Installation and construction precautions
1, determine whether the electric heating system must be double insulation, whether it requires multiple laying or winding.
2. The laying of the electric heating cable shall be at the lower side of the pipe, at the 5 and 7 o'clock positions of the needle, and shall be installed closely to the pipe.
3, electric heat tracing parts must be firmly installed, if necessary, to do a fixed bracket.
4. Before the electric heat tracing of the tank body, it is necessary to determine the length, spacing and position of the electric heat tracing winding according to the design requirements.
5, for flanges, valves, brackets and other heat-dissipating parts, must be wrapped in accordance with the requirements of the electric heating cable, and pay attention to make it easy to release when overhaul.
6. For the thermostat, it needs to be installed in the area and location specified by the design. The temperature probe and capillary of the temperature sensor of the pipeline cannot collide with the electric heating cable and the fixed aluminum tape, and the electricity in the pipeline and equipment Heater wires must be uniformly routed according to requirements. Valves, brackets, etc. that are easy to dissipate on the pipe should be wound according to the specific size and be determined according to requirements. The position of the temperature probe should be reasonably determined. It is generally more than 1 meter away from the heat-dissipating component to ensure accurate temperature measurement. For the anti-freeze electric heating system, the temperature-sensing thermostat needs to be installed in the coldest outdoor location.
7. The electric heating circuit directly controlled by the thermostat shall not exceed 22 amps of the control current, otherwise it shall be controlled by a contactor.
8. For each over-current switch that controls the electric heat tracing circuit, it must be equipped with 30 mA leakage protection according to international standards.
9. It must be ensured that the material, dimensions and installation of the waterproof layer outside the insulation layer meet the design requirements and there is no water seepage.
10. Parts of the electric heat tracing system must use accessories approved by Xinrui Company.
11. In the case of installation, fire, electricity, etc. must be approved by the party concerned and fire prevention measures must be taken.
12. For the installation of heat-shrinkable sleeve joints, care should be taken not to overheat the heating and ensure that the heat shrink seal. 13. For the entire electric heat tracing system, it must be ensured that the wiring is correct and the grounding is good.
14, for the same size of the pipe, because the design of the heat to maintain the temperature, insulation conditions, media, the environment is not the same, the required electric heating installation methods and models will be different, so must be strictly in accordance with the design requirements for installation.
15. Because the actual installation situation is different from the design considerations, the installation can be coordinated with the relevant parties to make adjustments that do not affect the electrical heating design requirements.
16, when the installation of the pipeline map and the installation of the system diagram and other technical information contradictory, such as: whether the need for electric heating, its heating requirements, installation demarcation point, electric heating model and the size of the pipeline does not meet the total electric heating installation Claim. You must contact the party concerned. Confirm the correct installation method. The general situation shall be based on the installation system diagram, the general electric heat tracing installation requirements or the electric heating system installation scheme, that is, the latest technical data.
17. During the installation process, pay attention to the product protection of the various components of the electric heat tracing system, and remind the relevant party concerned about the product protection of the electric heat tracing system and do a good job of checking and accepting the mutual sound quality evaluation standards.
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