Distance between Class C factories and Class C warehouses from 220 kV high-voltage lines
Thread Content
I would like to ask everyone: there is a high-voltage line at the edge of the factory area, and we plan to build a Class C factory building and a Class C warehouse there. Could you please tell us how far the factory building or warehouse should be from the high-voltage line? The height of the high-voltage poles is approximately 45 meters. According to Rule 3.1.7 of the stone regulations, for Classes A and B the factor is 1.5, while for Class C it is reduced by 25%; therefore the distance should be: 45*1.5*（1-0.25）=50.625m. However, according to building codes, 11.2.1: For Class A factories and warehouses, piles of combustible materials, storage tanks for Class A and B liquids, liquefied petroleum gas tanks, as well as tanks for combustible and oxidizing gases, the minimum horizontal distance from these elements to overhead power lines should be 1.5 times the height of the pole (tower). For storage tanks for Class C liquids, the minimum horizontal distance from such tanks to overhead power lines should be 1.2 times the height of the pole (tower). The minimum horizontal distance between overhead power lines of 35 kV or higher and liquefied petroleum gas storage tanks (areas) with a single tank capacity of more than 200 m3 or a total capacity of more than 1000 m3 should be 40.0 m. When the tanks are buried underground, this minimum horizontal distance can be reduced by 50%. There is no distance from Class C devices. I would like to ask everyone: if we follow the building codes (rather than the stone-related regulations), what distance should be maintained between Class C warehouses or production facilities and high-voltage power lines? Thank you!
I would like to ask everyone: there is a high-voltage line at the edge of the factory area, and we plan to build a Class C factory building and a Class C warehouse there. Could you please tell us how far the factory building or warehouse should be from the high-voltage line? The height of the high-voltage poles is approximately 45 meters. According to Rule 3.1.7 of the stone regulations, for Classes A and B the factor is 1.5, while for Class C it is reduced by 25%; therefore the distance should be: 45*1.5*（1-0.25）=50.625m. However, according to building codes, 11.2.1: For Class A factories and warehouses, piles of combustible materials, storage tanks for Class A and B liquids, liquefied petroleum gas tanks, as well as tanks for combustible and oxidizing gases, the minimum horizontal distance from these elements to overhead power lines should be 1.5 times the height of the pole (tower). For storage tanks for Class C liquids, the minimum horizontal distance from such tanks to overhead power lines should be 1.2 times the height of the pole (tower). The minimum horizontal distance between overhead power lines of 35 kV or higher and liquefied petroleum gas storage tanks (areas) with a single tank capacity of more than 200 m3 or a total capacity of more than 1000 m3 should be 40.0 m. When the tanks are buried underground, this minimum horizontal distance can be reduced by 50%. There is no distance from Class C devices. I would like to ask everyone: if we follow the building codes (rather than the stone-related regulations), what distance should be maintained between Class C warehouses or production facilities and high-voltage power lines? Thank you!
According to building codes, there are indeed no requirements regarding the distance between Class C warehouses, workshops, and overhead power lines; as long as they can be kept away from the regulations set by the Stone Regulations, it’s sufficient to follow the building codes. The key is to get approval from the local fire department and safety authorities (the distance requirements outlined in the Stone Regulations are quite strict)
Thank you, Floor 2. But what if we follow the building codes, and there are no specific provisions in those codes? What should be the appropriate spacing?
The building codes don’t specify it, but the power industry does; I can’t remember the exact distance requirements
According to the \"Code for Urban Power Planning\" GB 50293-1999, the vertical distance between 35kV overhead lines and buildings should be 4 meters, while the horizontal distance should be 3.5 meters
I suggest the original poster consult the power authorities and safety supervision departments for their opinions. I have encountered the same problem. Since there are no regulations in the building codes, and if the safety inspection authorities are not strict and do not require compliance with stone-related regulations, then the distance between Class C factories, warehouses, and power lines can be determined in accordance with the provisions of the \"Detailed Rules for the Implementation of the Regulations on the Protection of Power Facilities\" (Order No. 8 issued by the Economic and Trade Commission and the Ministry of Public Security). The exact distance still needs to be determined through consultation with the power authorities. The problem I encountered at the time; when I consulted the electricity department, they told me it should be no less than 5m.
Determine whether the factory (warehouse) you plan to build is in an explosive or fire-hazardous environment. Article 1.0.5 of GB50016-2006, the Code for Fire Protection Design of Buildings, stipulates that in addition to complying with the provisions of this code, the fire protection design of buildings shall also comply with the provisions of **relevant current standards. According to GB50257-96 \"Code for Installation of Electrical Equipment – Construction and Acceptance Specifications for Electrical Equipment in Explosive and Fire-Hazardous Environments\": 3 Electrical circuits in explosive hazard environments 3.1.7 Overhead lines of 10 kV and below are strictly prohibited from crossing areas with explosive gases ； The horizontal distance between overhead lines and explosive gas environments should not be less than 1.5 times the height of the poles. In special cases where the horizontal distance is too small to avoid collision, effective protective measures must be taken. 4 Electrical installations in fire-hazardous areas 4.2.9 For overhead lines of 10 kV and below, it is strictly prohibited to pass over fire-hazardous areas ； The horizontal distance between overhead lines and areas with fire hazards should not be less than 1.5 times the height of the poles.
Since it’s not specified in the building codes, you must use the values outlined in the petrochemical regulations.
If it is a chemical enterprise, then chemical industry regulations must be followed; if it is not a chemical enterprise, construction industry regulations can be applied. For matters not covered by those regulations, it is recommended to refer to the relevant provisions for the power sector
According to the provisions of GB50160－2008, the distance between Class C buildings in the petrochemical industry and high-voltage lines should be no less than 1.125 times the height of the pole
Do anyone else have any comments? I checked the regulations regarding city electricity supply: for 220,000-volt cables, the vertical distance between buildings should be more than 6 meters, and the horizontal distance should be more than 5 meters.
If you are sure that your equipment and warehouse do not involve Class C liquids, then follow the requirements of the electrical design codes – that’s correct.
I seem to have heard as well that it’s 1.125 times the pole height, but I don’t know which specification exactly.
I’ll whisper to the original poster: Are you considering the approval process at this planning stage? Follow the building codes and fire safety regulations. Otherwise it will look ugly! ~! :lol
First, what kind of company are you? If it is a petrochemical enterprise, follow petrochemical regulations; otherwise, follow construction regulations
Question: What should be the minimum fire separation distance between two Class C, Division 2 factory buildings?