Metal Sheathed Mineral Insulated Steam Turbine Bolt Electric Heater is designed and manufactured based on the mineral insulated heating cable made of high-temperature resistance alloy wire conductor, stainless steel tube as protective sheath insulated with high purity magnesium oxide cylinders, which is formed after compression process to ensure the use of electric heating element.

There are three kinds of protective sheath: straight type, semi-soft type and full soft type.

Steam turbine bolt electric heater is specially produced based on advanced technology, specializing in heating for hollow bolts of steam turbine or large machinery during the installation and maintenance, to meet the requirements of fastening and disassembly.

Properties

1. The electric heating rod uses the mineral insulation (MI) heating cable developed by MICH as the heating element.

2. The electric heating rod has a solid structure, high flexural strength, compactness, sealing and explosion-proof, and meets the requirements for heating and heat tracing of various types of storage tanks for petroleum and its products with an explosion-proof grade dIIB T1~T6.

3. The electric heating rod heats uniformly, low surface heat load, reliable operation and long service life, no reactive power loss, high thermal efficiency, easy operation and maintenance and no daily maintenance required.

4. The electric heating rod has good corrosion resistance to crude oil and its finished products.

Specifications, models and working environment requirements

Model and specification sheet

Table 1 Model and Specification of Straight Tank Electric Heating Rod

Table 2 Model and Specification of Right Angle Tank Electric Heating Rod

Note: The specifications above are regular ones with other specifications customizable according to user’s requirements, and the installation nipple joint is suppliable with the product.

3. Working environment requirements:

3.1 Ambient temperature: -30 ° C ~ +40 ° C

3.2 Voltage fluctuations are: -10% to +5%

3.3 Altitude: not required

3.4 Relative humidity of the environment: less than 95%

4, working principle and structure

1. working principle

The electric heating rod adopts a mineral insulated (MI) heating cable as heating element. The inner cavity of the rod can rapidly conduct heat that are fully transmitted to the rod body and released to the medium through the outer surface of the rod, and the electric energy is all converted into heat energy with a high heat transfer efficiency.

Figure 1: Schematic diagram of Straight Tank Electric Heating Rod Structure

1 Rod Casing 2 Core Tube 3 Mineral Insulated Heating Cable 4. Over-temperature Protective Sensor 5. Junction Box 6. Installation Nipple Joint

Figure 2: Schematic diagram of DRB--L (right angle) electric heating rod

1 Mineral Insulated Heating Cable 2 Outer Casing 3 Core Tube 4 Over Temperature Protection Sensor 5 Junction Box

Note: DRB--L type is a special structure of DRB type electric heating rod, which is specially designed for small oil tanks already in use. It can be installed in tank man hole without cleaning the inside or re-opening a new hole. The heating part is in the lower horizontal section while the vertical part is only the lead-out line section. The joint flange is arranged at the upper end of the vertical section, and the electrical wiring can be adjusted in a suitable direction and position.

Pasia Industries is a scientific and technological enterprise specializing in researching, developing, producing, installing and providing technical consultation and service for mineral insulated heating cables, heating elements and finished heaters as well as welded honeycomb products for filtering, shielding, sealing and guiding. Located in Puyuan high-tech park, Zhejiang province, it covers an area of more than 10 hectares, with a construction area of more than 50,000 square meters. It possesses a convenient transportation, about 150 kilometers from Shanghai in the north and 40 minutes from Hangzhou Xiaoshan international airport in the south.

With the most professional production lines and the highest automation level in China, Pasia produces mineral insulated heating cables, heating elements and finished heaters, honeycomb cores of stainless steel, brass, nickel, aluminium and other metal or metal alloys according to international standards. Pasia is one of the top four professional manufacturers of industry in the world on capacity and sales. As leading technological products, they possesses advanced properties of good quality, many varieties, full specification range, wide application, long service life, good safety and easy maintenance etc., and have been successfully applied to oil and gas (extraction, transportation, storage, etc.), chemical industry （petrochemical industry, fine chemical, pharmaceutical, etc.), power (nuclear power, solar power, etc.), construction (melting ice and snow), railway, aviation, metallurgy, electronic and et al for the applications as heat tracing and heating, detecting, signaling, power transmission, as well filtering, shielding, guiding and sealing. The company has become one manufacturer of the few in the world of completely electric heating technology and products of four categories including constant wattage, temperature self-regulating, MI heating cable and skin effect resistance and one of the top three wire electric heating products suppliers. The honeycomb core has been widely used by many clients on filtering, water treatment, structure platform with high requirement on flatness, shielding, turbine sealing and straightening etc. It can not only provide complete categories of professional products, also provides customers with solutions, consulting, project reply, EPC project general contracting services which can even be extended to the services including safe operation for maintenance etc. So far, the company has possessed 25 related patented technologies, 13 national new products, and 12 national technological innovation projects.

Upholding a company spirit of leading innovation and win-win cooperation, Pasia has become one of the few in the industry who possesses complete capacity of research and development, design, production and installation of mineral insulated heating cable and its heating equipment, honeycomb core and its parts or modules both home and abroad, relying on professional team, advanced management means, close work with related universities, design institutes and scientific research units, industry leading R&D testing capacity, under the ISO9001 quality system. After several years’ hard and persistent efforts, Pasia have the ability to supply a complete set of products, excellent technical support and perfect follow-up service. A variety of products have not only been applied to meet the requirements from domestic market, but also exported to many countries and regions such as Europe, Asia, Africa and America to serve different categories of purposes. It receives a high visibility and reputation from the industry. Over the past years, the company has involved in thousands of projects from all walks of life, among which the most influential ones are:the explosion-proof natural gas electric heater at Datong natural gas gate station in Shanxi province; Electric heater for paint material for the production bases of Hempel (USA) paint company in Kunshan and Guangzhou; Electric heaters for Tongyi chemical system in Beijing, Lanzhou, Shanghai and Shandong; Complete heating and tracing equipment for large oil and gas fields in Jiangsu oilfield, Benin, Angola, Thailand, Myanmar, Kazakhstan, the UK, Canada; the wind or water tunnels of honeycomb core in Singapore, India, USA and UK, shielding honeycomb core applications from many foreign countries, honeycomb seals for the turbines from Russia etc.

Insists on serving market with sincerity, securing quality with technology, leading innovation with study and driving development with passion, Pasia has become a well-known provider of advanced heating technology solutions at home and abroad, and one of the fastest growing members in the industry.