Which products are produced in class C factories, and which products belong to class D or E plants?
1. Liquids with a flash point of less than 28 ℃ in Class A plant; for example: hexane, pentane, naphtha, cyclopentane, carbon disulfide, benzene, toluene, methanol, ethanol, ether, methyl formate, methyl acetate, ethyl nitrate, gasoline, acetone, propylene, spirits with an alcohol content of 38 degrees or more.
2. Class E articles are not combustible, do not catch fire, do not tipsy, and do not carbonize. Such as: steel, aluminum, glass and its products, enamel products, ceramic products, incombustible gas, glass wool, rock wool, ceramic wool, aluminum silicate fiber, mineral wool, gypsum and its paperless products, cement, stone, expanded perlite.
Class C: 1 liquids with a flash point greater than or equal to 60 ℃, and 2 combustible solids.
Category C: liquid combustible solids with a flash point greater than or equal to 60 ℃ Class D: non-combustible articles Category E: non-combustible articles Note: when different fire hazardous materials are stored in any fire prevention zone of the same warehouse or warehouse, the fire risk of the warehouse or fire prevention zone shall be determined according to the category with the greatest risk.
5. The following plants belong to Class D: 1. The production of non-combustible materials that often produce strong radiant heat, sparks or flames at high temperature or melting. 2. Various production in which gases, liquids and solids are used as fuels or gases and liquids are burned for other purposes.
Design Essentials of Industrial Lighting
The basic elements of lighting design are: illuminance determination: industrial building illuminance standard is determined according to “Industrial Enterprise Lighting Design Standard” TJ34-79; civil building illuminance, before the national standard is promulgated, should be selected according to the “Building Electrical Design Technical regulations” according to the use requirements.
Led lamps and lanterns design key points first of all, about the lamps and lanterns design principles, to take into account the optical design of lamps and lanterns as well as its materials and costs, which is a very important link, followed by the aesthetic degree. Everyone likes beautiful things, LED lamps and lanterns are furniture supplies, naturally its appearance and shape is also very important.
Article 0.3 in addition to abiding by this standard, the lighting design of industrial enterprises shall also comply with the requirements of the relevant national standards and norms. Chapter II Lighting methods and Lighting types Article 0.1 Lighting methods can be divided into general lighting, zonal general lighting, local lighting and mixed lighting.
What are the requirements for the installation height of general lighting in the factory building
In the substation, lamps and lanterns should not be installed directly above the high-voltage and low-voltage distribution equipment and bus. The height of the lamps and lanterns installed outdoors should not be less than 3 meters from the ground; when installed on the wall, the height from the ground should not be less than 5 meters.
General open lamps and lanterns, the distance from the lamp holder to the ground is not less than the following values (except when using voltage): (1) outdoor: 5m (installed on the outdoor wall); (2) factory building: 5m / 3) indoor: 2m / 4) soft cable with elevator lamps and lanterns after the cable is unfolded: 0.m.
According to the “Urban Road Lighting Design Standard (CJJ45-2015)”, the relationship between the light distribution type, layout and installation height and spacing of lamps and lanterns in Table 3 is as follows: Weff refers to the effective width of the road surface; the distance between S lamp poles; H refers to the installation height.
It shall be carried out in accordance with the regulations of the national electrical installation regulations. You can participate in the designated legal low-voltage electrician training to get the specific application size details in the detailed regulations.
Indoor lamps and lanterns shall not be less than 4 meters from the ground and outdoor lamps and lanterns shall not be less than 3 meters.
Installation height of fire emergency lights: in general places, the installation height of fire emergency lights is about 2 ~ 5 meters. Evacuation exits with a height of more than 4 meters can install fire emergency lights on the edge of the exit door. The installation of fire emergency lights in the aisle can be installed at 20 meters each.
Functional principle people will have different feelings in different environments, and human eyes will have different psychological feelings about light, shade and color.
Lighting design principle 1) aesthetic principle lighting design is an important means to decorate, beautify the environment and create an artistic atmosphere. In order to decorate and beautify the space, increase the sense of space layers and render the corresponding space atmosphere, it is very important to use decorative lighting.
Indirect lighting can be said to be a more flexible and interesting design element, can become the catalyst of the atmosphere, is the focus and theme of the room, but also can enhance the hierarchical sense of the existing decoration. Generally speaking, lighting arrangement can be divided into direct and indirect.
Beauty when we decorate the home, we all attach great importance to the aesthetics of the home design, because a beautiful design is the “facade” of our home! Therefore, when we design household lighting, the directivity of lighting light should not be too strong, so as not to cause heavy shadows and blunt shapes.
The third advanced method of lighting design is no main lamp lighting, abandon the single main light source, evenly arrange different light sources on the wall, roof and ground, and use the method of local lighting of basic lighting to make your home both bright and layered.