The Hog Tie MillHog boiler tube weld alignment clamp from Esco Tool aligns the tubes and exposes their ends for tack welding prior to removal in order to complete the entire joint weld. The clamp is made of high-strength steel and comes in 11 sizes for pipe and tube from 1.125 in. to 3.25 in. OD. Available for waterwall, economizer, header, crossover, superheat, reheat and generating tubes, the pipe and tube alignment tool is available by itself or as a complete kit with an impact wrench and socket, four 0.5-in. bolts, two spare through-hole inserts, two spare threaded inserts and a metal carrying case.