How to ensure the quality of the thermal oil furnace?

How to ensure the quality of the thermal oil furnace?

Are there any standards to ensure the quality of thermal oil furnaces when we purchase them?

1. The manufacturer must have a manufacturing license

The manufacturer of the thermal oil furnace must have a manufacturing license, and the manufacturer using the thermal oil furnace must also purchase thermal oil furnace products produced by qualified thermal oil furnace manufacturers.

2. Strength calculation and structural design of thermal oil furnace

All gas-phase furnaces are pressurized, while the liquid-phase furnaces of thermal oil electric heating furnaces are divided into pressurized injection type and non pressurized suction type. The components of organic heat carrier furnaces, whether under pressure or not, should be calculated according to the current boiler strength calculation standards, with a design pressure of working pressure plus 0.3 MPa and not less than 0.59 MPa. In addition to the design pressure, the calculation formula, parameter selection, and coefficient determination are all carried out in accordance with the corresponding standards of "Strength Calculation of Pressure Components of Water Tube Boilers" and "Strength Calculation of Pressure Components of Shell and Shell Boilers". The structural design of the electric heating heat transfer oil furnace and the mechanical performance test of product welds must meet the requirements of the "Safety Technical Supervision Regulations for Organic Heat Carrier Furnaces".

3. Pressure test

The thermal oil furnace undergoes pressure testing both after assembly by the manufacturing unit and after installation and repair by the user unit.

The pressure test of electric heating and heat transfer oil furnace is divided into water pressure test, hydraulic test, and air tightness test. Whether it is a gas furnace or a liquid furnace for electric heating and heat transfer oil furnace, a hydraulic pressure test must be conducted by the manufacturing unit, and only a hydraulic pressure test can be conducted by the using unit. It is not suitable to conduct a hydraulic pressure test. For gas furnaces with electric heating and heat transfer oil furnaces, both the manufacturing and using units need to conduct air tightness tests to check the sealing condition of non welded connection parts. The airtightness test method and requirements for electric heating and heat transfer oil furnaces shall be carried out in accordance with the relevant regulations for pressure vessels. For liquid furnaces of electric heating and heat transfer oil furnaces, no airtightness test is required.

The test pressure for the airtightness test of the electric heating heat transfer oil furnace is taken from the working pressure of the gas furnace; The hydrostatic test pressure is taken as 1.5 times the working pressure of the organic heat carrier furnace.

4. Strictly control the welding quality of electric heating and heat transfer oil furnaces

Due to the easy leakage and combustion of organic heat carriers in electric heating heat transfer oil furnaces, the welding requirements for organic heat carrier furnaces in electric heating heat transfer oil furnaces are higher than those for water medium boilers. The welding quality of electric heating heat transfer oil furnaces should be strictly controlled, and the welding requirements and non-destructive testing of electric heating heat transfer oil furnaces must meet the requirements of the "Safety Technical Supervision Regulations for Organic Heat Carrier Boilers".

5. The safety device of the electric heating and heat transfer oil furnace should be complete, sensitive, and reliable

The selection, installation, inspection, and maintenance of safety valves, liquid level gauges, pressure gauges, thermometers, sewage devices, expanders, automatic protection devices, etc. for electric heating and heat transfer oil furnaces must comply with the relevant provisions of the "Safety Technical Supervision Regulations for Organic Heat Carrier Furnaces".