The 1993/94 ASU II Praxair project at Prentiss, Alberta, called for an expansion to the air separation plant PCL Industrial built in 1982. The plant draws air from the atmosphere and separates the gases by means of extremely low temperatures. The main products produced are oxygen and nitrogen. The expansion work included an addition to the compressor building, the installation of two PHX structures, onsite construction of the cold box, and the addition of oxygen and air compressors along with numerous other pieces of equipment. Included in the contract was the underground piping and foundations. The most notable subcontracted work was the piling, electrical, insulation, and compressor building erection.
During construction, this project was considered to be one of Praxair’s best in regards to cost, schedule, start-up ease, and low operating power consumption.