Thermite welding, often referred to as CAD welding, on Ductile iron pipe (DI pipe) and products is a common practice in our industry today. This welding technique of using heat from an exothermic reaction to produce coalescence between two metals is most often used to bond the Ductile iron joints for cathodic protection or for the opportunity to add a cathodic protection system at a later date. In this Iron Strong Blog, we will discuss when, why, and how to properly CAD weld on DI pipe.
Dear Ditch Doctor
We recently installed a 15,000-ft 12-inch diameter Ductile iron pipeline with several 6-inch branches off two hydrants. The average depth of cover is 4 feet. The city engineer has expressed a concern that residual groundwater might have entered the pipeline during our installation activities.
Seeing cobwebbing or small cracks in the cement lining of Ductile iron pipe (DI pipe) may raise concern for some and over the years, I’ve had some folks ask me, “Is this acceptable?” And my response is, “Yes, it is, at least to some degree.” Within this Iron Strong Blog, we will discuss Autogenous Healing (au-tog-e-nous), which is defined as the natural process of crack repair that takes place when cement linings come in contact with water.
Have you ever wondered or asked if it is possible to order shorter lengths of bell and spigot Ductile iron pipe (DI pipe) for your waterworks project or sections within it? The answer is YES; we can help you with those shorter lengths of DI pipe for your project.
Did you know the mattress industry is one of the oldest continuous industries in the world? The first mattresses were believed to have been manufactured in 37 BC in Persia. Today, more than 35 million mattresses are shipped world-wide to replace those that have been in service for an average of seven years. So, what does this have to do with Ductile iron pipe (DI pipe), you ask? This article will discuss how setting improper bedding in a pipe trench can cause sleepless nights for the water company and its crews due to pipe failures, seemingly always at night — as it is my experience that most large main breaks typically occur after dark!
Over the years, products manufactured in our country have enhanced our quality of life, and how the products are manufactured makes a difference. U.S. Ductile iron pipe (DI pipe) manufacturers follow stringent guidelines in the manufacture of their products. In this Iron Strong Blog, we will discuss why to consider a domestic only Ductile iron pipe specification.
Over the last several months, I have encountered a few municipalities that have asked the question, does McWane Ductile manufacture TR Flex Restrained Joint Pipe differently than U.S. 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.
Whether you are assembling a toy, playing a game, or installing a waterline…where do you go when you're unsure what to do next?
Read the instructions!
Why do you make Ductile iron pipe with no bell? Who would use such pipe? What is it used for? All good questions from most people in our industry, unless you are a pipe fabricator.
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