Apr. 29, 2024
Now let’s look at an example wherein a utility will install a mile of 8-inch pipeline in a subdivision, a constant pump rate is required due to an adjacent industrial park, and the materials being considered are Ductile iron pipe and PVC (Polyvinyl Chloride). In determining the energy costs to the utility of each respective material, the project model, as noted in the information below, has been established: Please note that the price per kWh will vary per region of the country. Areas with a higher $/kWh will experience higher overall energy savings.
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By going through the steps of first determining the respective head loss that must be overcome in each pipeline, then converting that into pumping costs the utility will incur based on the assumptions listed, one finds that using Ductile iron pipe will result in present worth cost savings to the utility of over $80,000 per mile during the 100-year estimated service life of the DI pipe.
Remember, these calculations are just for one mile of pipe. If a utility has two hundred miles of 8-inch pipe within its system, the savings over a 100-year service life jumps to approximately $16,000,000 over the same 100-year service life and assumptions listed above. The reason for this cost savings to the utility is that the 8-inch Ductile iron pipe (Class 350) has approximately 9.76% larger inside diameter compared to 8-inch PVC pipe (DR-14), and this larger area creates less head loss within the pipe.
Ductile Iron Pipe
Is a kind of pipe made from spherical graphite cast iron by centrifugal spinning process. The pipes, which can convey many fluid media such as water, oil and gas, are widely used in various pipeline projects for metallurgy, mine, water conservancy, petroleum and urban public service utility. Possessing high strength, good toughness as steel and better corrosion resistance than steel, the ductile iron pipe is the ideal substitute for gray cast iron pipe and common steel pipe. In addition, the DI pipes are produced with good straightness, even wall thickness, high dimension accuracy, smooth surface finishing and remarkable mechanical properties, plus with firmly sticking internal & external coating layer. Flexible Push-in joint and rubber gasket are used resulting in convenient installation of pipelines.
ITEM
VALUE
Product name
EN545 /ISO2531/EN598 Ductile Cast Iron Pipe
Model Number
K8, K9, K10, K11, K12, C20, C25, C30, C40,
Length
2000-6000
Standard
ISO2531 or BS EN545, ISO2531 or BS EN545
Shape
Round
Hardness
≤230HB
Pull Strength
>420MPa
Yield (≥ MPa)
300 MPa
Material
Cast Iron
Type
Seamless
Joint Type
Self-restrained Joint
Internal coating
Mortar Cement Lining
Surface treatment
Black bitumen liner/epoxy resin over coat layer
Size
DN80-DN1200
Application
water supply, drainage, natural gas and heat supply etc.
Quality Control
100% Inspection + Professional Lab Test
APPLICATION
1. Municipal Engineering: Buried drainage and sewage pipes.
2. Road works : Raiway and highway drainage pipes.
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3. Agricultural Engineering: Farmland, orchard, irrigation and drainage.
4. Mine: Mine ventilation air supply, drainage, mud pipe.
5. Communication: Communication cable protection pipe.
Standard export waterproof package, suit for all kinds of transport
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