The location and noise reduction treatment of ventilation ducts, fire dampers and fire partitions shall not exceed 200 mm.
In air ducts of elbows, tees and valves, fire dampers must be sparse and suspended. If the length of the suspended air duct exceeds 20 meters, anti-sway brackets should be added, which should not be added. less than A.
The hanging distance of the ventilation duct insulation pipe is 30mm, and the insulation edge distance of the insulation pipe is 30mm.
The insulation of the air duct should be flat, the flange should be individually insulated, and the insulation of the flange should be based on the quality of the pipe and pipe.
The straightness of the air duct is 3 per thousand, 2 per thousand, and the total defect does not exceed 20 mm. Level 9 air has a verticality of 3‰ and 2‰. Air-spun gongs must not presentobvious surface scratches or close contact.
The ground should be flat, the wind turbine vibration damper should be uniform, the compression gap should be less than 2mm, and the damper should not rest on the foundation.
The width of the conduit and flange should be between 6 and 9, and the contact should be tight and straight.
Continuing with the non-metallic air duct flange, the flange bolts should not exceed 120mm, the flange spacing is uniform, the flange plane is flat and the thickness of flange gasket is 3-5mm.
The length of fiberglass-reinforced plastic pipes exceeding 20 meters must be equipped with at least one fixed support. The length of fiberglass reinforced plastic air ducts exceeding 20 meters must be equipped with QSA and expansion joints.
Flexible fittings should be used in air ducts and the length of the pipe should notnot be less than the expansion joint width of 100 mm. 15. Rock wool, the insulating material of air ducts, should be packed in iron angles spaced 0.6 to 0.7 m apart.
The spacing between supports and supports for ventilation ducts less than 400 mm should not be more than 4 meters, and the spacing between supports and supports for air ducts greater than 400 mm must not be greater than 3 meters.
For vertically installed air ducts, the distance between supports should not exceed 4 meters, the glass tube should not exceed 3 meters, and each riser should be fixed at least 2 minutes.