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Air duct area calculation
2024/10/31
1, the area of the air duct calculation formula: round tube F=π×D×L, the formula F-circular air duct expansion area (in ㎡); D- circular duct diameter; L- Length of pipe center line. The circumference of the rectangular duct is multiplied by the length of the center line of the duct. The rule for calculating the surface area of the elbow of the ventilation pipe is to calculate the center line where the pipe extends to the intersection.
2, tee: the length of the air duct is subject to the length of the center line (the main pipe and the branch pipe are divided by the intersection of their center line), including the length of the elbow, tee, reducer, celestial circle and other pipe fittings, but shall not include the length of the parts. The diameter and circumference shall be expanded according to the size shown in the figure. The overlap of the bite has been included in the quota and shall not be increased.
Ventilation pipe installation precautions
1. When the air duct and the fan are connected, a soft joint should be added to the inlet and outlet of the air first, and its section size should be the same as the inlet and outlet of the fan. The hose joint can be made of canvas material, and its length is more than 200, and the tightness should be suitable.2, before the air duct and dust removal equipment is connected, it is also necessary to wait for the installation of this equipment, in fact, the drawings will be prefabricated and installed.
3, when installing the air duct inlet and outlet, it is necessary to open the hole when the air duct is prefabricated, and the air duct must be connected closely after it is installed.
4, when the moisture content is relatively large, the pipeline also needs to set the slope, the low point should be connected according to the drainage pipe, pay attention to the installation, the bottom of the air duct can not appear a longitudinal joint, if the joint must be sealed.
5, conveying flammable steel plate air duct, it is also necessary to install jumper wires at the connection, and it is also necessary to connect the electrostatic grounding network.
6, when the horizontal air duct reaches more than 4m, then the installation personnel must be tied to the safety belt in advance, the scaffold is also fixing its diving board, the width must meet the safety specifications to prevent tools and other things from falling and injuring people.
