[ maintenance service case ] BY939 special repair agent, heating network heater tubesheet repair case
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DeviceTitle：
[ maintenance service case ] BY939 special repair agent, heating network heater tubesheet repair case
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DeviceName：
Heating network heater tubesheet surface
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DeviceProblem：
The heat-supply network heater's tubesheet surface is affected by steam for a long time, which makes the welding place between tubesheet and tubesheet easy to cause corrosion and leakage.
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