Article last updated 8/12/20
Ductile Iron Pipe is a tested and proven solution to sewer infrastructure needs in America. It’s not a cut and dry solution, though, and you as owners and consulting engineers have several options to choose from.
As a municipality, contractor, or an engineering firm, you may have found yourself with a question at your desk or on a jobsite that you simply cannot answer. Sure, we’ve all been there and we all usually find that answer by leaning on our network of resources who specialize in an area of expertise.
So, what happens when you have that technical question while drawing up a set of plans or while at a jobsite? Who are you going to call?
Well, here at McWane Ductile, we want you to know that we’re here to assist you with your water works projects and provide solutions in OUR area of expertise, Ductile Iron Pipe (DI pipe).
Over the years, I have spoken with numerous engineers, utilities, and municipalities, and there seems to be a disconnect when it comes to the overall understanding of when and where cement-mortar-lined pipe can be used in wastewater applications. Due to these grey areas, engineers and owners often specify specialty linings for an entire project when the line could have been specified as either cement-mortar lined ductile iron pipe only or a mixture of specialty lined and cement-lined pipe.
Polyethylene Encasement (Polywrap) was first used in 1958 and has successfully protected millions of feet of both cast and Ductile iron pipe (DI pipe). It has been the most popular method of corrosion control for DI pipe throughout the years. Today, it is the most widely used method of protecting DI pipe in corrosive environments.
Material comparisons, in whatever format presented, are a common and useful tool for evaluating the advantages and disadvantages of one product versus another. These evaluations can assist engineers and specifiers with selecting the proper material, yet must contain relevant and factual details so as not to be vague or misleading. Otherwise, they are no more than bad marketing literature. Such is the case with a recent publication from a plastic pipe manufacturer and their most recent comparison of PVC pipe to Ductile iron pipe (DI pipe)1. In this #IronStrong Blog, we pointedly call out several erroneous claims by “writing the wrongs” contained in the published chart below.
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