For low-temperature valves with a diameter of less than or equal to DN40, should socket welding or butt welding be used?
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Dear sea friends, for low-temperature valves with a diameter of less than or equal to DN40 that you have used or come across, should welding be done by socket welding or butt welding?
If there are high pressure requirements, then there must be corresponding technical requirements as well. Most of them will work. Typically, such valves are made of stainless steel. It is important to remember that* before welding, the valve core must be removed, leaving only the valve body for welding. It can be reinstalled only after it has returned to room temperature, to prevent thermal deformation of the seals inside the valve.
Either is fine; plug welding or fillet welding. It is recommended to choose plug welding~