heating tape

Summary: This product "Heating Belt" is provided by a professional electric heating belt manufacturer. Zhongyi Electric Heating has rich experience in the installation and design of electric heating belts. The following is a product introduction of the "Heating Belt" model types: What is a heating belt? In depth analysis of the principle, we will provide you with detailed information on heating belts through pictures and text, providing a more comprehensive knowledge of heating belts than encyclopedias. Electric heating belt manufacturers can also provide you with heating belt prices. Let's take a look at heating belts together..

Zhongyi is a high-quality manufacturer of heating belts at different prices and models.

What is a heating strip? In depth analysis of the principle, we will provide you with detailed information on heating belts through pictures and text, providing a more comprehensive knowledge of heating belts than encyclopedias. Electric heating belt manufacturers can also provide you with heating belt prices. Let's take a look at heating belts together.

Heating belt, also known as electric heating belt, heating cable, etc. Mainly used for heating and insulation of storage tanks, pipes, tanks, and other containers in various industrial equipment. It is mainly composed of electric heating materials and insulation materials. The electric heating material is nickel chromium alloy strip, which generates heat quickly and has high thermal efficiency. Long lifespan and other characteristics, the insulation material is multi-layer alkali free glass fiber, which has good temperature resistance and reliable insulation performance. Heating belts are used for heating and insulation of storage tanks, pipes, tanks, and other containers in various industrial equipment. It is mainly composed of electric heating materials and insulation materials. The electric heating material is nickel chromium alloy strip, which generates heat quickly and has high thermal efficiency. Long lifespan and other characteristics, the insulation material is multi-layer alkali free glass fiber, which has good temperature resistance and reliable insulation performance. It has a soft structure that can be directly wrapped around the surface of the heating part during use. Uniform temperature, easy installation, convenient use, safe and reliable. The limitation of the heating belt is due to temperature and no load. The heating temperature of the silicone strip is about 200 degrees, and the temperature can only reach 250 degrees during use. This temperature limits the usage range of the tropics. Another limitation is that the thermal power is added. The power of the heating belt is generally not too high, which limits the tropical speed of the heating belt and makes it rarely used for heating flowing objects, as heat loss makes it unable to replenish in a short period of time.

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The disadvantage of heating belts is that the heating temperature and heat are added, and the tropical characteristic is the softness of the heating. Therefore, in some special cases, many heating methods cannot be replaced, and the same soft Fly can only be used as an electromagnetic device, which can be replaced by a heating mode. Compared with the tropical fly heating, the heating capacity and temperature of the electromagnetic heating exchanger itself can reach more than 600 degrees, and the heating rate is also more than 25% higher than that of the resistance heating block. Each electromagnetic heating capacity is equipped with an insulation layer, making it 30% -70% more energy-efficient than the general resistance heating. Preparation before installation: The anti rust and anti-corrosion coating should be dry, there should be no burrs or sharp corners on the pipeline, and the surface of the heating belt should not be damaged. The insulation resistance of the heating belt should be ≥ 20M Ω (1000VDC). Do not forcefully pull the electric belt and avoid placing the electric pedal or heavy objects on the electric belt; The model of the electric heating belt and all accessories should meet the design requirements. Attention should be paid during installation: The heating strip should be fixed on the drying tube with fiberglass pressure-sensitive tape or aluminum tape every 50cm. Usually, the electric heating belt is installed below the pipeline at a 45 degree angle; Reserve 1 meter of length on each side of the power point and the tail battery of the line; All radiators (such as brackets, valves, flanges, etc.) should retain a certain length of electric heating for easy disassembly, maintenance, replacement, etc. at any time. When using bidirectional or three-way connectors, each end of the heating strip should be kept 40 centimeters long. Multiple heating belts should pay attention to the reasonable selection of power points for easy maintenance. The insulation material must be dry and should be covered with a waterproof cover. The outer insulation layer should be labeled with a warning label indicating "electrically heated inside". Inspection and testing after installation: Check whether the surface of the heating belt is damaged. Use a 2500 VDC instrument to test one end of each independent circuit. The insulation resistance should be greater than 20M Ω. The power supply for overload protection, leakage protection, and explosion-proof safety devices should be ensured.

