Why is polishing necessary for stainless steel heat exchange tubes?
By: mxgy,
Stainless steel heat exchange tubes can be polished to optimize heat transfer efficiency, ensure performance, and improve installation adaptability.
1. Remove surface oxide scale/impurities and enhance heat transfer
After leaving the factory or being processed, the surface of the tube is prone to adhering oxide scales, oil stains, etc. These substances have high thermal resistance and can reduce heat transfer efficiency; Grinding can remove such layered materials, allowing the pipe wall to directly contact the fluid and reducing heat transfer obstacles.
2. Repair processing defects to avoid potential corrosion hazards
In processes such as cold drawing and bending, scratches, burrs, or small cracks may occur on the surface of the tube, which can easily accumulate chloride ions and cause localized corrosion (such as pitting); Polishing can smooth out defects, make the surface smoother and more uniform, and reduce the risk of corrosion.
3. Ensure sealing and connection accuracy
Heat exchange tubes need to be welded or expanded to the tube plate. If there are unevenness on the tube mouth or joint surface, it will cause unstable welding and ineffective expansion sealing (leakage); Polishing can make the connecting surface flat, ensure a tight fit with the pipe plate, and improve the sealing reliability.
4. Adapt to special working conditions requirements
For pipes used in the food and pharmaceutical industries, the surface should be smooth and free of dead corners (to avoid bacterial growth caused by material residue), and polishing can reduce the roughness of the pipe wall (usually Ra ≤ 0.8 μ m), meeting hygiene standards; Partial high-pressure conditions also require polishing to enhance the uniformity of the pipe wall and avoid local stress concentration.
Why is polishing necessary for stainless steel heat exchange tubes?
By: mxgy,
Stainless steel heat exchange tubes can be polished to optimize heat transfer efficiency, ensure performance, and improve installation adaptability.
1. Remove surface oxide scale/impurities and enhance heat transfer
After leaving the factory or being processed, the surface of the tube is prone to adhering oxide scales, oil stains, etc. These substances have high thermal resistance and can reduce heat transfer efficiency; Grinding can remove such layered materials, allowing the pipe wall to directly contact the fluid and reducing heat transfer obstacles.
2. Repair processing defects to avoid potential corrosion hazards
In processes such as cold drawing and bending, scratches, burrs, or small cracks may occur on the surface of the tube, which can easily accumulate chloride ions and cause localized corrosion (such as pitting); Polishing can smooth out defects, make the surface smoother and more uniform, and reduce the risk of corrosion.
3. Ensure sealing and connection accuracy
Heat exchange tubes need to be welded or expanded to the tube plate. If there are unevenness on the tube mouth or joint surface, it will cause unstable welding and ineffective expansion sealing (leakage); Polishing can make the connecting surface flat, ensure a tight fit with the pipe plate, and improve the sealing reliability.
4. Adapt to special working conditions requirements
For pipes used in the food and pharmaceutical industries, the surface should be smooth and free of dead corners (to avoid bacterial growth caused by material residue), and polishing can reduce the roughness of the pipe wall (usually Ra ≤ 0.8 μ m), meeting hygiene standards; Partial high-pressure conditions also require polishing to enhance the uniformity of the pipe wall and avoid local stress concentration.
