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1. The safe distance between oxygen and acetylene cylinders is 5 meters, and the safe distance between oxygen/acetylene cylinders and sources of fire is 10 meters. 2. The specified safety distances when the equipment is not powered off are as follows: 0.7 m for 10 kV and below, 1.0 m for 35 kV, 1.5 m for 110 kV, 3.0 m for 220 kV, and 5.0 m for 500 kV. The specified value for this safety distance refers to the condition where the equipment guards are removed, taking into account the normal range of movement of workers during their tasks. 3. The safety distance from road construction blasting debris must not be less than the minimum 200m specified in the safety regulations. 4. The distance between high-pressure gas pipelines and the foundations of buildings should be at least 4 meters (for a medium pressure of 0.4 to 0.8 Mpa) and at least 6 meters (for a medium pressure of 0.8 to 1.6 Mpa) ； The distance from street trees should be no less than 1.2 meters ； At least 5 meters away from railway rails ； At least 2 meters away from the tram tracks ； There is no specified distance from other roads. 5. Work at height is considered to be the case only when it is above 2 meters without any fall prevention measures. 6. The safe distance between a crane and overhead power lines is 6 meters in both the horizontal and vertical directions at a voltage of 220 KV. At voltages of 60–110 KV, it is 4 meters in the horizontal direction and 5 meters in the vertical direction. 7. In the cylinder room of the oxygen production station, empty cylinders and filled cylinders should be stored separately, with a distance of more than 1.5 meters between them, and signs should be in place. 1.5 meters mentioned by the poster is also a safe distance, right? 8. Safety protection zones for railway lines should be established on both sides of the railway tracks. The extent of the safety protection zone around railway lines starts from the foot of the embankment or the top of the cut, or from the outside of railway bridges, with the following distances: (1) In urban areas, it shall be no less than 8 meters ； (II) Residential areas in urban suburbs: not less than 10 meters ； (III) Residential areas in villages and towns: not less than 12 meters ； (IV) In other areas, not less than 15 meters. 9. The fire safety passage should be 3.5m wide; in cases of a dead-end passage, a parking area must be provided at the end. 10. The height of Guanqiao on the fire road is 5 meters. 11. The safety distance between highways and oil depots is 40 meters. 12. The working area at heights must maintain a specified safe distance from overhead power lines: at least 1 meter from ordinary power lines and at least 2.5 meters from ordinary high-voltage lines. It is also necessary to prevent the conductive materials being transported from coming into contact with these lines. If the height is less than 2 meters, but the area where work is carried out is on a slope with a gradient of more than 45°, if there are pits, wells, rotating equipment, or items that could cause injury in the vicinity, if the working conditions are special (such as in snowy or windy weather), or if there is mechanical vibration, work must be carried out in accordance with the regulations for working at heights, even when working inside rooms where toxic gases are present. High-altitude work that falls under the following categories is considered special high-altitude work: work at heights of 30 meters or more above the working reference level (including 30 meters), work in environments with high or low temperatures, during rainy or snowy weather, at night, near or in contact with live electrical conductors, in situations where there is no solid surface to stand on or a unreliable one, during emergency rescue operations in confined spaces, and work in areas where the concentration of toxic or harmful gases and dust exceeds allowable levels. 13. The distance between bottles should be 8 meters, with a minimum of 5 meters. 14. Safe distance between oil depots and industrial enterprises: The safe distances for oil depots of grades 1, 2, 3, 4, and 5 are 60, 80, 40, 35, and 30 meters respectively. 15. The no-fire zone at the construction site must be at least 15 meters away from the living areas, and at least 25 meters away from other areas. 16. Based on the performance, structure, and operational requirements of various electrical equipment (facilities), safety distances can be roughly divided into the following four categories: (1) Safety distances for various circuits. (II) Safe spacing for power transformation and distribution equipment. (III) Safe spacing between various electrical equipment. (IV) Safety distance during inspection and maintenance. 500kV: 5m ； 220kV: 3m ； 110kV: 1.5m ； 35kV: 1m ； 10kV: 0.7m. 17. The minimum horizontal safety distance between 10 kV high-voltage lines and buildings is 1.2 meters, while the vertical distance is 2.5 meters. To ensure the safety of residents, the power supply authorities have increased the height of utility poles from 10 meters to 12 or 15 meters. 