The boiler non-metallic expansion joint may encounter various problems during long-term use, such as leakage, deterioration or aging, damage, etc. These need to be repaired in time to ensure the normal operation of the boiler system. Here are some fixes for common boiler expansion joint faults:
Air leakage repair:
First, the expansion joint needs to be emptied to ensure safe operation.
Use a special glue to seal the leak. Make sure the glue is compatible with the material of the expansion joint and applied evenly.
After waiting for the glue to dry, check again for any leaks.
Deterioration or aging repair:
If the expansion joint has deteriorated or aged, a new expansion joint may need to be replaced.
Before replacing, you need to carefully select the model and parameters to match it, ensuring that the performance of the new expansion joint is comparable to or better than the old one.
When replacing, pay attention to the proper amount of lubrication to extend the service life of the new expansion joint.
Damage repair:
For the broken expansion joint, if the crack is small, it can be repaired by controlled welding.
Cleaning: Clean the surface of the expansion joint to clean the grease, dirt, rust layer, etc. on the surface for welding operation.
Laying the welding line: According to the size and location of the crack, make an appropriate amount of cutting, and add the welding line inside the slit.
Welding: Modern welding technology is adopted to ensure temperature balance, ensuring high quality and efficiency of welding.
Smoothing: Smoothing the surface that has been welded to ensure that the structure is firm after welding.
If the damage is so severe that it cannot be repaired, the expansion joint needs to be replaced with a new one.
Installation Notes:
When installing a new expansion joint, it is necessary to ensure that it is installed correctly to avoid problems such as water leakage caused by improper installation.
Regularly check whether the inner filling (such as rock wool) of the expansion joint has fallen off, and if it falls off, it needs to be replenished in time.
The expansion joint has been pre-stretched at the manufacturing plant, and it is not allowed to compensate for errors in installation by changing the height of the expansion joint during installation.
The bellows shall not interfere with other external equipment to prevent extrusion and deformation during expansion.
Please note that when repairing the boiler expansion joint, it should be safe to operate and follow relevant operating procedures and standards. If you are not sure how to fix it, it is recommended to consult a professional boiler repairman or manufacturer.