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The requirement for Calibrated welding Machines is an often misunderstood requirement. Amperage ranges, voltage ranges, wire feed speeds, gas flow rates etc. Are all variables that are needed to be controlled and specified for welding procedure specifications, HOWEVER
Most codes do not require that welding machines be calibrated. Or is some cases even the gauges. That requirement is often spelled out in the companies quality manual. AISC, AWS D1.x and ASME may all address these requirements differently. That does not mean you do not need to check the operating condition of a machine. Or use an accurateammeter or voltmeter. Often times the manufacturers installed gauges may be sufficient. If the item needs to be traceable to an NIST standard is something that would be addressed in the quality system. AWS D1.1 does not have the word "Calibrate" used in reference to anything other than UT that I could find. Neither does section IX. It is best to look at the needs of your own quality system. Take into consideration the code requirements, how you will adhere to them, how you will verify that you are adhering to them and how you will document that you adhered to them. The gauges ON the welding machine could be calibrated HOWEVER that does not assure you that you are welding with a certain amperage/voltage at the welding source. Here are some interpretations from ASME Sec IX with the word "Calibration" in them . Interpretations are VERY easy to locate with Cspec Turbo INT software. Even the Nuclear code addresses the requirement in Sec III. All information provided on this page is copyrighted and shall not be duplicated. All information provided is used with permission from C-Spec.
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