1. Proposed for the first time
Number of people involved in dust operations
Number of dust workers involved: the maximum number of workers in the same dust site.
On July 20, 2015, Annex 1 of the Notice of the Office of the State Council Safety Commission Office on Carrying out Special Supervision of the Prevention of Dust Explosion in Dust Operations and Use Sites (Safety Committee Ban Mingdian [2015] No. 16) gave the definition of "the number of people involved in dust operations".
2. Revision process
First revision of the definition
Number of people involved in dust operations
Number of workers involved in dust: refers to the maximum number of workers who may be injured by dust explosions. The main areas include: production workshops where there is a risk of dust explosion, and work areas where the dust removal pipes pass through structures adjacent to the explosion hazard site and no isolation facilities are provided.
On May 6, 2016, the definition of "the number of people involved in dust operations" was given in Annex 2 of the Circular of the General Office of the State Administration of Safety Supervision on the "4.29" Dust Explosion Accident of Jingyixing Hardware Processing Factory in Shenzhen, Guangdong Province (Guan Si [2016] No. 39 of the General Office of Work Safety).
Second revision of the definition
The number of dust-related workers ← the number of dust-related workers
Number of dust-related workers: refers to the maximum number of workers who may be injured by dust explosions. The main areas include: production workshops with dust explosion hazards, structures through which dust removal pipes pass, and work areas adjacent to explosion hazard sites without isolation facilities.
On March 16, 2017, Annex 1 of the Circular of the General Office of the State Administration of Safety Supervision on the Special Rectification Work of Dust Explosion Prevention in the Industry and Trade Industry in 2016 (Guan Si Han [2017] No. 43 of the General Office of Work Safety Supervision) gave "the number of dust-related operations.
Third revision of the definition
Number of dust-related workers: the maximum number of dust-related workers in a single shift.
Key points of definition:
Single shift. Only one shift personnel is counted, and shift personnel are not accumulated.
The maximum number of people involved in powder work.
●Maximum: Refers to the area that is likely to receive the most damage from a dust explosion. The main areas include production halls with dust explosion hazards, structures through which dust removal pipes pass, and work areas adjacent to explosion hazard sites without isolation facilities.
The number of stations involved in powder operations. It is determined by a relatively fixed number of stations to avoid dynamic changes in the number of personnel attendance rates. Similar to a 5-seater car, a 7-seater car, it is not dynamically adjusted due to the passengers.
3. Calculation formula
Calculation formula
Number of dust-related workers = the maximum number of dust-related stations in a single shift in the dust-related area + the maximum number of stations in a single shift in the work area adjacent to the powder-related area and without isolation facilities + the maximum number of stations in a single shift in the structure through which the dust removal pipeline passes
gist
→ is related to the number of stations; Not correlated with personnel attendance,
→ related to the setting of the powder-related area;
→ is related to the dust collector setting and the area through which the dust collection pipe passes;
If → has more than one area, all areas should be added up.
Fourth, self-examination and accounting steps
Identification of powder-related areas
→ identification of the enterprise's powder-related process and powder-related equipment.
→ identification of powder-related areas.
→ identify the work area adjacent to the powder-related area and without isolation facilities.
Identification of the connection area of the dust collection system
→ look at the areas where the dust collection system is directly connected
→ look at the area through which the dust collection duct passes.
The largest powder-related operation station in a single shift
→ single shift
→ the maximum number of dust-related stations in the powder-related area
→ maximum number of workstations in a work area adjacent to the powder area and without a quarantine facility.
→ the maximum number of stations in the structure through which the dust extraction duct passes.
01
Confirm the number of people involved in powder operations
→ counted as a single shift.
→ the maximum number of dust-related workers in a single shift.
Application example 1
How many people are involved in powder operations in a metal grinding enterprise?
A metal grinding enterprise has a total of 50 employees and 10 management personnel. The main powder process of the enterprise is the sandblasting process. The sandblasting section of the job site is set up independently, and the dust collector pipe is directly connected from the sandblasting room to the outdoor dust collector. The company adopts the form of "three shifts" to carry out production, and there are 3 sandblasting machine stations and 3 spare parts preparation stations in the sandblasting area.
Calculation points:
→ single shift. Only one shift is counted.
→ the maximum number of workers involved in flour-related operations.
3 sandblasting stations, counted.
3 spare parts stations, which need to be included because they are set up in the powder-related area.
The sandblasting area is set independently, and is not directly connected with other areas
Other regions are not counted.
Outside the dust collector setting, the dust removal pipe does not pass through other areas
There is no need to count people in other work areas.
Number of powder-related operations: 3+3=6 people
Application example 2
1. The maximum number of stations in a single shift in the powder-related area is 9, and the current number of workers is 6
2. The maximum number of workstations in a single shift in the work area adjacent to the powder-related area and without isolation facilities is 19, and the current number of workers is 16
The number of powder-related workers = 9 + 19 = 28 people
Application example 3
1. The maximum number of stations in a single shift in the powder-related area is 9, and the current number of workers is 6
2. The maximum number of workstations in a single shift in the work area adjacent to the powder-related area and without isolation facilities is 27, and the current number of workers is 24
The number of powder-related workers = 9 + 27 = 36 people
Application example 4
1. The maximum number of stations in a single shift in the powder-related area is 9, and the current number of workers is 6
2. The maximum number of stations in a single shift in the work area adjacent to the powder-related area and without isolation facilities is 19 people, and the current number of workers is 16 people3. The maximum number of stations in a single shift in the work area adjacent to the powder-related area and with isolation facilities is 6 people, and the current number of workers is 6 people4. The dust removal pipeline passes through workshop A and workshop B, and the number of stations in the two workshops needs to be included
The number of powder-related workers = 9 + 19 + 6 = 34 people