Why is an inert gas required on an oil tanker?
Inert gas system is the most important integrated system for oil tankers for safe operation of the ship. Inert gas is the gas that contains insufficient oxygen (normally less than 8 %) to suppress the combustion of flammable hydrocarbon gases. The concentration of inert gas is kept around 5% as a safety limit.
What is the requirement to the inert gas plant capacity?
Regulations and Requirements for I.G Blower The capacity of each blower must be 1.25 times the overall capacity of the cargo discharge system fitted onboard. This is to ensure that Inert Gas is always present in the cargo hold.
How do you produce inert gas?
Production. The inert gases are obtained by fractional distillation of air, with the exception of helium which is separated from a few natural gas sources rich in this element, through cryogenic distillation or membrane separation.
How big is a tanker truck?
A typical oil tanker semi-trailer has a length of 42.64 feet, a width of 8.2 feet and a depth of 12.14 feet. Tanker thickness is typically around 0.195 inches. These are ISO-compliant dimensions. Front axle weight (FAW) tankers trucks typically have a length of 39.03 feet, a width of 8.2 feet and a depth of 11.15 feet.
What are new tankers which shall be fitted with inert gas system?
3 require an inert gas system to be fitted on all new oil and chemical tankers of 8,000 dwt and above, (when transporting low-flash point cargoes of <60°C). Oil tankers above 20,000 dwt were already required to install such systems.
How long are oil tankers?
The most common length is in the range of 300 to 330 meters. Ultra Large Crude Carrier. Capacity exceeding 320,000 dwt. The largest tankers ever built have a deadweight of over 550,000 dwt.
What is the safety limit of inert gas on an oil tanker?
The safety limit of inert gas is 5%. All tanker ships use the Inert Gas System as a safety measure against explosion. The Inert Gas System and its Components Oil tankers use the following components in their IG system:
What are the components of inert gas generator systems for tankers?
Components of the inert gas generator systems for tankers are: – Inert gas generator. – Blower units which supply combustion air to the generator. – Deck water seal which prevents the back flow of hydrocarbon gases to unsafe areas. – Pressure/vacuum breaker that releases excessive pressure/vacuum from the cargo tanks.
What are the components of an IG System in oil tankers?
Oil tankers use the following components in their IG system: 1) Exhaust gases source The flue gas from the boiler or main engine exhaust is taken in as the inert gas source. 2) Inert gas isolation valve
How do oil tankers protect themselves from exploding?
All this is done to pull the concentration down to 10% which creates an atmosphere where the hydrocarbons inside the tank can no longer burn. The safety limit of inert gas is 5%. All tanker ships use the Inert Gas System as a safety measure against explosion. Oil tankers use the following components in their IG system: