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Safety heat exchanger
Type VEV-DR/VEV-L-DR (natural gas preheater, natural gas heat exchanger)
Safety heat exchangers are used in numerous industries, including the chemical, pharmaceutical and food industries as well as shipbuilding and power generation.
They are used wherever there are stringent requirements for product purity in process technology, where an environmental risk due to possible contamination of cooling or process water must be avoided or where mixing of the media could cause damage to machines and systems.
This is ensured by a double pipe system with a monitored safety chamber. In the event of a pipe defect, the medium enters this space, which detects leaks at an early stage and prevents unwanted mixing of media.
They are used wherever there are stringent requirements for product purity in process technology, where an environmental risk due to possible contamination of cooling or process water must be avoided or where mixing of the media could cause damage to machines and systems.
This is ensured by a double pipe system with a monitored safety chamber. In the event of a pipe defect, the medium enters this space, which detects leaks at an early stage and prevents unwanted mixing of media.
Performance features
- Optimum load case design
- flow-optimized design
- vibration-optimized design
E-1000 Thielmann Energietechnik GmbH
Options
- Customized design for other regulations (ASME, EN 13445, SVTI, AS1210, PD5500 etc.)
- Design according to TEMA
- Customer-specific approvals
- Customer-specific tests
- Application for sour gas (NACE)
- Design for low temperatures down to -50 °C
- Design pressure up to 300 bar
- Customized nozzle arrangement
General information
VEV/VEV-L heat exchangers (heat exchangers) heat gas for a subsequent system requirement or to counteract the Joule-Thomson effect. To increase the safety aspect during operation, safety double-tube heat exchangers of the type VEV-DR /VEV-L-DR are often used. With the "VEV-DR /VEV-L-DR", double-walled tubes and a safety chamber with leakage monitoring guarantee system safety and thus increase system efficiency, as unplanned downtime can be avoided.
The design is a welded steel construction in horizontal or vertical design.
The design is a welded steel construction in horizontal or vertical design.
Function
Unlike normal VEV/VEV-L shell-and-tube heat exchangers in single-tube design, the tubes of a double-tube safety heat exchanger have a double tube wall consisting of an inner and an outer tube. In addition, there are two tube sheets on each side. If the inner tube is damaged, the sealing medium flows through the leakage channels between the double tubes into the leakage chamber between the two tube sheets and triggers an alarm in the leakage sensor due to a pressure difference. As the second pipe wall is undamaged, the two media remain separate. Contamination of the processes and the associated equipment is therefore prevented and the system operator can leave the heat exchanger in operation until the next maintenance. This avoids expensive, unplanned downtime.
E-1000 Thielmann Energietechnik GmbH
Quality management
- DIN EN ISO 9001 certified manufacturer
- Our appliances are tested in accordance with AD 2000 regulations and CE-certified in accordance with EC/PED 2014/68/EU. Testing is carried out by approved experts (TÜV, Lloyd's Register etc.).
- Test and material certificates are issued by the experts in accordance with the design regulations.
Accessories
on request
- Water SAV safety shut-off valve (water jacket pressure-resistant)
- Water SBV safety blow-off valve (water jacket not pressure-resistant)
- Rupture disk, water side (water jacket not pressure-resistant)
Your contact persons
Distribution / Sales
Medium
Safety heat exchangers are essential components in industrial processes where reliable heat exchange of gaseous or liquid media is required. They ensure the safe and efficient transfer of thermal energy between different material flows and offer maximum operational safety - especially in sensitive areas of application.
The safety heat exchangers are designed for all gaseous and liquid media such as natural gas, biogas, hydrogen, process gas, LNG, nitrogen, air, water as well as glycol and glycol mixtures. These media are used in a wide range of industries, including chemicals, petrochemicals & polymer plants, natural gas production, the food industry, shipbuilding and maritime and industrial applications. Thanks to their robust design and high corrosion resistance, they are also suitable for special applications where maximum process reliability is required.
Depending on the process requirements, safety heat exchangers allow the media to be heated, superheated or cooled and thus contribute to the optimum control of thermal processes. Their special design prevents unintentional mixing of media and ensures maximum operational safety. Thanks to innovative technologies and high-quality materials, they offer a durable solution for demanding thermodynamic tasks in a wide range of industries.
The safety heat exchangers are designed for all gaseous and liquid media such as natural gas, biogas, hydrogen, process gas, LNG, nitrogen, air, water as well as glycol and glycol mixtures. These media are used in a wide range of industries, including chemicals, petrochemicals & polymer plants, natural gas production, the food industry, shipbuilding and maritime and industrial applications. Thanks to their robust design and high corrosion resistance, they are also suitable for special applications where maximum process reliability is required.
