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How to avoid the seizure of stainless steel screws and stainless steel nuts?

Update:17-12-2021
Summary:

Generally, stainless steel screw manufacturers do not r […]

Generally, stainless steel screw manufacturers do not recommend the use of stainless steel screws and stainless steel nuts together. The reason why stainless steel screws and nuts cannot be used together is that stainless steel bolts and nuts are often seized after being tightened during the assembly of low-temperature pipeline flanges. It is difficult to disassemble it again. So if stainless steel screws are used in conjunction with stainless steel nuts, which aspects should we solve the seizure state?

1. Cryogenic treatment can be done to invade stainless steel screws in a low-temperature liquid nitrogen tank for a certain period of time to reduce the deformation due to temperature differences and metallographic changes, thereby improving the sealing performance of the valve at low temperatures.

2. Replace the stainless steel nuts with other materials, or replace one of the basic ones with other materials. This avoids the seizure of stainless steel bolts and stainless steel nuts

3. At present, there is still a technology that can prevent the bite of the screw and the nut from occluding,

4. When using stainless steel screws and stainless steel nuts, put some grease on the stainless steel screws to avoid the phenomenon of stainless steel screws seizing.
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