He was burning in a 6G position—the Everest of pipe welding. The joint was a 12-inch schedule 80 carbon steel pipe, fixed at a 45-degree angle. To pass this test, or to pass this real-world repair, a welder had to weld overhead, vertically, and horizontally all in the same bead. Leo wiped the sweat from his eyes with a greasy forearm.

They brought the line up to 1,500 psi. Leo held his breath. The pipe didn’t sweat. It didn’t weep. His weld held.

“Pressure test,” the foreman said over the radio.