Fireloop Detail Fireloop Nested Configuration Fireloop Over-Under Configuration

Fireloop expansion joints provide seismic protection for fire-sprinkler systems. They are capable of movement in all directions, and should be installed anywhere that building or pipe movement is expected, including seismic, thermal growth, and building settlement.

Fireloops can accommodate movement in all directions, bringing the same seismic protection offered in the regular Metraloop expansion joints to this life-safety application. Extremely compact, they simplify sprinkler system design and eliminate the need for multiple convoluted joints or grooved couplings fabricated on site.

In seismic applications, a Fireloop is positioned anywhere movement is expected, such as the building’s seismic expansion joints. When the loop is installed vertically or horizontally, the 180-degree return bend of the loop must be supported to allow the entire Fireloop to move freely.

Already installed in thousands of seismic applications for engineered piping systems, as well as applications for thermal movement, connections to machinery, and the AGA-recognized version for natural gas lines, Metraloops and Fireloops have none of the pressure thrust loads of conventional bellows-type joints. They have negligible spring rates and require minimal guiding. They need no anchoring, thrust blocks, or structural steel.

Fireloops are UL-listed for fire-sprinkler systems in sizes from 1/2" through 8". Models are available with several types of end connections: threaded, flanged, welded, or grooved.

Models are assigned based on pipe size, amount of movement, end-to-end length, overall-run length, maximum operating pressure (psi), spring force (lb), weight (lb), and end connections.