Unlike cast iron, ductile iron does not break when it is bent, so it is more suited for high demand applications. Unfortunately, this book can't be printed from the OpenBook. It has been estimated that almost half of all new water mains installed in North America are ductile iron. Ductile iron is a strong and reliable material for pipes, fittings, and valves.

Low cost of raw materials and relative ease of production make cast iron the last cost engineering material. Corrosion Protection of Ductile Iron Pipe David H. Kroon, P.E. It is best in these cases to order the ductile iron piping specially made from the manufacturer with the primer, as opposed to a standard asphaltic coating system per AWWA standards, in that the latter greatly complicates surface preparation and finish coating of those pipelines (if the asphaltic is not the finish coating desired). Ductile iron is similar to gray cast iron in composition, however during casting of ductile iron the graphite nucleates as spherical particles as opposed to flake-like structures.

One drawback is price. General purpose butterfly valves constructed with cast or ductile iron bodies with various liner materials. P.E. Cast iron is mainly alloy of iron (Fe) which contains higher than 2 % of carbon (C) and more than 1 % of silicon (Si). Seawater is a complex electrolytic solution, which has contributed to the corrosion of ocean oilrigs, water trans- Ductile iron is typically more expensive than cast iron … JV081007 – Ductile Iron Marine Wafer Spring Assisted Dual Plate Check (Non-Return) Valve – NBR Seat A marine duty ductile iron, spring-loaded dual plate check valve with aluminium bronze flaps and NBR seats suitable for cold and hot water, seawater, fuel oil and other non-aggressive media. Ductile iron replaced gray cast iron as pipe material in the early 1970s. 71â A.M. Horton, â Special Protective Coatings and Linings for Ductile Iron Pipe,â pp. What lining is typically used for Ductile Iron pipe transporting seawater? Corrosion of Cast Irons. Our ductile iron pipes, fittings, valves and accessories are anti-ageing and have earned a first-class reputation for both leak tightness and pressure resistance. If you need to print pages from this book, we recommend downloading it as a PDF. JV52N – Ductile Iron Wafer Butterfly Valve, NBR Lined High-quality butterfly valve with an NBR liner, offering a long life with low maintenance. Double thickness cement mortar lining in accordance with ANSI/AWWA C104/A21.4, Section … Sheri Sampson Terry Vincenzo Corrpro Companies Inc. ABSTRACT The results of a two-year study of corrosion and corrosion protection characteristics of ductile iron pipe are presented. ductile cast irons (Si-Mo and Ni-Resist Alloys) in syn-thetic diesel and gasoline exhaust gases has also previ-ously been reported [14]. It also presents the general methods of construction that are used in installing Ductile Iron ball and socket pipe and the factors that must be considered in choosing the proper procedure for the project. Included are field and laboratory evaluations related to short term and long term Cast iron deterioration with time in various aqueous salt solutions has also been studied [15]. Dale Lindemuth. Cast iron is a standard term which is used for a large family of alloys of ferrous materials. This technical publication discusses the basic characteristics of the Ductile Iron ball and socket joint.



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