I. PurposeIn order to standardize the explosion-proof and occupational safety and health requirements of the sand blasting operation place of Hengxin factory, and to prevent accidents from occurring. Second, the scope of application applies to the engineering design, construction, management, production, etc. of the sand blasting operation place of Hengxin factory. Third, the reference standard GBl1651 labor protective equipment selection rules GB / T15605 dust explosion relief guide four, the definition of 4.1 combustible dust under certain conditions can be oxidized with gaseous oxidants or air under the intense oxidation reaction of dust. 4.2 dust explosion hazardous places where there is combustible dust and gaseous oxidants (or air). 4.3 inerting to the dust explosion risk of the place filled with enough inert gas, or will be inert gas, or will be inert gas, or will be inert gas. of inert gas, or inert dust withdrawn on top of the dust layer. Make these dust mixtures non-explosive method. 4.4 explosion suppression explosion, through the physical and chemical effects of extinguishing the flame, so that the unexploded dust is no longer involved in the explosion of explosion control technology. 4.5 relief explosion of dust and gaseous oxidizer or air in the presence of the enclosure of the body of the explosion, before the explosion pressure reaches the limit of the national body of the strength of the package, so that the explosion generated by the high temperature, high pressure products of combustion and unfired through the weak parts of the enclosure on the body. The weak part of the body of the perimeter package to the non-hazardous direction of leakage. Envelope body is not destroyed so that the explosion control technology. 4.6 secondary explosion occurred when the dust explosion, the initial explosion of the shock wave will be deposited dust raised again, the formation of dust clouds, and is followed by the flame ignited by the occurrence of a continuous explosion. Five, the management of the provisions of 5.1 in the sandblasting operation site of the new construction, renovation and expansion projects, must comply with the provisions of this regulation. Those that do not comply with these regulations must formulate safety technology measures plan and meet the deadline. 5.2 The department head must be clear about whether the sand used in this department has explosive danger and take measures that can effectively control sand explosion. 5.3 Hengxin factory combines the characteristics of sand blasting operation place, formulates sand blasting explosion-proof implementation rules and carries out maintenance, and carries out maintenance carefully according to the maintenance confirmation table of the hazardous part. The Safety Office of the Ministry of Human Resources shall carry out supervision and inspection. 5.4 The department shall seriously do a good job in the education of safe production and sandblasting explosion-proof, popularize the knowledge of sandblasting explosion-proof and safety laws and regulations, so that the employees can understand the degree of danger of sandblasting workplaces in the department and the measures of explosion-proof; the company shall carry out the technical and business training for the employees and they shall be permitted to be on duty after they are qualified by the examination. 5.5 Smoke and fire is strictly prohibited in the sandblasting workplaces, and the electrical equipments used must be of the explosion-proof type. 5.6 Explosion-proof products purchased must be licensed by the Ministry of Labor or its designated units and issued with permits.5.7 Facilities for safety, ventilation, explosion-proof and explosion-discharge shall not be dismantled without the approval of the Safety Office of the Human Resources Department.5.8 The safety assessment of the company's construction projects shall include the analysis of the sandblasting explosion hazard and explosion-proof measures, etc. 5.9 When conducting open-flame operations at sandblasting workplaces, the following provisions must be complied with The following provisions shall be observed: 5.9.1 An operating permit approved by the person in charge of safety shall be available; 5.9.2 Before the start of the open flame operation, the combustible dust in the place of the open flame operation shall be thoroughly removed; 5.9.3 During the period of the open flame operation and the subsequent cooling down period, it is strictly prohibited for dust to enter into the place of the open flame operation; 5.9.4 The zone in which the open flame operation is carried out shall be separated or partitioned off from the rest of the equipment; and 5.10 Sandblasting operations must comply with the following regulations: 5.10.1 protective equipment must be worn before work, and no bare arms are allowed to work. No fewer than two people may work. 5.10.2 Air storage