Q195B welded steel pipe common problems and solutions

Q195B welded steel pipe may appear in the use of the following common problems and corresponding solutions:

1. Weld quality problem:
- Problems: Quality problems such as inclusions, pores and cracks inside the weld.
- Solution: control welding process parameters, select appropriate welding methods and filling materials; Check the welding equipment regularly to ensure that the equipment is working properly.

2. Hot cracking problem:
- Problem: Q195B welded steel pipe is prone to hot cracking during the welding process.
- Solution: The method of preheating and controlling the cooling rate to alleviate the thermal stress; Select the appropriate welding sequence and filling material.

3. Deformation problem:
- Problem: Q195B welded steel pipe may be deformed after welding.
- Solution: Use appropriate supports and clamps to reduce deformation; Control the local heating in the welding process to avoid excessive heat concentration resulting in deformation.

4. Hydrogen embrittlement problem:
- Problem: Q195B welded steel pipe has the risk of hydrogen embrittlement during the welding process.
- Solution: strictly control the water content in the welding environment to avoid hydrogen absorption; Use low hydrogen electrodes or filler materials.

5. Corrosion problem:
- Problem: The weld is prone to corrosion.
- Solution: Select filling materials with good corrosion resistance; Apply anti-corrosion treatment, such as coating or cathodic protection, to welded pipes.

By adopting the appropriate welding process, strictly controlling the welding quality and paying attention to the safe operation specifications, the common problems of Q195B welded steel pipe can be effectively avoided, and the welding quality and use safety can be ensured.