Walz were engaged by our client to complete necessary maintenance repairs and improvements to four 22m diameter thickener tanks, as part of their periodic API inspection requirements. The scope of work involved the replacement of corroded pipework, internal feedwells, structural repairs to the strakes, and full internal blast and paint. The work was scheduled over a 12-month period to coincide with the regular operational downtime, with Walz working with our Client to ensure that each thickener tank was returned earlier than scheduled, to minimise the overall duration of the program of work and thereby the time spent at reduced operating capacity. 

 To complete the repairs of each thickener tank, Walz designed and built a full internal scaffold system that provided access for the blast and paint work and replacement work consisting of 54T of At-Pac Ringlok scaffold. This scaffold was erected to provide access to all internal surfaces of the tank, as well as a large working area for the replacement of the internal feedwells and pipework. 

 Key highlights were: 

• Completion of 2500m2 of blast and paint 
• Removal and replacement of 300m of associated piping 
• Completion of nearly 14,000hrs injury and lost time free