Cement-mortar lining for iron pipe has been used for nearly 100 years. The first installation of gray iron pipe with a cement lining was recorded in Savannah, GA in 1922. Todays modern Ductile iron pipe still utilizes cement lining for a safe and reliable means of providing clean drinking water to millions of people every day.
On occasion, however, the cement lining may have incurred some damage in the field. The lining, although very durable, does not have the same resistance to bending stress or impact as the pipe itself. Certainly, the pipe or fitting should be checked for further structural damage, but once determined the affected area is only the cement lining, repairs can be made under the applicable provisions within the ANSI/AWWA C104/A21.4 standard CEMENT-MORTAR LINING FOR DUCTILE IRON PIPE AND FITTINGS.
On July 24, 2018 the ½ Day of Water event took place at the state-of-the-art training facility in West Palm Beach Florida. The utility’s sprawling and beautiful center has significant space for hands-on training, large dual-screen high-resolution digital presentations, individual and group computer skills and software training, and so much more. Nearly 40 Palm Beach County utility workers, ranging from field personnel to design engineers, plant operators, and department managers were in attendance.
All ductile iron pipe manufacturers use markings in a similar manner to assist customers in selecting the right material for the project. This includes verifying the material is suitable for the application intended (i.e. water or sewer) as well as adhering to the project requirements as stipulated by the owner/engineer for pipe class, lining, and exterior coating.
Because the colors used by each manufacturer may vary, we will explain how McWane Ductile applies these markings and describe their need and locations.
Many of you may have had the opportunity to attend the AWWA/ACE 18 Conference held in Las Vegas just a few weeks ago. Among the many highlights of that show is the Annual Pipe Tapping Contest.
The participants consist of both US and International teams that are selected through a qualifying process where they would have competed in various regional or sectional events held throughout the preceding year.
Spigot stripes are used as a guide for assembly and a deflection check after assembly. Pipelines are not always designed in a straight line. It is often necessary to deflect pipe from a straight line to follow the curvature of streets and roads both vertically and horizontally. Ductile iron pipe is well suited for joint deflection.
TR Flex® is the most-widely accepted and installed integrally-cast restraint joint system in the ductile iron pipe industry. Proven as a versatile and easy-to-use item, this joint is flexible, sure, and watertight to and beyond it’s up-to-350-psi pressure rating while preventing longitudinal separation of the joints whether installed above or below ground.
Having managed water and wastewater systems for most of my career, I have engaged with interest in the operations of specific water systems. Many times, those conversations have lead into areas beyond the engineering criteria for daily operations and into areas such as customer satisfaction. The great majority of these systems meet all required regulatory quality standards each day. Then why do customers become dissatisfied with the utility? One notable answer: SERVICE.
Polyethylene encasement (polywrap) has been used since 1958 to protect ductile iron pipe from corrosion. It is the most popular, economical, and successful method for protecting pipe from corrosion.
A new advancement in polyethylene encasement called V-Bio® adds additional protection by inhibiting the formation of corrosion cells under the wrap. McWane Ductile added V-Bio® polywrap to its line of products in 2015. Adding a few steps to your pipe installation with V-Bio® is an Iron Strong decision that will benefit your pipeline for generations.
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