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Fireloop®

Seismic U-Loop Style Expansion Joint

The Metraflex® Fireloop® seismic expansion joint for fire sprinkler systems is an extremely flexible joint accommodating movement in all directions, providing excellent seismic protection. It meets NFPA 13 guidelines and is UL listed and FM Approved. Available from Metraflex, the…
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Product Description
Product Highlights
Additional Resources
Submittals
Product Description

The Metraflex® Fireloop® seismic expansion joint for fire sprinkler systems is an extremely flexible joint accommodating movement in all directions, providing excellent seismic protection. It meets NFPA 13 guidelines and is UL listed and FM Approved.

Available from Metraflex, the leader in seismic pipe protection, the Fireloop® expansion joint is capable of movement in all directions with sizes able to accommodate movements up to ±45 inches. It should be installed anywhere building or pipe movement is expected, including seismic, thermal growth and building settlement.

In seismic applications, the FireLoop® is positioned anywhere movement is expected, such as the building’s seismic joint. When the loop is installed vertically or horizontally, the 180-degree return bend of the loop requires just one hanger support to allow the entire FireLoop® expansion joint to move freely.

FBC™ System Compatible indicates that this product has been tested, and is monitored on an ongoing basis, to assure its chemical compatibility with FlowGuard Gold®, BlazeMaster® and Corzan® piping systems and products made with TempRite® Technology. The FBC System Compatible Logo, FBC™, FlowGuard Gold®, BlazeMaster®, Corzan®, and TempRite® are trademarks of Lubrizol Advanced Materials, Inc. or its affiliates.

Other FireLoop® Styles:
View Stainless Steel FireLoop®, View High Pressure FireLoop®

Product Highlights
  • The proven way to absorb seismic movement in Fire Sprinkler/Fire Suppression Systems
  • UL/FM Approved Seismic Separation Assembly as shown in NFPA 13
  • Stock sizes from 1″ diameter through 12″ diameter
  • Available in movements up to +/-45″
  • Compatible with our patented Seismic Breakaway Hanger Support
Metraflex Fireloop
PDF Literature
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Metraflex FireLoop Install
O&M
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Pressure Loss Charts
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Additional Resources
Metraflex Fireloop
PDF Literature
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Metraflex FireLoop Install
O&M
Download
Pressure Loss Charts
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Fireloop fm Grooved 4in
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Fireloop fm Grooved 8in
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Fireloop fm Grooved 16in
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Fireloop fm Grooved 24in
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Fireloop fm Threaded 4in
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Fireloop fm Threaded 8in
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Fireloop fm Threaded 16in
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Fireloop ul Flanged 4in
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Fireloop ul Flanged 8in
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Fireloop ul Flanged 16in
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Fireloop ul Flanged 24in
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Submittals
Fireloop UL/FM Grooved ±4" Movement
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Fireloop UL/FM Grooved ±8" Movement
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Fireloop UL/FM Grooved ±16" Movement
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Fireloop UL/FM Grooved ±24" Movement
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Fireloop UL/FM Threaded ±4" Movement
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Fireloop UL/FM Threaded ±8" Movement
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Fireloop UL/FM Threaded ±16" Movement
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Fireloop UL Flanged ±4" Movement
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Fireloop UL Flanged ±8" Movement
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Fireloop UL Flanged ±16" Movement
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Fireloop UL Flanged ±24" Movement
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GROOVED ENDS ±4" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
1″
(25mm)		 MLUGFM80100  ±4″ 15″ 20″ 300 53 8 BIM/CAD/REVIT
1-1/4″
(32mm)		 MLUGFM80125 ±4″ 15-3/4″ 21″ 300 66 10 BIM/CAD/REVIT
1-1/2″
(40mm)		 MLUGFM80150 ±4″ 17-1/2″ 23″ 300 70 15 BIM/CAD/REVIT
2″
(50mm)		 MLUGFM80200 ±4″ 20″ 25″ 300 78 18 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUGFM80250 ±4″ 21-1/2″ 28″ 300 83 29 BIM/CAD/REVIT
3″
(80mm)		 MLUGFM80300 ±4″ 24″ 30″ 300 90 43 BIM/CAD/REVIT
4″
(100mm)		 MLUGFM80400 ±4″ 30″ 35″ 175 120 60 BIM/CAD/REVIT
5″
(125mm)		 MLUGFM80500 ±4″ 36″ 40″ 175 186 99 BIM/CAD/REVIT
6″
(150mm)		 MLUGFM80600 ±4″ 42″ 46″ 175 202 150 BIM/CAD/REVIT
8″
(200mm)		 MLUGFM80800 ±4″ 56″ 58″ 175 260 286 BIM/CAD/REVIT
10″
(250mm)		 MLUGFM81000 ±4″ 68″ 64″ 175 283 450 BIM/CAD/REVIT
12″
(300mm)		 MLUGFM81200 ±4″ 80″ 73″ 175 390 665 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

