The post-processing of thermocouple protection tubes includes surface appearance treatment and internal cavity cleaning, which are important processes to improve product quality, appearance grade and operational stability. Excellent post-processing technology can not only optimize the product's appearance texture, but also eliminate potential quality hazards, improve the overall performance and service life of thermocouples, and form differentiated quality advantages over low-end workshop products.
In terms of surface appearance treatment, the industry processing technology has been continuously upgraded and optimized. In the early stage, many old instrument factories did not polish the surface of protection tubes. Although polishing can make the tube surface bright and beautiful, it will wear off the surface metal layer, damage the original protective oxide layer of stainless steel, reduce the surface corrosion resistance and high-temperature oxidation resistance, and affect the practical performance and service life of the product. Therefore, simple bright polishing is not recognized as a high-quality processing technology.
With the improvement of modern stainless steel pipe production technology, the raw material pipes have achieved high-precision finish treatment during factory production. In the subsequent thermocouple processing, it is only necessary to carry out professional special surface treatment and matte finishing on the tube body. The matte treatment can maintain the original structural performance and protective performance of the stainless steel material, avoid surface wear and damage, and at the same time make the product appearance neat, uniform and high-grade, balancing beauty and practicality perfectly. This standardized surface treatment process has become the mainstream technology of high-quality thermocouple manufacturers.
Internal cavity cleaning of the protection tube is easily overlooked but extremely critical. In the process of pipe cutting, turning and processing, a large amount of metal dust, oil stains and residual impurities will remain inside the protection tube. If these dirt are not completely cleaned, they will be heated and decomposed in high-temperature working environments, generating corrosive gas and impurities, which will pollute and corrode the internal thermocouple wire, resulting in unstable thermoelectric signals and reduced measurement accuracy. Severe dirt accumulation will also cause insulation failure and short-circuit faults.
Our factory implements strict full-process cleaning standards for protection tubes. After mechanical processing, all tube bodies are cleaned, dedusted and degreased to ensure zero dirt and zero impurities in the internal cavity. Combined with standardized surface matte treatment, the finished protection tubes have smooth interior, clean and beautiful exterior, stable performance and no potential hazards. The rigorous post-processing technology ensures the long-term stable operation of thermocouples and improves product quality and market competitiveness.
