"Five Necessities and Five Prohibitions" in Five Provisions on Safe Operation in Limited Space (Order No.69): First, the operation approval system must be strictly implemented, and it is strictly forbidden to enter the limited space without authorization; The second is to "ventilate first, then test, then operate", and it is strictly forbidden to operate unqualified after ventilation test.
Third, personal protective equipment such as poisoning prevention and suffocation must be equipped, and safety warning signs should be set up. It is forbidden to work without protective monitoring measures; Fourth, it is necessary to conduct safety training for operators, and those who fail to pass the education and training are strictly prohibited from taking up their posts; Fifth, we must formulate emergency measures and equip the site with emergency equipment. Blind rescue is strictly prohibited.
The on-site person in charge, guardianship personnel, emergency rescue personnel and operators who participate in or engage in confined space operations shall receive special safety training in confined spaces. Special safety training in a limited space should have special training records, which should be signed and confirmed by participants. Personnel who have not received special safety training and passed the examination shall not engage in limited space management and operation.
Related contents of limited space operation:
Limited space refers to a closed or partially closed space, with narrow entrances and exits, not designed as a fixed workplace, and poor natural ventilation, which may easily lead to the accumulation of toxic, harmful, flammable and explosive substances or insufficient oxygen content. Limited space operation refers to the operation activities of workers entering a limited space.
Common confined space operations include: cleaning mud pools, sedimentation tanks, brewing pools, septic tanks, sewers, septic tanks, cellars, etc. Piling wells, shafts, mines, etc. On site; Reactors or kettles, tankers, storage tanks, steel cylinders and other containers, as well as pipes, flues, tunnels, ditches, pits, wells, culverts, cabins, underground warehouses, warehouses, barns and so on.
Working in these places with limited space, if the ventilation is poor and the concentration of asphyxiating gas is high, the oxygen content in the air will drop. When the oxygen content in the air drops below 16%, people may have symptoms of hypoxia; When the oxygen content falls below 10%, there may be different degrees of consciousness disorder and even death. When the oxygen content drops below 6%, sudden death may occur.