tanks, pressure gauges, and safety valves must be calibrated regularly. The air storage tank should discharge dust once in two weeks, and the filter in the sand tank should be checked once a month; 5.10.3 Check whether the ventilation pipe and the door of the sand blaster are sealed. Five minutes before work, the ventilation and dust removal equipment shall be turned on, and when the ventilation and dust removal equipment fails, the sand blasting machine shall be prohibited to work; 5.10.4 The compressed air valve shall be opened slowly, and the air pressure shall not be allowed to exceed 0.8MPa; 5.10.5 The granularity of the sand blasting shall be compatible with the work requirements, and is generally applicable between ten and twenty, and the sand shall be kept dry; 5.10.6 When the sand blasting machine is working, it shall be prohibited for unrelated personnel to be close to it. When cleaning and adjusting the running parts, the machine should be shut down; 5.10.7 It is not allowed to use compressed air to blow dust on the body or to make jokes; 5.10.8 After the work is finished, the ventilation and dust removal equipment should continue to run for five minutes and then be shut down in order to discharge the indoor dust and keep the site clean; 5.10.9 In the event of a personal or equipment accident, the scene should be maintained and reported to the relevant departments; 5.10.10 It is prohibited to The act of eating and drinking is prohibited in the sand blasting operation site. 5.11 Sand blasting operation sites, equipment and devices shall comply with the following regulations: 5.11.1 The bearings of sand blasting equipment shall be dust-proofed and sealed; if there is a possibility of overheating, detectors capable of continuous monitoring of the bearing temperatures shall be installed. 5.11.2 The use of belt drives is not suitable; if belt drives are used, speed difference sensors and automatic anti-slip protection devices shall be installed; when sliding friction occurs, the 5.12 Preventing electric arc and spark ignition 5.13 For sand blasting operation sites, appropriate lightning protection measures shall be taken. 5.14 When there is a danger of static ignition, the following provisions shall be observed: 5.14.1 All metal equipment, device shells, metal pipes, brackets, components, parts, etc. shall generally be electrostatically directly grounded; where inconvenience or workmanship does not allow direct grounding, they may be grounded by means of electrostatically conductive materials or by means of electrostatically conductive materials. Can be indirectly grounded through the conductive materials or products. Static direct grounding resistance is not greater than 100Ω, indirect grounding resistance is not greater than 107Ω.5.14.2 Apparatus directly used for powder, powder conveying pipeline (belt), etc., should be made of metal or antistatic materials.5.14.3 All metal piping connections (such as flanges), must be spanning.5.14.4 Operators should be taken to prevent static electricity.5.14.5 Prohibit The use of directly grounded metal conductors or screens and high-speed flow of sand contact method to eliminate static electricity.5.15 Prevent friction collision spark ignition 5.15.1 fine sand can be accidental collision (such as metal debris and process equipment between the internal parts of the collision) generated by the spark ignition, must take measures to prevent the collision from occurring.5.16 and the dust cloud of direct contact with the equipment or devices (eg, light sources, heaters, etc.) , the allowable temperature of its surface must be lower than the minimum ignition temperature of the corresponding dust layer. VI. Safety Measures 6.1 Strictly controlling the concentration of sandblasting is outside the range of dust explosion concentration, which is an effective measure for explosion prevention. Sand blasting must control the dust concentration is higher than the upper limit of dust explosion concentration.6.4 Reduce the damage caused by the initial explosion 6.4.1 Segmentation and isolation 6.4.1.1 The connection of process equipment must ensure that the equipment can be conveniently separated and moved without open-flame operations.6.4.1.2 When designing the process equipment, the isolation of technically realizable must be considered to prevent a certain equipment from the explosion of the adjacent equipment. 