Liquefied Hydrocarbon Gas Conditioning

Our LHG conditioning systems radiate quality and safety, from the basic design to the final touches.

Our LHG conditioning systems radiate quality and safety, from the basic design to the final touches.

Evaporator systems must work safely and efficiently at all times, so we build quality and reliability into our skid-mounted units right from the start. Every component, down to the valve seal material, is selected for its optimal suitability for every specific situation. Also the operating principle is fine tuned to each case.

That’s why many of the world’s leading Engineering, Procurement & Construction (EPC) contractors and end users turn to Petrogas for peace of mind. We have supplied evaporating systems to refineries, power plants and industrial consumers.

LHG Handling

Liquefied Hydrocarbon Gases (LHG) Handling

LHG’s are transported in theit liquid form to obtain the maximum energy density. Petrogas can supply the complete loading & unloading systems, including controls and firefighting installation. All systems comply with marine standards and are thouroughly tested and inspected prior to installment on ships.

LHG Evaporators

Liquefied Hydrocarbon Gases (LHG) Evaporators

Storing and transporting LHG in their liquid form is cheaper, but it often will have to be gaseous for use. At Petrogas we design and build LHG conditioning systems that facilitate transport or prepare the LPG prior to consumption. Amongst these systems are the liquid storage and forwarding pump systems; vaporizing; superheating and gaseous pressure controlling systems; as well as secondary systems such as condensate extraction and storage. We make sure all systems are perfectly tuned in to one other, making sure you get the most out of your feed stock.

Various chains of hydrocarbons are available in liquefied form, from Ethane (C2) to Pentane (C5), as well as mixtures such as Liquefied petroleum gas (LPG or LP Gas) which consists of a mixture of propane and butane (C3/C4). In comparison to heavier hydrocarbons (oils), these lighter hydrocarbon fuels generate lower amounts of emitted carbon dioxide per unit of heat produced, and are commonly used as an alternative fuel for cars and as chemical feedstock.

From a global warming perspective, fuel selection can play a significant role in reducing emissions of carbon dioxide and other greenhouse gases. LHG generate fewer carbon emissions than gasoline (petrol) and broadly equivalent emissions to diesel.

In addition, the carbon footprint of LHG is 20% lower than that of fuel oil and 50% lower than coal. LHG therefore helps to reduce CO2 emissions and helps to reduce Black Carbon (BC) emissions, which are the second biggest contributor to global warming and can cause serious health problems. LHG are a better source of energy in the transition period from fossil fuels to renewable sources.

LNG Evaporators

Liquefied Natural Gas (LNG) Evaporators

LNG is transported and stored as a liquid. LNG Evaporators return the LNG to its gaseous state. To evaporate LNG the temperature needs to be raised, this can be done through a variety of techniques using different types heat sources. Examples of heat sources are seawater, ambient air, (waste) heat, steam or hot water. Depending on your local situation we select the most economical method.

Process Description

Process Description LPG

LPG is transported and stored in liquid phase under high pressure, at ambient temperature. In order for your combustion equipment to be able to use the propane it must undergo a phase change (vaporization) from liquid to gaseous. Submerged motor forwarding pumps send the LPG through the pre-heater to the vaporizer. The vaporized LPG is superheated afterwards to prevent condensation in downstream piping and control valves maintain a stable pressure towards the consumer (Gas Turbine or other). The control and monitoring system ensures a stable pressure and flow and maximize up time.

Process Description LNG

LNG is transported and stored in liquid phase under atmospheric pressure, but cooled to temperatures as low as -190°C. To evaporate LNG, temperature can be added using various techniques; ambient air, (sea) water, steam or hot water. For each case Petrogas will choose the best possible option based on your preferences, available resources and process conditions.


Our LPG systems are designed for simple operation and easy maintenance. Our modular skid-mounted design shortens erection & commissioning time required on site according to the turnkey concept.

Since Petrogas has extensive on-site experience, operate-ability and maintainability are embedded in the basic design. The system layout allows for safe and easy access to major components and caters for easy heater bundle retracting when cleaning is due.

Petrogas works with preferred partners, but is brand independent; we can follow any list of preferred vendors you may have. This ensures you get the most out of any spare parts plan you may already have in place.


The kettle type vaporizer entails a very stable liquid level and subsequent stable pressure. Smart design feature like this create an inherently stable system, simplifying operation and drastically reducing operation failures.

Sophisticated data acquisition helps determining preemptive maintenance routines, prolonging system lifetime and productivity. Petrogas can assist in setting up these routines, based on years of experience gathered in the field over more than 6 decades.

The system checks itself: System diagnostics detect any variance in system performance, alerting operators of necessary maintenance or repairs; The condensate is checked for LPG traces prior to discharge to guarantee system safety and the heater capacity is constantly monitored to indicate fouling due to pollutants. Alerts are sent to maintenance personnel prompting for action and, if required, automaticaaly trigger our service department, dispatching parts and/or engineers.


To stay at the forefront of technology we continually develop and innovate the LPG systems. Our passionate engineers integrate the latest practices in our designs.

The vaporizing system can be combined with a mixing system to seamlessly incorporate the LPG unit in with another, creating a multi-fuel conditioning system.

The experience Petrogas has with LPG systems and phase transitions in general allow us to provide you with the optimal design in terms of productivity, reliability, accessibility and overall quality.

Wherever you are in the world, all our electrical and mechanical systems are designed and built to suit local conditions and regulations. We built according to the highest standard. State of the art components and systems are customized to your exact needs. At the hand of the project specific design we will start with selecting the component selection procedure. The selection is based upon extensive research, beyond the obvious quality, lead time and cost, we look at: safety, energy efficiency, fit-for-purpose, technological alternatives and the availability and exchangeability of spare sparts. All to ensure that we can guarantee your system is future proof and will be able to run on maximum efficiency during its operational lifetime.

System sections

Loading & Unloading
Vapor Recovery Compressor
Private: Fire Fighting System
Liquid Storage Vessels
Forwarding Pumps & Buffering
Vaporizer & Super Heater
Condensate System
Flare System

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Liquefied Hydrocarbon Gas Conditioning


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