Oil and Gas

Globaltherm® Syntec: Synthetic heat transfer fluid (-3°C – 345°C)

Globaltherm® Syntec is the most popular synthetic heat transfer fluid for high-temperature operations. Engineered for exceptional performance, it operates efficiently at temperatures up to 345°C (653°F) and can be pumped down to -3°C (27°F).

This versatile thermal fluid is ideal for industries such as chemical processing, plastics manufacturing and biodiesel production, ensuring reliable performance in a wide range of indirect heating systems.

About Globaltherm® Syntec

Globaltherm® Syntec is built using advanced hydrogenated terphenyls chemistry, delivering superior results as a heat transfer fluid.

Designed for optimal thermal stability, this synthetic solution ensures operational efficiency even under demanding conditions. Its high-performance capabilities have made it a trusted choice for industrial fluid systems worldwide.

Whether it's maintaining service life in extreme conditions or maximising system efficiency, Globaltherm® Syntec outperforms traditional alternatives. This product is specifically formulated to help your heat transfer process run at full capacity while minimising maintenance and downtime.

Why choose Globaltherm® Syntec?

• Thermal stability: Engineered for excellent temperature tolerance and minimal degradation
• Operational efficiency: Helps maintain consistent perfor-mance across indirect heating systems
• Versatility: Suitable for a broad range of industries and applications
• Extended service life: Designed to reduce replacement frequency, saving costs over time
• Global reliability: Trusted in systems worldwide for con-sistent, high-level performance

With a proven track record in industrial thermal fluid systems, Globaltherm® Syntec offers unmatched reliability and efficiency. From enhancing the longevity of your heating system to supporting critical operations in high-temperature environments, this synthetic heat transfer fluid is designed to meet the unique demands of modern industries.

Scroll for more details

Parameter	Unit	Code (ASTM/ISO)	Result
Appearance	N/A	N/A	Clear to pale yellow liquid with a characteristic odour
Operating Range	°C (°F)	N/A	-3° to 345 (27 to 653)
Density @25°C	kg/m³	ASTM D4052	1005
Kin. Viscosity @40°C	mm²/s (cSt)	ASTM D445	29.6
Kin. Viscosity @100°C	mm²/s (cSt)	ASTM D445	3.80
Flashpoint PMC	°C (°F)	ASTM D93	170 (338)
Flashpoint COC	°C (°F)	ASTM D92	184 (363)
Coeefficient of thermal expansion	°C	NTR	0.000819/°C
Autoignition point	°C (°F)	ASTM E659	374 (705)
Pour point	°C (°F)	ISO3016	-32 (-25.6)
Neutralisation Nr (acid), TAN	Mg KOH/g	ASTM D664	<0.2
Maximum Bulk Temperature	°C (°F)	NTR	345 (653)
Maximum film temperature	°C (°F)	NTR	375 (707)
Boiling point at mbar	°C (°F)	NTR	359 (678)
Average molecular weight	NTR	NTR	252 (485.6)
Moisture content	PPM	ASTM E-203	150 ppm

Technical notes

Note: The data provided represents typical performance characteristics and does not constitute a binding specification. These values are subject to allowable production tolerances and may vary across batches. For detailed technical guidance, contact our expert team. Abbreviations: OC, open cup test; COC, Cleveland open cup test; and, NTR, no test reported.

Contact us for more information on high temperature synthetic heat transfer oils.

 

Scroll for more details

 

Streamline maintenance with Thermocare®

To complement the performance of the Globaltherm® range, the Thermocare® thermal fluid lifecycle maintenance program ensures your system operates efficiently and safely. With tailored packages like essential, optimum and ultimate, Thermocare® offers services ranging from live remote condition monitoring to comprehensive fluid maintenance for a fixed price.

This proactive approach reduces operational costs, enhances system safety and improves productivity through expert heat transfer fluid management.

Contact us for more information

Need advice on selecting the correct synthetic fluid for your heat transfer applications? For expert guidance on thermal fluid solutions and technical support, call us at +44 (0)1785 760555 or get a quote below.

Get A Quote Request MSDS

Application

A superior high performance energy efficient heat transfer fluid suitable for use in all kinds of industrial processes.

About Globaltherm® M

Made from highly refined base stocks, Globaltherm^® M thermal fluid has excellent thermal and oxidation stability allowing operation at high temperatures for extended periods.

