1. General requirements for cooling time
Natural cooling: After welding is completed, the joint should be cooled naturally, and no external force should be applied during the cooling process to ensure the strength and quality of the welded joint.
Cooling time range: The cooling time usually ranges from 10 minutes to 60 minutes, depending on the diameter of the pipe, the wall thickness and the requirements of the welding process.
2. The influence of ambient temperature on cooling time
High temperature environment: When the ambient temperature exceeds 25℃, the cooling time should be extended by 1 minute for every 1℃ increase.
Low temperature environment: When the ambient temperature is below 5℃, the cooling time can be reduced by 1 minute for every 1℃ decrease.
3. Cooling time for specific welding processes
Saddle type joint: The cooling time should be greater than 60 minutes, or in accordance with the requirements of the product manual.
Hot melt socket connection: The cooling time is at least 10 minutes, and the joint should not be subjected to excessive stress during this period.
4. Precautions
Follow the product manual: In actual operation, the operation should be strictly carried out in accordance with the requirements of the welding machine screen prompts and the product manual to ensure that the cooling time meets the regulations.
Avoid artificially shortening the cooling time: Artificially shortening the cooling time to improve efficiency is very wrong, which may lead to a decrease in the quality of the welded joint.
