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Flange production of heating ventilation pipe production line manufacturers
- 2019-11-05-

Duct flange production

I. Process requirements


1. The air pipe flange is processed by the mold method, and the flange of the same model uses a mold to ensure the interchangeability and dimensional accuracy of the flange;

2. After cutting and straightening, it should be chamfered, punched, and then clamped and welded on the corresponding mold.

3. The allowable deviation of the flatness of the flange is 1mm, and the difference between the two diagonal lines of the rectangular flange should not be greater than 2mm;

4. There must be screw holes at the four corners of the flange. The distance between the bolts and rivet holes of the air pipe flange of the medium and low pressure system should not be greater than 150mm; the high pressure system should not be greater than 100mm;

5. After the flange is formed, straighten the flange, and after cleaning the welding slag, apply two anti-rust paints to the welded part and one silver paint.

Key points of quality control


1. When cutting the flange angle steel, care should be taken so that the inner diameter of the flange after welding cannot be less than the outer diameter of the air pipe;

2. The welding seam of the air pipe flange should be well fused and full, without false welding and holes;

3. The screw hole arrangement of flanges of the same specifications processed in the same batch should be consistent and interchangeable;

4. For the anti-corrosion treatment of the air pipe flange, the next anti-corrosion treatment should be performed after the previous paint is dried;

5. It is strictly forbidden for unlicensed personnel to apply for welding;

Three. Finished product protection measures



1. The semi-finished products and finished products of the air duct flange must be neatly placed on the square wood, and they should be placed according to the specifications and types.

2, not mixed with other materials, equipment, etc., and have rain and snow protection measures;

3. When finished product air pipe flanges are stacked for a long time, they should be covered with plastic film to keep the surface clean and avoid dust accumulation;

4. Handling should be handled with care. Do not damage the galvanized layer of the flange. If it is scratched, it should be completely painted.


Foshan Shengya Automatic Equipment Technology Co., Ltd.'s main duct production line, heating duct production line, spiral circular duct machining equipment, automatic duct manipulator equipment, automatic stack rewinding equipment and other machinery are welcome to come advisory!