Ductile Iron vs Cast Iron
Ductile Iron vs Cast Iron
(OP)
I recently had a submittal come through where the contractor changed out 4" DIP to cast Iron. Was is the difference between the 2? Doesnt a cast iron pipe need to be coated due to a quicker corrosion period?
Thanks
Thanks





RE: Ductile Iron vs Cast Iron
Cast iron pipe is still used in some DWV applications, not in pressure applications.
What is your application?
RE: Ductile Iron vs Cast Iron
RE: Ductile Iron vs Cast Iron
RE: Ductile Iron vs Cast Iron
RE: Ductile Iron vs Cast Iron
RE: Ductile Iron vs Cast Iron
RE: Ductile Iron vs Cast Iron
RE: Ductile Iron vs Cast Iron
RE: Ductile Iron vs Cast Iron
RE: Ductile Iron vs Cast Iron
I would sit down with the contractor and discuss thoroughly why he wants to change the specs. You are using pipe in a strange situation - so he may have a good argument to use CI pipe. I am guessing money or ease of installation probably fits into the equation. (or he has a bunch of CI sitting in his storage yard he wants to get rid of). In this case, your client deserves a cut price.
99% of the time DI is superior material to use, and Cast Iron will probably not be manufactured .
RE: Ductile Iron vs Cast Iron
Do you really think future changes are easier with a weld then a simple bell and spigot connection?
RE: Ductile Iron vs Cast Iron
RE: Ductile Iron vs Cast Iron
http://www.charlottepipe.com/Default.aspx?Page=Cas...
Talk to a plumber about cast iron DWV systems if you want to know about hubless. Decades ago, DWV was joined with caulk and molten lead. Hubless fittings are a real time saver for plumbing of DWV systems.
http://www.henryplumbing.com/v5/faq/DWVsystems-Cas...
Welding ductile iron pipe is problematic. I have never witnessed this welding and I don't believe that it is a common practice.
http://www.ductile.org/magazine/2007_2/ductileweld...
RE: Ductile Iron vs Cast Iron
If you had a 10-Foot length of pipe and used only 4-Foot of it, what would you do with the other 6-Foot if there was no hubless joining method.
http://www.charlottepipe.com/Products/Assets/02A-C...
http://www.charlottepipe.com/Documents/CISPI_Tech_...