Gas Detection is an important procedure when it comes to marine ship transportation in UAE. In this blog, let’s see what the various hazardous gases are and how they can be detected.
The Importance of Gas Detection in Ships
Gas in enclosed spaces on ships can be dangerous for both the ships and mariners. Four main gases are monitored in any environment: Oxygen, Carbon Monoxide, Hydrogen Sulfide, Methane, or other combustible gases. Portable gas detectors can be configured to detect these four gases simultaneously. The screen shows the levels of each gas and provides audible and visible alarms if flammable or toxic gases are present—giving you an instant snapshot of the safety level of the air in that area. Ships have confined spaces that, if left unchecked, can become death traps—the crew could easily become unconscious before realizing gases are present.
Deadly and Poisonous Gases
Some gases are more deadly or poisonous than others. Thus, keeping gases in their original containers and labeling them correctly using conventional labeling protocol is essential.
Carbon Monoxide
Carbon Monoxide is a mild gas but is largely present as a product of smoke from large fires or internal combustion engines, poorly ventilated heaters, and fuel stoves. While Carbon Dioxide is non-toxic, the danger of this gas is that it displaces breathable air in enclosed spaces, and being heavier than air, it can accumulate at the bottom.
Cyanide and Its Risks
Cyanide is used to fumigate ships, and the crew risks cyanide exposure when fumigation isn’t carried out properly, especially by untrained workers.
Irritant Gases
Irritant gases that accumulate at the bottom of enclosed spaces include Phosgene, Chlorine, or Ammonia. Exposure to these gases can cause severe respiratory issues for the crew.
Flammable Liquid Vapours
Flammable Liquid Vapours are heavier than air and can accumulate at the bottom of holds or storage lockers. Though not toxic, they can cause asphyxiation by displacing oxygen and breathable air. Examples include LPG, Calor Gas, Propane, and Butane.
Freons and Their Hazards
Freons are used as refrigerants, and if inhaled, they can cause frostbite in the respiratory tract. Heavier exposure can lead to heart damage, abnormal heart rhythms, and sudden death.
Hydrogen Cyanide and Its Effects
Hydrogen Cyanide is lighter than air and can accumulate at the top of enclosed spaces, dispersing rapidly with proper ventilation. Inhaling small amounts can cause headaches, dizziness, and vomiting, while larger amounts may cause fainting, gasping, irregular heartbeats, seizures, and even rapid death.
Hydrogen Sulphide and Its Dangers
Hydrogen Sulphide, known as "Rotten Egg Gas," is heavier than air and accumulates at the bottom of holds. It is a product of organic matter decomposition and is highly toxic and explosive. Although its smell is initially detectable, it poisons the sense of smell, making it even more dangerous. Low concentrations irritate the mouth, nose, and eyes, while higher concentrations cause symptoms similar to hydrogen cyanide.
Methane and Its Risks
Methane, while relatively non-toxic, displaces air and can cause asphyxiation. Its primary risk, however, is its combustibility.
Why Gas Detection Systems Are Essential
These examples make it clear why a gas detection system is essential for any ship. Working in environments with hazardous gases, particularly in confined spaces, can put the crew at great risk.
Fixed vs. Portable Gas Detection Systems
The marine industry uses both fixed gas detectors and portable gas detectors. Many ships require a permanent gas detection system. Although not all vessels are legally required to install fixed gas detection systems, this type of protection monitors confined spaces, such as cargo pumprooms or refrigerated tanks, and keeps them safe from harmful gas accumulation 24/7.
Portable Gas Monitors
Portable gas monitors are worn by personnel and used to test an area immediately before entering it. These devices are vital for ensuring the safety of the crew, especially in confined spaces.
Maritronics Gas Detection Services
Maritronics engineers can help you install safe gas detection systems on ships in compliance with universal maritime laws. With some of the best service engineers in the UAE, Maritronics is a reliable partner for all your ship maintenance and safety needs.
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