Tank Line

17-62 Tank N1 Replacement

Scope of work for a 3ft wide x 23 ft long x 8 ft deep stainless-steel tank included the removal of all internal piping, blind flange, and all external piping below grating as well as the removal and reinstallation of a side mounted coil, gasket bumpers, and a deep clean of the tank walls and bottom. Following, Dahlgren installed a new stainless sparge air piping with branches on each side of the tank, single downcomer into the tank, and support of the existing side mounted unistrut.

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17-45 Tank AA19 Replacement

This project involved fabricating a new stainless-steel tank with a new KCC coating for replacement of the existing tank, AA19. Dahlgren preformed all rigging for removal of the existing, and placement of the new tank. New utilities installed included CPVC and stainless-steel piping as well as installation of existing components such as anode and cathode plates and all instrumentation required. The removal and installation all occurred over a three-week shutdown period during the December holiday break.

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17-68 Tank M19 Replacement

This project involved converting Tank M19, M20A & M20B to a Dipsol solution. This conversion took place over one weekend and required careful shutdown planning, and constant coordination and communication with the project team.

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17-68 Modernization

This project required removal and refurbishment of several tanks in a high hazard tank line. This included rigging and removal of tanks to be shipped across the country for proper modifications to be made. Several tanks swapped locations in the tank line to better improve the process, requiring significant civil, structural, mechanical, and electrical modifications. Installation of the new tank required excavation down to 22 feet below finished floor requiring 14 dewatering wells removing 2.2MM gallons daily. Structural upgrades required Dahlgren to strengthen the existing crane rails and hangers for installation of an additional bridge crane. Total project duration was 18 months, while keeping the remaining tanks operational throughout.

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