The difference between potential accident hazards and sources of danger

Let’s continue sharing: (In simpler terms:) First, let’s look at the definitions of both. A hazard is a source or condition that may cause injury to people, illness, property damage, damage to the working environment, or other types of losses. An accident risk, on the other hand, refers to unsafe human behaviors, unsafe conditions of equipment and facilities, as well as management deficiencies within a production system that can lead to accidents. In safety management, we need to study hazard sources and then control them. Generally, the study of hazard sources falls into two categories: the first category involves the study of energy, while the second category involves the study of the carriers of energy. For example, a factory has 100 kg of gasoline; gasoline is a flammable and explosive chemical, so it constitutes a hazard source. Since the gasoline is stored in tanks, those tanks also represent hazard sources. But we are already aware of the dangerous properties of gasoline, and it is not possible to change those properties since the manufacturing process cannot be replaced. Therefore, we can only focus on studying and controlling its container, that is, the storage tanks. To ensure safety, we need to regularly check whether the tanks have good sealing, whether there is any corrosion, whether they are properly grounded, and whether they are kept away from sources of fire. This is what constitutes the study and control of energy carriers. If, during safety inspections, we find that the tanks are not grounded, are corroded, are deformed, or are exposed to direct sunlight, then we say that there are potential hazards for accidents! This can be expressed with a simple equation: Hazard + unsafe human behavior/unsafe conditions of objects/management deficiencies = potential accident risks. For example, a kitchen knife used in the home is a hazard as it can cause cuts; however, if the knife is left carelessly on the table after use, there is a risk that it might fall and injure someone’s foot – this represents an unsafe condition of the object. In other words, knife + unstable placement on the table = potential risk. In other words, potential accident hazards are definitely sources of danger, but sources of danger are not necessarily potential accident hazards. In simple terms, safety management involves identifying sources of danger, controlling them, detecting potential hazards, investigating accidents, and carrying out emergency rescue efforts. One can refer to GB6441 to identify the sources of danger present in a company, and use GB13861 to detect potential safety hazards; these two standards provide very detailed guidelines. To understand this further, what is the difference between what we call safety inspections and the detection of potential hazards? In my opinion, a safety inspection can be seen as a process of identifying sources of danger; of course, potential hazards also need to be addressed. Meanwhile, the detection of potential hazards focuses on assessing the control status of those sources of danger that have already been identified. I hope it’s a little helpful to everyone!

Previously, I did have some understanding of the difference between \"hazards\" and \"potential accident causes\", but I had never made a distinction between \"safety inspections\" and \"identification of potential hazards\"; now I realize that there are indeed differences and distinct focuses in each.

The purpose of modern corporate safety management is to prevent and control accidents； To prevent and control accidents, it is necessary to clarify the mechanism behind their occurrence (understanding the causes of accidents) ； According to the theory of accident causes, accidents result from various factors, which can be categorized as unsafe conditions of objects, unsafe behaviors of people, and management deficiencies ； ——This is the importance and necessity of identifying and controlling hazard sources. Enterprise risk management is the key to the operation of safety production standardization/HSE/OHSMS; it serves as the foundation and starting point for corporate safety management, and is also its core, with risk control being the ultimate goal.

The principle of eliminating potential hazards, which involves essentially removing the causes of accidents, is an ideal, proactive, and progressive measure for accident prevention. The fundamental approach is to replace old, unsafe systems and processes with new ones, using advanced systems, technologies, and methods in order to eliminate the possibility of accidents from the root. 　　For example: replacing flammable materials with non-flammable ones; using detonator tubes instead of fuses for initiation; improving machinery and equipment to eliminate hazardous factors in the working environment and those related to human operation, as well as reducing the impact of noise and dust toxins on humans, thereby achieving occupational safety and health in essence. 　　The principle of reducing the values of potential risk factors is to minimize the system’s level of risk when it is not possible to eliminate the systemic danger. Once a system accident occurs, its consequences will be minimized. For example, drill tools employ double-layer insulation; transformers are used to reduce the voltage in the circuits; and safety valves and pressure relief valves are installed in high-pressure containers to prevent hazards from occurring. 　　The redundancy principle enhances the safety factor of a system and increases its safety margin through measures such as multiple backups and redundant systems. For example: reducing the rated power in industrial production; increasing the strength of steel cables; using dual engines in aircraft systems; adding backup devices or equipment to the system, and so on. 　　The lockout principle is implemented in the system through mechanical interlocking or electrical interlocking of certain components, as a condition to ensure safety. Such as the safety interlocks of stamping machines, etc. 　　The weak link principle involves introducing weak links within a system, in order to achieve overall system security at the cost of minimal, localized losses. Such as fuses in electrical circuits, explosion-proof membranes in gas generators, pressure relief valves in pressure vessels, etc. They cause damage as soon as a dangerous situation arises, thereby releasing or blocking energy to ensure the safety of the entire system. 　　The robustness principle ensures safety by increasing the strength of the system. Measures such as increasing the safety factor and enhancing structural strength. 　　The principle of personal protection involves providing appropriate protective equipment and gear based on the nature and conditions of different tasks. Take passive measures to mitigate the harm or losses caused by accidents and disasters. 　　The principle of replacing human operators is to use machines, manipulators, automatic controllers, or robots to carry out certain tasks instead of humans, under conditions where it is impossible to eliminate and control dangerous and harmful factors, thereby preventing harm to the human body caused by such factors. 　　The principle of warning and prohibition messages uses light, sound, color, or other indicators as a means to convey organizational and technical information in order to ensure safety. Such as posters, safety signs, board alarms, etc.

