Longline Heating
Raychem/Tyco Thermals Controls longline systems are designed for freeze protection and temperature maintenance where circuit lengths require 500 or more feet of heating cable.
Mineral Insulated Heating Cables
Pyrotenax™ MI Cable-Alloy 825
Alloy 825 Mineral Insulated Heating Cables provide solutions for industrial freeze protection and process-temperature maintenance applications in hazardous and non-hazardous locations.
MI is also used where high power output, high exposure temperatures, or extreme resistance to environmental corrosives are needed. MI heating cables can provide up to 82 watts per foot (269 watts per meter) of power output with area classification and design approvals. MI heating cables are constructed and approved for use in non-hazardous and hazardous (classified) areas. The maximum application temperature for heating units is 1022°F (550°C), and the maximum exposure temperature for the heating cable is 1238°F (670°C). Higher temperatures are available by special order.
Self-Regulating Heating Cables
LBTV
The LBTV family of Raychem self-regulating heating cables provides freeze protection and low-temperature maintenance for longline applications. The LBTV heating cables maintain process temperatures up to 150°F (65°C) and can withstand intermittent exposure to temperatures up to 185°F (85°C).
The cables are configured for use in non-hazardous and hazardous (classified) locations, including areas where corrosives may be present. The LBTV heating cables provide long circuit length capability. They can be used for continuous circuit lengths up to 1125 feet powered from a single source. LBTV cables are especially well suited for tracing long
pipelines containing temperature-sensitive fluids or where high reliability is required.
SLBTV
The SLBTV family of Raychem self-regulating heating cables provides freeze protection and low-temperature maintenance for longline applications. The SLBTV heating cables maintain process temperatures up to 150°F (65°C) and can withstand intermittent exposure to temperatures up to 185°F (85°C).
The cables are configured for use in non-hazardous and hazardous (classified) locations, including areas where corrosives may be present. The SLBTV heating cables provide long circuit length capability. They can be used for continuous circuit lengths up to 2000 feet powered from a single source. SLBTV cables are especially well suited for tracing long pipelines containing temperature-sensitive fluids or where high reliability is required.VLBTV
The VLBTV family of Raychem self-regulating cable provides basic freeze protection and low-temperature maintenance for longline applications. The VLBTV heaters can withstand continuous exposure to temperatures up to 150°F (65°C), and are configured for use in hazardous (classified) locations, or in areas exposed to corrosives.
VLBTV provides very long circuit length capability. It can be used for continuous circuit lengths of 1000 to 12,000 feet, powered from a single source. VLBTV is especially well suited for tracing long pipelines containing temperature-sensitive fluids.VLKTV
The VLKTV family of Raychem self-regulating cable provides high-temperature maintenance for longline applications. VLKTV can also be used to provide low-temperature maintenance for longlines that are exposed to high temperatures. The VLKTV heater can withstand continuous exposure to temperatures up to 300°F (150°C), and intermittent exposure to 420°F (215°C).
The cables are configured for use in non-hazardous and hazardous (classified) locations, including areas where corrosives may be present. VLKTV2-CT provides very long circuit length capability. It can be used for continuous circuit lengths of 1000 to 6000 feet, powered from a single source. VLKTV is especially well suited for tracing long pipelines containing temperature-sensitive fluids or where extreme heater reliability is required.
Series-Resistance Heating Cables
Raychem® SC
SC and SC/H cables provide electrical freeze protection and high temperature maintenance for long pipelines in both non-hazardous and hazardous (classified) locations or and in areas exposed to corrosives or aqueous organic chemicals. SC and SC/H technology provide basic freeze protection and high-temperature maintenance for longline applications. This series-resistance type heating cable can withstand continuous exposure to temperatures up to 482°F (250°C). SC/F technology is designed for low heat loss, freeze-protection applications only. All SC heating cables can be used for continuous circuit lengths of 1000 up to 12,000 feet, powered from a single source.
Skin Effect Systems
Tracer™ STS
The STS (skin-effect tracing) system is ideally suited for long transfer pipelines up to 12 miles (20 km) per circuit. The system is engineered for the specific application. In the STS heating system, heat is generated on the inner surface of a ferromagnetic heat tube that is thermally coupled to the pipe to be heat traced. An electrically insulated, temperature-resistant conductor is installed inside the heat tube and connected to the tube at the far end. The tube and conductor are connected to an AC voltage source in a series connection. This method of heating is called skin-effect heating because the return path of the circuit current is pulled to the inner surface (approximately 1 mm) of the heat tube by both the skin effect and the proximity effect between the heat tube and the conductor.
A Tyco Thermal Controls skin-effect tracing system minimizes the number of power supply points required by offering the longest circuit lengths available to the industry.