1.
Steel pipe: Q235 welded steel pipe with an outer diameter of 48mm and a wall thickness of 3.
5mm (formerly No.
3 killed steel) shall be used, and its chemical composition and mechanical properties shall comply with the requirements of the current national standard “Carbon Structural Steel” (GB/T 700-2006); The surface of the steel pipe should be coated with anti rust paint, and there should be no defects such as rust, bending, cracks, etc.
.