18. What is the safe distance from a person’s grounding point when a ground fault occurs in high-voltage equipment? The interior area should be more than 4 m, and the exterior area should be more than 8 m. 19. For indoor lighting in normally dry areas, the vertical distance should be no less than 1.8 meters; otherwise, a safe voltage should be used. 20. For this railway line, both parties must establish safety measures for it. The scope of safety protection for this railway line, measured outward from the edge of the railway track and from the railways bridges located at the top or sides of slopes, is as follows: (1) in urban areas, not less than 8 meters; (2) in residential areas on the outskirts of cities, not less than 10 meters; (3) in villages and small town settlements, not less than 12 meters; (4) in other areas, not less than 15 meters. 21. When installing temporary wiring, the installation height must be no less than 2.5 meters indoors and no less than 3.5 meters outdoors. 22. When oil pipelines inevitably intersect with other pipelines, the safety distance must be no less than 0.4 meters. 23. Heights: (I) Definition of work at heights: Work performed at a height of 2 meters or more above the reference surface for falling ； (II) Safety nets should be installed on scaffolds that are 6 meters or taller. 24. A protective cage ladder must be added if the lower end of a steel straight ladder is more than 2.4 meters above the reference level. 25. Power Construction Safety Regulations: 3.2 For road construction, two-lane roads should be at least 6m wide ； Single lane: not less than 3.5m ； The clearance under the pier and overhead lines should be at least 5 m, and storage areas for materials and waste must be at a distance of more than 0.5 m from drainage ditches. 26. Technical specifications for scaffold erection: For linear and open-type scaffolds, wall connectors must be installed at both ends. The vertical spacing between these wall connectors should not exceed the floor height of the building, nor should it be more than 4 meters. Rigid wall connectors are recommended for single-row and double-row scaffolds with a certain height. 27. Transport roads should have as few curves and intersections as possible. The bending radius of trucks should generally be no less than 15 m; in special cases, it should not be less than 10 m, with good visibility conditions. 28. When on-site roads need to cross ditches, a temporary bridge with sturdy structures and reliable railings on both sides should be constructed, and it can be put into use only after passing inspection. The width of pedestrian footbridges shall not be less than 1 m, the width of trolley footbridges shall not be less than 1.5 m, and footbridges for wagons and cars must be designed with a width of not less than 3.5 m. The bridge should have reliable railings on both sides. 29. Jian’an Regulations: 3.2 Roads; 3.2.7 Mobile vehicles on site should drive at a limited speed, with the general limit being no more than 15 km/h. 30. Power Construction Safety Regulations: 3.3 Storing and Keeping Materials and Equipment (1) Equipment shall not be stacked against the walls of buildings; there should be a distance of at least 0.5 meters, and both ends should be enclosed. (II) In warehouses with vehicles coming in and going out, the width of the main passages must be no less than 2.5 m, while the passages between different materials must be no less than 1.5 m. 31. Working hours in gas-filled areas – Safe working time in such areas: Work can be carried out for extended periods as long as the CO concentration does not exceed 30 mg/m3 (24 PPm). When the CO content does not exceed 50 mg/m3 (40 PPm), the continuous operating time shall not exceed 1 hour. When the CO content does not exceed 100 mg/m3 (80 PPm), the continuous operating time shall not exceed 0.5 hours. When the CO content does not exceed 200 mg/m3 (160 PPm), the continuous operating time shall not exceed 15–20 minutes. The interval between each time staff enter the gas leak area to work should be at least 2 hours. 32. Normal activity range of the human body (workers) and safe distance from live equipment: 0.35 meters for 10 kV and below ； 20~35kV 0.6 meters ； 44kV 0.9 meters ； 60~110kV 1.5 meters ； 220kV 3 meters ； 330kV 4 meters ； 500kV 5 meters. 33. The safety distance between a grade-2 gas station and ordinary civil buildings is 12 meters, while it is 10 meters for grade-3 gas stations. The distance between a gas station and important public buildings must be 50 meters; such important public buildings include office buildings of Party and government agencies at the prefecture level or above ； Public gathering places such as gyms, halls, conference centers, cinemas, theaters, indoor entertainment venues, stations, and passenger terminals ； Communication and command and control buildings such as postal offices and telecommunications facilities at the provincial level or above ； Office buildings of financial institutions at the provincial level and above ； Buildings such as primary and secondary schools, kindergartens, and hospitals. Ordinary commercial premises, office buildings, mixed-use buildings, and high-rise residential buildings are classified as a category of protected structures that come right after important public buildings. The safety distance from it to a grade II gas station should be 20 meters, and the safety distance from it to a grade III gas station should be 16 meters. 