6.4.1.2 When designing process equipment, it must be considered to prevent a certain equipment explosion waves. adjacent equipment.6.4.2 Workshops should be protected by automatic explosion suppression systems.6.4.3 Explosion relief6.4.3.1 Where process equipment is not strong enough to withstand the pressure generated by a fully developed internal dust explosion, explosion relief ports must be provided. The size of the relief port should be GB / T15605 or dust explosion standard tests and practical examination as a basis to ensure that the maximum possible explosion relief pressure may be achieved in the event of an accidental explosion does not exceed the maximum internal pressure that can be withstood by the container.6.4.3.2 with inline piping of the process equipment, usually recommended design indicators should be able to withstand the internal overpressure of at least 0.1MPa.6.5 Prevention of secondary explosion 6.5 .1 Do the usual cleaning work6.5.1.1 All production workshops that may accumulate dust should be cleaned in a timely manner.6.5.1.2 Prohibit the use of compressed air for blowing.6.6 Individual protection and salvage6.6.1 Individual protection6.6.1.1 The production personnel must be in accordance with the relevant provisions of GBl1651, the use of labor protection products.6.6.1.2 In the process of using inert gases or places that can release toxic gases must be equipped with respiratory protection devices that can purify the air.6.6.1.3 In the workplace, it is strictly prohibited for the production personnel to wear clothes and pants made of chemical fiber fabric close to the body.6.6.2 Rescue6.6.2.1 The company prepares a rescue plan for accidents, such as dust explosions.6.6.2.2 In close cooperation with and under the guidance of the local fire fighting department, the entire workforce shall be regularly trained in fire-fighting and rescuing. 6.7 Fire extinguishing 6.7.1 It is prohibited to use fire extinguishing methods that can raise the deposited powder to form a dust cloud.6.7.2 When extinguishing a fire, a nozzle with good atomization effect must be used to ensure that the extinguishing agent can form a cloud of dust and a curtain of liquid mist.6.7.3 The correct choice of extinguishing agent should be made in accordance with the physicochemical nature of the dust.6.7.4 If the contact between the combustible material and the water can generate explosive gas, it is prohibited to use water to extinguish the fire.6.7.5 The company must use water to extinguish the dust explosion. Prohibit the use of water to extinguish the fire.6.7.5 Fire extinguishing facilities and extinguishing agents must be readily available.6.8 Reasonable design of the structure and layout of the building (structure).6.8.1 Installation of dust explosion hazardous process equipment or the presence of explosive dust building (structure), they should be separated, and leave sufficient safety distance.6.8.2 The building should be a single-story building, the roof of the appropriate use of lightweight structures, can also be used to "explosion-resistant". 6.8.3 Structures for multi-storey buildings 6.8.3.1 Multi-storey buildings should be of frame construction; where such construction is not feasible, explosion venting openings of sufficient size must be provided in the walls. 6.8.3.2 Where windows or other openings are used as explosion venting openings, it must be ensured that they are capable of efficiently venting the explosion in the event of an explosion. 6.8.3.3 The building should be constructed of a single-storey building, with lightweight construction for the roof, or with a "blast-resistant" structure. to deflate.6.8.4 Hazardous process equipment in the plant should be located higher in the building and closer to the outside walls.6.8.5 Equipment, beams, racks, walls, etc., must have a surface structure that can be easily cleaned, and should not have upwardly spliced planes.6.9 Evacuation Routes6.9.1 There must be a sufficient number of evacuation routes in the work area. The number and location of evacuation routes will be determined by the Human Resources Safety Office. 6.9.2 Evacuation routes must be clearly signposted and illuminated for accidents. VII ﹑ Penalties 7.1 The supervisor of each department shall strictly supervise the personnel of this department to comply with the operation regulations of the sand blasting workplace, and inspect from time to time to discover and stop the illegal operation behavior in time. For those who do not work in the sand blasting place according to the requirements of this regulation, the operator will be given a demerit, the on-site supervisor will be given a minor demerit, the department supervisor will be given a warning penalty, and those who have accidents due to the operation, which cause damages and casualties to the company, will be given a demerit and handed over to the judicial authorities. 7.2 If the foreign construction units and individuals violate the terms and conditions of this regulation, they will be contacted by the department supervisors and the persons in charge and will be regarded as the company's employees who are subject to the same penalties as those for illegal operation in the sand blasting place. 7.3 Other unregulated matters shall be implemented according to the employee handbook and relevant regulations of the company.
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