Ductile iron pipe (DIP) is one of the most widely used pipe materials in North America. The Design Life is second to no other pipe material due to its robust design. This pipe material is the strongest and most resilient available for water and wastewater utilities providing unparalleled Life-Cycle value.
In many areas, utilities need to consider how to protect these valuable pipelines from corrosive soils. The question is “How can we economically protect these pipelines to meet or exceed the 105-110 year average design life of DIP?”
Even in this modern era, we are still concerned with many of the issues that early civilizations faced when providing water to our communities, such as supply and demand, pipeline construction and upkeep, cleanliness, conservation and cost. In the fall of 2018, McWane Ductile’s Senior Regional Engineer, Roy Mundy, had the opportunity to interview Consolidated Utility District General Manager Bill Dunnill. The two gentlemen, both with utility management experience, had a candid conversation about Bill’s day-to-day challenges, successes and his preferred choice of pipeline material. The following are excerpts from their discussion.
Today there are several funding methods and sources for water and wastewater projects, not only in the United States but throughout the world. Most, if not all, require some sort of report or project summary. You may have seen these with such names as Conceptual Design or Engineering Report, Facilities Needs Assessment, Preliminary Design Report, Preliminary Engineering Report. Different agencies and different countries have different names for these respective documents, but most are like each other in scope and requirements.
When talking about ductile iron pipe in sewer applications, many times Induron’s Protecto 401™ comes to mind. Protecto 401 lining has often been the specified lining for ductile iron pipe in sewer applications more than 50 years.
Common uses for Protecto 401 are for a sewer force main that may not be fully running, where trapped air may exist, where chemical resistance is required, or for abrasion resistance. There may be occasions in the field when patching of the Protecto 401 lining may be necessary.
Picture This
Much time, effort, and care have gone into installing a water line. Crews have worked through inclement weather. Unexpected rock was found, slowing progress but not stopping the pipe's installation. Crews have worked long hours to meet deadlines and are anticipating the end of the project.
But wait, you have not pressurized the line. All eyes are on that gauge, hoping to validate that the work was successfully completed.
“It was a normal day on the job while working for the city of Hayward, California. Later that morning, I got word that an earth moving contractor hit our transmission main. My stomach turned because it is one of two feeds that supplies water all the way up the hills of Hayward in a series of 250-foot lifts (elevation gains)…”
The following article was recently featured in McWane Ductile’s Modern McWane magazine and tells of one water professional’s experience when faced with what could have been a catastrophic event, and the decisions he made to resolve a very large pipeline problem.
The more than 75 years of ongoing research on iron pipe corrosion and the use of polyethylene encasement has led to this type of corrosion mediation becoming the accepted industry practice for protecting ductile iron pipe. So, the question many may ask is; “Since I had such success with standard polyethylene encasement, why should I now use V-Bio Polyethylene Encasement instead?” To best answer this, it’s imperative to look at what specifically V-Bio provides that is not available with standard polyethylene encasement.
“Why should I use Ductile iron pipe?”
The question is ostensibly meant to include “instead of other types of piping material.” Well, the reasons are vast and vary depending on project requirements. Since we aren’t talking about a specific project, we’ll look at the general overriding reasons Ductile iron pipe is the best choice for your piping projects.
Can McWane Ductile provide bonded coatings? A good question recently posed and more frequently asked due to a greater recognition of potential corrosive environments. To correctly address this question, some other questions need to be answered first.
If your company provides any goods or services to a governmental entity, such as the Small Business Administration (SBA), Department of Transportation (DOT), or Environmental Protection Agency (EPA), and similar state agencies and municipalities, you may be familiar with requirements to have a percentage of the work performed by Disadvantaged Business Enterprises (DBEs). Many federal, state, and local entities have passed laws and regulations to encourage the use of DBEs in government contracts.
In a continuous effort to make your job easier, we have developed an online submittal builder to quickly and neatly package your personalized presentation.
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Looking for answers to your DI pipe questions? Find decades of Ductile iron expertise with installation guides, videos, tip sheets, training resources, and more in our Learning Center.
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