Horizontal Position In Welding ✦ Direct

His journeyman, Lou, was a quiet veteran with 30 years of experience. Lou looked at Marco’s setup and asked, “What position are you using?”

“Flat, of course,” Marco said, pointing to the top of the pipe. “The bracket goes here.” horizontal position in welding

Within three inches, his molten puddle sagged. The top bead looked fine, but the toe on the lower side was jagged—metal had dripped downward before solidifying. He tried speeding up, but that just created cold lap. Frustrated, he chipped off the slag and saw the truth: a weak, uneven weld with undercut along the bottom edge. His journeyman, Lou, was a quiet veteran with

Lou knelt beside him. “You fought gravity. In flat position, gravity helps you. In horizontal position, gravity pulls the puddle down . You need to aim your rod slightly upward and pause on the top edge to let the metal freeze before it sags. Also, run a stringer bead—don’t weave wide.” The top bead looked fine, but the toe

Marco ground out his mess and tried again. This time, he tilted the electrode 5–10 degrees upward, kept a tight arc, and moved steadily. He watched the puddle solidify like a tiny shelf, each ripple locking in place before the next. The weld was flat on top, slightly convex on the bottom face, and fully fused.

Marco was a second-year welding apprentice working on a water treatment plant upgrade. His task: weld a support bracket onto a 12-inch horizontal steel pipe that carried non-potable water. The pipe was stationary, about chest-high, and the weld was a simple fillet—a perfect opportunity to practice.

Marco shrugged. He’d done flat welds before. He struck an arc.