Gas Carrier
Nautical Science

What are Gas Carriers and Its Types?

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Wondering what are Gas Carriers?? Let me help you to understand basics of Gas Carriers and types of gas carrier. Keep Scrolling and learn with us. 

Liquefied gases are hazardous to carry from one place to another, so here gas carriers comes into play. Gas Carriers are specialized ships which are designed to carry liquified gases (LNG & LPG). Let’s dive into the types of Gas Carriers.

Types of gas carrier according to the cargo carried:

1. LPG (Liquefied Petroleum Gas) Carrier:

LPG Carrier
Source: http://www.helioslpg.com/ourfleet

As the name suggests these types of gas tanker carries liquefied petroleum gases in bulk, Usually carries LPG(butane and propane), Ammonia, VCM, Propylene. These are common types of gas carrier. 

2. LNG (Liquefied Natural Gas) Carrier:

Source: https://www.energynewsbulletin.net/

These types of ship are designed for carrying liquefied natural gases in bulk. LNG ships can be propelled by boil off gas form cargo. LNG cargo is transported at -160°C.

3. Ethylene Carrier:

Ethylene Carrier
Source: https://www.wartsila.com

These types of ship carries ethylene at its atmospheric boiling point of -104°C and other gas cargoes except LNG. These are usually small size to handy size vessel.

Types of gas carrier according to the carriage condition:

1. Fully Pressurized Ships:

Fully Pressurized Gas Carrier

As the name suggests these are fully pressurized gas carrier and smallest in size. Re-liquefaction system is not provided in these gas carriers. Cargo is transported in cylindrical pressure tanks which are designed to withstand pressure of about 17.5 kg/cm2.

2. Semi-Pressurized and Refrigerated Ships:

Semi Pressurized Gas Carrier
Source: https://upload.wikimedia.org/wikipedia/commons/8/83/Gaschem_J%C3%BCmme.jpg

Semi Pressurized/Refrigerated ships consists of semi refrigerated plant and pressurized upto 8.5 kg/cm2. Suitable for carrying cargoes in a temperature range of approximately –33ºc to –50ºc.

3. Fully Refrigerated Ships:

Fully Refrigerated ship
Source: https://www.bairdmaritime.com/

These ships carry cargo at temperatures between –47ºc and -55ºc at about atmospheric pressure and have cargo carrying capacity of about 15000 m3 and 100000 m3. Equipped with re-liquefaction plant.

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