Depending on the process requirements, safety heat exchangers allow the media to be heated, superheated or cooled and thus contribute to the optimum control of thermal processes. Their special design prevents unintentional mixing of media and ensures maximum operational safety. Thanks to innovative technologies and high-quality materials, they offer a durable solution for demanding thermodynamic tasks in a wide range of industries.
Areas of application
1. chemical and petrochemical industry
2. oil and gas industry
3. power plants
Steam-water circuits: In power plants, they are used to recover heat from exhaust gases or to heat feed water.
Condensers for steam turbines: They condense the water vapor escaping from the turbine.
District heat transfer: In district heating networks, they ensure heat exchange between primary and secondary circuits.
4. food and beverage industry
5. marine and shipping industry
6. HVAC and air conditioning systems / district heating and cooling / refrigeration technology for distribution warehouses / distribution centers
7. metal and steel industry
- Reactor cooling: Shell and tube heat exchangers are used for temperature control in chemical processes to keep reactors at an optimum temperature.
- Heat recovery: Utilization of waste heat from chemical processes to preheat other process media.
- Distillation: They are used in distillation columns to condense vapors or to heat mixtures.
2. oil and gas industry
- Condensation of steam in refineries: In refineries, they condense water vapor or other process gases.
- Cooling of lubricating oils: RBWTs help to control the operating temperature of machines by cooling oils.
- Natural gas processing: Heat exchangers are used to heat or cool the gas before it is processed further.
3. power plants
Steam-water circuits: In power plants, they are used to recover heat from exhaust gases or to heat feed water.
Condensers for steam turbines: They condense the water vapor escaping from the turbine.
District heat transfer: In district heating networks, they ensure heat exchange between primary and secondary circuits.
4. food and beverage industry
- Pasteurization of milk and juices: Heating and cooling of liquids for preservation.
- Heating of process water: Use in breweries and dairies for temperature control.
- Cooling of production plants: shell and tube heat exchangers help to keep the operating temperature of machines stable.
5. marine and shipping industry
- Cooling of marine machinery: RBWTs are used to cool engines, generators and lubricants.
- Seawater cooling systems: Seawater is used as a cooling medium to regulate the operating temperature of equipment on ships.
6. HVAC and air conditioning systems / district heating and cooling / refrigeration technology for distribution warehouses / distribution centers
- Cooling and heating of buildings: They are used for heat recovery in ventilation systems or air conditioning systems.
- Industrial cooling systems: shell and tube heat exchangers help to operate large cooling circuits efficiently.
7. metal and steel industry
- Cooling of furnaces and rolling mills: RBWTs are used to efficiently dissipate process heat.
- Heating metal solutions: During electroplating or in chemical baths for temperature control.
Industries
Safety heat exchangers are essential components in thermal processes and are used in a wide range of industries. They enable safe and efficient heat exchange in systems where maximum operational safety is required. Thanks to their robust design and application-specific versions, they are particularly suitable for demanding industries in which thermal processes need to be reliably controlled.
Mechanical and plant engineering
In mechanical and plant engineering, safety heat exchangers play a central role in temperature control in a wide variety of systems. They ensure the precise heating, cooling or overheating of operating media and make a significant contribution to the efficiency and durability of machines and production systems. Thanks to their high resistance to thermal and mechanical loads, they guarantee long-term operational reliability.
Chemical, petrochemical and polymer industry
Safety heat exchangers are indispensable in the chemical, petrochemical and polymer industries. They are used for the thermal treatment of process gases and liquids in order to control chemical reactions in a targeted manner. Aggressive media and high temperatures are often involved here, which is why safety heat exchangers are made from corrosion-resistant materials. In petrochemical plants, they also support the processing of crude oil and the manufacture of petrochemical products by efficiently controlling the temperature of process flows.
Natural gas extraction
Safety heat exchangers are used to control the temperature of gas flows in natural gas extraction and in the further processing and distribution of natural gas. As the processing of natural gas often takes place under extreme environmental conditions, the heat exchangers must be able to withstand high pressures and temperature fluctuations. They are used, for example, in the dehumidification and conditioning of natural gas to enable safe further processing.
Food industry
In the food industry, precise temperature control is essential for the quality and safety of products. Safety heat exchangers are used here for the heat treatment of liquids and process media, for example in pasteurization systems or for maintaining the temperature of raw materials. Hygiene standards are particularly high in this industry, which is why the heat exchangers are often made of food-grade, corrosion-resistant materials and meet strict cleanliness requirements.
Shipbuilding and maritime applications
Shipbuilding places high demands on the operational safety and efficiency of technical systems. Safety heat exchangers are used in maritime applications to ensure heat transfer in cooling and propulsion systems. They are used, for example, in engine cooling, in air conditioning systems or for waste heat recovery from ship propulsion systems. Their resistance to salt water and harsh environmental conditions is a decisive factor for a long service life.
