Compressed Air Petrol
Compressed air blowers are used for preheating rails before welding to ensure that the rails are heated evenly and to a sufficient temperature. This is important because it helps to prevent the formation of cold shuts, which are defects that can occur in welds when the metal is not heated properly.
The compressed air blower is used to direct a stream of hot air onto the rails. The hot air helps to raise the temperature of the rails, and it also helps to remove any moisture that may be present on the surface of the rails. The moisture can cause problems with the weld, so it is important to remove it before welding.
The temperature of the rails is typically raised to between 200 and 300 degrees Fahrenheit. This temperature is sufficient to heat the rails evenly and to a sufficient temperature for welding. The preheating process typically takes a few minutes, and it is important to ensure that the rails are heated evenly throughout.
The use of a compressed air blower for preheating rails before welding has several advantages. First, it is a relatively inexpensive and easy-to-use method. Second, it is a safe method, as there is no risk of fire or explosion. Third, it is a quick and efficient method, as the rails can be heated quickly and evenly.
Here are some of the steps involved in using a compressed air blower for preheating rails before welding:
- Inspect the rails to ensure that they are free of defects.
- Clean the rails to remove any dirt or debris.
- Set the temperature of the compressed air blower to the desired level.
- Direct the stream of hot air onto the rails.
- Monitor the temperature of the rails to ensure that they are heated evenly.
- Once the rails are heated to the desired temperature, they are ready to be welded.
