How to ensure the welding quality of galvanized pipes

1. Human factors are the focus of gas galvanized pipe welding control. Due to the lack of necessary post-weld control methods, it is easy to cut corners and affect the quality; at the same time, the welding particularity of galvanized pipes makes it difficult to ensure the welding quality. Therefore, before the project starts, a skilled welder who holds the corresponding boiler pressure vessel or equivalent welder certificate should be selected to carry out necessary technical training and explanation, and conduct on-site welder assessment and approval according to the boiler situation. Pressure vessel welder examination rules. Allow access to the welding site. It shall not be changed at will to ensure that the welders of the welding pipeline are relatively stable.

2. Welding material control: Ensure that the purchased welding materials come from regular channels, have quality assurance certificates and certificates, and meet the process requirements; the acceptance, sorting, and distribution procedures of welding materials must be regular and complete, and the welding rod head recovery control must be strictly controlled to ensure the flow direction and quantity: welding materials must be strictly baked according to the process, and the amount of welding materials shall not exceed half a day.

3. Welding machine: The welding machine is a welding tool, and its performance must be reliable and meet the process requirements; the welding machine must have qualified current and voltage meters to ensure the correct implementation of the welding process. The welding cable should not be too long, and the welding parameters should be adjusted if it is too long.
4. Welding process method: Ensure strict implementation of the special operation method for galvanized pipes, perform pre-welding groove inspection according to the welding process, control welding process parameters and operation methods, check the appearance quality after welding, and add non-destructive testing after welding if necessary. Control the welding level and the amount of welding consumables for each pass.
5. Welding environment control: Ensure that the temperature, humidity and wind speed during welding meet the process requirements. Welding is not allowed without conditions.