专注通风管道加工·排烟罩

1, check whether the material and specifications meet the design requirements, material proof and certificate are complete, there are cracks, shrinkage, wrinkle, delamination and other defects, should be refused to use.

2、焊条要求：焊接碳素钢的焊条采用E4303焊条，焊接16Mn钢板的焊条采用E5016焊条。当16Mn钢与碳素钢接缝处E4316焊条。焊条使用之前，应按说明书进行烘干，并在使用中保持干燥，焊条药皮应无脱落和明显裂纹。

2, electrode requirements: welding carbon steel electrode used E4303 electrode, welding 16Mn steel plate electrode E5016 electrode. E4316 welding rod at the joint of 16Mn steel and carbon steel. Before welding electrodes are used, they should be dried according to the instructions, and be kept dry in use.

3、卷焊管材壁厚≥ 6mm应在下料时，打好坡口，用坡口机加工坡口。

3. If the thickness of the welded pipe is more than or equal to 6mm, the groove should be formed when the material is cut off and the groove is machined with the beveling machine.

4、先做压头处理，再进行卷制。

4, first do pressure head treatment, and then roll up.

5、根据卷管直径制作校圆样板，弧长为管子周长的1/6～1/4，不贴合间隙符合规定要求。

5, according to the diameter of the reel, make the calibration template. The arc length is 1/6 to 1/4 of the circumference of the pipe, and the gap is not in conformity with the specified requirements.

6、管子、管件组对时，应检查坡口质量。并对坡口内外侧进行清理，有锈垢可采用砂轮机磨光。

6, when the pipe and fittings are set, the quality of the groove should be checked. The inner and outer sides of the groove are cleaned up, and the rust scale can be worn by the grinding machine.

7、壁厚不同的管子对焊时，两管壁厚之差不得大于管壁厚度的15%，并不得超过3mm。

7. When butt welding with different wall thickness, the difference of the thickness of the two tube wall shall not be greater than 15% of the wall thickness and shall not exceed 3mm.

8、不同直径的管子对焊时，可将大管焊接端抽条加工成大小头，也可采用钢板制作大小头。

8. Butt welding of pipes with different diameters can produce large ends of welded ends of large tubes and large heads made of steel plates.

9、正式施工焊的材料焊接工艺相同。

9. The welding technology of the formal construction welding is the same.

7、一般先涂刷二道红丹酚醛防锈漆，再涂刷两道各色油性调和各种磁漆。

7, generally brush two red Dan phenolic antirust paint, and then brush two colors of oil and all kinds of varnish.

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