Stainless steel bright tubes are widely used in high-end fields such as petrochemicals, food, and pharmaceuticals due to their smooth surface, high precision, and strong corrosion resistance. Industry experts remind that three key links—raw material screening, process control, and finished product inspection—must be strictly observed during production to ensure stable product quality.

In the raw material link, strict spectral analysis of steel billets is required to ensure their chemical composition complies with GB/T699 standards. Meanwhile, surface impurities such as oil stains and rust must be removed to avoid defect amplification in subsequent processing. In process control, bright annealing is the core procedure: the temperature must be accurately controlled between 1040℃-1120℃, the purity of protective gas should be no less than 99.99%, the furnace should maintain a slight positive pressure above 20kPa, and strict sealing is required to prevent oxidation. The cold rolling/cold drawing process adopts multi-pass processing with small deformation, and electrolytic polishing is performed under controlled conditions (voltage: 8-10V, temperature: 60-80℃) to ensure the surface roughness Ra ≤ 0.4μm.

For finished product inspection, online systems are used for real-time monitoring of outer diameter and wall thickness, with data collected every ten minutes. Additionally, 100% eddy current flaw detection and sampling hydrostatic testing (test pressure: 1.5 times the working pressure) are conducted. Production data is fully recorded to achieve quality traceability, avoiding issues such as surface scratches, oxidation, and weld defects from the source.

Industry insiders state that only by implementing refined control throughout the entire production process can the stringent requirements for dimensional accuracy and corrosion resistance of bright tubes in high-end fields be met, enhancing product market competitiveness.