Confined spaces harbor immense risks. Especially with the arrival of winter cold waves, the risks of confined space operations increase sharply. Due to their unique structure, these spaces exhibit typical characteristics such as abnormal gas environments, concealed sudden risks, and limited rescue conditions, urgently requiring upgraded safety management through technological innovation.
What is a Confined Space?
A confined space is a closed or partially closed space that is not designed as a fixed workplace, but allows personnel to enter and work, potentially leading to the accumulation of toxic, harmful, flammable, and explosive substances or insufficient oxygen. Common confined spaces include: Underground confined spaces: buried pipelines, sewage wells, septic tanks, etc.; Above-ground confined spaces: water tanks, fermentation tanks (such as sludge treatment tanks), grain silos, etc.; Enclosed equipment: reaction vessels, boilers, gas storage tanks, etc.
Four “Invisible Killers” in Confined Spaces: Gas Poisoning
Hydrogen sulfide: Colorless, highly toxic; high concentrations can cause “electrocution-like death”;
Carbon monoxide: Colorless and odorless; acute poisoning causes nausea and coma;
Organic solvents: Such as benzene and toluene, which damage the central nervous system through inhalation and skin absorption.
Oxygen deficiency and asphyxiation—When the oxygen content is below 19.5%, it can easily cause dizziness, coma, and even death.
Explosion hazards—When flammable gases such as methane and hydrogen mix with air and reach their explosive limits, they will explode upon contact with an open flame.
Physical injuries—Secondary disasters such as collapses, falls, and electrical leaks.
From “Passive Response” to “Active Defense”
Before Operation
⊙Required Approval: Develop a specific work plan, clearly define personnel responsibilities, and prohibit work without approval.
⊙Risk Identification: Identify the location of the confined space, hazardous factors (such as gas type and ventilation conditions), and set up warning signs.
⊙Ventilation and Testing: Force ventilation for at least 30 minutes using explosion-proof fans; test for oxygen, combustible gases, hydrogen sulfide, carbon monoxide, etc., and work can only proceed after all levels are within acceptable limits.
⊙Protective Equipment: Workers must wear positive-pressure self-contained breathing apparatus, full-body safety harnesses, and carry gas detectors and communication equipment.
During Operation
⊙Strict Monitoring: Monitoring personnel must be on duty at all times and are prohibited from leaving their posts without authorization.
⊙Strict Protection: Wear positive-pressure self-contained breathing apparatus and full-body safety harnesses; entry without protection is prohibited.
⊙Strict Rotation: Workers must rotate every 30 minutes to avoid prolonged exposure.
⊙Strict Monitoring: Continuous ventilation and real-time monitoring of gas concentrations are required; work is prohibited if concentrations exceed safe levels.
⊙Strict Communication: Use explosion-proof walkie-talkies to maintain contact; solo operations are prohibited.
Common Misconceptions: Five High-Risk Behaviors
■ Ventilation without testing before starting work;
■ Rescuers entering blindly without protection;
■ Failure to develop an emergency plan;
■ Supervisors leaving midway;
■ Failure to clean up tools left at the work site after operation.
Emergency Rescue Measures
Technology Empowering Safety: Chicheng Electric’s “Safety Shield”
Given the potential presence of multiple toxic and harmful gases in confined spaces, posing a serious threat to the lives and health of workers, Chicheng Electric, leveraging its deep technological expertise, has launched a range of instruments covering single-gas and multi-gas detection, supporting both pump-suction and diffusion methods. These instruments provide workers with accurate, efficient, and reliable gas monitoring solutions.
Single-Gas Detectors: Focused on detecting specific gases (such as CO, H₂S, O₂), suitable for long-term monitoring of specific gases in high-risk areas.
Multi-Gas Detectors: Capable of simultaneously detecting 4 or 6 gases (such as CO, H₂S, O₂, and combustible gases), improving operational safety and reducing the number of devices carried.
Pump-Suction Detectors: Chicheng Electric’s GC510 pump-suction gas detector features a built-in suction pump for gas sampling in hazardous areas where personnel cannot easily access, enabling long-distance gas concentration measurement.
Diffusion Detectors: Detectors directly contact ambient gases through sensors, suitable for real-time monitoring in open spaces or carried by personnel. Product Advantages: Four-fold alarm prompts—audio, visual, vibration, and LCD display—ensure timely warnings even in noisy environments.
Intelligent Operation: The instrument features password management to effectively prevent accidental operation. It supports querying and exporting data for easy accident tracing and analysis.
Durability and Portability: The casing is made of high-strength ABS engineering plastic or composite elastic rubber, making it waterproof, dustproof, and explosion-proof, adaptable to extreme environments from -40℃ to 70℃. The streamlined design is easy to grip. Low-power optimized design supports extended operation.
Wide Applications: Applied to multiple fields including industry, environmental protection, rescue, and civilian use, it has become an important tool for confined space operations and safety inspections.
Winter confined space operations are a life-or-death test at every step. From the golden rule of “ventilate first, then inspect, then work,” to the 24/7 protection of Chicheng Electric’s intelligent equipment, and the establishment of a scientific rescue system, only by integrating safety awareness into every detail can a solid line of defense for life be built.