I. Principle of eliminating potential hazards: This involves eliminating accident risks at their root, and it represents an ideal, proactive, and progressive approach to accident prevention. The basic approach is to replace old systems, technologies, and processes with new ones in order to eliminate accidents fundamentally. For example: use non-flammable materials in place of flammable materials ； Improve mechanical equipment and eliminate hazardous factors related to human operation and the working environment. II. Principle of reducing the values of potential hazard factors: When it is not possible to eliminate the risks associated with a system, efforts should be made to reduce the level of risk within that system, thereby minimizing the severity of the consequences in the event of an accident. For example: Drill tools employ double insulation measures ； Use a transformer to reduce the circuit voltage ； Safety valves and pressure relief valves are installed in high-pressure containers to control the occurrence of hazards, etc. III. Principle of redundancy: This involves enhancing the system’s safety factor and increasing its safety margin through measures such as multiple backups and redundant systems. For example: increasing the strength of steel cables ； The aircraft is equipped with twin engines ； Add backup devices to the system, etc. IV. Lockout principle: That is, in the system, mechanical interlocks or electrical interlocks of certain basic components are used as conditions to ensure safety. For example: safety interlocks for stamping machinery, door interlock devices installed on metal shearing machine rooms, automatic circuit protectors, etc. V. Principle of energy barriers: This involves establishing barriers between people, objects, and sources of danger to prevent accidental release of energy from affecting humans and objects, thereby ensuring the safety of both people and equipment. For example, safety nets for high-altitude work in construction, and reactor containment structures, all serve as barriers. VI. Principle of distance protection: When the harmful effects of dangerous and hazardous factors decrease as distance increases, it is necessary to keep as much distance as possible between people and these sources of danger. For example, in occupations that are exposed to hazardous factors such as noise sources and radiation sources, increasing the distance can be used to reduce occupational risks; furthermore, chemical plants should be located away from residential areas, and a safe distance should be maintained during blasting operations. VII. Principle of time protection: Reducing the amount of time that people spend in an environment containing hazardous or occupational disease-causing factors to a safe level. For example, for jobs involving exposure to dust, toxic and harmful gases, noise, and radioactive substances, reduce the duration of each exposure. VIII. Principle of weak links: This involves introducing weak links into the system, in order to achieve overall system security at the cost of minimal, localized losses. For example: fuses in electrical circuits, safety valves in boilers, explosion-proof membranes in gas generators, pressure vessel relief valves, etc. These components fail before a dangerous situation occurs, thereby releasing or blocking energy to ensure the safety of the entire system. IX. Principle of Robustness: This is a countermeasure to the principle of weak links, namely ensuring the safety of a system by increasing its strength. For example: increasing the system safety factor and enhancing the structural strength of the equipment. X. Principles of personal protection: That is, depending on the nature and conditions of different tasks, appropriate protective equipment and tools should be provided to workers. For example: providing dust masks for workers who are exposed to dust, and protective face shields for welders, etc. 11. Principle of replacing workers: That is, when it is impossible to eliminate and control hazardous and harmful factors, tools and machinery are used to replace manual operations in order to prevent such factors from causing harm to the human body. For example: using handling machinery to lift heavy objects, and employing robotic arms in the cutting section to replace manual handling of workpieces. XII. Principles of Warning and Prohibition Messages: Light, sound, color, or other signs are used as means to convey organizational and technical information in order to ensure safety. For example: Install safety warning signs in work areas where there are hazardous factors or risks related to occupational diseases

Main methods of risk assessment; Commonly used risk assessment methods: For tasks and work processes, JSA (Job Safety Analysis) – conducts a safety analysis of specific tasks; SEP (Enterprise Risk Assessment) – performs a comprehensive safety, health, and environmental risk assessment based on the existing conditions and operations of an enterprise. For equipment and processes, FMECA (Failure Mode and Effects Analysis) – evaluates the risks associated with equipment; HAZOP (Hazard and Operability Study) – assesses the risks in process flows. For accident incidents, FTA (Fault Tree Analysis) – analyzes the probability of causes for accidents that have occurred; ETA (Event Tree Analysis) – analyzes the probability of causes for identified incidents

The moderator’s description is vivid and easy to understand; I’ve learned it