six steps for quality control of the lsaw steel pipe

by:ChangZeng     2020-05-29
The quality control of LSAW steel pipe is not only the guarantee of safe production and operation, but also the inevitable factor to ensure the safety of operators.
The main application areas are long-span space tru. . .
The quality control of LSAW steel pipe is not only the guarantee of safe production and operation, but also the inevitable factor to ensure the safety of operators.
The main application areas are long-
Span space truss engineering, construction steel structure engineering, power and outsourcing
High Voltage Transmission and Distribution Engineering, Mechanical Engineering, crossover
Sea Bridge, Bridge ,(
Railway station, airport, stadium steel structure Project)
Supporting facilities such as municipal pipelines, foundation piling, water and gas pipelines and road construction.
1. according to the welding process specifications, review the specifications of filled metal and flux to prevent quality accidents caused by the misuse of welded filled metal and flux.
2. supervise the welding environment, and when the welding environment is not good (
The temperature is below 0 and the relative humidity is above 90%)
Corresponding measures should be taken before welding.
3, before welding, the size of the welding slot, including clearance, blunt edge, angle, hi-
Lo meets process requirements.
4. check the welding current, welding voltage, welding speed and other parameters in the process of automatic submerged arc welding.
5. supervision, in the process of automatic submerged arc welding inside and outside, the welding personnel make full use of the length of the steel pipe arc plate to strengthen the efficiency of the inner and outer welding arc plate, which helps to improve the quality of the straight seam steel pipe welding.
6. when repairing and welding, the supervisor will clean up the welding slag first, check the joint for thorough treatment, and confirm whether there is oil, rust, slag, water, paint and other dirt at the groove.
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