Original old petroleum trade magazine vintage ad for BETHLEHEM STEEL COMPANY of PA.  Sheehan Pipeline Construction Co. of Tulsa made one trench do for all the lines running north and south through a 94 mile network linking several large petro-chemical plants in the Delaware Valley. Industrial chemicals and gases have a fast route across the Delaware River.  SunOlin project nitrogen pipelines. This unique 1962 2 page gatefold oil and gas advertisement would display beautifully matted and framed.