Articles written by Walter J. Sperko

P.E.

Results: 2

	Random radiography Fabricators and contractors always should check to be sure that the extent of nondestructive examination and the acceptance criteria required are understood clearly by all parties and documented in writing. Publish date: July 12, 2005
	Brazing copper tubing Torch brazing copper tubing is one of the most common–but widely misunderstood–joining processes. It's possible to make sound joints that are just as strong as the copper tube, easier to braze, and less expensive to produce. But first you have to know basic brazing concepts, including... Publish date: May 15, 2003