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Tuesday, 22 December 2009 09:38 |
 A new method allows welders with little background in magnetism to reduce arc blow during DC welding of pipelines.
Arc blow most commonly occurs after an in-line magnetic-flux-leakage inspection tool magnetizes a pipe wall during an inspection run. DC arc welding is one of the most popular techniques in the oil and gas industry because of its versatility and relatively low cost. Interaction between the magnetic field associated with the current flowing through the electrode and the residual magnetic field in the pipeline under repair can produce arc blow.
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Last Updated on Tuesday, 22 December 2009 07:47 |