1. Slotting of tubesheet
There are three slotting methods: one plate slotting method, two plate slotting methods and four plate slotting methods. There are two methods: manual slotting and mechanical slotting.
The recommended sealant for energy-saving silencing ventilation duct system includes two kinds of thermal adhesive tape and pressure-sensitive adhesive tape. Before the pipe is sealed with tape, a special pickpocketing binding needle shall be used to fix the connection of the pipe, and the distance between the binding needles shall be 150 mm. When binding, the binding needle should be slightly angled with the seam. The binding pin is only used to fix the interface of the cover tongue. If there is no cover tongue or flat interface, fix it with adhesive tape. The large adhesive tape is 300mm and there is at least one on both sides.
When the static pressure load in the ventilation duct system causes 1% deflection of the glass fiber ventilation duct wall, the ventilation duct must be strengthened. Generally, the pipes of energy-saving and silent ventilation duct system can be reinforced by the following methods:
A. The tie rod reinforcement method with steel color and sleeve reinforcement usually adopts positive pressure reinforcement below 500pa.
B. The frame reinforcement method is light steel keel reinforcement.
(C) Locking reinforcement method, i.e. light steel keel reinforcement, is used for tie rod reinforcement and frame reinforcement, and can not be used for 900 elbow, tee pipe, stuffy pipe and other special pipes.
(D) Anti sag reinforcement method is used for the reinforcement of special pipelines, such as variable pipeline reinforcement and circuitous pipeline reinforcement.
4. Repair damage
The slight sealing of the pipe can be repaired with a special surface damage agent. Schuber slightly has a pipe repair surface glue. If it can be used, it will be damaged. If the surface layer is qualified with aluminum foil, the damaged layer shall be selected, the aluminum foil on the pipe surface shall be insulated, and the external aluminum foil of the pipe shall be repaired with glass fiber.
If the damage will be pressed down, the thermal insulation of the open coating and cutting interface can be left. The surrounding interface can be sealed and the wall can be repaired, so as to cut the glass plate interface male and the glass fiber of the pipe according to the selected male of the female and the standard layer. If the replacement and normal repair of the pipeline are required, the ventilation pipe that is relatively more in operation may be damaged and the system will operate in a large area, the damage will be large, and the normal pipeline of the system will be seriously affected.