The pipe is fixed in a vertical position (standing on its end), and the welder performs a circumferential weld around the pipe in a horizontal path. The Gravity Challenge: Avoiding "Sagging"
“Root pass looks clean,” Elias said in her ear. “You’re burning through on the top edge, though. Angle down five degrees.” 2g position
The primary difficulty of 2G welding is the downward pull of gravity on the molten weld pool. Unlike flat welding, where gravity helps seat the metal into the joint, horizontal welding requires the operator to "fight" gravity to prevent the metal from sagging toward the lower edge of the joint. Common defects associated with poor 2G technique include: The pipe is fixed in a vertical position
The TA is an integer value from 0 to 63, where each step represents a timing adjustment of one bit period ($3.69 \mu s$). This corresponds to a distance resolution of approximately 550 meters (the round-trip distance light travels in that time). Angle down five degrees
“That’s why you’re the best,” Elias said. “You don’t fight the puddle. You marry it.”
She looked down at her hands—at the burns, the scars, the years of work—and then back at the weld, which gleamed under her helmet lamp like a silver scar on the skin of the universe.
