河北保定不锈钢螺旋风管厂

1. pipe blanking

(1)应严格按照图纸进行，材料在切割前要仔细核对尺寸是否正确。

(1) it should be carried out in strict accordance with the drawings, and the material should be carefully checked to see if the size is correct before cutting.

(2)下料时，要避免出现材料浪费。

(2) material waste should be avoided.

(3)如果管道材质比较特殊的话，应先整体排料，然后再下料，以便控制好管子的用量。

(3) if the material of the pipe is very special, the whole material should be arranged in the whole, then the material should be reproduced, so as to control the amount of the pipe.

(4)如果使用不锈钢管，那么切割时应使用机械或者等离子切割，其余的可使用火焰切割。

(4) if stainless steel tubes are used, mechanical or plasma cutting should be used when cutting, and the rest can be cut by flame.

(5)切口端面的倾斜偏差，不能超过2毫米。

(5) the slanting deviation of the end face of the incision cannot exceed 2 millimeters.

2.坡口制备

2. groove preparation

应按照规范要求进行，连接主要是采用焊接。如果是中、低压管道坡口，宜采用V型；如果是高压管道，则采用YV型坡口。坡口加工应平整，没有任何缺陷。

It should be carried out according to the specification, and the connection is mainly by welding. If it is the slope of the middle and low pressure pipes, the V type should be adopted; if it is high pressure pipe, the YV type groove is used. The groove processing should be smooth, without any defects.

3.焊口组对

3. weld group pair

是对管道组对，在这之前要清理管道接口。

It's right to the pipeline group, and before that, clean the pipe interface.

4.管道预制

4. pipeline prefabrication

进行管道预制时，应有严格的预制允许偏差，而且预制件应按规定要求进行编号，以便进行质量控制。

When the pipeline is prefabricated, there should be strict prefabrication permissible deviation, and the preform should be numbered in accordance with the required requirements for quality control.

5.管道对接焊口的组对

Group pair of butt welded joints of 5. pipes

管道对接焊口的组对，应做到内壁齐平，且错边量不宜超过壁厚的10%。

The inner wall of the pipe butt weld should be flat, and the wrong side amount should not exceed 10% of the wall thickness.