1、 Cracking or cracking in welding of C-section steel products

造成缘故：1、加工过程中原材料薄厚总宽不平稳。造成假焊或假焊; 2、电焊焊接时挤压成型幅度不足，焊接结合欠佳。

The causes are as follows: 1. The thickness and width of raw materials are not stable. Results in false welding or false welding; 2. Insufficient extrusion forming range and poor welding combination.

二、商品弯折不符合规定

2、 The bending of goods does not meet the requirements

造成缘故：1、无缝钢管壁厚不匀(原材料薄厚不匀称或由生产制造所造成); 2、轧辊直徑的不一样造成无缝钢管形变不匀，造成弯折。

The causes are as follows: 1. The wall thickness of seamless steel pipe is not uniform (the thickness of raw material is uneven or caused by production); 2. The deformation of seamless steel pipe is uneven due to the difference of roll diameter, resulting in bending.

三、商品规格起伏很大

3、 The specifications of the goods fluctuate greatly

造成缘故：1、在调整轧辊时实际操作不善; 2、扎扎实实速率过快，造成规格起伏很大。

The causes are as follows: 1. The actual operation is not good when adjusting the roller; 2. The speed of down-to-earth work is too fast, resulting in large fluctuation of specifications.

四、商品横截面毛边状况比较严重，造成“耗子小尾巴”

4、 The tail of the product is relatively small in cross section

造成缘故： 1、裁切刃口变钝，使空隙过大非常容易残余;木工锯片迟缓，或安裝不善也非常容易造成毛边的造成; 2、焊接钢管时焊接上有挤压不必要金属材料。电焊焊接规章制度不标准也会让裁切时更非常容易留有毛边。

The causes are as follows: 1. The cutting edge becomes blunt, which makes the gap too large and easy to remain; the wood saw blade is slow or not properly installed, which is also very easy to cause burr; 2. When welding steel pipe, unnecessary metal materials are extruded on the welding. Non standard welding rules and regulations will make it easier to leave burr when cutting.

五、焊接表层不整平，凸凹显著

5、 The welding surface is not smooth and convex

造成缘故： 1、焊接凸出，焊接刨削深层偏深，造成平整度减少。 2、焊接内凹，焊接刨削深层偏浅。

Causes: 1, welding protruding, welding planing deep depth, resulting in flatness reduction. 2. Welding concave, welding planed deep shallow.

六、方钢管或矩形方管R角不匀称

6、 The R-angle of square steel tube or rectangular square pipe is not symmetrical

造成缘故：生产制造实际操作不善

Cause: the actual operation of production and manufacturing is not good

七、管身存有接焊状况

7、 There is welding condition in the pipe body

造成缘故： 在加工过程中，原材料要以卷装开展放卷机冷轧，每卷原材料无插口，以便可以持续生产，需在两卷原材料首末相电焊焊接。

Causes: in the process of processing, the raw materials should be cold rolled by the unwinder in the form of coils. There is no socket for each coil of raw materials, so that continuous production can be carried out. Therefore, it is necessary to weld the two coils of raw materials in the first and last phases.

八、端口号锯切不齐整，歪斜或凸凹不平。

8、 The port number is uneven, skew or uneven.

造成缘故： 在裁切时造成裁切形变促使端口号参差不齐。

Cause: in the cutting deformation caused by cutting, resulting in uneven port number.一、C型钢制成品焊接裂开或裂开

1、 Cracking or cracking in welding of C-section steel products

造成缘故：1、加工过程中原材料薄厚总宽不平稳。造成假焊或假焊; 2、电焊焊接时挤压成型幅度不足，焊接结合欠佳。

The causes are as follows: 1. The thickness and width of raw materials are not stable. Results in false welding or false welding; 2. Insufficient extrusion forming range and poor welding combination.

二、商品弯折不符合规定

2、 The bending of goods does not meet the requirements

造成缘故：1、无缝钢管壁厚不匀(原材料薄厚不匀称或由生产制造所造成); 2、轧辊直徑的不一样造成无缝钢管形变不匀，造成弯折。

The causes are as follows: 1. The wall thickness of seamless steel pipe is not uniform (the thickness of raw material is uneven or caused by production); 2. The deformation of seamless steel pipe is uneven due to the difference of roll diameter, resulting in bending.

三、商品规格起伏很大

3、 The specifications of the goods fluctuate greatly

造成缘故：1、在调整轧辊时实际操作不善; 2、扎扎实实速率过快，造成规格起伏很大。

The causes are as follows: 1. The actual operation is not good when adjusting the roller; 2. The speed of down-to-earth work is too fast, resulting in large fluctuation of specifications.

四、商品横截面毛边状况比较严重，造成“耗子小尾巴”

4、 The tail of the product is relatively small in cross section

造成缘故： 1、裁切刃口变钝，使空隙过大非常容易残余;木工锯片迟缓，或安裝不善也非常容易造成毛边的造成; 2、焊接钢管时焊接上有挤压不必要金属材料。电焊焊接规章制度不标准也会让裁切时更非常容易留有毛边。

The causes are as follows: 1. The cutting edge becomes blunt, which makes the gap too large and easy to remain; the wood saw blade is slow or not properly installed, which is also very easy to cause burr; 2. When welding steel pipe, unnecessary metal materials are extruded on the welding. Non standard welding rules and regulations will make it easier to leave burr when cutting.

五、焊接表层不整平，凸凹显著

5、 The welding surface is not smooth and convex

造成缘故： 1、焊接凸出，焊接刨削深层偏深，造成平整度减少。 2、焊接内凹，焊接刨削深层偏浅。

Causes: 1, welding protruding, welding planing deep depth, resulting in flatness reduction. 2. Welding concave, welding planed deep shallow.

六、方钢管或矩形方管R角不匀称

6、 The R-angle of square steel tube or rectangular square pipe is not symmetrical

造成缘故：生产制造实际操作不善

Cause: the actual operation of production and manufacturing is not good

七、管身存有接焊状况

7、 There is welding condition in the pipe body

造成缘故： 在加工过程中，原材料要以卷装开展放卷机冷轧，每卷原材料无插口，以便可以持续生产，需在两卷原材料首末相电焊焊接。

Causes: in the process of processing, the raw materials should be cold rolled by the unwinder in the form of coils. There is no socket for each coil of raw materials, so that continuous production can be carried out. Therefore, it is necessary to weld the two coils of raw materials in the first and last phases.

八、端口号锯切不齐整，歪斜或凸凹不平。

8、 The port number is uneven, skew or uneven.

造成缘故： 在裁切时造成裁切形变促使端口号参差不齐。

Cause: in the cutting deformation caused by cutting, resulting in uneven port number.