1. Look at the Appearance
Select steel pipes with a generally uniform color, smooth and even inner and outer surfaces, and no bubbles, dents, impurities, or other defects that affect surface performance.
2. Look at the Labels
The steel pipe should have clear information such as the product name, nominal outer diameter, and implementation standard number. Verify that the labeling matches the actual pipe.
3. Look at the Manufacturer
The manufacturer of steel pipes is also important to consider when selecting steel pipes. It is best to choose products produced by a reputable manufacturer for greater quality assurance.