GROOVED ENDS ±8" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
1″
(25mm)		 MLUGFM160100  ±8″ 18″ 23″ 300 53 8 BIM/CAD/REVIT
1-1/4″
(32mm)		 MLUGFM160125 ±8″ 19″ 25″ 300 66 10 BIM/CAD/REVIT
1-1/2″
(40mm)		 MLUGFM160150 ±8″ 21″ 27″ 300 70 15 BIM/CAD/REVIT
2″
(50mm)		 MLUGFM160200 ±8″ 23″ 30″ 300 78 19 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUGFM160250 ±8″ 25″ 34″ 300 83 31 BIM/CAD/REVIT
3″
(80mm)		 MLUGFM160300 ±8″ 27″ 37″ 300 90 45 BIM/CAD/REVIT
4″
(100mm)		 MLUGFM160400 ±8″ 31-1/2″ 43″ 175 120 64 BIM/CAD/REVIT
5″
(125mm)		 MLUGFM160500 ±8″ 36″ 48″ 175 202 105 BIM/CAD/REVIT
6″
(150mm)		 MLUGFM160600 ±8″ 42″ 55″ 175 202 160 BIM/CAD/REVIT
8″
(200mm)		 MLUGFM160800 ±8″ 56″ 70″ 175 260 297 BIM/CAD/REVIT
10″
(250mm)		 MLUGFM161000 ±8″ 68″ 74.5″ 175 283 485 BIM/CAD/REVIT
12″
(300mm)		 MLUGFM161200 ±8″ 80″ 84.5″ 175 390 675 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

GROOVED ENDS ±16" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
1″
(25mm)		 MLUGFM320100  ±16″ 27″ 29″ 300 53 8 BIM/CAD/REVIT
1-1/4″
(32mm)		 MLUGFM320125 ±16″ 28″ 32″ 300 66 10 BIM/CAD/REVIT
1-1/2″
(40mm)		 MLUGFM320150 ±16″ 29″ 34″ 300 70 14 BIM/CAD/REVIT
2″
(50mm)		 MLUGFM320200 ±16″ 31″ 39″ 300 78 21 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUGFM320250 ±16″ 33″ 45″ 300 83 34 BIM/CAD/REVIT
3″
(80mm)		 MLUGFM320300 ±16″ 35″ 48″ 300 90 44 BIM/CAD/REVIT
4″
(100mm)		 MLUGFM320400 ±16″ 40″ 56″ 175 120 70 BIM/CAD/REVIT
5″
(125mm)		 MLUGFM320500 ±16″ 44″ 62″ 175 186 107 BIM/CAD/REVIT
6″
(150mm)		 MLUGFM320600 ±16″ 48″ 68″ 175 202 157 BIM/CAD/REVIT
8″
(200mm)		 MLUGFM320800 ±16″ 58″ 78″ 175 260 293 BIM/CAD/REVIT
10″
(250mm)		 MLUGFM321000 ±16″ 68″ 90″ 175 283 534 BIM/CAD/REVIT
12″
(300mm)		 MLUGFM321200 ±16″ 80″ 102″ 175 390 732 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

GROOVED ENDS ±24" Movement

 

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
1″
(25mm)		 MLUGFM480100  ±24″ 34″ 35″ 300 53 14 BIM/CAD/REVIT
1-1/4″
(32mm)		 MLUGFM480125 ±24″ 35″ 38″ 300 66 18 BIM/CAD/REVIT
1-1/2″
(40mm)		 MLUGFM480150 ±24″ 37″ 41″ 300 70 24 BIM/CAD/REVIT
2″
(50mm)		 MLUGFM480200 ±24″ 39″ 47″ 300 78 38 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUGFM480250 ±24″ 41″ 52″ 300 83 62 BIM/CAD/REVIT
3″
(80mm)		 MLUGFM480300 ±24″ 43″ 56″ 300 90 87 BIM/CAD/REVIT
4″
(100mm)		 MLUGFM480400 ±24″ 47-1/2″ 63″ 175 120 119 BIM/CAD/REVIT
5″
(125mm)		 MLUGFM480500 ±24″ 51-1/2″ 70″ 175 186 195 BIM/CAD/REVIT
6″
(150mm)		 MLUGFM480600 ±24″ 55-1/2″ 79″ 175 202 290 BIM/CAD/REVIT
8″
(200mm)		 MLUGFM480800 ±24″ 65-1/2″ 99″ 175 260 500 BIM/CAD/REVIT
10″
(250mm)		 MLUGFM481000 ±24″ 74″ 102″ 175 283 596 BIM/CAD/REVIT
12″
(300mm)		 MLUGFM481200 ±24″ 84″ 115″ 175 390 800 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

