方管顾名思义是一种方形的钢管，它是工业建筑行业普遍的一种材料，那您知道济南方管焊接中的质量问题有什么吗？

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)尺寸超过允许偏差：对于焊缝长度、宽度和厚度不足、中心线偏差、弯曲等偏差，应严格控制焊接部位的相对位置和尺寸，合格后才能进行焊接，焊接时应小心操作。

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)焊缝裂纹：为防止裂纹，应选择合适的焊接工艺参数和焊接程序，避免大电流，不要突然熄火。焊缝应重叠10~15毫米，焊接时不得移动或敲击焊件。

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)表面气孔：焊条应在规定的温度和时间下烘烤，焊接区域应清洁。焊接过程中，应选择合适的焊接电流，降低焊接速度，使熔池中的气体完全逸出。

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)焊渣夹杂物：多层焊接时应逐层清除焊渣，操作要正确，弧长要合适。注意炉渣的流向。使用碱性焊条时，须留下熔渣。

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.

此外选购时，选择质量好的方管才能提高制造产品的质量，而且质量好的方管还可以提高安全系数。您有什么需求就来咨询我们http://www.hhqhq.com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://www.hhqhq.com Come on!