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steam radiator bags loudly when heating and cooling
We have a 100 year old home with a dozen one pipe steam radiators of varying sizes, and all but one have no problems. One radiator bangs very loudly at least once or more when it is heating up, and often once when cooling down (as much as 10 minutes or more after the boiler has shut down). The radiator is pitched sufficiently back toward the inlet valve, so flow of condensate does not seem to be an issue. The radiator heats completely and in the same amount of time as other radiators in the house, so there does not seem to be any problem with air venting and steam getting into the radiator. The radiator has 9 sections interconnected along the bottom. It is 37-1/2 inches high, 21 inches long and about 8 inches across (several of our radiators are the same size as this). The fact that it bangs loudly both when heating up and cooling down suggests to me that it is caused by expansion and contraction of metal against metal inside the radiator where the sections interconnect along the bottom.
Can anything be done to correct this?