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.
I have been on the road for nearly 20 years, talked with numerous contractors and distributors during that time, and there is a common question that I often get asked, "Why do Ductile iron pipe lengths vary?"
It is very common to get certain questions from our customers regarding the interchangeability of push-on or compression type gaskets that are typically supplied with Ductile iron pipe. These questions are usually easy to answer in a very definitive manner, but there are some exceptions. In this edition of Iron Strong, we will address the three most common questions about gaskets and why this can sometimes be confusing to our customers.
One thing that has often confused users (whether I’m talking with engineers, distributors or contractors) is the difference between “Thickness Class” and “Pressure Class” pipe. While both refer to a specific metal wall thickness of the pipe barrel, in this article we will discuss the history of the two class standards, and what class of ductile iron pipe you should use in your application.
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