The quality control of Longitudinal welded pipe
is to safely carry out production operations and is also an indispensable element for protecting the personal safety of operators. The main application areas are: large-span grid engineering, construction steel structure engineering, power and EHV transmission and transformation projects, mechanical engineering, bridges, bridges, stations, airports, stadium steel structure engineering, municipal pipe network, foundation piling, water gas pipelines , highway construction and other ancillary facilities.
1, according to the welding process specification, check the wire and flux specifications are correct, to prevent welding wire and flux caused by improper welding quality accidents.
2, the welding environment to monitor, when the welding environment is not good (temperature below 0 degrees, relative humidity greater than 90%) should take the appropriate welding measures.
3, first test the groove size, including clearance, blunt edge, wrong mouth and staggered mouth and other process requirements.
4. It is correct to select the process parameters such as internal and external welding current, welding voltage and welding speed automatically during submerged arc welding.
5. Supervise the welding staff inside and outside the submerged arc welding, make full use of the length of the side arc plate of the steel pipe, strengthen the use efficiency of the welding inside and outside the arc, and improve the welding quality of the pipe end.
6. Supervise whether the welding staff has completely processed the joints and whether there are any dirt, rust, slag, water, paint and other dirt at the joints during the first slag cleaning.