The first step is to knock: in order to make the nut easier to loosen, it is necessary to knock the rusted 304 seamless galvanized square pipe slightly with a square top hammer. The galvanized square pipe factory should reasonably stack the knowledge. If the nut is cast iron, it needs to be slightly hard. Q345B galvanized square pipe and ordinary plastic parts only need to be gently knocked. If not, use the hammer to rotate in the direction to knock 304 seamless galvanized square pipe.

Step 2: do not use a wrench to hard screw the rusted stainless steel screw to avoid breaking the stainless steel screw or damaging the wrench. At this time, it is necessary to use an iron hammer to shake the wrench handle so that the rusted stainless steel screws can be easily unscrewed.

The third step is punching: sometimes 304 seamless galvanized square pipe will be deformed due to corrosion. Galvanized square pipe - galvanized square pipe - hot galvanized square pipe - galvanized square pipe factory - galvanized square pipe factory - Tianjin galvanized square pipe factory can't remove it with a wrench or a wire wrench. At this time, the "impact method" is used. What is "impact method"? It is to impact the "U-shaped groove" in the vertical direction of the top of 304 seamless galvanized square pipe with an iron hammer and a turbine hammer. The galvanized square pipe factory shall reasonably stack the knowledge and then adjust the angle of the punching cone. The Q345B galvanized square pipe can be unscrewed after the oil flows in.

The fourth step is burning: when the 304 seamless galvanized square pipe is relatively rusty, and none of the above methods is effective, the form of "fire attack" shall be adopted. Now, the screws and nuts are barbecued with gas welding oxidation flame. After the surface is burned red, a little oil is dropped. The method of "thermal expansion and cold contraction" is adopted to increase the gap between the screw rod and 304 seamless galvanized square pipe. The rusted 304 seamless galvanized square pipe can be unscrewed after the oil flows in.