High temperature operation refers to how many degrees Celsius the wbgt index is greater than?

In the field of occupational health, high-temperature operation refers to the operation in which the average wet bulb temperature index (WBGT) in the workplace is ≥ 25℃ in the process of production and labor.

1, definition of high temperature operation

High temperature operation refers to the operation under abnormal operating conditions with high temperature, strong thermal radiation, high air humidity (relative humidity ≥80%RH) and wet bulb temperature index (WBGT index) exceeding the specified limit. Including high temperature weather operations and high temperature operations in the workplace.

High temperature weather refers to the weather where the daily maximum temperature is above 35℃ released to the public by the meteorological offices and stations affiliated to the competent meteorological departments at or above the prefecture level. Hot weather operation refers to the operation that the employer arranges workers to carry out in a high-temperature natural meteorological environment in hot weather. High temperature operation in the workplace refers to the operation in which the average WBGT index in the workplace is ≥25℃ in the process of production and labor.

2, high temperature working environment

The environment of high temperature operation includes metallurgical industry, including steelmaking, ironmaking, steel rolling, coking and so on. Casting, forging and heat treatment in machinery manufacturing industry; Kiln workers, furnace workers, etc. In the glass and refractory industries.

In addition, there are paper-making, sugar-making, brick and tile industries, power plants, boiler rooms and diving cabins for trains and ships. , all belong to high temperature operation. The high temperature working environment is very bad. In order to avoid heatstroke every summer, water curtain air conditioning is used to locally cool the high temperature workshop.

Protective measures for high temperature operation

1. Improve working conditions and equip with protective facilities and equipment.

① Water insulation: Commonly used methods include water tank or circulating water furnace door, waterfall water curtain, etc.

② Use of thermal insulation materials: Commonly used materials include asbestos, slag, grass ash, foam brick, etc. In factories and small and medium-sized enterprises that lack water sources

Industry, this method is the best.

(3) Adopt natural ventilation: such as skylight and open workshop, or install hood on the roof.

④ Mechanical ventilation: such as fan and post air supply. Install air conditioning equipment.

2. Strengthen personal protection

Personal protective equipment: Work clothes should be made of strong, heat-resistant and breathable fabrics, and work caps, protective glasses and masks should be provided according to the needs of different operations. Such as blast furnace operation, you must wear heat shield and heat-proof clothing with good heat insulation and ventilation.

3. Strengthen medical care and health monitoring.

From the point of view of prevention, it is very necessary to do a good job of physical examination for high temperature workers before employment and in summer. Those who have high temperature contraindications such as cardiovascular diseases, central nervous system diseases and digestive system diseases are generally not suitable for high temperature operation.

4. Dietary essentials

Workers exposed to high temperature should supplement water, salt, water solubility and vitamins in their diet and nutrition.