Building explosion protection 1. Definition of explosion dangerous area The explosive dangerous area is divided into explosive gas environment and explosive dust environment according to the material state in the place. 2. General layout of buildings with explosive hazards 1) Class A and B factories with explosion risk should be set up independently. 2) The general control rooms of Class A and B factories with explosion risk should be set up independently, and the sub-control rooms should be set independently. When the fire resistance limit is not less than 3.00h, the fire-proof partition wall can be set up adjacent to the outer wall when it is separated from other parts. 3. Plane layout of workshops with explosive hazards 1) Production sites of Class A and Class B with explosion risk should be located near pressure relief facilities of single-storey factory buildings near exterior walls or those of multi-storey factory buildings near exterior walls at the top. 2) The equipment with explosion danger should avoid the arrangement of main bearing parts such as beams and columns. 3) In the staircase, outdoor staircase or adjacent area of explosion dangerous area, door bucket and other protective measures should be set up.The partition wall of the door bucket adopts a fireproof partition wall whose fireproof limit is not less than 2.00h. The door adopts a class A fireproof door and is misaligned with the door of the stairwell. 4) No office or lounge shall be arranged in class A or B workshops with explosive danger.If it must be installed next to the factory building, the fire resistance level of the building shall not be lower than the second level, and non-combustible protective walls with a fire resistance limit of not less than 3.00h shall be used to separate and install safety exits through outdoor or evacuation stairs. 5) Ventilation equipment for exhaust systems that exclude dangerous gases, vapors and dust from combustion or explosion shall not be installed in underground or semi-underground buildings (rooms). 4. Explosion-proof measures adopted 1) Class A workshops which emit heavier air combustible gases, combustible vapors and Class B workshops which are in danger of dust and fibre explosion are ground.When equipped insulating with material non-sparking is used as integral surface layer, anti-static measures should be taken.Ground ditches should not be installed in the factory building, and the cover plate should be tight when it is really needed. The effective measures to prevent the accumulation of combustible gases, combustible vapors, dust and fibers in the ditches should be taken, and the fireproof materials should not be used to seal the links with the adjacent factory buildings. 2) The floor of the workshop which emits combustible dust and fibers should be smooth, smooth and easy to clean. 3) The pipes and ditches of factories using and producing Class A, B and C liquids should not be connected with the pipes and ditches of adjacent factories. Oil isolation facilities should be set up in sewers to avoid combustion and explosion accidents caused by liquid flowing or dripping into underground pipes and ditches when confronted with fire and endanger adjacent factories. 4) The liquid warehouses of Class A, B and C are equipped with facilities to prevent liquid dispersion, such as building slow slopes with a height of 150-300 mm at the entrance of barreled warehouses, or building threshold with a height of 150-300 mm at the entrance of warehouses, and then filling sand on both sides of the threshold to form slow slopes for easy loading and unloading. 5) The warehouse of goods which will explode in the case of dampness should take measures to prevent water immersion, such as making the indoor ground higher than the outdoor ground, tightly covering preventing the the roof leakage of the warehouse, of rainwater, and sheltering the warehouse shelter for loading and unloading such goods. 5. Pressure relief facilities 1) Open or semi-open type should be adopted in class A and B workshops with explosion risk, and reinforced concrete or steel frame and bent structure should be adopted in load-bearing structures. 2) The material of pressure relief facilities should be lightweight roof panels, lightweight walls, doors and windows which are easy to relieve p