
The successful outcome was that the tank was able to be returned to its designated service without compromise to its original designed service conditions.
All works were completed within 53 calendar days, and in accordance with API 653 Code regulations.