Stainless steel flange nuts and general stainless steel hexagon nuts are basically the same in size and thread specifications, but compared to stainless steel hexagon nuts, stainless steel flange nuts are gaskets and nuts that are integrated, and there are anti-skid teeth on the bottom, so that The contact between the surface area of the nut and the workpiece is increased, and it is stronger and stronger than the combination of ordinary nuts and washers.
Generally, the specifications of common stainless steel flange nuts are generally below M12, because most of the flange nuts are used on pipes and flanges, so due to the constraints of the workpiece, the specifications of flange nuts are less than those of nuts. Some flange nuts above M12 are mostly flat flanges, that is, there is no tooth pattern on the flange surface. Most of these nuts are used in some special equipment and special places. The stainless steel flange connection exerts a temperature load of 573K on the inside and outside of the flange. . There is no insulation layer applied to the outer surface of the flange and the pipe, and the influence of the air layer in the bolt holes, the air layer between the upper and lower flanges, and the heat transfer of the outer surface of the flange on the temperature distribution of the system is considered. The equivalent convective heat transfer coefficient is applied to the outer surface of the flange, the contact parts of the bolts and nuts with the air, and the respective equivalent thermal conductivity coefficients are applied to the air layer in the bolt hole and the air layer between the upper and lower flanges.