Tank farms are critical storage areas in oil, gas and petrochemical facilities. Large storage tanks, floating roof tanks, cable runs, pump stations and process areas may all create fire detection challenges.
Among these risks, the rim seal area of a floating roof tank is one of the most important locations to monitor. The rim seal is located around the edge of the floating roof, where fire risk may develop close to the tank perimeter. Because the protected area is long, exposed and continuous, a point-type detector may not be the most practical solution for this application.
For this reason, many tank farm projects use LHD cable, also known as linear heat detection cable, linear heat detector cable, heat sensing cable, LHS cable or line-type heat detector. It provides continuous fixed-temperature heat detection along the protected route.
LHD cable is a linear heat sensing cable designed to detect heat continuously along its installed length. Instead of monitoring only one point, the cable acts as a continuous heat detector along cable trays, tank rims, tunnels, conveyors, pump areas or other industrial risk zones.
ANWETECH Digital Linear Heat Detection Cable works on a fixed-temperature principle. When the cable is exposed to its rated alarm temperature, the sensing element changes state. The adapter unit then supervises the signal and transmits alarm information to the fire alarm control panel.
For tank farm and rim seal applications, this means the heat detection cable can be installed close to the risk area and provide direct thermal detection along the tank perimeter or protected cable route.
Tank farm environments are usually wide, outdoor, industrial and difficult to monitor with conventional point detection alone. LHD cable provides a practical solution because it can follow the actual hazard path.
For floating roof tank rim seals, the cable can be routed around the tank rim area to provide continuous perimeter heat detection. For cable runs and pump stations, the same type of technology can be installed along cable trays, process routes or critical equipment zones.
This makes LHD cable suitable for:
Floating roof tank rim seal fire detection
Tank farm cable run fire detection
Oil and gas storage areas
Petrochemical process areas
Pump stations
Pipeline tunnels
Utility corridors
Outdoor industrial fire detection
In a floating roof tank, the rim seal area requires a detection method that can cover the perimeter of the tank. LHD cable can be installed close to this area to provide continuous fixed-temperature detection.
The main advantage is that the cable follows the risk path directly. If abnormal heat develops at any point along the protected rim seal area, the linear heat detection system can detect the temperature rise and send an alarm signal through the interface module.
This makes LHD cable a suitable solution for rim seal fire detection because it provides:
Continuous detection around the tank perimeter
Direct heat sensing close to the hazard source
Simple cable route installation
Reliable fixed-temperature alarm response
Fire alarm system integration
Tank farm fire risk is not limited to the storage tank rim seal. Cable runs, pump stations, pipeline tunnels and process areas may also require continuous fire detection.
ANWETECH LHD cable can be applied in these areas to support a complete tank farm fire detection strategy. The cable can be routed along long and narrow areas where point detectors are difficult to install or where continuous protection is preferred.
Typical areas include:
Cable trays and cable runs
Pipeline tunnels
Pump stations
Process vessels
Tank farm utility routes
Electrical and control cable routes
Outdoor industrial equipment zones
A complete ANWETECH digital linear heat detection system normally includes three main components:
Linear Heat Sensing Cable
The sensing cable is installed along the protected route. It provides continuous fixed-temperature detection along its full installed length.
Adapter Unit / Interface Module
The adapter unit supervises the sensing cable status and transmits alarm or fault signals to the fire alarm control panel. It provides a practical connection between the LHD cable and the fire alarm system.
Termination Unit
The termination unit is installed at the end of the sensing loop. It provides end-of-line termination and completes the detection circuit.
This system structure makes ANWETECH LHD cable suitable for engineering projects where continuous detection, alarm supervision and fire alarm panel connection are required.
Tank farm applications are usually outdoor and industrial. Product selection should consider ambient temperature, UV exposure, corrosion risk, hazardous area requirements and the protected object.
ANWETECH LHD cable series includes different rated alarm temperature options, such as 68°C, 88°C, 105°C, 138°C and 180°C. The correct temperature rating should be selected according to the project environment and engineering design.
For outdoor tank farm applications, corrosion-resistant or outdoor cable construction may be considered. For hazardous or EMI-sensitive environments, the appropriate protected type and safety barrier arrangement should be selected according to project requirements and local regulations.
ANWETECH Digital Linear Heat Detection Cable can be connected to a fire alarm control panel through the adapter unit. The adapter unit monitors the cable and provides alarm and fault status supervision.
This allows the LHD cable system to become part of the overall fire alarm strategy for the tank farm. When heat is detected along the protected route, the fire alarm control system can receive the alarm signal and activate the required response according to the project design.
This may include alarm indication, remote monitoring, fire suppression system interface or other site-specific safety actions.
ANWETECH LHD cable provides a reliable solution for tank farm and rim seal fire detection because it is designed for continuous heat sensing in demanding industrial environments.
Main benefits include:
Continuous linear heat detection along the protected route
Suitable for floating roof tank rim seal areas
Applicable for cable runs, pump stations and pipeline tunnels
Fixed-temperature alarm response
Compatible with fire alarm control systems
Suitable for harsh or limited-access industrial areas
Multiple alarm temperature ratings available
Simple system structure with sensing cable, adapter unit and termination unit
