Original oil and gas trade magazine vintage ad for PETRO-CHEM DEVELOPMENT COMPANY. Main office was located at 122 East 42nd Street, New York City, NY. Petrochem-Isoflo Heaters charge Worlds Largest Powerformer. Powerformer charged by Petrochem-Isoflow heaters at Esso's Baton Rouge, LA refinery. Has a capacity of 26,900 barrels per day. This unique 1959 one-page old petroleum refining and processing industry equipment magazine advertisement would display beautifully matted and framed.