30 kinds of safe distance for work, especially recommended!

In daily operations such as construction and overhaul, equipment facilities, people and surrounding environment, materials, etc., need to set a relative safety distance, which is sometimes the distance between life and death. In the course of normal work, these safety distances, don't underestimate!

â–² The boundary between life and death

1. The safety distance of oxygen acetylene bottle is 5m, and the safety distance between oxygen acetylene and fire source is 10m.

2. The safety distance when the equipment is not powered off, its specified values ​​are as follows:

• 10kV and below one 0.7m

• 35kV - 1.0m

• l10KV a 1.5m

• 220kV a 3.0m

• 500kV to 5.0m

The safety distance specification refers to the case where the device is removed from the barrier and the normal range of activities of the worker at work is considered.

3. Live working safety distance

Definition of safety distance:

Minimum safety distance: The minimum distance that should be maintained between the ground potential operator and the charged body.

Minimum ground safety distance: The minimum distance that should be maintained between the equipotential operator on the charged body and the surrounding grounding body.

Minimum phase-to-phase safety distance: The minimum distance that should be maintained between the operator on the charged body and the adjacent phase charged body.

Minimum safe working distance: In order to ensure personal safety, taking into account the necessary activities in the work, the minimum distance that the ground potential operator should maintain between the working and the charged body.

The basic principle for determining the minimum safe working distance is to add a reasonable increase in human activity based on the minimum safe distance. In general, the increment can be taken as 0.5m.

The minimum combined gap refers to the sum of the distance that the human body should maintain the grounded body and the charged body when the operator in the combined gap is at the lowest 50-operation surge discharge voltage position.

4. High pressure gas pipeline

• The distance from the foundation of the building is not less than 4 meters (media pressure 0.4 to 0.8Mpa) and not less than 6 meters (media pressure 0.8 to 1.6Mpa);

• The distance from the street tree is not less than 1.2 meters;

• Not less than 5 meters from the railway rail;

• The rail of the tram is not less than 2 meters;

• The distance from other roads is not regulated.

5. The anti-dropping work at height should be higher than 2 meters without fall arrest measures.

6. Safety distance between crane and overhead transmission line

• When the voltage is 220KV, it is 6m in both the horizontal direction and the vertical direction;

• When the voltage is 60-110KV, it is 4m in the horizontal direction and 5m in the vertical direction.

7. The empty bottle and the solid bottle between the cylinders of the oxygen station should be stored separately, with a spacing of more than 1.5 meters and a sign. The 1.5 meter of the landlord is also a safe distance.

8. High work classification

Level 1: Working height 2-5 meters

Level 2: working height 5-15 meters

Level 3: working height 15-30 meters

Special grade: The working height is more than 30 meters.

9. The fire safety passage is 3.5m, and the single passage must be set at the end.

10. Three safety distances in safety regulations

The first safety distance: the safety distance when the equipment is not powered off.

The specified values ​​are as follows: 10 kV and below - 0.7 m, 35 kV - 1.0 m, l10 KV - 1.5 m, 220 kV - 3.0 m, 500 kV - 5.0 m.

The second safety distance: the safe distance between the normal working range of the staff and the live equipment. It takes into account the maximum spatial position that a worker may be active in normal work, and the safe distance that must be maintained for 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.

The third safety distance: the safe distance between the human body and the charged body when the ground potential is energized.

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.

11. Store items in the warehouse 20cm from the wall

12. The working place at the height should be kept at a prescribed safety distance from the overhead wire, more than 1 meter away from the ordinary wire, and 2.5 meters away from the ordinary high-voltage wire, and the conductor material to be transported should be prevented from touching the wire.

The height is less than 2 meters, but the slope below the working section is a slope with a slope greater than 45°. There are pits, wells, rotating equipment or stacking items that are easy to injure, special working conditions (wind and snow weather), mechanical vibration, When working in a room where toxic gases are present, they should be carried out in accordance with the regulations for working in high places.

High-altitude operations that meet the following conditions are special high-altitude operations:

13. The bottle spacing is 8 meters and the minimum is not less than 5 meters.

14. The safety distance between the oil depot and the industrial and mining enterprises: the first, second, third, fourth and fifth grade oil depots are 60, 80, 40, 35 and 30 meters respectively.

15. The fire-fighting operation area of ​​the construction site shall be no less than 15m away from the living area and not less than 25m away from other areas.

16. According to the performance, structure and work requirements of various electrical equipment (facilities), the safety distance can be roughly divided into the following four types:

• Safe spacing of various lines.

• Change the safety spacing of power distribution equipment.

• Safety spacing of various electrical equipment.

• Safety clearance during maintenance and maintenance.