34. Large and medium-sized hazardous chemicals warehouses should have a storage area and a living area; there should be a solid wall at least 2 meters high separating the two areas. The distance between this wall and the buildings within the storage area should be no less than 5 meters, and the fire separation requirements between the buildings on either side of the wall must also be met. 35. Stores dealing in the retail of hazardous chemicals should be located at a distance of more than 500 meters from densely populated residential areas. 35. Large and medium-sized hazardous chemical warehouses should maintain a distance of at least 1,000 meters from surrounding public buildings, main traffic routes, and industrial and mining enterprises. 36. In evacuation passages, “Emergency Exit” signs should be installed on the walls on both sides of the passage as well as at corners; the upper edge of the signs shall not be more than 1 m above the ground level. The sign can also be placed directly on the ground, covered with a non-flammable, transparent, and sturdy protective panel. The distance between signs should not exceed 20 m, and the distance from the end of the bag-shaped walkway to a sign should not be more than 10 m. 37. Fire extinguishers should be placed firmly, with their labels facing outward. Portable fire extinguishers should be placed in fire extinguisher cabinets or on hooks or brackets, with their top being no higher than 1.50 meters above the ground level ； The height of the bottom from the ground should not be less than 0.08 m. Fire extinguisher cabinets must not be locked. 38. The protective cover should preferably have a closed structure; when a mesh structure is necessary on-site, its safety distance and the opening width of the mesh must meet the following requirements: (1) To prevent injuries caused by accidental passage of fingertips, the opening width – whether it is the diameter or side length, or the short axis dimension of an oval-shaped opening – should be less than 6.5 mm, and the safety distance should be no less than 35 mm. (II) To prevent injury caused by accidental passage of fingers, the opening width: the diameter and side length, or the short axis dimension of an oval opening, should be less than 12.5 mm, and the safety distance should be no less than 92 mm. (III) To prevent injury caused by the accidental passage of the palm (excluding the first metacarpophalangeal joint), the opening width: the diameter and side length, or the short axis dimension of an oval opening, should be less than 20 mm, and the safety distance should be no less than 135 mm. (IV) To prevent injury caused by accidental passage of the upper limbs, the opening width: the diameter and side length, or the short axis dimension of an oval aperture, should be less than 47 mm, and the safety distance should be no less than 460 mm. (5) To prevent injuries caused by accidental passage of the toes, the gap between the bottom of the guard and the ground (or standing surface) should be less than 76 mm, and the safety distance should be no less than 150 mm. 39. During normal oil and gas well operations, the blowout preventer line is installed downwind of the local monsoons, at a distance of 25 meters from the wellhead; its diameter must be at least 62 mm. The blowout valve is placed at a distance of 3 meters from the wellhead, while the pressure gauge is connected between the internal control line and the blowout valve. When performing major repairs by sidetracking oil and gas wells, the outlet of the blowout preventer line should be connected to a safe location at least 75 meters above the wellhead, and at least 50 meters away from various facilities. 40. Temporary lines crossing roads must be at a height of more than 4 meters. 41. During the open-pit quarrying phase, when using shallow-hole blasting, the layer height shall not exceed 6 meters; whereas when using medium-to-deep hole blasting, the layer height shall not exceed 20 meters. 42. Safety distances in warehouses: (1) There should be a fire separation distance of at least 20 meters between warehouses storing Class A hazardous chemicals; this distance can be reduced to 12 meters when the amount stored in a warehouse is smaller ； (II) The distance between Class A hazardous chemical warehouses and important public buildings shall be at least 30 m, and the fire protection distance from other civil buildings shall be at least 25 m. (III) The distance between the wall surrounding a Class A hazardous chemicals warehouse and the buildings within that area must be at least 25 meters. (IV) The distance between large warehouses and adjacent residential areas and public buildings should be no less than 150 m; the distance from adjacent industrial and mining enterprises as well as main railway lines should be no less than 100 m; and the distance from roads should be no less than 50 m. (5) Large warehouses are generally divided into different zones; their administrative and living areas should be located outside the warehouse area, and separated from it by a wall at least 2 meters high. 43. Safety protection zones for railway lines should be established on both sides of the railway tracks. The extent of the safety protection zone around railway lines starts from the foot of the embankment or the top of the cut, or from the outside of railway bridges, with the following distances: (1) In urban areas, it shall be no less than 8 meters ； (II) Residential areas in urban suburbs: not less than 10 meters ； (III) Residential areas in villages and towns: not less than 12 meters ； (IV) In other areas, not less than 15 meters. 