September 9, 2011
By: Harold Klempner
Hydrostatic testing of oil country tubular goods is done twice—once to test the weld seam, then again after the item is threaded and a coupling attached. Most hydrostatic testing systems test the entire length of the pipe both times, but a new unit, the box-end hydrostatic tester, tests just the threaded portion and the coupling, reducing the time and water needed for the second test.
Norton NorZon® Plus depressed center wheels now utilize a proprietary blend of patented, newest generation Norton SG ceramic alumina and Norton BlueFire™ zirconia alumina abrasives, combined with a high performance bond system for significantly improved grain micro-fracturing. The upgraded line has also been expanded with Norton NorZon Plus Fast Cut™ Depressed Center Wheels, offering the fastest material removal in the industry.
Colors in welds and what they mean - by Josh Welton
The variety of colors that can occur in welds might surprise you. Sometimes they are desirable and sometimes not. It all depends on the material, the industry, and the application.
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