black iron corrosion?

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black iron corrosion?
Author: gmum (IL) Theres a 1" black iron gas pipe that is in contact with the steel support beam in my basement. Should that concern me in regards to corrosion? Are those dissimilar metals?
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Re: black iron corrosion?
Author: packy (MA) black iron gas pipe is steel. it should be the same as the steel beam. [extremehowto.com]
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Re: black iron corrosion?
Author: hj (AZ) And even if they were not, there would have to moisture where the meet to cause ANY corrosion.
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Re: black iron corrosion?
Author: gmum (IL) thanks. unrelated to my original question. I was wondering... What is service life to black iron gas pipes? The lines in my house are 60 years old. I upgraded the galvanized water lines some time ago. Do gas lines get replaced as well?
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Re: black iron corrosion?

Author: dlh (TX)

they will go bad eventually but how long that takes depends on many different things. usually good until they aren't....lol....seriously, i haven't ran into a gas line inside the house that needed replaced without there being a problem causing the need for replacement like not protecting it going through brick/concrete wall

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Re: black iron corrosion?
Author: gmum (IL) How do you know they gone bad? I assume surface rust is normal to an extent.
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Re: black iron corrosion?
Author: dlh (TX) that is the reason they put smelly stuff in natural gas - - - - - - - PLUMBERS "Protecting The Health Of The Nation"
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Re: black iron corrosion?
Author: gmum (IL) so your saying old joints just start leaking....
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Re: black iron corrosion?
Author: packy (MA) i don't know that you can put a life expectancy on black gas piping. it isn't indefinite but it sure is many decades.
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Re: black iron corrosion?
Author: hj (AZ) NO. you replaced the water lines because they had WATER running through them causing corrosion.
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