Safety and hygiene management and indicator compliance in dusting rooms: norms, practices and challenges

introduction

With the widespread application of powder spraying technology, the safety and health issues of powder spraying rooms have attracted much attention. Not just to protect workers' health, but also to guard against potential explosion risks. This article will conduct an in-depth analysis of various indicators of safety and hygiene in powder spraying rooms in accordance with relevant regulations, and discuss how to ensure the compliance of these indicators in practice.

As an indispensable part of the coating industry, the powder spraying room's compliance with safety and health indicators is crucial. According to relevant regulations, there are clear requirements for suspended powder concentration in the powder spraying room, use of electrostatic Spray Guns, total dust concentration, and wind speed at the opening surface. This article will provide an in-depth look at the rationale behind these regulations, explain how they apply in practice, identify the challenges that may be faced, and provide some recommendations to ensure a good level of safety and hygiene in powder spray booths.

Control of suspended powder concentration in powder spraying room

Minimum explosive concentration value requirements

According to regulations, the average concentration of suspended powder in the powder spraying room should be less than half of the minimum explosive concentration of the powder. The reason behind this regulation is to prevent the risk of explosion. The powder spraying room is a place for powder coating. Excessive powder concentration may cause an explosion and pose a serious threat to workers and equipment.

In actual operation, the concentration of suspended powder in the powder spraying chamber needs to be adjusted according to the lowest explosive concentration value of the specific powder. For powders with unknown minimum explosive concentration (MEC), it is stipulated that the maximum concentration shall not exceed 15g/m³. This measure was formulated with safety factors in mind to ensure that even powders with unknown explosive concentrations have clear concentration limits, thus ensuring the overall safety of the powder spraying room.

Use of explosion suppression equipment

For powder spraying rooms equipped with explosion suppression equipment, it is stipulated that the concentration of suspended powder in the exhaust duct at the outlet of the powder spraying room is allowed to exceed 50% of the minimum explosion concentration. This is based on the performance and principle of explosion suppression equipment. Explosion suppression equipment can effectively slow down the propagation speed of sparks, thereby improving the safety of powder handling in the powder spraying room. However, when using explosion suppression equipment, care must still be taken to ensure that it is functioning properly to avoid a false sense of security.

Use of electrostatic Spray Gun

The electrostatic powder Spray Gun is one of the important equipment in the powder spray room. According to regulations, its use should comply with the requirements of GB 14773. This regulation focuses on the design and manufacturing standards of electrostatic powder Spray Guns and their auxiliary devices to ensure that they do not create additional safety risks during their work.

Total dust concentration control

The allowable concentration of total dust in the workplace air is 8mg/m³. This regulation focuses on the control of total dust in the powder spray booth to maintain indoor air quality. In actual operation, this standard can be achieved by properly setting up ventilation systems and regularly cleaning equipment and work areas. Keeping the site clean not only contributes to the health of workers, but also to the normal operation of equipment.

Control of wind speed at opening surface

The suitable range of wind speed at the opening surface of the powder spraying room is 0.3-0.6m/s. This regulation aims to quickly remove suspended powder through appropriate wind speed, reduce the time that dust stays indoors, and reduce the risk of explosion. In actual operation, the wind speed at the opening surface needs to be adjusted according to the specific conditions and process requirements of the powder spraying room to ensure that it is within a safe range.

in conclusion

The compliance of the safety and health indicators in the powder spray room is directly related to the safety of the workplace and the health of workers. In actual operation, it is necessary to fully understand the principles behind the relevant regulations and take practical measures to ensure compliance with various indicators. At the same time, different powder and process requirements may require customized safety management solutions, so regular safety training and equipment inspections are also particularly important in powder spray room operations. Through scientific management and practice, we can better ensure the safety and hygiene of the powder spraying room and provide strong support for the sustainable development of the coating industry.