There is a wide range of duties in welding depending on the industry you want to enter. Some examples would be: Basic welding which would include things like patching or repairing items such as auto mufflers, farm equipment, personal property or consumer items. Semi advanced welding which would include things like non code fabrication and repair of items such as ornamental metals, trailer building, or non critical fabrications. Advanced welding which would include welding on buildings, pipelines, bridges, etc.. This area generally requires welding certification. Super skilled welding which would include welding medical, aerospace, nuclear, underwater, etc.. In some industries, you are required to weld, prepare and grind, move your equipment and supplies. In others, you could be at a work bench with cotton gloves while others prepare or move your supplies and equipment for you. Generally speaking, the less training and certifications you have, the more physical the work is. By no means think that welding is still the old "big hammer and small hard hat". Very skilled welders are in high demand, paid and treated well. A good source of information would be WWW.AWS.ORG.
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roster welding
SAW welding is a type of arc welding while ERW welding is spot or seam welding. SAW stand for submerged arc welding while ERW stands for electric resistance welding.
smaw welding is sheilded metal arc welding
what is the difference between ultrasonic welding & radiographic welding
Mainly In spot welding & resistance welding two type welding machines are used :- 1. Air Cooled & 2. water Cooled.