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Several questions about shielded metal arc welding

2015-06-21View Original

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I’m a complete beginner, so I have a few simple questions: 1. Is it necessary to prepare bevels for welding low-carbon steel pipes? For example, at the locations where elbows are welded or flanges are welded, it is said that no beveling is required for gaps of 6 mm or less. Could someone experienced please explain this? 2. Under what circumstances is it necessary to dry welding electrodes? For example, the northwestern region is already very dry, so there is no issue of welding rods getting damp – is drying treatment still necessary? Thank you!

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