Those involved in the construction of water and wastewater pipelines are probably aware of the installation methodology of Horizontal Directional Drilling (HDD). HDD is a trenchless technique that provides an installation alternative offering several benefits over traditional open-cut. HDD can be implemented with minimal disruption to surface activities, requires less working space, and can be performed more quickly than open-cut methods. HDD can be used to install new pipelines or replace existing ones. Also, it can simplify or eliminate certain permitting processes. Although there are currently no national standards regarding HDD installations of municipal underground infrastructure systems, HDD has seen a dramatic increase in recent years and is becoming more common for any pipe material. HDD may be the fastest-growing trenchless construction method today.
What is the maximum internal pressure Ductile iron pipe (DI pipe) can handle, you ask? The simple truth is it depends entirely upon the size of the pipe and its wall thickness. And within any given DI pipe diameter there can be as many as 12 correct yet different answers, given the wide range of intermingled thickness class and pressure class pipe selections available.
In today’s construction world, things are getting more and more technical and precise. As the waterworks industry evolved over the last 100 years, our understanding of installation processes has as well, specifically concerning stray currents emitted in the ground from steel gas or oil pipeline’s cathodic protection system and how they might influence the corrosion of adjacent Ductile iron (DI) pipelines.
Have you ever heard the saying, “To the man who only has a hammer in the tool kit, every problem looks like a nail? (Abraham Maslow)” In the water utility industry, some folks may feel this way when faced with a pipeline installation that must circumvent natural or humanmade obstacles, especially water crossings. So, if going around or above is not an option, then what? How about below?
In today’s modern world, there are more tools available in the water pipeline construction toolkit such as the Open Trench Method, the Pier Supported System, and Horizontal Directional Drilling or HDD. In this blog, we’ll discuss the benefits of using Ductile iron pipe (DI pipe) for HDD and provide some considerations and tips for your pipeline installation.
Odds are you may not be a certified corrosion specialist or an expert in the corrosion field for that matter. Most engineers that are responsible for specifying water projects are not. There are of course engineers who dedicate their entire careers to the subject. The good news is that McWane Ductile is committed to excellence in the corrosion field and provides professionals to assist you with making sound decisions regarding corrosion control.
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