Project Overview

A refinery wanted to replace a decommissioned 80,000 barrel storage tank with a new tank of equal size. The new fixed-roof tank, with modern design features, would be used to store diesel and various distillates. Rally provided multi-discipline engineering services to first define the basic project parameters (FEED phase), then produced all of the detailed procurement and construction deliverables.
The brownfield design challenges of this project included working around existing infrastructure (both above and below grade), and employing a novel kind of geomembrane liner for spill containment.

Tank 803 Replacement main Tank 803 Replacement first Tank 803 Replacement second

Scope of Work

The project was executed in several phases. The original 80,000 barrel tank was emptied, cut apart, and hauled away. Live piping and cables adjacent to the original tank were disconnected and demolished to the edges of the tank berm.

A new 80,000 barrel API 650 column-supported cone roof tank was constructed atop a new tank pad foundation. A cathodic protection system and a Teranap elastomeric bitumen geomembrane liner were built into the granular foundation. Piping, electrical, and instrument connections were made to the new tank. The surrounding berms were reshaped for erosion protection, and the finished surface of the tank cell was regraded towards a new drainage sump.

Deliverables

Construction work packages (CWPs) were delivered for tank and piping demolition, new tank completions and piping connections, earthworks, concrete / piling, grouting, structural steel, electrical and instrumentation work. Rally provided construction support for all CWPs.

Material requisitions (MRs) were delivered to enable the purchase of the new API 650 tank, stairs, and rooftop platform; miscellaneous piping specialty items; tank cathodic protection system; tank level, temperature, and pressure instruments; control valves, MOVs, and pressure-relief valves.

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