From China Factory Accept ODM and OEM Communications Security Equipment Multi functional Flexible Size YH6005

Clothing static protection
1. When the danger level of a gas explosion is in zone 0 or zone 1, and the minimum ignition energy of combustibles is less than 0.25mJ, the worker shall wear work clothes that are free from the danger of static electricity ignition. When the relative humidity of the environment is kept above 50%, wear cotton overalls.
2. Persons working in explosive places should wear anti-static (conductive) shoes to prevent the body from being charged and the ground should be equipped with conductive grounds.
3. It is forbidden to wear clothes, hats or the like in places where there is a risk of explosion.
All accidents that are suspected of being ignited by static electricity shall be analyzed and confirmed in accordance with the following provisions in addition to routine accident investigation and analysis.
1. Check to analyze if there is a necessary condition for ignition due to electrostatic discharge
(1) Through the analysis of the relevant operating equipment, material properties, personnel operation and environmental conditions, it is estimated that there may be static electricity on the equipment, objects and their degree of electrification, discharge conditions and types.
(2) Collect and measure necessary relevant technical parameters and estimate possible discharge energy.
(3) Make a propositional opinion on whether it is an electrostatic discharge source, or make corresponding conclusions on relatively simple and obvious situations.
2. For the more complicated cases, the following part or all of the following contents should be selected for further testing based on actual needs and possibilities. After comprehensive analysis, corresponding conclusions should be made.
(1) Fully collect or measure relevant technical parameters, mainly including environmental temperature, humidity and ventilation, types of combustibles, locations of release sources, possible concentrations and distribution of explosive gases, and existing fire prevention and explosion protection measures and their actual effects. , Flow and flow rate of materials related to static electricity, and conditions of operation and operation of personnel, possibility of other non-electrostatic sources of fire, etc.
(2) Analytical testing of leftover debris, by selecting objects (mainly metal parts) that may be electrostatically charged and discharging, and observing the microscopic appearance through an electron microscope to find out whether there is a similar “crater” feature. High temperature melting micro pits. To determine the specific part of the electrostatic discharge, determine the cause of the accident.
(3) When the degree of electrification of an object and the method of analysis of discharge energy are difficult to determine quantitatively or semi-quantitatively, it is necessary to refer to the specific conditions at the time of the occurrence of the accident to carry out a physical simulation test and verify it. Simulation tests can be conducted on site or at other suitable locations.
Further comprehensive analysis of the relevant situation data to observe whether the interrelationships between the various situation data are in line with the objective law and whether there is any contradiction, and if necessary, additional data collection (including non-electrostatic technology aspects) shall be added for collection or testing so that Make final conclusions.