Abstract: A heavy duty pipe spreader to open formed steel-line pipe, approximately 40 feet long, of approximately 0.250 to 0.750 wall thickness, so as to obtain an approximate 2 inch permanent edge separation prior to O.D. sub-arc welding. The pipe spreader is comprised of an approximately 45 feet long boom, pivotally supported at one end by a vertically adjustable base support and intermediate its length by four hydraulically actuated devices under the boom and mounted to the floor; these devices retract as the pipe telescopes onto the boom. A device at the extreme front of the unit centers and assists in stabilizing the pipe and unit during spreading. The pipe is received on five support rollers, the first of which drives the other four, and all of which are fixed in place and rotate only to move pipe over the vertically adjustable boom. Attached to the boom structure are five sets of pivoted arms which are operated by wedge devices attached to a center pull rod.