44. Open flames are prohibited within 40 meters of industrial enterprises carrying out gas-related operations. 45. Safety exits should be arranged separately from the safety exits or evacuation exits within a building; the horizontal distance between the nearest edges of two adjacent safety exits or evacuation exits shall not be less than 5.0 m. 46. (I) Requirements for the installation of evacuation stairs in shops within multi-story buildings. (1) Indoor evacuation stairs in shops with more than 5 floors shall be enclosed stairways (including enlarged enclosed stairwells on the first floor). (2) In underground shops, when there is one or two underground floors and the height difference between the indoor floor level and the outdoor entrance level is greater than 10 m, smoke-proof stairwells shall be installed ； Other underground shops may be equipped with enclosed stairwells, and the doors of such stairwells should be fire-resistant doors of Class B. (3) The width of the evacuation staircase shall not be less than 1.1 m. (II) Requirements for the installation of evacuation stairs in shops within high-rise buildings: (1) Class A buildings and Class B buildings with a height exceeding 32 m shall be equipped with smoke-proof stairwells. (2) Class II buildings with a building height not exceeding 32 m shall be equipped with enclosed stairwells. (3) The width of the evacuation staircase shall not be less than 1.2 m. 47. In petrochemical enterprises, the width of fire road surfaces should not be less than 6m. (1) The turning radius at the inner edge of the road surface should not be less than 12m; (2) The clear height above the road surface should not be less than 5m. (III) The distance from the center of any storage tank to the two fire truck access roads in different directions shall not exceed 120 m ； (IV) When there is a fire lane on only one side, the distance from the lane to the center of any storage tank shall not exceed 80 m ； (5) If a fire lane is provided on one side, the distance from the lane to the farthest railway track shall not exceed 80 m ； (VI) If fire lanes are provided on both sides, the distance between these lanes should not exceed 200 m; if it exceeds 200 m, additional fire lanes must be installed in between ； (7) When the railway loading and unloading lines for liquefied hydrocarbons, flammable liquids, or solids of Classes A and B are dead-end lines, the distance from the car stop to the last car position shall not be less than 20 m ； (8) In the railway loading and unloading areas for Class A, B, and C liquids, the distance between the boom pipes of two adjacent stacks shall not be less than 10 m ； However, the distance between the boom pipes of two adjacent loading/unloading stacks for Class C liquids shall not be less than 7 m. 48. Items stored in the warehouse should be kept 20 cm away from the walls. 49. Rules for Fire Safety Management in Warehouses (Order No. 6 of the Ministry of Public Security): Inventory items should be stored in categories and in stacks; each stack should cover an area of no more than 100 square meters. The distance between stacks should be at least 1 meter, the distance between stacks and walls should be at least 0.5 meters, and the distance between stacks and beams or columns should be at least 0.3 meters. The width of main passages should be at least 2 meters. 50. The three types of safety distances in safety regulations. The first type of safety distance is the distance required when the equipment is not powered off; the specified values are as follows: 0.7 m for 10 kV and below, 1.0 m for 35 kV, 1.5 m for 110 kV, 3.0 m for 220 kV, and 5.0 m for 500 kV. The second type of safety distance is the distance that must be maintained between workers and live electrical equipment within the range of their normal activities during work. It takes into account the farthest positions that workers might move to during normal operations, and determines the necessary safety distance from the live equipment. The specified values are as follows: 10 kV and below – 0.4 m, 35 kV – 0.6 m, 110 kV – 1.5 m, 220 kV – 3.0 m, 500 kV – 5.0 m. Third type of safety distance: the safety distance between a person and a live conductor during work at ground potential. The specified values are as follows: 10 kV and below – 0.4 m, 35 kV – 0.6 m, 110 kV – 1.0 m, 220 kV – 1.8 m (1.6 m), 500 kV – 3.6 m. 51. Classification of work at heights: Level 1: Working height of 2–5 meters; Level 2: Working height of 5–15 meters; Level 3: Working height of 15–30 meters; Special level: Working height of over 30 meters.