Our team provided qualified supervision, safety oversight and manpower to perform the Ammonia Tank and Piping Replacement Project at the APS Sundance Power Plant. The ammonia tank has a crucial role in plant operations as it works to eliminate NOX emissions. The ammonia tank works as a catalyst for emissions in the selective catalyst reduction system (SCR) system. Attention to detail was critical on this project as any complications could have resulted in a delay in bringing the plant back online.
The general scope of the Ammonia Tanks and Piping Replacement was to install two (2) new 15,000-gallon (each) ammonia storage tanks, as well as furnishing and complete installation of all-new piping and associated valves, fittings, etc., to replace the ammonia distribution piping. This work was scheduled within a 40-day window.
One of the lessons learned from this project stemmed from the acid tanks being manufactured by a third-party vendor. In order to mitigate challenges with discrepancies on drawings and the physical tanks, our team took a proactive management approach. By using value-added engineering techniques, our team identified the issues and remedied the issues during the prefabrication. We were able to save our client money through the early detection and correction of these obstacles.
The installation of over 2,000 ft of pipe within the timeline of an outage window was a significant challenge on this project. This scope was a short-duration critical path activity within the outage work window. The pipe installation was completed safely, on time, and within budget. Our team is exceptional at adhering to plant policies and procedures; thus, enabling us to be successful in this critical path work window.