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The main steam pipes and high-temperature reheat steam pipes of the newly built power plant boiler cannot be press-tested!

2017-03-15View Original

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For newly installed power plant boilers, neither the main steam pipes nor the high-temperature reheat steam pipes can be pressurized for testing; instead, 100% flaw detection is carried out. The reason is that it is not possible to install blind flanges at the turbine cylinders. So, for existing boilers, how are these pipes isolated during hydrostatic testing after major repairs?

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