The fluid also has efficient thermal conductivity and low viscosity, at the relevant operating temperatures, ensure high heat transfer rates requiring limited pumping energy.

Globaltherm^® M heat transfer fluid provides:

• low vapour pressures at elevated temperatures
• greatly reduced evaporation
• vapour lock and cavitation eliminating the need for high pressure piping and equipment

Used fluid may be disposed of through a number of environmentally acceptable methods such as used oil recycling or heavy fuels burning.

Scroll for more details

Parameter	Unit	Code (ASTM / ISO)	Result
Operating Range	°C (°F)	N/A	-10 to 320 (14 to 608)
Appearance	N/A	N/A	Viscous clear-yellow liquid with a mild odour.
Density @ 25°C	kg/m³	ASTM D4052	873
Kin. Viscosity 40°C	mm²/s (cSt)	ASTM D445	29.8
Kin. Viscosity 100°C	mm²/s (cSt)	ASTM D445	4.5
Flash Point PMC	°C	ASTM D93	210
Flash Point COC	°C	ASTM D92	230
Coefficient of Thermal Expansion	°C	NTR	0.00077/°C
Autoignition Point	°C	ASTM E659	360
Pour Point	°C	ISO 3016	-12
Neutralisation Nr (acid), TAN	mgKOH/g	ASTM D974	<0.05
Maximum Bulk Temperature	°C	NTR	320
Maximum Film Temperature	°C	NTR	340
Boiling Point at 1013 mbar	°C	NTR	365
Average Molecular Weight	NTR	NTR	400
Moisture Content	PPM	ASTM D6304	<100

Scroll for more details

Contact us for more information on high temperature thermal oils

We provide advice on how to choose the most appropriate oil for your heat transfer applications and provide our customers with continued technical support.

Call us on +44 (0)1785 760555 for more information

Application

Marlotherm^® SH is the ideal heat transfer fluid for a range of common applications, such as chemical and plastics processing.

Marlotherm^® SH high temperature heat transfer fluid is designed for use in closed loop, non-pressurised heat transfer systems. It delivers ultimate performance to ensure your system is running at maximum capacity and optimum efficiency.

 

Key facts about Marlotherm® SH

• Marlotherm® SH has an operating temperature range of -5° to 350°C (23°F to 662°F)
• Marlotherm®  SH HTF can be used without being pressurised
• Marlotherm® SH is non-corrosive
• It has a high flash point 200°C – one of the highest in its fluid class
• • It can be used in systems requiring start-up temperatures as low as -5°C (23°F) without the need for heat tracing

Scroll for more details

Parameter	Unit	Code (ASTM / ISO)	Result
Appearance visual	N/A	N/A	Liquid, clear
Chlorine	ppm	DIN 51408	<10
Acid number	mg KOH/g	DIN EN ISO 2114	≤0.02
Density @ 20°C		DIN 51757	1.04 - 1.05
Viscosity @ 20°C	cSt	DIN 51562	42 - 52

Scroll for more details

General product description	Unit	Code (ASTM / ISO / DIN)	Result
Boiling point at 1013 mbar	°C	ASTM D 1078	385 - 395
Pour point	°C	DIN ISO 3016	<-34
Flash point	°C	EN 22719	approx. 200
Autoignition temperature	°C	DIN 51794	approx. 500
Permissible heater outlet temperature	°C	NTR	350
Permissible heater film temperature	°C	NTR	380
Pumpability limit	°C	NTR	approx. -5

Scroll for more details

Choosing the correct heat transfer fluid

Thermal fluid specialist Global Heat Transfer stocks and delivers a wide range of premium quality heat transfer fluids, including Marlotherm^® SH. The company also provides the complete solution for global thermal fluid supply and management.

If you want advice on how to choose the optimal heat transfer fluid for your application, get in touch by calling +44 (0)1785 760 555. Find contact details for our other offices here.

Application

Globaltherm® NF is a non-fouling, non-toxic, high performance semi synthetic heat transfer fluid specially developed for use in food processing plants and industrial heat transfer.

About Globaltherm® NF

Made from severely hydro treated synthesised hydrocarbon base stocks, Globaltherm^® Non-Fouling has outstanding thermal and oxidation stability allowing operation at high temperatures for extended periods. It is non-hazardous, non-toxic, water white and odourless.

