In typical cased crossings, a single carrier pipe is placed in a casing pipe in order to allow the buried carrier pipe and its contents to be protected underneath road, rail and other infrastructure.

In applications such as a water treatment plant or a refinery, where there are dozens of pipes that need to be protected, creating a cased crossing for each individual line is costly in both time, construction area and building capital.

To save time, space and cost, utilities have experimented with running multiple carrier lines in a single casing. This tactic will work – unless there are different hot and cold contents flowing in the carrier pipes. Heat expansion in one line but not in the others as it can lead to a catastrophic failure in the entire system!

When one or two of the carrier lines has a higher heat expansion rate than the others in the crossing, the casing and all of the carrier lines are at risk of cracking or rupture.

Martech, along with GPT Casing Spacers, have specially designed multi-line casing spacers to accommodate that expansion and contraction and bear the weight of these carrier lines. Thanks to this revolutionary design, these multi-line conduits now have a high safety factor when in operation and allow more carriers to be installed in the single crossing. This saves the refinery in project and design costs, as well as lower the amount of space used in an often crowded system.

Multiple carrier lines, safe from heat-expansion damage, in a single casing.

Martech and GPT are creating new and innovative cased crossing options for engineers to use in water, wastewater, energy and environmental projects.

How can you get more information about this new multi-line casing spacer?

Contact Martech for more information about these multi-line casing spacers.