Which method is better for welding the fillet welds of pressure vessels: shielded metal arc welding or tungsten inert gas welding?
Thread Content
Seeking advice: Consider an extreme scenario in which, with control of the thermal input from the welding current taken into account, GMAW and TIG welding are used to weld the fillet welds between the nozzles and the cylinder body of thick-walled high-pressure vessels. Under fatigue conditions involving alternating loads, which method is more resistant to cracking? Is there a difference between the materials, low-alloy steel and stainless steel?
Of course TIG welding, but it is inefficient and suitable for thin-walled containers
Tungsten inert gas welding is better; it is easier to achieve a smaller root angle with tungsten inert gas welding compared to shielded metal arc welding
This post was last edited by wanlirn on 2019-5-30 08:40. Theoretically, it is of course shielded metal arc welding. At present, shielded metal arc welding offers the best overall welding performance. It’s possible that the manual welders in ordinary organizations are not very skilled, which is why some people think that TIG welding makes it easier to meet quality standards and ensure good quality；