In a corner of the workshop, a worker stands before a newly completed tank, the beam of a flashlight slowly sweeping across the inner wall.

He leans half his body through the manway, his eyes following the movement of the light — checking whether the interior polish is uniform, whether there are any pinholes in the welds, whether any weld slag remains in the corners. No detail is overlooked.

After finishing one tank, he neatly writes down the serial number and his findings in the logbook, then moves on to the next. His hands may be stained with grease, but his heart is set on the standards. In the end, the customer decides whether the equipment is good — but as far as he’s concerned, it has to pass his own inspection first.