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mbohuntr · 10-29-2008, 03:03 PM

Back to your tank, We used to sub arc boiler shells 20 years ago, the machine made a top(outside) pass, then the operater would gouge out the inside and run an inside pass. All welds were x-rayed and stamped. (ASME IX)As to downhand spray-arc on your tank? IMHO, the cert test is rigged because they required you to run multiple passes quickly thereby getting around the issue of cold fusion. Those welders who let the work cool failed miserably. The tank may by light enough guage to run mig on and get good fusion, but I would not do it downhand... and it will be brittle.

10-29-2008, 03:03 PM	#29 (permalink)
mbohuntr Silver Member Join Date: Jul 2008 Location: Volney, NY Posts: 196	Re: Interesting Welding Statement. Back to your tank, We used to sub arc boiler shells 20 years ago, the machine made a top(outside) pass, then the operater would gouge out the inside and run an inside pass. All welds were x-rayed and stamped. (ASME IX)As to downhand spray-arc on your tank? IMHO, the cert test is rigged because they required you to run multiple passes quickly thereby getting around the issue of cold fusion. Those welders who let the work cool failed miserably. The tank may by light enough guage to run mig on and get good fusion, but I would not do it downhand... and it will be brittle.