THREAD ENDS ±4" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
1/2″
(15mm)		 MLUTFM80050  ±4″ 13″ 15″ 300 45 5.55 BIM/CAD/REVIT
3/4″
(20mm)		 MLUTFM80075 ±4″ 13-1/4″ 18″ 300 47 5.5 BIM/CAD/REVIT
1″
(25mm)		 MLUTFM80100 ±4″ 15″ 20″ 300 53 8 BIM/CAD/REVIT
1-1/4″
(32mm)		 MLUTFM80125 ±4″ 15-3/4″ 21″ 300 66 10 BIM/CAD/REVIT
1-1/2″
(40mm)		 MLUTFM80150 ±4″ 17-1/2″ 23″ 300 70 14.5 BIM/CAD/REVIT
2″
(50mm)		 MLUTFM80200 ±4″ 20″ 25″ 300 78 18 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUTFM80250 ±4″ 21-1/2″ 28″ 300 83 29 BIM/CAD/REVIT
3″
(80mm)		 MLUTFM80300 ±4″ 24″ 30″ 300 90 43 BIM/CAD/REVIT
4″
(100mm)		 MLUTFM80400 ±4″ 30″ 35″ 175 120 55 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

THREAD ENDS ±8" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
1/2″
(15mm)		 MLUTFM160050  ±8″ 16″ 20″ 300 45 5.55 BIM/CAD/REVIT
3/4″
(20mm)		 MLUTFM160075 ±8″ 16″ 21″ 300 47 5.5 BIM/CAD/REVIT
1″
(25mm)		 MLUTFM160100 ±8″ 18″ 23″ 300 53 8 BIM/CAD/REVIT
1-1/4″
(32mm)		 MLUTFM160125 ±8″ 19″ 25″ 300 66 10 BIM/CAD/REVIT
1-1/2″
(40mm)		 MLUTFM160150 ±8″ 21″ 27″ 300 70 14.5 BIM/CAD/REVIT
2″
(50mm)		 MLUTFM160200 ±8″ 23″ 30″ 300 78 18 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUTFM160250 ±8″ 25″ 34″ 300 83 29 BIM/CAD/REVIT
3″
(80mm)		 MLUTFM160300 ±8″ 27″ 37″ 300 90 43 BIM/CAD/REVIT
4″
(100mm)		 MLUTFM160400 ±8″ 31-1/2″ 43″ 175 120 55 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

THREAD ENDS ±16" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
1/2″
(15mm)		 MLUTFM320050  ±16″ 26″ 25″ 300 45 4 BIM/CAD/REVIT
3/4″
(20mm)		 MLUTFM320075 ±16″ 26-1/2″ 28″ 300 47 6 BIM/CAD/REVIT
1″
(25mm)		 MLUTFM320100 ±16″ 27″ 29″ 300 53 8 BIM/CAD/REVIT
1-1/4″
(32mm)		 MLUTFM320125 ±16″ 28″ 32″ 300 66 12 BIM/CAD/REVIT
1-1/2″
(40mm)		 MLUTFM320150 ±16″ 29″ 34″ 300 70 14 BIM/CAD/REVIT
2″
(50mm)		 MLUTFM320200 ±16″ 31″ 39″ 300 78 21 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUTFM320250 ±16″ 33″ 45″ 300 83 34 BIM/CAD/REVIT
3″
(80mm)		 MLUTFM320300 ±16″ 35″ 48″ 300 90 44 BIM/CAD/REVIT
4″
(100mm)		 MLUTFM320400 ±16″ 40″ 56″ 175 120 70 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

