Pipe welding
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The pipe is purged with argon; TIG welding is used for root pass, and stick welding for filler passes； What’s the difference in usage between using argon-filled welding and not? 304 thick-wall pipe, does not come into contact with materials. By the time it was discovered, the welding was already complete.
I don’t understand what it means. . First option: TIG welding for the root pass, and shielded metal arc welding for the cover pass? Second method: All TIG welding. For 304 material, TIG welding uses solid wire, with argon shielding applied throughout