Quality Control of LSAW Steel Pipe before Welding

Quality control of lsaw steel pipe before welding is:
1) First, make a good quality of raw materials, after passing inspection before being officially entered the construction site, and resolutely put an end to the use of substandard steel.
2) Followed by the management of welding materials. Check whether the welding materials for qualified products, storage and baking system whether to perform, whether to issue a weld surface clean and free of rust, electrode coating is intact, with or without mildew.
3) Once again, clean weld zone management. Cleaning QA weld zone, without water, oil, rust and dirt oxide film, which is to prevent external weld defects produced an important role.
4) Select the appropriate welding method should be implemented first test welding, after welding principles.