Is it necessary to use stainless steel bolts for stainless steel flanges? ? ?
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What I saw at the customer's site was that stainless steel valves and stainless steel blind plates were made of carbon steel bolts! ! ! Gentlemen, do you have any basis for this? ? Can it be used like this?
It is best to use stainless steel. The contact between stainless steel and carbon steel will cause the rust of stainless steel and carbon steel to stain the stainless steel, which will accelerate the rust of stainless steel.
The truth is this! ! But why dare to use carbon steel on site? ? ? How much will this increase the corrosion rate of stainless steel? ?
Stainless steel bolts should be 316L. Even so, the strength may not be enough. Therefore, carbon steel and alloy steel are used.
It can be used in this way, and there are no restrictions in the specification. The main reason is that stainless steel bolts are soft and carbon steel bolts are cheap.
Such use will cause carbon steel bolts to corrode. If used outdoors or in a humid environment, corrosion will occur very quickly. This is a typical electrochemical corrosion of a large cathode and small anode structure. Anti-corrosion measures such as increasing the size of stainless steel bolts or coating the outer surface of carbon steel bolts can be considered
The general chemical plants required for clean production are carbon steel alloy steel bolts
Strength is not an issue. The threads of stainless steel bolts and nuts are easy to bite and bond and are not easy to remove.
Stainless steel does not corrode, but attention should be paid to the corrosion of carbon steel bolts in the environment.
Generally not required! Look at the definition of business!