Thermit welding materials will be failed with water.  All welding materials should be kept away from any moisture in storage, as well as in the welding process.

No less than 4(Four) personnel in a welding team.Ensure all the welding materials and tools match the rail size & grade before welding.

The welding for preheating should adopted the the RMTS brand, the shearing should be applied bidrectional shearing machine , grinding should applied internal combustion grinding machine.

Sand mold, crucible, powder and welding parts should be handle with care to be protected from moisture when operating in a rainy environment.

Sufficient light should be guaranteed to ensure accurate rail aligning.   

It is easy to cause welding defect in cold weather. When the rail temperature is lower than 15 °C, it should be heated at least 1m on both sides of the rail to remove moisture on the surface of the rail. When the rail temperature is lower than 15 °C, the welded joint should be covered with a heat shield for 10 minutes to prevent from the welding head cooling fast.

After the welding is finished, the joint temperature is higher than 300 °C. It is strictly forbidden to release the train and disturbance the rail.

Before construction, the rail temperature gauge is attached to the middle of the backlight rail waist side. After the rail temperature meter is pasted for 10 minutes, the rail temperature can be read.