"Butt weld vs. Socket weld fittings in 93% h3SO4"


"Does anyone have any previous experience using 316L stainless steel, socket welded fittings with 93% h3SO4? The piping system will outdoors, and uninsulated. Maximum ambient temperature will be 100°F. We are primarily concerned with crevice corrosion in the socket fittings. We would like to avoid using butt welded fittings if at all possible"


Type 316L stainless steel socket weld fittings should perform well in 93% sulfuric acid, at a maximum temperature of 100F. However, chloride stress corrosion cracking (SCC) in crevices may be a potential failure mode, if chlorides are present in the acid as contaminants.


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