  500kV: 5m 220kV: 3m

  110kV: 1.5m 35kV: 1m 10kV: 0.7m

The 17.10 kV high-voltage line has a minimum horizontal safety distance of 1.2 m from the building and a vertical distance of 2.5 m. In order to protect the safety of the residents, the power supply department raised the pole from the original 10 meters to 12 meters or 15 meters.

18. What is the safety distance of the human body grounding point when a high-voltage equipment has a ground fault? The indoor should be greater than 4m and the outdoor should be greater than 8m.

19. Warehouse fire safety management rules (Order No. 6 of the Ministry of Public Security) inventory items should be classified and stored separately. The area of ​​each raft should not be more than one hundred square meters, the distance between 垛 and 垛 should not be less than 1 meter, and the distance between 垛 and wall should be no less than zero. 5 meters, the distance between the raft and the beam and column is not less than 0.3m, and the width of the main channel is not less than 2m.

20. Open fires are prohibited within 40 meters of industrial enterprises with gas operations.

twenty one.

• At least 20m of fire separation distance between Class A hazardous chemicals warehouses can be reduced to 12m when the warehouse storage is small.

• The distance between the Class A hazardous chemicals warehouse and the important public buildings is at least 30m, and the fire distance from other civil buildings is at least 25m.

• The distance between the fence of the Class A hazardous chemicals warehouse area and the buildings in the area shall be at least 25m.

• The distance between a large warehouse and neighboring residential areas and public buildings shall not be less than 150m, and the distance from adjacent industrial and mining enterprises and railway trunk lines shall not be less than 100m, and the distance from the highway shall not be less than 50m.

• Large warehouses are generally partitioned, and their administrative and living areas should be located outside the reservoir area, and separated from the reservoir area by a wall of not less than 2 m.

twenty two. When the oil pipeline and other pipelines are inevitably crossed, the safety distance shall not be less than 0.4 m.

twenty three. Height:

• Height work definition: 2 meters or more from the falling reference plane;

• Scaffolding above three floors (6 m) should be equipped with a safety net.

twenty four. The protective cover should adopt a closed structure as much as possible. When the mesh structure is required at the site, the safety distance and the opening width of the mesh should meet the following requirements:

• In order to prevent injury caused by misuse of the fingertip, the opening width: diameter and side length or the short axis of the elliptical hole should be less than 6.5mm, and the safety distance should be no less than 35mm.

• In order to prevent injury caused by misuse of fingers, the opening width: diameter and side length or the short axis of the elliptical hole should be less than 12.5mm, and the safety distance should be no less than 92mm.

• In order to prevent injury caused by the wrong passage of the palm (excluding the first metacarpophalangeal joint), the opening width: the diameter and the length of the side or the short axis of the elliptical hole should be less than 20 mm, and the safety distance should be not less than 135 mm.

• In order to prevent injury caused by misuse of the upper limb, the opening width: the diameter and the length of the side or the short axis of the elliptical hole should be less than 47mm, and the safety distance should be no less than 460mm.

• In order to prevent injury caused by the tip of the toe, the clearance between the bottom of the shield and the ground (or standing table) should be less than 76mm, and the safety distance should be no less than 150mm.

25. For the scaffolding erection technical specifications, the two ends of the open-type scaffolding of the wall-mounted open-type scaffolding must be provided with wall-connecting parts. The vertical spacing of the connecting wall parts should not be greater than the floor height of the building and should not be greater than 4 m2 steps. Double-row scaffolding should be rigid with a wall.

26. There should be a reservoir area and a living area in the warehouse of large and medium-sized dangerous chemicals. There should be a physical wall with a height of more than 2m between the two areas. The distance between the wall and the building in the reservoir area should not be less than 5m, and should be between the buildings on both sides of the wall. Fire distance requirements.

27. The storefront of the hazardous chemicals retail business should maintain a distance of more than 500m from the densely populated area of ​​the resident population.

28. Large and medium-sized hazardous chemicals warehouses should be at least 1000m away from surrounding public buildings, transportation trunks, and industrial and mining enterprises.

29. In the evacuation channel, the “emergency exit” sign should be placed on the wall on both sides of the channel and on the corner. The upper edge of the sign should be no more than 1m from the ground.

It is also possible to place the sign directly on the ground with a non-combustible transparent and strong protective plate.

The spacing of the signs shall not be greater than 20 m, and the distance from the end of the bag-shaped walkway shall not exceed 10 m.

30. The fire extinguisher should be placed securely and its nameplate should face outward.

The portable fire extinguisher should be placed in the fire extinguisher box or on the hook or bracket. The height of the top from the ground should not exceed 1.50m; the height of the bottom from the ground should not be less than 0.08m.

The fire extinguisher box must not be locked.