This heat transfer fluid has high flash/fire points and provides extra resistance to sludging.

Scroll for more details

Parameter	Unit	Code (ASTM / ISO)	Result
Operating Range	°C (°F)	N/A	-20 to 326 (-4 to 619)
Appearance	N/A	N/A	Colourless transparent liquid with no odour.
Density @ 25°C	Kg/m³	ASTM D4052	881
Kin. Viscosity 40°C	mm²/s (cSt)	ASTM D445	29.8
Kin. Viscosity 100°C	mm²/s (cSt)	ASTM D445	3.2
Flash Point PMC	°C	ASTM D93	210
Flash Point COC	°C	ASTM D92	216
Coefficient of Thermal Expansion	°C	NTR	0.00089/°C
Autoignition Point	°C	ASTM E659	350
Pour Point	°C	ISO 3016	-29
Neutralisation Nr (acid), TAN	mgKOH/g	ASTM D974	NTR
Maximum Bulk Temperature	°C	NTR	326
Maximum Film Temperature	°C	NTR	343
Boiling Point at 1013 mbar	°C	NTR	371
Average Molecular Weight	NTR	NTR	350
Moisture Content	PPM	ASTM D6304	<100

Scroll for more details

Contact us for more information on high temperature thermal oils

We provide advice on how to choose the most appropriate oil for your heat transfer applications and provide our customers with continued technical support.

Call us on +44 (0)1785 760555 for more information

Offshore platforms use liquid phase HTFs for heating facilities and regenerating glycols that are used to remove water from the natural gas produced. Refineries also use liquid phase heat transfer fluids to heat reboilers and columns for the distillation of oil and oil-based products.

Companies that reprocess and recycle used oils use thermal fluids in very high temperature distillation facilities, while pumping stations placed along oil pipelines use heat transfer systems to help control the viscosity of the oil moving through the line.

All oil and gas processing facilities have operating parameters specific to the application, to guide the selection of the most suitable heat transfer fluid. However, there are a few general parameters to keep in mind to select a fluid that delivers maximum efficiency for as long as possible.

The first thing to consider is thermal stability. All heat transfer oils can degrade over time, and the rate of degradation increases when the operational temperature exceeds that of the oil’s recommended use.

At high temperatures, the bonds between hydrocarbon chains start to break and produce carbon in a process called fouling. As the carbon concentration in the fluid increases, it deposits sludge into the pipes. This reduces the efficiency of the system and, if action is not taken, this sludge can obstruct the pipes and lead to serious safety hazards.

It’s important to choose a thermal fluid with a high thermal stability, which can resist high temperatures and occasional temperature peaks. This can slow down degradation and prevent the formation of sludge. It’s also important to choose a heat transfer fluid with a high flash point, the temperature at which a fluid produces enough vapour to be ignited. Over time, the molecules in a thermal fluid will break down in a process called thermal cracking, creating volatile light ends. These cause the flash point to drop, increasing the risk of fire.

In remote applications, such as offshore platforms, a fluid change can be very costly. At the same time, it’s essential that fire hazards must be avoided at all cost. For this reason, in these applications it’s essential to maintain the fluid’s normal operating conditions for as long as possible.

The Globaltherm® family of heat transfer fluids offers a broad range of products that are ideal for the oil and gas industry.

All extraction and processing plants using heat transfer fluids should operate using a proactive maintenance plan such as Global Heat Transfer’s Thermocare, which encompasses regular system analysis, fluid top-up and flashpoint and fouling management.

Additionally, the Heat transfer Fluid Sample Kit can be useful for offshore applications, which might be hard to reach for a maintenance engineer. The kit provides everything you need to draw a live, hot, circulating representative fluid sample in preparation for expert analysis, including labelled containers to return the fluid to our lab. After the analysis, a member of our technical team will contact you to discuss the results and advise you on the next steps. The Heat Transfer Sample Kit can be supplied as part of your Thermocare program.

Global Heat Transfer’s technical team has worked with engineers in the oil and gas industry for many years, specifying and supplying the correct heat transfer fluid and testing and analysing the product at regular intervals throughout the year. We provide on-site and telephone support for plant engineers to keep your system running safely and efficiently.