![]() ![]() The work piece and the consumable electrode melt, which, when cool, forms the joint. An electric current is used to form an electric arc between the electrode and the metals to be joined. Types of Welding Techniques: Shielded Metal Arc Welding (SMAW)Īlso known as manual metal arc welding or stick welding, this process uses a consumable electrode covered with flux. Modern welding techniques have evolved to offer better performance partly inspired by contemporary inspection techniques that have improved to the point that minute defects and inclusions can now be easily discovered long before a tank is ever put to use. ![]() But while the concepts of welding remain the same, new tools, chemicals, uses, and safety standards reflect modern technology and techniques. If you cannot find a particular chart now, please check back periodically since we plan to update this collection as additional charts become available.Ġ.375" = 3/8" 0.500" = 1/2" 0.625" = 5/8" 0.750" = 3/4" 0.Welding has ancient roots with evidence of welded objects dating back to the Middle Ages. In providing this information, Unidocs is not endorsing the use of any particular manufacturer's equipment. Since original tank charts can be difficult to find, Unidocs has provided the following charts as a service to UST owners / operators and UST Service Technicians. If you cannot find an original chart, Modern Welding has a tank chart generator for steel tanks available here. Click here for Containment Solutions tanks.Some tank manufacturers have calibration charts available on their websites: ![]() ![]() When performing an underground storage tank (UST) overfill prevention equipment inspection, it is very important to use the correct tank calibration chart to determine whether or not the equipment is activating at the correct level. ![]()
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