To enhance the performance of square pipes, hot-dip galvanizing can be applied. Hot-dip galvanizing is a thermal treatment technique. During the hot-dip galvanizing process of square pipes, continuous inspections are required to meet specifications. Not measuring the pipe's quality can lead to numerous impacts.

One requirement for inspection is the adhesion ability, specifically the thickness of the galvanized layer on hot-dip galvanized square tubes. Since the galvanized layer of hot-dip galvanized square tubes determines whether they meet anti-corrosion requirements, professional measuring tools can be used during the inspection process. During inspection, there are certain specifications for the thickness of the galvanized layer on hot-dip galvanized square tubes, and these specifications must be labeled accordingly.

Next, the basis for inspection is uniformity, specifically the thickness of the galvanized layer. To enhance the application quality of hot-dipped galvanized square tubes during the inspection process, the post-manufacturing thickness requirements must meet the application standards, ensuring no damage occurs during application.

Furthermore, during the inspection process, the tightness between the square tubes must be checked, specifically the contact accuracy. If the precision of the hot-dipped galvanized square tubes is poor during use, the galvanized layer will peel off, leading to corrosion by other objects and rendering the hot-dipped galvanized square tubes unusable. During the inspection, a simple method can be employed, which is to strike two hot-dipped galvanized square tubes against each other. If they exhibit any protruding characteristics, they will not sustain damage, indicating a definite quality issue.