The efficiency of your refinery is decreased by thousands of dollars for every single-degree temperature deviation. If a hot spot develops somewhere on your pipeline, it might ultimately lead to a catastrophic failure. Your offshore platform can deal with Arctic winds (around -20°C) one month, and desert heat (around 50°C) the following month — all of this occurs daily in the oil and gas business; it’s a reality that you deal with every day.
Tempsens has worked very closely with industrial temperature sensor manufacturers and their customers to create solutions for operations in petrochemical refineries that are suffering from identical issues.
Types of temperature sensors in the oil and gas industry
- Thermocouples: Two dissimilar metal wires generate voltage proportional to temperature and can withstand extreme temperatures ranging from -196°C to 1750°C in high-temperature oil and gas applications.
- RTD (Resistance Temperature Detector): Platinum wire sensor with ±0.1°C precision and predictable resistance fluctuations, perfect for custody transfer and crucial process control.
- Thermowell: A metal tube that protects sensors from process pressure and corrosive media while allowing for safe sensor replacement without shutdown.
- Temperature and pressure gauges: These are mechanical instruments that display temperature and pressure data on the same dial face, eliminating the need for several gauges on process equipment and pipes.
- Infrared Pyrometer: An infrared pyrometer is a non-contact thermal sensor useful for monitoring hot or cold surfaces remotely by measuring the thermal radiation emitted from the surfaces. Infrared pyrometers can also be useful for monitoring inaccessible places, such as rotating machinery and flares.
- Thermal Imaging System: A thermal imaging system is a high-quality IR camera that enables users to visualize all surface temperatures on an object and to identify any hot spots that need attention to allow for accurate predictive maintenance.
Considerations for Selecting Temperature Sensors
Choosing a temperature sensor that does not function properly can result in problems that exceed the initial purchase price difference; resulting in inaccurate information, unanticipated repair costs and increased risk to safety. The Tempsens team will assist in defining the basic selection criteria to help maximize the return on your temperature measurement investment by providing you with the best possible reliability.
1. Assess the measurement environment.
Sensor technology is determined by your operating temperature range—thermocouples for extreme heat above 1200°C, RTDs for precision up to 600°C, and infrared sensors for physical access risks.
2. Match the Sensor to the Process Material.
Crude oil, natural gas liquids, and corrosive gases all attack different types of materials. Tempsens recommends Hastelloy for resistance to H2S, 316SS for hydrocarbon environments, and Inconel for high-temperature oxidation in reforming units.
3. Take into account the target’s size and measurement distance.
Infrared sensors require proper spot size ratios, whereas contact sensors require a minimum insertion depth of 10x the thermowell diameter for accurate readings.
4. Evaluate ambient operating conditions.
Offshore seawater, desert sand, Arctic ice, and tropical humidity necessitate weatherproof housings with IP66/IP67 ratings and explosion-proof certifications for reliable operation.
5. Protect your lens by preventing moisture and dust from contaminating your optical surfaces.
The presence of dust and moisture on an optical surface causes the infrared sensor to lose accuracy. Use of air purge systems, water-cooled jackets, and contamination warning systems can help you maintain accurate measurements by dealing with extreme environmental conditions.
6. Ensure your best chance for accurate aiming.
Infrared transmitters that are mounted in fixed locations need to be aimed with laser sight alignment that is accurate and has adjustable mount brackets that can resist vibration and thermal expansion while being used in operation.
7. Ensure rapid response time for real-time monitoring.
Exposed junction thermocouples respond in milliseconds for safety systems, RTDs are slightly longer than thermocouples for stable processes, and infrared sensors provide immediate readings for crucial control loops.
The significance of accurate temperature measurements in oil and gas
Accurate temperature measurements impact all bottom line, safety factors and regulatory compliance. As an example, a 2°C error in a distillation column can result in thousands of dollars lost each day due to off-spec product and wasted energy. Also, inaccurate wellhead data can cause loss of custody transfer revenue and incorrect calculations for available space in a pipeline. Finally, the risk of not recognizing that reformer tube temperatures are too low is catastrophic for metal failure, while false high readings cause operators to lose trust in the system because they trigger unnecessary alarms and disrupt production.
Only Tempsens provides high precision temperature sensor systems with calibration certificates that are traceable to the National Standards. Our industrial temperature monitoring systems ensure that your oil temperature sensor and gas temperature sensor systems meet all the required standards. Additionally, Tempsens provides stable, calibrated temperature sensor monitoring systems, which minimize the need for recalibration and maximize uptime by eliminating mistakes that would create expensive problems as production continues.
Frequently Asked Question
Q1. What Role Do Sensors Play in the Oil and Gas Sector?
As far as safety systems are concerned, real-time process data is critical to regulatory compliance, optimisation of production and protection from failure to equipment failure in potentially hazardous environments found throughout the petroleum industry.
Q 2. What is the purpose of Pressure Sensors within Oil and Gas?
Pressure Sensors monitor the conditions of the wellhead, the condition of the integrity of the pipeline, the performance of the pump, the stages of the compressor, and the operation of the safety reliefs during the complete production process.
Q 3. How important are temperature sensors in the oil and gas industries?
Temperature Sensors play an important role in the control of thermal runaway reactions, maximize the efficiency of catalytic/heat exchanging processes, meet product specification requirements, prevent degradation of equipment due to overheating and promote safe working conditions.