Special precautions: It is strictly prohibited to mix steam heating and electric tracing. When installing the heating strip, the insulation layer should not be damaged. It should be tightly attached to the heating element to improve thermal efficiency. If the heating element is non-metallic, use tape to increase the contact heat transfer area and fix it with nylon ties. It is strictly prohibited to tie it together with electrical wires. The medium on the flange is prone to leakage, so it should be avoided when wrapped around the heating belt. One end of the heating strip is connected to the power supply. It is strictly prohibited to short-circuit or contact the other end of the wire core with conductive materials. It must be cut into a "V" shape and sealed. Matching sealing head; Explosion proof junction boxes and terminals should be installed in waterproof and explosion-proof environments. After wiring, a silicone rubber sealing ring should be applied (the protective cover should be peeled off by 10cm to prevent short circuits). During installation, insulation with hot spots should be measured one by one, and the shielding layer must be grounded. When the insulation resistance is low at 20m Ω (1000VDC), bipolar power-off and leakage protection circuit breakers should be selected according to the voltage. The current parameters of each electric heating system. If steam cleaning pipelines require descaling, they should be cleaned before installing the electric heating belt. It is necessary to design and install an annual cleaning line based on special conditions. Self controlled electric heating long wires are specifically designed for anti freezing and insulation of long-distance pipelines. The maintenance temperature is 65 ° C. A single power cord can reach 3660 meters (7320 meters for bidirectional power). The heating strip is suitable for ordinary areas, hazardous areas, or corrosive areas. The self controlled electric heating long line is designed specifically for anti freezing and insulation of long-distance pipelines. It has a high maintenance temperature (up to 150 ° C) and can withstand it. Exposure temperature is 215 ℃ C) The length of a single power cord can reach 1830m, suitable for general areas, hazardous areas, and anti-corrosion areas.

Self controlled electric heating belt

The heating belt is composed of conductive polymer, two parallel metal wires, and an insulating sheath. Its characteristic is that the conductive polymer has a high positive temperature coefficient and is connected in parallel with each other. It can automatically adjust the output power according to the temperature changes of the heating system, automatically limit the heating temperature, and can be arbitrarily shortened or used within a certain range. And allow multiple overlaps without high temperature hotspots or burning out. As the heating power varies with the temperature of the entire heating belt, the heated semiconductor core exhibits variable temperature resistance, which resists high/low temperature changes in heating temperature. Self limiting heating belts have become a common type of heating belt. They can be widely used for the transportation of liquid objects in pipelines and for anti freezing insulation of tanks, maintaining process temperature, heating roads, ramps, pedestrian crossings, eaves, and floors. The self-adjusting heating belt has a heating semiconductor polymer material distributed between two conductive cores, and is composed of a polymer inner sheath, an alloy shielding mesh, and a polymer outer sheath on the outside. When current passes through, the cable resistance increases with the temperature of the heating strip. The result is that the output power of the electric heating belt decreases with the increase of temperature. As the heating power varies with the temperature of the entire heating belt, the heated semiconductor core exhibits variable temperature resistance, which resists high/low temperature changes in heating temperature. Even if overlapping, the self limiting heating belt will not overheat. No special design is required. The self limiting heating belt can cut the working length of the pipeline at any time to accurately match the actual laying length of the pipeline. It does not require special tools and is very easy to install.

Positive temperature coefficient diagram of heating belt

Classified by temperature: According to the composition of polymer PTC materials, self controlled heating belts are divided into two types: low temperature type and high temperature type. The commonly used heating belts in the market are 65 ° C heating belts based on polyolefins and 160 ° C and 150 ° C heating belts based on fluorine-containing materials. The temperature level here is defined as the ambient temperature that can be effectively applied to the heating belt (MAXIMUMIPE MAINTENANCE TEMPERARE). It can also be understood that the environmental stability of the cable can be applied for a long time, and the effective heating power output is temperature, which exceeds the temperature. On the one hand, due to the increase in resistance, the output power of the cable itself is very low, and the actual heating efficiency is very low. On the other hand, long-term use of Super xx7d0, such as PTC characteristics, will result in a decrease or attenuation of heating power, which will shorten the lifespan and operational reliability of the cable. However, it is also possible to be exposed to a temperature environment that exceeds the temperature for a short period of time. Therefore, in addition to the above temperature levels, the automatic control heating wire also has another temperature level. For cables rated at temperature at 65 ° C, the temperature is 85 ° C, for cables rated at 110 ° C, it is 130 ° C, and for cables rated at 150 ° C, it is 230 ° C. However, at this point, the effective output power of the cable is close to zero. Due to the limited number of relevant literature, many people mistakenly believe that the temperature of the self controlled heating belt is the surface temperature of the heating belt. Therefore, there are claims of polyolefin heating at temperatures of 45.65, 85, and 105 ° C.

In fact, since the output power of the cable is related to the ambient temperature, the surface temperature of the cable is closely related to the tested ambient temperature and maintains a warm state. Therefore, defining the surface as a temperature controlled heating zone is unscientific and inaccurate. It is important to remember that for polyolefin heating belts, the continuous use temperature should not exceed 65 ° C. According to the output power classification, the output power of the automatic control heating belt refers to the output power per unit length of the cable under the condition of an environment temperature of 10 degrees Celsius. According to the classification of heating power output, automatic temperature control heating has three types: high, medium, and low. Generally speaking, the heating power of low-power heating belts is less than 35 watts per meter; Medium power heating belts with heating power greater than 35 watts/meter and less than 70 watts/meter; And high-power heating, heating greater than 65 watts per meter. Cable.

According to the application site classification, # n universal heating cable refers to a heating cable composed of copper wire, polymer PTC material, and a single-layer flame-retardant sheath. It is mainly used for heating or warming up pipelines. Explosion proof enhanced heating cable: The outer layer of the universal cable is made of composite metal mesh. This type of cable structure can effectively eliminate static electricity and resist external mechanical encounters. Mainly used in places with explosion-proof requirements.

