I believe you are very familiar with this project. We can see it on many engineering sites. Because the role of steel structure is very large, we must pay attention to various matters when working, because it is difficult to deal with the problems found in the later stage, so today we will learn what matters should be paid attention to when steel structure is welded?

steel structure

1.The best voltage is not selected in welding construction

During welding, the same arc voltage is selected regardless of the size of groove, whether it is backing, filling, covering, or groove size, which may not meet the required penetration and width, resulting in undercut, porosity, splash and other defects.

2.The arc length is not controlled during welding

During welding, the arc length is not properly adjusted according to the groove form, welding layer number, welding form and electrode type.Due to improper use of welding arc length, it is difficult to obtain high quality weld.

3.The weld leg size of joint butt joint or fillet butt joint with penetration required is not enough

T-joint, cross joint, corner joint and other butt or fillet joint joint that require penetration, the weld leg size is not enough, or the design of crane beam or similar components of the web and the upper flange flange weld leg size is not enough, will make the welding strength and stiffness can not meet the design requirements.

4.If the welding slag is not removed and the weld surface is defective, the lower layer welding shall be carried out

In the multi-layer welding of thick plate, the welding of the lower layer is carried out directly without removing the welding slag and defects after the welding of each layer. It is easy to cause the defects such as slag inclusion, air hole and crack in the welding seam, which will reduce the connection strength and cause the spatter during the welding of the lower layer.

   The above points are the steel structure in the welding needs to pay attention to, these points are must pay attention to, to avoid more accidents, must pay attention to, today’s small editor will tell you here, want to know more information, welcome to visit our website for detailed understanding.