Industrial applications and special applications
In industry, safety heat exchangers can be found in almost all areas where thermal energy needs to be transferred efficiently. They are used in heating and cooling systems, in production processes and in energy generation. Depending on the application, they are designed for high pressure and temperature ranges and are manufactured from special materials to meet the respective operating conditions.
There are also numerous special applications in which safety heat exchangers play a key role. These include, for example, applications in the semiconductor industry, pharmaceutical production or in high-temperature processes. Tailor-made solutions that meet the highest safety and performance requirements are needed here.
Process industry
In the process industry, safety heat exchangers are an integral part of many production systems. They enable precise temperature control and thus contribute to process stability and product quality. As the requirements in the process industry vary greatly depending on the sector, there are a large number of different heat exchanger types that are specially adapted to the respective operating conditions.
Mechanical and plant engineering
In mechanical and plant engineering, safety heat exchangers play a central role in temperature control in a wide variety of systems. They ensure the precise heating, cooling or overheating of operating media and make a significant contribution to the efficiency and durability of machines and production systems. Thanks to their high resistance to thermal and mechanical loads, they guarantee long-term operational reliability.
Chemical, petrochemical and polymer industry
Safety heat exchangers are indispensable in the chemical, petrochemical and polymer industries. They are used for the thermal treatment of process gases and liquids in order to control chemical reactions in a targeted manner. Aggressive media and high temperatures are often involved here, which is why safety heat exchangers are made from corrosion-resistant materials. In petrochemical plants, they also support the processing of crude oil and the manufacture of petrochemical products by efficiently controlling the temperature of process flows.
Natural gas extraction
Safety heat exchangers are used to control the temperature of gas flows in natural gas extraction and in the further processing and distribution of natural gas. As the processing of natural gas often takes place under extreme environmental conditions, the heat exchangers must be able to withstand high pressures and temperature fluctuations. They are used, for example, in the dehumidification and conditioning of natural gas to enable safe further processing.
Food industry
In the food industry, precise temperature control is essential for the quality and safety of products. Safety heat exchangers are used here for the heat treatment of liquids and process media, for example in pasteurization systems or for maintaining the temperature of raw materials. Hygiene standards are particularly high in this industry, which is why the heat exchangers are often made of food-grade, corrosion-resistant materials and meet strict cleanliness requirements.
Shipbuilding and maritime applications
Shipbuilding places high demands on the operational safety and efficiency of technical systems. Safety heat exchangers are used in maritime applications to ensure heat transfer in cooling and propulsion systems. They are used, for example, in engine cooling, in air conditioning systems or for waste heat recovery from ship propulsion systems. Their resistance to salt water and harsh environmental conditions is a decisive factor for a long service life.
Industrial applications and special applications
In industry, safety heat exchangers can be found in almost all areas where thermal energy needs to be transferred efficiently. They are used in heating and cooling systems, in production processes and in energy generation. Depending on the application, they are designed for high pressure and temperature ranges and are manufactured from special materials to meet the respective operating conditions.
There are also numerous special applications in which safety heat exchangers play a key role. These include, for example, applications in the semiconductor industry, pharmaceutical production or in high-temperature processes. Tailor-made solutions that meet the highest safety and performance requirements are needed here.
Process industry
In the process industry, safety heat exchangers are an integral part of many production systems. They enable precise temperature control and thus contribute to process stability and product quality. As the requirements in the process industry vary greatly depending on the sector, there are a large number of different heat exchanger types that are specially adapted to the respective operating conditions.
General conditions
Safety heat exchangers must meet the highest technical requirements and function reliably in a wide range of industrial applications. Specific regulations, approvals, tests and design and operational parameters play a key role in this. In order to meet the individual requirements of different industries and markets, the design is customer-specific and takes into account all relevant norms and standards.
Standards and international regulations
Safety heat exchangers must meet the requirements of various national and international regulations. Depending on the area of application and market requirements, the following standards may apply:
These regulations ensure that the safety heat exchangers meet the highest safety and quality requirements and can be used in various industries worldwide.
Customer-specific approvals and tests
Many industries require individual acceptance and testing by independent testing organizations or companies with special requirements. Safety heat exchangers can be manufactured and tested according to the specifications of renowned customers and institutions, including
These tests ensure that the heat exchangers work reliably even under the most demanding operating conditions and meet the highest safety requirements.
Use in special operating environments
Safety heat exchangers often have to withstand extreme conditions. For this reason, the design and choice of materials are individually tailored to the specific operating requirements:
High pressure and temperature ranges:
Customized design and connection configuration
Depending on the application, safety heat exchangers can be manufactured with a customized connection arrangement. This enables flexible integration into existing systems and ensures optimum adaptation to specific process requirements.
