Welding method for valve connections
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The welding method for the valve connections can generally be GTAW+SMAW; is it possible to use the SAW method instead?
——GTAW: Tungsten inert gas welding + SMAW: Shielded metal arc welding； SAW: Submerged Arc Automatic Welding ； 1. It is only in recent years that we have heard more about using TIG welding for the root pass; in fact, this practice was rare in the past, as construction standards have become more stringent nowadays. 2. It seems that submerged arc welding is more suitable for flat welding, and less suitable for welding between valves and pipes.
The poster is referring to the short pipes attached to the valve body, right? As far as I know, good valve manufacturers these days mostly use submerged arc automatic welding, with specialized welding equipment: lol