Cast Iron Failure

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Sub9 Participant Join Date: Dec 2013 Posts: 1	Cast Iron Failure 12/02/2013 11:44 PM
	Has anyone ever seen a cast iron failure where the failure occurred right along mating of the cope and drag. The failure that I am looking at is a cast iron tee from a wet sprinkler system in a new (under 3 month old) building. This happened in the summer so freezing was not an issue.
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#1 Re: Cast iron failure 12/03/2013 12:04 AM
	Bath breaking thread redux? __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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IdeaSmith Guru Join Date: Mar 2012 Location: Out of your mind! Not in sight! Posts: 4424 Good Answers: 108	#2 In reply to #1 Re: Cast iron failure 12/03/2013 12:17 AM
	Can't remember all of the old thread but was a Waterhammer used to break it up in the end? __________________ Common Sense Dictates
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IdeaSmith Guru Join Date: Mar 2012 Location: Out of your mind! Not in sight! Posts: 4424 Good Answers: 108	#3 Re: Cast iron failure 12/03/2013 12:19 AM
	Why would you wait for a winter to have such a part fail? Poor quality of the casting seems more than plausible. Are you after an insurence claim? __________________ Common Sense Dictates
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#4 Re: Cast iron failure 12/03/2013 12:28 AM
	It happens.... __________________ All living things seek to control their own destiny....this is the purpose of life
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Fredski Guru Join Date: Feb 2011 Posts: 7025 Good Answers: 207	#5 Re: Cast Iron Failure 12/03/2013 5:55 PM
	this is a drain?
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Eleven Active Contributor Join Date: Nov 2013 Posts: 16 Good Answers: 1	#6 In reply to #5 Re: Cast Iron Failure 12/04/2013 3:19 AM
	Sounds more like it was overstressed by forces on the branch line, or impact, either during assembly or installation. Cast iron is a cheap and poor substitute for Galvanised wrought Iron.
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Spinco Guru Join Date: Sep 2008 Posts: 706 Good Answers: 32	#7 Re: Cast Iron Failure 12/04/2013 10:39 AM
	A failure at the parting line can be due to too strong or too hard a core being used and there not being sufficient collapsibility of the core material creating a "hot tear" or crack at the parting line. Also can be the result of the gating system being located at the parting line seam and creating localized hot spots resulting in sponge shrinkage at the gate locations. There is also the possibility of insufficient innoculation resulting in large sized grain structure and a weakness of the metal at that area especially if the gates are located in that area and a slower cooling rate results in that area having oversized grain structure and a brittle nature. Then any piping stresses will result in cracking of the part. __________________ Spinco
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Yar Active Contributor Join Date: Feb 2011 Posts: 11	#8 Re: Cast Iron Failure 12/04/2013 10:52 AM
	This does not look like a failure of the fitting if the photo is of the installation. Looks more like improper installation and/or even a code violation. This looks like the fire sprinkler main drain connected to either a sanitary waste stack or storm drain stack. My guess is the horizontal galvanized branch was bumped with a heavy piece of equipment like a fork lift. Hard to say without more detail. YAR
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Eleven (1); Fredski (1); IdeaSmith (2); SolarEagle (1); Spinco (1); Tornado (1); Yar (1)

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