Lifting hook safety disabling scenarios and risk prevention and control
lifting hook is a core component of lifting operations, and its safety is directly affected by environmental factors. In the following specific environments, it is strictly prohibited to use hooks to avoid equipment failure or casualties.
1. Harsh meteorological environment
Several winds above level 6: During open-air operations, the wind speed exceeds 13.8m/s will cause the hanging object to swing out of control, which may easily cause the risk of decoupling or collision.
Severe weather: heavy rain, heavy snow, heavy fog and other weather will reduce visibility, and at the same time cause the equipment surface to be slippery, affecting the operator's judgment of the state of the lifting object, and the operation needs to be suspended.
2. High-voltage electric field and corrosion environment
Close to transmission lines: When the hook or hanging object enters the safe distance of the high and low-voltage transmission lines (such as the 10kV line must be kept at a distance of more than 3 meters), the operation must be stopped immediately to prevent arc discharge or induction breakdown.
Corrosive media exposure: In acid-base corrosive gases, salt spray and other environments, the hook material is prone to intergranular corrosion or hydrogen embrittlement, and corrosion-resistant materials (such as 316L stainless steel) or protective coatings are required.
3. Overlimit load and structural defect scenarios
Overload operation: The rated load of the hook is based on the material strength design. Exceeding the calibration value (such as the larger load of the Q235 steel hook ≤ 25 tons) will cause metal fatigue and fracture.
When the hook has defects such as cracks, opening degree exceeding the standard (more than 10% of the original size), and hook body twisting exceeds 10°, it must be scrapped immediately, and welding and repair are strictly prohibited.
4. Special working conditions and operation taboos
High temperature radiation environment: When lifting molten metals, a special hook for QDY metallurgical casting crane needs to be used, which needs to be above 300℃ for temperature resistance. Ordinary hooks are prone to tempering and brittlement at high temperatures.
Complex space operations: In narrow channels and cross-operation areas of multiple equipment, it is necessary to ensure that there are no obstacles in the rotation radius of the hook to avoid collisions and chain accidents.
5. Scenarios for lack of safety protection
No isolation measures: When there is no warning area under the hook or there is no dedicated supervision, lifting is prohibited to prevent people from entering dangerous areas by mistake.
Signal system failure: If the command signal cannot be clearly transmitted at night or under obstructed vision, the operation must be stopped and the backup communication equipment must be enabled.
By establishing an environmental risk assessment mechanism and strengthening regular equipment inspections (such as detecting internal cracks of the hook), the risk of using the hook can be avoided and the inherent safety of lifting operations can be ensured.
lifting hook is a core component of lifting operations, and its safety is directly affected by environmental factors. In the following specific environments, it is strictly prohibited to use hooks to avoid equipment failure or casualties.
1. Harsh meteorological environment
Several winds above level 6: During open-air operations, the wind speed exceeds 13.8m/s will cause the hanging object to swing out of control, which may easily cause the risk of decoupling or collision.
Severe weather: heavy rain, heavy snow, heavy fog and other weather will reduce visibility, and at the same time cause the equipment surface to be slippery, affecting the operator's judgment of the state of the lifting object, and the operation needs to be suspended.
2. High-voltage electric field and corrosion environment
Close to transmission lines: When the hook or hanging object enters the safe distance of the high and low-voltage transmission lines (such as the 10kV line must be kept at a distance of more than 3 meters), the operation must be stopped immediately to prevent arc discharge or induction breakdown.
Corrosive media exposure: In acid-base corrosive gases, salt spray and other environments, the hook material is prone to intergranular corrosion or hydrogen embrittlement, and corrosion-resistant materials (such as 316L stainless steel) or protective coatings are required.
3. Overlimit load and structural defect scenarios
Overload operation: The rated load of the hook is based on the material strength design. Exceeding the calibration value (such as the larger load of the Q235 steel hook ≤ 25 tons) will cause metal fatigue and fracture.
When the hook has defects such as cracks, opening degree exceeding the standard (more than 10% of the original size), and hook body twisting exceeds 10°, it must be scrapped immediately, and welding and repair are strictly prohibited.
4. Special working conditions and operation taboos
High temperature radiation environment: When lifting molten metals, a special hook for QDY metallurgical casting crane needs to be used, which needs to be above 300℃ for temperature resistance. Ordinary hooks are prone to tempering and brittlement at high temperatures.
Complex space operations: In narrow channels and cross-operation areas of multiple equipment, it is necessary to ensure that there are no obstacles in the rotation radius of the hook to avoid collisions and chain accidents.
5. Scenarios for lack of safety protection
No isolation measures: When there is no warning area under the hook or there is no dedicated supervision, lifting is prohibited to prevent people from entering dangerous areas by mistake.
Signal system failure: If the command signal cannot be clearly transmitted at night or under obstructed vision, the operation must be stopped and the backup communication equipment must be enabled.
By establishing an environmental risk assessment mechanism and strengthening regular equipment inspections (such as detecting internal cracks of the hook), the risk of using the hook can be avoided and the inherent safety of lifting operations can be ensured.
lifting hook is a core component of lifting operations, and its safety is directly affected by environmental factors. In the following specific environments, it is strictly prohibited to use hooks to avoid equipment failure or casualties.
1. Harsh meteorological environment
Several winds above level 6: During open-air operations, the wind speed exceeds 13.8m/s will cause the hanging object to swing out of control, which may easily cause the risk of decoupling or collision.
Severe weather: heavy rain, heavy snow, heavy fog and other weather will reduce visibility, and at the same time cause the equipment surface to be slippery, affecting the operator's judgment of the state of the lifting object, and the operation needs to be suspended.
2. High-voltage electric field and corrosion environment
Close to transmission lines: When the hook or hanging object enters the safe distance of the high and low-voltage transmission lines (such as the 10kV line must be kept at a distance of more than 3 meters), the operation must be stopped immediately to prevent arc discharge or induction breakdown.
Corrosive media exposure: In acid-base corrosive gases, salt spray and other environments, the hook material is prone to intergranular corrosion or hydrogen embrittlement, and corrosion-resistant materials (such as 316L stainless steel) or protective coatings are required.
3. Overlimit load and structural defect scenarios
Overload operation: The rated load of the hook is based on the material strength design. Exceeding the calibration value (such as the larger load of the Q235 steel hook ≤ 25 tons) will cause metal fatigue and fracture.
When the hook has defects such as cracks, opening degree exceeding the standard (more than 10% of the original size), and hook body twisting exceeds 10°, it must be scrapped immediately, and welding and repair are strictly prohibited.
4. Special working conditions and operation taboos
High temperature radiation environment: When lifting molten metals, a special hook for QDY metallurgical casting crane needs to be used, which needs to be above 300℃ for temperature resistance. Ordinary hooks are prone to tempering and brittlement at high temperatures.
Complex space operations: In narrow channels and cross-operation areas of multiple equipment, it is necessary to ensure that there are no obstacles in the rotation radius of the hook to avoid collisions and chain accidents.
5. Scenarios for lack of safety protection
No isolation measures: When there is no warning area under the hook or there is no dedicated supervision, lifting is prohibited to prevent people from entering dangerous areas by mistake.
Signal system failure: If the command signal cannot be clearly transmitted at night or under obstructed vision, the operation must be stopped and the backup communication equipment must be enabled.
By establishing an environmental risk assessment mechanism and strengthening regular equipment inspections (such as detecting internal cracks of the hook), the risk of using the hook can be avoided and the inherent safety of lifting operations can be ensured.
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