150# FLANGED ENDS ±4" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
2″
(50mm)		 MLUF80200  ±4″ 14-1/2″ 25″ 300 78 24 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUF80250 ±4″ 16″ 28″ 300 83 36 BIM/CAD/REVIT
3″
(80mm)		 MLUF80300 ±4″ 18-1/2″ 30″ 300 90 50 BIM/CAD/REVIT
4″
(100mm)		 MLUF80400 ±4″ 24-1/2″ 35″ 175 120 69 BIM/CAD/REVIT
5″
(125mm)		 MLUF80500 ±4″ 30-1/2″ 40″ 175 186 101 BIM/CAD/REVIT
6″
(150mm)		 MLUF80600 ±4″ 36-1/2″ 46″ 175 202 163 BIM/CAD/REVIT
8″
(200mm)		 MLUF80800 ±4″ 48-1/2″ 58″ 175 260 309 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

150# FLANGED ENDS ±8" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
2″
(50mm)		 MLUF160200  ±8″ 17-1/2″ 30″ 300 78 19 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUF160250 ±8″ 19-1/2″ 34″ 300 83 31 BIM/CAD/REVIT
3″
(80mm)		 MLUF160300 ±8″ 21-1/2″ 37″ 300 90 45 BIM/CAD/REVIT
4″
(100mm)		 MLUF160400 ±8″ 26″ 43″ 175 120 64 BIM/CAD/REVIT
5″
(125mm)		 MLUF160500 ±8″ 30-1/2″ 48″ 175 186 105 BIM/CAD/REVIT
6″
(150mm)		 MLUF160600 ±8″ 36-1/2″ 55″ 175 202 160 BIM/CAD/REVIT
8″
(200mm)		 MLUF160800 ±8″ 48-1/2″ 70″ 175 260 297 BIM/CAD/REVIT
10″
(250mm)		 MLUF161000 ±8″ 60-1/2″ 74-1/2″ 175 283 485 BIM/CAD/REVIT
12″
(300mm)		 MLUF161200 ±8″ 72-1/2″ 84-1/2″ 175 390 675 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

150# FLANGED ENDS ±16" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
2″
(50mm)		 MLUF320200  ±16″ 25-1/2″ 39″ 300 78 21 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUF320250 ±16″ 27-1/2″ 45″ 300 83 34 BIM/CAD/REVIT
3″
(80mm)		 MLUF320300 ±16″ 29-1/2″ 48″ 300 90 44 BIM/CAD/REVIT
4″
(100mm)		 MLUF320400 ±16″ 34-1/2″ 56″ 175 120 70 BIM/CAD/REVIT
5″
(125mm)		 MLUF320500 ±16″ 38-1/2″ 62″ 175 186 107 BIM/CAD/REVIT
6″
(150mm)		 MLUF320600 ±16″ 42-1/2″ 68″ 175 202 157 BIM/CAD/REVIT
8″
(200mm)		 MLUF320800 ±16″ 50-1/2″ 78″ 175 260 293 BIM/CAD/REVIT
10″
(250mm)		 MLUF321000 ±16″ 60-1/2″ 90″ 175 283 534 BIM/CAD/REVIT
12″
(300mm)		 MLUF321200 ±16″ 72-1/2″ 102″ 175 390 732 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)

150# FLANGED ENDS ±24" Movement

Fittings – Sched. 40 Carbon Steel Hose & Braid – Series 300 Stainless Steel

Pipe Size MODEL# MOVEMENT END TO END LENGTH PSI *SPRING FORCE LBS. WEIGHT LBS. 3D DRAWING
2″
(50mm)		 MLUF480200  ±24″ 33-1/2″ 47″ 300 78 21 BIM/CAD/REVIT
2-1/2″
(65mm)		 MLUF480250 ±24″ 35-1/2″ 52″ 300 83 34 BIM/CAD/REVIT
3″
(80mm)		 MLUF480300 ±24″ 37-1/2″ 56″ 300 90 44 BIM/CAD/REVIT
4″
(100mm)		 MLUF480400 ±24″ 42″ 63″ 175 120 70 BIM/CAD/REVIT
5″
(125mm)		 MLUF480500 ±24″ 46″ 70″ 175 186 107 BIM/CAD/REVIT
6″
(150mm)		 MLUF480600 ±24″ 50″ 79″ 175 202 157 BIM/CAD/REVIT
8″
(200mm)		 MLUF480800 ±24″ 58″ 99″ 175 260 293 BIM/CAD/REVIT
10″
(250mm)		 MLUF481000 ±24″ 66-1/2″ 102″ 175 283 596 BIM/CAD/REVIT
12″
(300mm)		 MLUF481200 ±24″ 76-1/2″ 115″ 175 390 800 BIM/CAD/REVIT

*Spring Force: These values reflect the total force required to move the FireLoop its full rated movement for 150 P.S.I. at 70°F.
For Metric Pressure Rating PSI x 0.070307 = kg/cm(2)