Many manufacturers experienced such experience. After the ductile iron rain grate was transported to the supplier, the appearance design and appearance of the rain grate were in and out of the size of the drawing, and some even had serious deformation. For example, the edging strip is bent and deformed, the straight line difference is very large, and the transverse bar is open welded. This is the deformation of the rain grate. At this time, the supplier usually subjectively evaluates that the quality of the goods produced by the manufacturer is poor, and more serious disputes will continue to arise.

Ductile iron rain grate

How to prevent the deformation of ductile iron rain grate?

1. When the rain grate is welded, the flat steel shall be straightened before welding.

2. Before pickling passivation and hot-dip galvanizing, the internal stress of rainwater grate shall be removed to solve this problem, which is generally not easy to cause in the industrialized production of intelligent chemical industry.

3. At least three rainwater grate bases should be placed on both sides and in the middle. Do not only put them on both sides but not in the middle. More rain grates pressed on the upper side will cause deformation and make them more and more different from the same level surface.

4. It shall be placed stably in the whole process of transportation to make its bearing force uniform. It is not easy to beat hard during loading and unloading. It shall be lifted and placed with care to ensure that the rain grate is not easy to deform

How can ductile iron rain grate deform?

1. When the rain grate is treated with hot-dip galvanized metal surface, the rain grate will also be deformed in case of high temperature. If the rain grate has strong internal stress after welding, serious deformation will occur at this time.

2. For the internal stress in the base material of the rainwater grate, if the flat steel is not straightened when the rainwater grate is welded, the flat steel is immediately placed on the die for welding. It looks straight on the surface. In fact, the rainwater grate causes strong internal stress at this time. If a strong external force is added (such as high temperature, beating and extrusion), the internal stress will be mainly displayed, and the appearance design of the rain grate will become a standard bow.

3. During the transportation of rainwater grate, the beating, extrusion and collision shall be minimized.