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Chemical and Process Engineering Resources

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Category: Plant Basics
Question: What type of fasteners should be used with stainless steel piping?
Keywords: v1i1,stainlesssteel,ss,galling,piping,fasteners,bolts,nuts
Answer: There's risk of galvanic corrosion if you were to use mild steel fasteners. It's recommended to use bolts that of the same material as the piping material in this case. Another concern is that the threads on stainless steel bolts are often distorted or "galled" after being tightened and loosened a couple of times. Consider using a different stainless alloy designed with "anti-galling" characteristics for the nuts. There are also inserts available for SS nuts to prevent this as well.