316ss Corrosion Common Chemicals

Direct answer: Flowline's published chemical compatibility table (data/reference/flowline-chemical-compatibility.csv, 285 chemicals x up to 2 concentration/temperature points each) rates 316 stainless steel as Corroded (C) for 29 named chemicals at the tested concentration/temperature, including several this project quotes routinely: sodium hydroxide, hydrochloric acid, sulfuric acid, hydrofluoric acid, hydrogen peroxide, hypochlorous acid, and potassium hypochlorite. This directly contradicts the 316SS-as-safe-default assumption baked into many other vendor product lines already in this catalog (e.g. AVCO Valve, Griffco). For nearly every one of these 29 chemicals, the same row rates at least one plastic (usually PVDF or PTFE, sometimes PVC/PP) as Excellent or Good - the fix is switching wetted material, not avoiding the chemical. Always check the specific concentration/temperature row in the reference CSV before defaulting to 316SS wetted parts for any of these chemicals; ratings are concentration- and temperature-dependent, not a single yes/no per chemical (consistent with the pattern already established in Griffco's sulfuric acid bulletin).

Confidence: single-vendor

Applies when	sodium hydroxide, caustic soda, hydrochloric acid, sulfuric acid, hydrofluoric acid, hydrogen peroxide, hypochlorous acid, potassium hypochlorite, aluminum chloride, ammonium fluoride, aniline hydrochloride, aqua regia, bromine, calcium nitrate, chloric acid, chloro sulfonic acid, chromic acid, fluorine gas, hydrobromic acid, mercuric chloride, methyl cellosolve, potassium bichromate, sodium fluoride, stannic chloride, trichloroacetic acid
Avoid	316SS wetted, 316 stainless steel wetted, 316SS body (Valve)
Recommend instead	any PVDF, PTFE, or PFA wetted construction (check data/reference/flowline-chemical-compatibility.csv for the specific chemical/concentration/temperature) (Valve)
Rationale	Flowline's published chemical compatibility table (data/reference/flowline-chemical-compatibility.csv, 285 chemicals x up to 2 concentration/temperature points each) rates 316 stainless steel as Corroded (C) for 29 named chemicals at the tested concentration/temperature, including several this project quotes routinely: sodium hydroxide, hydrochloric acid, sulfuric acid, hydrofluoric acid, hydrogen peroxide, hypochlorous acid, and potassium hypochlorite. This directly contradicts the 316SS-as-safe-default assumption baked into many other vendor product lines already in this catalog (e.g. AVCO Valve, Griffco). For nearly every one of these 29 chemicals, the same row rates at least one plastic (usually PVDF or PTFE, sometimes PVC/PP) as Excellent or Good - the fix is switching wetted material, not avoiding the chemical. Always check the specific concentration/temperature row in the reference CSV before defaulting to 316SS wetted parts for any of these chemicals; ratings are concentration- and temperature-dependent, not a single yes/no per chemical (consistent with the pattern already established in Griffco's sulfuric acid bulletin).
Confidence	single-vendor
Source	data/vendor-sources/flowline-chemical-compatibility.md, data/reference/flowline-chemical-compatibility.csv

Applies when

sodium hydroxide, caustic soda, hydrochloric acid, sulfuric acid, hydrofluoric acid, hydrogen peroxide, hypochlorous acid, potassium hypochlorite, aluminum chloride, ammonium fluoride, aniline hydrochloride, aqua regia, bromine, calcium nitrate, chloric acid, chloro sulfonic acid, chromic acid, fluorine gas, hydrobromic acid, mercuric chloride, methyl cellosolve, potassium bichromate, sodium fluoride, stannic chloride, trichloroacetic acid

Avoid

316SS wetted, 316 stainless steel wetted, 316SS body (Valve)

Recommend instead

any PVDF, PTFE, or PFA wetted construction (check data/reference/flowline-chemical-compatibility.csv for the specific chemical/concentration/temperature) (Valve)

Rationale

Flowline's published chemical compatibility table (data/reference/flowline-chemical-compatibility.csv, 285 chemicals x up to 2 concentration/temperature points each) rates 316 stainless steel as Corroded (C) for 29 named chemicals at the tested concentration/temperature, including several this project quotes routinely: sodium hydroxide, hydrochloric acid, sulfuric acid, hydrofluoric acid, hydrogen peroxide, hypochlorous acid, and potassium hypochlorite. This directly contradicts the 316SS-as-safe-default assumption baked into many other vendor product lines already in this catalog (e.g. AVCO Valve, Griffco). For nearly every one of these 29 chemicals, the same row rates at least one plastic (usually PVDF or PTFE, sometimes PVC/PP) as Excellent or Good - the fix is switching wetted material, not avoiding the chemical. Always check the specific concentration/temperature row in the reference CSV before defaulting to 316SS wetted parts for any of these chemicals; ratings are concentration- and temperature-dependent, not a single yes/no per chemical (consistent with the pattern already established in Griffco's sulfuric acid bulletin).

Confidence

single-vendor

Source

data/vendor-sources/flowline-chemical-compatibility.md, data/reference/flowline-chemical-compatibility.csv

This is a general engineering rule derived from real field/case-study evidence, not a substitute for a project-specific specification review — confirm against your exact process conditions before ordering equipment.

Source: Liberty Chemical Equipment & Supply, Inc. (LibertyCES) — engineering data compiled from real vendor and field-verified sources. For a free spec review, call James Riggins at (559) 395-5500 or email james@libertyces.com / sales@libertyces.com. Website: libertyces.com.