Hefei Anru Electric Heating Materials Co., Ltd. independently develops and produces [self-regulating heating cables, explosion-proof heating cables, explosion-proof heating tapes, self-limiting high-temperature heating cables, self-limiting heating cables], which are widely used in pipelines and storage tanks of industrial enterprises such as petroleum, natural gas, construction, pharmaceuticals, food, chemicals, steel, and electric power for heat tracing, insulation, anti-condensation, freeze protection, underfloor heating, and gutter snow melting. These cables are suitable for general areas, explosion-hazardous areas, and corrosive areas.
Product Name: Self-Regulating Explosion-Proof Heating Cable
Product Model: ZWK-P  ZWK-F ZWK-PF
Product Use: Pipeline heating, auxiliary heat tracing
Product Description: Widely used for heat tracing, insulation, anti-condensation, and freeze protection in pipelines and storage tanks of industrial enterprises such as petroleum, chemicals, steel, and electric power. These cables are suitable for general areas, explosion-hazardous areas, and corrosive areas.
Heavy oil, paraffin, and high pour point in crude oil are all due to "poor physical properties." During extraction and production, when crude oil moves from the oil layer through the tubing and pipelines to the gathering and transportation pump station, heat loss causes the crude oil temperature to drop below the critical flow temperature. This leads to paraffin deposition, a sudden increase in viscosity, and a drop in flow pressure, making extraction difficult. "Thermal recovery" uses a heat source along the extraction and transportation process to exchange heat with the crude oil (heavy, paraffinic, pour point) via a carrier, compensating for heat loss, overcoming the above issues, and achieving smooth extraction.
I. Working Principle:
The self-regulating heating cable heating device adjusts its output power inversely along the pipeline direction according to the temperature gradient with well depth after being energized. It supplies heat to the inside of the tubing through the outer wall, maintaining a constant temperature along the line to reduce viscosity, resolve blockages, and increase pump efficiency. The core of the heating cable consists of three sets of PTC heating cores made of conductive polymer PTC functional material, processed via extrusion and radiation. Each point can inversely adjust its output power according to the temperature changes of the heated system, achieving automatic compensation, adjustment, and control.
II. Main Advantages:
Economy: Simple installation and a heating system designed for specific oil wells to achieve better efficiency. The system immediately affects crude oil production in the following ways:
a. Reduces paraffin blockage in tubing and frequent paraffin scraping, stabilizing production.
b. Increases temperature and reduces viscosity, decreasing flow resistance in the wellbore and improving pump efficiency.
c. Reduces the load on the pumping unit and extends the pump cycle.
Ease of Control: The heat output of the oil well heating cable can self-adjust as needed, minimizing operating costs. After temporary well shutdown, the tubing will not clog, allowing quick restoration of production capacity. Low-flow crude oil will not cause partial tubing blockage.
III. Technical Specifications:
1. Standard Colors: Brown, Red
2. Temperature Range: Maintenance temperature 105°C | Surface temperature 105°C±5°C | Withstand temperature 135°C
3. Thermal Stability: After 300 cycles between 10°C and 149°C, the cable’s heat output remains above 90%.
4. Bending Radius: 25.4 mm at 20°C room temperature; 35.0 mm at -30°C low temperature.
5. Insulation Resistance: For a 100m cable length at 75°C ambient temperature, tested with a 2,500 VDC megger for 1 minute, the insulation resistance is 3000 MΩ.

IV. Cable Structure:
1. Copper Core Conductor 2. Conductive Plastic Layer 3. Polyolefin Insulation Layer 4. Tinned Copper Wire Layer 5. Fluoroplastic SheathV. Operating Voltage: 24V, 36V, 110V, 220V, 380V

VI. Output Power at 10°C: 25W/m, 35W/m, 45W/m, 55W/m, 65W/m, 75W/m
VII. Explosion-Proof Marking: ExeⅡT4, ExdIIBT4
VIII. Explosion-Proof Certificate: CNEx05.1101X  CJEx07.124U  CNE×06.0205X
IX. Product Advantages:
1. Uniform heating pipeline temperature, no overheating, safe and reliable.
2. Energy saving.
3. Quick startup for intermittent operation.
4. Low installation and operating costs.
5. Easy installation and maintenance.
6. Convenient for automated management.
7. No environmental pollution.
8. Suitable for complex pipeline heating.
9. Suitable for instrument box freeze protection.
10. Suitable for heating pipelines far from the installation.