9.3.9 strong bar. The exhaust system that excludes gases, vapors and dusts with combustion or explosion hazards should comply with the following regulations:
1 The exhaust system should be equipped with a grounding device that conducts static electricity; static electricity grounding reduces the possibility of explosions caused by static electricity.
2 Exhaust equipment should not be placed in underground or semi-underground buildings (rooms); dangerous gases accumulate underground, which is more dangerous.
3 The exhaust pipe should be made of metal pipes and should lead directly to a safe outdoor location and should not be hidden. Concealed installations are inconvenient for inspection and maintenance.
html Article 39.3.10 states that the gap between pipes that exclude and transport air or other gases with temperatures exceeding 80°C and flammable debris should not be less than 150mm from flammable or refractory objects, or should be separated by non-combustible materials with a thickness of not less than 50mm. Heat; when arranged on a pipe, the one with a higher surface temperature should be arranged above. The gaps and measures taken here still need to be remembered.
9.3.11 strong bar. The air ducts of ventilation and air conditioning systems should be equipped with fire dampers with a nominal operating temperature of 70°C at the following locations:
1 where they pass through the fire protection zone; to prevent the spread of fire in different fire protection zones.
2 Passes through room partitions and floors in ventilation and air-conditioning rooms;
3 Passes through room partitions and floors in important or fire-risk places;
4 Passes through both sides of the deformation joints of fire partition walls;
5 Vertical air duct On the horizontal pipe section at the intersection with the horizontal air duct on each floor.
Note: When the ventilation and air conditioning systems of each fire protection zone in the building are set up independently, the fire damper does not need to be installed at the junction of the horizontal air duct and the vertical main pipe.
Here are the locations where fire dampers need to be installed. Each item is very important. Remember it as common sense, and it is often tested in exams. If you encounter the corresponding drawing in actual work, remember to compare the position of the drawing with the provisions here.
