Fire Damage to Ductile Iron Pipe
Fire Damage to Ductile Iron Pipe
(OP)
Has anyone heard of delaminating of the cement lining on DI pipe as a result of fire damage?
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Fire Damage to Ductile Iron Pipe
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Fire Damage to Ductile Iron PipeFire Damage to Ductile Iron Pipe(OP)
Has anyone heard of delaminating of the cement lining on DI pipe as a result of fire damage?
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RE: Fire Damage to Ductile Iron Pipe
RE: Fire Damage to Ductile Iron Pipe
I believe virtually any substance or piping material can be affected with sufficient application of heat!
RE: Fire Damage to Ductile Iron Pipe
Ductile iron piping is FM listed only for underground fire services. Exposed ductile iron piping will not handle the pipe stress caused by the temperature difference in a fire. The gaskets will fail at 300 Degrees C. The fittings will fail because of the pipe stress caused by the temperature.
Ductile iron has a relatively low melting point of 2100 Deg F. Steel has a melting point of 2700 Deg F. A fire flashover occurs at about 1000 Deg F.
RE: Fire Damage to Ductile Iron Pipe
RE: Fire Damage to Ductile Iron Pipe
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Fire Damage to Ductile Iron Pipe
Ductile iron pipes, and gray cast iron pressure pipes furnished before them in the USA and up until the late 1970's, are in a sense literally born of heat and fire, and I guess I was somewhat surprised to see much singling out concern of heat on the piping material per se (after all, iron has long been a traditional material e.g used for wood-burning stoves and frying pans etc.!) While I have only been in the industry for 35 years, I was likewise also not aware that there was promotion at least in any recent era in the USA of cementlined ductile iron pipes specifically for "steam service" (though I guess I would also not necessarily surprised if it is being used somewhere). I am aware however that for many decades ductile iron has however been rather exclusively specified for some specific and otherwise potentially problematic scum etc. lines e.g. in wastewater treatment plants, that might be subject to "steam cleaning" (should that ever be necessary in the future to remove clogs), although I think instead of cement mortar lining many of these quite special lines have been and are specified with special glasslining, that reportedly has greater lubricity than any common plastics or polymeric linings, and adequately chosen temperature gaskets. Contrary it would appear to perhaps some inference of this thread, ductile iron is rather exclusively specified for such services, due to its proven performance and its tolerance for heat, to allow for the extremely high temperature firing of the glasslining on the inner pipe wall, and also effects of potential future steam cleaning.
I think Mr. Cornelius has made a good suggestion, i.e. to take look at the linings etc. by whatever means available and see what they actually look like after the event. If this is a water pipeline instead of pipe stacked in some sort of storage structure, perhaps it may also be possible/make sense to look at any other components as well, and maybe even run a new hydrostatic test at greater than working pressure to get a better feel also for present gasket/joint integrity. If all else is OK, perhaps any damaged gaskets might be readily replaced with some common joints of exposed ductile iron piping ?
Now, all this being said, if you choose to not coninue to utilize the piping for whatever reason, I suspect it might
well (unlike many other types of pipe, or other relics of fires) still bring top dollar from even your local scrap dealer.
RE: Fire Damage to Ductile Iron Pipe
This was referring to underground piping located adjacent to steam piping and experiencing the heat from adjacent steam piping.
Some additional reports and references:
http://n
http://www.dipra.org/pdf/cementMortarLinings.pdf
RE: Fire Damage to Ductile Iron Pipe
RE: Fire Damage to Ductile Iron Pipe
I am aware of the conservative service temperature document of DIPRA, but I was unable to open whatever the other document (as you say apparently some issue or concern of proximity of piping to hgih temperature steam lines?)is. Do you have another link (e.g. to html etc.), or could you at least provide the copy of the paper etc.? [I do understand some at least concern in general on the part of authorities, as I do remember a very problematic burst of a sizeable pvc waterline in proximity to a steam line in the Midwest several years ago.]
RE: Fire Damage to Ductile Iron Pipe
Condition Assessment of Ferrous Water
Transmission and Distribution Systems
STATE OF TECHNOLOGY REVIEW REPORT
EPA/600/R-09/055 | June 2009 | www.epa.gov/ord
Office of Research and Development
National Risk Management Research Laboratory - Water Supply and Water Resources Division
RE: Fire Damage to Ductile Iron Pipe
[I was able to go to site at link you provided, then readily access the paper with a keyword search -- I guess problem could be my caveman computer! In quick scan I could not find however a specific citation re steam, but will look in more detail when I get a chance.]