The Benefits of Using ductile iron pipe price per meter

Pipe Class

DI pipe can be ordered as either Pressure Class (rated as Class 150 – 350 psi) or Special Thickness Class (Class 50 – 56). The classification hinges on the pipe's thickness and weight.

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Pressure Class pipe has become the standard specification for ductile iron pipes in numerous regions. This type of pipe is thinner and utilizes less iron, thereby lowering costs. Moreover, its classifications align more closely with the pressure ratings found in some alternative materials. Despite being thinner, Pressure Class rated DI pipe can withstand the declared working pressure while providing all the advantages of ductile iron.

Conversely, some areas still prefer the robust, heavier classes, known as Thickness Class. Particular job requirements such as the depth of cover, trench type, soil conditions, and certain applications like flanged pipe, dictate the best-suited pipe class. For example, the minimum wall thickness for flange fabrication is Thickness Class 53.

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Consider a scenario where a utility is installing a mile of 8-inch pipeline in a subdivision. A constant pump rate is necessary due to an adjacent industrial park. The materials considered are Ductile iron pipe and PVC (Polyvinyl Chloride). Based on the project's parameters, the energy costs of each material are examined. Note that the price per kWh can vary across different regions.

• 8-inch DI pipe vs. 8-inch PVC pipe
• Pipeline Length: 5,280 ft.
• C Factor: 140
• Flow Rate: 695 GPM (Tech Park Demand)
• Unit Power Cost: 0.06 $/kWh (Adjust per region)
• Pump Rate: 24 hr/day
• Pump Efficiency: 70%
• Design Life: 100 years
• Rate of Return: 5%
• Inflation Rate: 4%

By evaluating head loss in each pipeline and converting it to pumping costs, it is determined that Ductile iron pipe will result in cost savings of more than $80,000 per mile over its 100-year service life.

These calculations apply to just one mile of pipe. For utilities with 200 miles of 8-inch pipe, the savings over a 100-year lifespan could amount to approximately $16,000,000, using the same assumptions. The cost savings are attributed to the 8-inch Ductile iron pipe (Class 350) having roughly 9.76% larger inside diameter than the 8-inch PVC pipe (DR-14), leading to less head loss.

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