方管顧名思義是一種方形的鋼管，它是工業建筑行業普遍的一種材料，那您知道濟南方管焊接中的質量問題有什么嗎？

As the name implies, square tube is a square steel tube, which is a common material in the industrial construction industry. Do you know what the quality problems in Jinan square tube welding are?

1)尺寸超過允許偏差：對于焊縫長度、寬度和厚度不足、中心線偏差、彎曲等偏差，應嚴格控制焊接部位的相對位置和尺寸，合格后才能進行焊接，焊接時應小心操作。

1) The size exceeds the allowable deviation: for the deviation of insufficient weld length, width and thickness, centerline deviation, bending, etc., the relative position and size of the welding parts shall be strictly controlled. Welding can be carried out only after they are qualified, and careful operation shall be taken during welding.

2)焊縫裂紋：為防止裂紋，應選擇合適的焊接工藝參數和焊接程序，避免大電流，不要突然熄火。焊縫應重疊10~15毫米，焊接時不得移動或敲擊焊件。

2) Weld crack: in order to prevent cracks, appropriate welding process parameters and welding procedures should be selected to avoid high current and sudden flameout. The weld shall overlap 10~15mm, and the weldment shall not be moved or knocked during welding.

3)表面氣孔：焊條應在規定的溫度和時間下烘烤，焊接區域應清潔。焊接過程中，應選擇合適的焊接電流，降低焊接速度，使熔池中的氣體完全逸出。

3) Surface porosity: the electrode shall be baked at the specified temperature and time, and the welding area shall be clean. During welding, appropriate welding current shall be selected to reduce the welding speed so that the gas in the molten pool can escape completely.

4)焊渣夾雜物：多層焊接時應逐層清除焊渣，操作要正確，弧長要合適。注意爐渣的流向。使用堿性焊條時，須留下熔渣。

4) Welding slag inclusion: during multi-layer welding, the welding slag shall be removed layer by layer, the operation shall be correct, and the arc length shall be appropriate. Pay attention to the flow direction of slag. When using alkaline electrodes, slag must be left behind.

此外選購時，選擇質量好的方管才能提高制造產品的質量，而且質量好的方管還可以提高安全系數。您有什么需求就來咨詢我們http://m.yuancloud.cn吧！

In addition, the quality of manufactured products can be improved by selecting square tubes with good quality, and the safety factor can also be improved by selecting square tubes with good quality. Please consult us if you have any needs http://m.yuancloud.cn Come on!