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    Control technique on welding quality of welded pipe


    The quality of the welded pipe to control, to safety in production operation, but also to protect the inevitable elements of the personal safety of the operator. Applications mainly in the large span grid project, building steel structure engineering, power and ultra high pressure transmission and distribution engineering, mechanical engineering, cross sea bridge, bridges, (railway station, airport, Stadium Steel Structure Engineering), the municipal pipe network, foundation piling, water and gas pipelines and road construction and other supporting facilities.

    1, according to the welding procedure for review of welding wire and flux of the specification is correct to prevent misuse of welding wire and flux caused by welding quality accident.

    2, the welding environment supervision, when the welding environment is not good (temperature below 0 degrees Celsius, relative humidity is greater than 90%), the corresponding measures should be taken after the welding.

    The first groove size 3, pre inspection before welding, including clearance, edge, angle and the wrong port meets the technical requirements.

    4. The welding current, welding voltage, welding speed and other parameters are correct in the process of automatic welding of the submerged arc.

    5, supervision of welding personnel in the submerged arc automatic welding, fully use the pipe end of the arc plate length, to strengthen the internal and external welding arc plate use efficiency, which helps to improve the quality of pipe end welding.

    Welding 6, supervision personnel in the repair welding is the slag cleaning clean, whether it has a thorough treatment of joints and groove whether there is oil, rust, slag, water, paint, etc. the dirt.