Construction preparation before welding large-diameter steel pipes
1. Organize relevant operators, be familiar with construction drawings, rules, and regulations, formulate welding procedures, and prepare to weld operation instructions.
Second, the welder should carry out the training of the corresponding project and have the operation qualification certificate of the corresponding project.
3. Check whether the roundness and wrong-edged quantity of the incoming steel pipe meet the relevant technical requirements.
4. Check the surface of the metal pipes section for defects such as scars, cracks, and severe rust.
5. Before the installation of large-diameter steel pipes, pipe joints should be measured and numbered one by one. It is advisable to use butt welding of pipe joints with small differences in pipe diameters.