Can stainless steel flanges be connected with carbon steel bolts? This question is not very clear to friends who have just started installing pipe fitting flanges. HEBEI CANGRUN PIPELINE EQUIPMENT CO., LTD. will take you to analyze it. If the environment where the bolts are used does not need to consider the corrosion problem, carbon steel bolts can be selected only by considering the strength level, but there is a problem of electrochemical corrosion between different materials, you can use galvanized flat gaskets to solve the problem, galvanized flat gaskets The function of the sheet is to isolate the stainless steel flange and the carbon steel bolts. Another function of the flat gasket is to facilitate disassembly. If only the bolts and nuts are attached, the carbon steel bolts will be difficult to disassemble if they are rusted.
If used outdoors or in a humid environment, the moisture will accelerate the corrosion of carbon steel bolts. It is recommended to use stainless steel bolts. However, stainless steel bolts also have shortcomings. The strength of stainless steel bolts is low and the teeth are easily damaged when tightened with force. In addition, the cost of stainless steel bolts is high.
HEBEI CANGRUN PIPELINE EQUIPMENT CO., LTD. A friendly reminder that stainless steel flanges are matched with stainless steel bolts or carbon steel bolts is not strictly regulated in the implementation standard, which can be determined according to the actual situation. 304 stainless steel flange matching stainless steel bolts are beautiful and rust-free, and 30CrMo and 35CrMo bolts can also be blackened. It would be better if 30CrMo and 35CrMo galvanized bolts can be used.
Post time: Sep-08-2023