Anti corrosion and explosion-proof enhanced cable: This structural cable is a metal mesh outer layer of explosion-proof enhanced heating cable, combined with a layer of fluorine-containing material. A heating belt with this structure can effectively prevent and resist static electricity, mechanical collisions, and various corrosive media. Mainly used in places with harsh environments or flammable and explosive materials.

Heating strip used for pipeline antifreeze and insulation

Classification of cable usage

Ordinary heating belt: This is a dual core heating belt. Two parallel metal wires are coated with polymer PTC material and flame-retardant sheath material or metal mesh and fluorine material sheath on the outside. Due to the influence of the diameter of the conductor and the long voltage drop, the connection length of this cable usually does not exceed 200 meters.

Ultra long heating strip: This is a special structure of five or six core heating strip. In addition to the two parallel wires coated with polymer PTC material, 3-5 metal wires with insulating sheaths are also set in the same direction, and metal armor is added. Used for transmitting electrical energy. This special structure allows the cable to have a maximum continuous length of no more than 1100 meters, making it suitable for heat tracing in oil and gas transportation channels and underground oil fields.

Safety heating belt: This is a three core heating belt. Place monitor wires along the length of the flame-retardant sheath in the cable. The monitoring line can abnormally change the output power of the line, transmit information such as overcurrent status and local damage to the control room in a timely manner, facilitate timely understanding of the heating situation along the line, and ensure safe and reliable operation of the cable.

Classified by applicable voltage

Low voltage type: refers to heating belts with a suitable voltage range between 12-36V. This type of cable typically has low heating power and a continuous usage length of no more than 10 meters.

Please strictly follow the voltage requirements when using, otherwise it may cause accidents such as cable fire. The scope of application is mainly used for civilian health products and heated seats for vehicles and ships.

Medium voltage type: refers to a heating belt with a voltage between 100-660V. We usually refer to self regulating heating belts involving this type of cable. In practical applications, 120 and 250V cables are interchangeable, but the continuous length of 120V heating strip is usually half of 240V. The continuous application length of this cable usually does not exceed 200 meters.

High voltage cable: refers to a heating strip with a voltage between 380-650V. They are mainly the 5-6 core heating strips mentioned above. The continuous application length is usually greater than 500 meters.

The heating strip is a new generation of strip constant temperature electric heater. The resistivity of the heating element has a high positive temperature coefficient (PTC) and is connected in parallel with each other. Its characteristics are: it can automatically limit the temperature during the heating process and automatically adjust the output power and the temperature of the heating element without any additional equipment; It can be cut or used arbitrarily within a certain length range, and allows multiple overlaps without high temperature hotspots and burning problems. These characteristics make electric heat tracing have the advantages of preventing overheating, easy maintenance, and energy saving. Suitable for temperature control, heat tracing, insulation, and heating of pipelines, equipment, and containers, especially when materials are prone to decomposition, deterioration, crystallization, and freezing. It is widely used in industries such as petroleum, chemical, power, metallurgy, light industry, food, refrigeration, construction, gas, agricultural and sideline products production and processing.

Use of heating belts for pipeline routes

The electric heating belt is composed of nano conductive carbon particles and two parallel busbars with insulation layers. Due to this parallel structure, the electric heating strip can be cut into any length on site, using bidirectional or three-way connection junction boxes.

The number of circuits between busbars in each heating line varies with temperature. When the temperature around the heating belt cools down, the conductive plastic shrinks small molecules and connects carbon particles to form an electrical circuit. These circuits make the heating belt warm up.

When the temperature rises, the conductive plastic produces micro molecule expansion, and the carbon particles gradually separate, causing the circuit terminals and resistance to increase, and the heating belt automatically reduces power output.

When the temperature is low, the plastic returns to the state of small molecule shrinkage, the carbon particles connect to form an electrical circuit, and the heating power of the heating belt automatically increases.

The self limiting heating belt has advantages that other heating devices do not have. The temperature it controls will not be too high or too low because the temperature will automatically adjust.

Electric heating belts should not be subjected to strong pressure shocks during installation. It is easy to damage the material structure inside the belt. If the material inside the belt changes, it will not only seriously affect its work efficiency, but also easily cause disasters. Electric heating wires should not be folded, especially if the folded diameter is greater than six times the diameter of the belt. It is easy to cause significant changes in the structure of the belt, leading to unforeseeable disasters. Do not place any items that are prone to sparking near the heating belt. Some manufacturers have placed a large amount of welding materials around them, which can easily burn the surface insulation layer and cause unexpected trouble. The length limit and other requirements of the heating belt. Please read the requirements carefully when using to avoid disasters caused by low-level errors.

In daily use, due to the heating belt being placed in the air for a long time, it is easy to generate moisture and accumulate moisture. It is particularly important to check the work after using it for a period of time. Some places are difficult to detect and the skin is damaged, so careful investigation of human hands is necessary. This also requires caution from workers. Therefore, the heating belt should pay attention to some small places in daily life. For more questions or technical exchanges related to heating belts, you can consult the heating belt manufacturer for answers.