Shenyang ventilation pipeline The processing process mainly includes the following points:

1. Picking → distinguishing air duct sections according to the drawing → opening blanking → shearing → chamfering, etc.

2. The air duct of this project is connected by flange.

three Ventilation duct Before processing, it is required to check whether the selected data can meet the quality requirements, whether there is a factory certificate or quality document, and whether the document is submitted for inspection.

4. Angle steel flange manufacturing: the same drilling method shall be used for flanges of the same specification, so that the flanges have certain interchangeability. After the completion of flange manufacturing, anti-corrosion and oil painting shall be stopped as soon as possible, and the flange shall be placed evenly according to different specifications.

5. The flange matched with the equipment shall be intermittently matched after the equipment arrives at the site, the blanking and drilling shall be conducted, or the flange shall be intermittently processed according to the accurate detail drawing provided by the manufacturer.

6. The processing of ventilation pipes shall be interrupted in the processing site. The place shall be waterproof and rain proof to prevent the air duct from rusting when encountering water; The site shall be flat and free of mud to prevent air duct pollution.

7. The air duct seaming method is as follows: the single seaming method is used for steel plate splicing, and the combined corner seaming method is used for the four corners of rectangular air duct or accessories; The circular air duct shall be vertical seamed.

8. Foldable connection shall be selected for the connection of each air duct section, and the length of the duct section shall be 1.8~2.0m, and some smaller air ducts can be appropriately lengthened. The length of the practical air duct shall be summarized and considered intermittently according to the requirements of the device parts. Each continuous duct section in the air duct system shall reserve a dispatching section whose length is 200mm longer than that of the original air duct.

9. When the galvanized iron sheet of the air duct is riveted to the flange, the rivet shall be straight to the flange surface. During core pulling, the rivet shall tightly press the iron sheet and flange without gap, and the rivet distance shall not be greater than 150mm.

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