The Differences Between LPG Trailer And LNG Trailer


Have you ever seen an LPG trailer passing by on the road? If yes, then what do you expect it to carry? Most of you might confuse such a trailer with a trailer of LNG. However, both the trailers are different in many ways. You shall look up to their differences to know the details about both the trailers.

What is an LPG trailer?

LPG tanker trailer

Liquid petroleum gas consists of two gases: propane and butane. Petroleum gases need a professional medium to be transported. An ordinary trailer cannot perform this job. Therefore. You need a specialized vehicle that can carry the LPG. So, for this, look for the LPG tank trailer.
When experts fill the tank with this gas, they reduce the pressure of the gas to a great extent. It helps to carry a great capacity of gas in the trailer. According to the manufacturers, such a trailer is designed to carry the gases for a maximum of 0.1 mega Pascal. In addition, one more thing to remember is that these trailers can only carry gases at a maximum of 50 degrees temperature.


The manufacturers design the LPG trailer in a way that includes two parts only. The first part is about the tank, while the second is about the carriage. What kind of gases could these carry? These trailers have the expertise to carry gases in liquid states like ammonia, hydrogen, and nitrogen at liquefied pressure.
There are always risks and hazards associated with these trailers. Often, you would have seen the danger sign highlighted at the back of the trailer body. Thus, manufacturers add special safety masseurs in designing the trailers. They usually design them with special insulation tools along with the pressure jackets.
Sometimes, they install measuring devices like a gauge to measure pressure, a thermostat to check temperatures, a liquid level measurement, etc. Then, you will find the safety valves that deliver the safety to the trailer’s driver.

What is an LNG trailer?

LNG tanker trailer

Do you know how natural gas gets delivered from one place to the area where people require it? Well, it is only possible with the best-designed LNG tank trailer. The manufacturers of such trailers specifically design them to carry the gas without causing any hazard to human life.
Similarly, you must consider that the LNG tanker trailer cannot carry the gas at natural room temperatures. However, before filling the tanks with the gas, experts cool down the gas to a negative temperature of -162 degrees centigrade.


The manufacturers of LNG tankers design the trailers with specialized features. They ensure that the trailer they design follows the standards of safety and precautions. Similarly, they take special importance in designing the valves. These valves are crucial for preventing human life from exposure to the gases. With the operation of a valve trailer, owners and drivers can control gas leakages.

The differences between an LPG trailer and an LNG trailer

Whether LPG or LNG gas, the gases can easily cause an explosion if you don’t take safety measures. Therefore, whenever you empty the tankers, you shall always thoroughly clean them to prevent the impurities from accumulating. Any exposure to impurities could produce a risk of combustion.
The LNG tanker trailer is very different from the trailer carrying LPG. That’s because of the differences between these two gases these carry. Also, the manufacturers assigned categories to the trailers depicting the grade these fall in. For example, an LPG tanker trailer falls under the A type category, while an LNG tanker falls under the category of B type.

Now, let’s see how the two trailers differ in all aspects.

  • Inspections

If you compare LPG tanks with the LNG semi trailer, you will notice a significant difference in their inspections. Both the trailers are under safety inspections, but an LNG undergoes more strict inspections than an LPG. The reason behind this is the explosiveness or the hazards associated with the gases.
You might find more safety valves, gauges, and meters to monitor an LNG trailer carrier’s gas flow, pressure, or temperature.

  • Design

The design completely varies when you consider an LPG trailer. The gases it carries are usually high-pressurized. Therefore, the manufacturers set a specific temperature for the tankers, around 50 degrees centigrade. This defined temperature is for both the gases and the tank.

In an LNG tanker trailer, the gases constantly rise and expand due to different factors that make gases more gaseous. Hence, they designed a system to control the gas pressure and a cooling system for the gases. Then, they designed eight supporting points for the LNG tanker trailer. The first four supporting points remain static while the others move in a sliding action.

  • Insulation

For manufacturing the LPG tankers, manufacturers use steel. Its body consists of two parts: insulation and a jacket for pressure. In comparison, the LNG tanker trailer comes with vacuum insulation. So, the insulation layer is composed of different materials, and aluminum foil is one of those. However, the other material is composed of fiber or nylon. The insulation layers help to transport the gases at low temperatures conveniently.

How do you purchase any of these tankers?

Consider some essential points when you are about to purchase any of these two tankers. The initial factor that affects your purchase is the safety measures associated with the tankers. You already know the nature of the gas you want a carrier for. Therefore, you should always consider the quality of the LPG trailers for sale or LNG ones.
Often, the manufacturers share the designs and structure of the tankers, letting buyers understand the transportation carrier. Thus, read the design and follow its structure. The next point is to look for the capacity of the carriage, whether you are searching for LNG trailers for sale or LPG. The transportation of pressurized and liquefied gases depends upon the capacity of the tankers. Thus, make sure you select it according to your requirements. Then, after you have selected, go for the loading and unloading processes of the tankers. These processes let you know the ease of handling the loading and unloading job.


Whether you are aiming to purchase an LPG trailer or a LNG one, there are many things that you should consider. Go through their designs, structure, features, and their differences to make things clear for you. Then, only take your decision.

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