Key technical specifications.

1. Nominal dimensions: Outer diameter D = 20 mm, wall thickness t = 1 mm, inner diameter ≈ 18 mm.

2. Theoretical mass per meter: approximately 0.50 kg/m (with a weight increase factor of 1.064 for galvanized coating; calculated using the formula for carbon steel welded pipes).

3. Common standard lengths: 6 meters/piece (standard in stock), can be cut to desired lengths upon request.

4. Base material: The predominant type is Q235B low-carbon steel, with a small amount of 20# seamless carbon steel.

5. Galvanization process: Includes hot-dip galvanization (the main method) and electroplated galvanization (cold galvanization, suitable only for indoor use).