Standards and international regulations
Safety heat exchangers must meet the requirements of various national and international regulations. Depending on the area of application and market requirements, the following standards may apply:
- ASME (with or without U-Stamp) for the international market, especially for the USA and North America
- EN 13445 for the European region, as the relevant standard for unfired pressure vessels
- SVTI for Switzerland, with special requirements for pressure equipment and safety devices
- AS 1210 for Australia, as a standard for pressure vessels in the industrial sector
- PD 5500 for the British market with special calculation and design specifications
These regulations ensure that the safety heat exchangers meet the highest safety and quality requirements and can be used in various industries worldwide.
Customer-specific approvals and tests
Many industries require individual acceptance and testing by independent testing organizations or companies with special requirements. Safety heat exchangers can be manufactured and tested according to the specifications of renowned customers and institutions, including
- BASF, OGE, Gascade, Sasol, INGL, ERI, Dolphin, Saudi Aramco, Gasco, MAN, Jenbacher, MAPNA, Siemens, DONG, TEMA and many more.
These tests ensure that the heat exchangers work reliably even under the most demanding operating conditions and meet the highest safety requirements.
Use in special operating environments
Safety heat exchangers often have to withstand extreme conditions. For this reason, the design and choice of materials are individually tailored to the specific operating requirements:
- Sour gas applications (NACE): Heat exchangers operating in environments with hydrogen sulphide (H₂S) must meet special requirements of NACE standards to prevent corrosion damage and material failure.
- Low temperature applications: Designed for low operating temperatures down to -50 °C, for example for processing liquefied gases such as LNG or cryogenic applications.
High pressure and temperature ranges:
- Design pressure up to 300 bar, ideal for high-pressure applications in the process and gas industry.
- Design temperature up to 250 °C to ensure efficient heat transfer even at high process temperatures.
Customized design and connection configuration
Depending on the application, safety heat exchangers can be manufactured with a customized connection arrangement. This enables flexible integration into existing systems and ensures optimum adaptation to specific process requirements.
Materials
Safety heat exchangers can be manufactured from different materials to meet the specific requirements of the respective application. A wide variety of materials makes it possible to optimally adapt the heat exchangers to the operating conditions and ensure high resistance to mechanical, thermal and chemical influences.
Carbon steel is often used when high mechanical strength and pressure resistance are required. This material offers good thermal conductivity and is particularly economical to manufacture. It is particularly suitable for applications where high corrosion resistance is not required.
Stainless steel , on the other hand, is used in environments where aggressive media, moisture or high hygiene standards play a decisive role. It is characterized by excellent corrosion resistance and high temperature resistance, making it suitable for demanding industrial processes. Stainless steel also ensures a long service life for the heat exchanger and reduces the risk of deposits or material failure.
In some cases, safety heat exchangers are made from a combination of carbon steel and stainless steel. This combines the mechanical advantages of carbon steel with the corrosion resistance of stainless steel. These hybrid solutions offer an economical yet high-performance alternative by combining the structural stability of carbon steel with the resistance of stainless steel in wetted areas.
Choosing the right material is crucial for the operational reliability and service life of a safety heat exchanger. Depending on the requirements, materials are specifically selected to ensure optimum performance and resistance to thermal, chemical and mechanical stresses.
Carbon steel is often used when high mechanical strength and pressure resistance are required. This material offers good thermal conductivity and is particularly economical to manufacture. It is particularly suitable for applications where high corrosion resistance is not required.
Stainless steel , on the other hand, is used in environments where aggressive media, moisture or high hygiene standards play a decisive role. It is characterized by excellent corrosion resistance and high temperature resistance, making it suitable for demanding industrial processes. Stainless steel also ensures a long service life for the heat exchanger and reduces the risk of deposits or material failure.
In some cases, safety heat exchangers are made from a combination of carbon steel and stainless steel. This combines the mechanical advantages of carbon steel with the corrosion resistance of stainless steel. These hybrid solutions offer an economical yet high-performance alternative by combining the structural stability of carbon steel with the resistance of stainless steel in wetted areas.
Choosing the right material is crucial for the operational reliability and service life of a safety heat exchanger. Depending on the requirements, materials are specifically selected to ensure optimum performance and resistance to thermal, chemical and mechanical stresses.
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Björn Mannewitz
ppa. Sales / Distribution
Phone: +49-561-50785-32
ppa. Sales / Distribution
Phone: +49-561-50785-32
Werner Aschoff
Sales / Distribution
Phone: +49-561-50785-23
Sales / Distribution
Phone: +49-561-50785-23
Simon Hendrik Kreis
Sales / Distribution
Phone: +49-561-50785-31
Sales / Distribution
Phone: +49-561-50785-31
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Safety heat exchanger
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