Dog Leg Expansion Joint

Metraloop

The Dog Leg is in the Metraloop family of products. It incorporates the same proven hose and braid technology but in this case at right angles to each other.  This gives the benefit of absorbing movement from two different runs…

Product Description

Product Highlights

Additional Resources

Submittals

Product Description

The Dog Leg is in the Metraloop family of products. It incorporates the same proven hose and braid technology but in this case at right angles to each other.  This gives the benefit of absorbing movement from two different runs of pipe.  Another advantage is that the dog Leg stays in the original path of the pipping, making it the most compact way to absorb pipe movement.  For all these reasons the Dog Leg is often used in Value Engineering a piping system

Like all the products in the Metraloop family of products, the Dog Leg does not develop thrust loads, and this results in almost eliminating the need for guides, simplifying anchor design when compared to in line bellows expansion joints.  When you place a Dog Leg in your line, you instantly reduce the stresses in the line.

For all the above reasons, the Dog Leg is a very popular option when Value Engineering a piping system

Options

  • Liners for high velocity or abrasive material
  • Exterior coatings for protection in corrosive environments.
  • Double braided for high pressure or steam applications.
  • Any fitting that can be welded or brazed to can be used.
  • Higher pressure versions available

Product Highlights

  • The one joint that accommodates pipe movement from two runs of pipe.
  • Available in stock configurations up to 12” diameter and custom configuration up to 36” diameter
  • Utilized for both thermal and seismic applications
  • Capable of movement in all directions
  • Develops minimal anchor loads, resulting in minimal guiding and anchoring requirements
  • Proudly made in the USA

Additional Resources

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Literature

Metraflex-Metraloop.pdf

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Spec Sheet

Dog Leg with Carbon Steel or Stainless Steel Fittings

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DOG LEG - THREAD ENDS

Group 8 Created with Sketch.

PIPE
SIZE
MODEL #MOVEMENTCENTER TO
END (in.)
PSI
SINGLE
BRAID
MAX
SATURATED
STEAM
PRESS.
*SPRING
FORCE
LBS.
1/2″       (15mm)DLT80050±4″20107530045
3/4″       (20mm)DLT80075±4″2179230047
1″          (25mm)DLT80100±4″22.557130053
1-1/4″     (30mm)DLT80125±4″2453130066
1-1/2″     (40mm)DLT80150±4″25.547230070
2″          (50mm)DLT80200±4″2850030078
2-1/2″     (65mm)DLT80250±4″32.538730083
3″          (80mm)DLT80300±4″34.528821690
4″        (100mm)DLT80400±4″38.5232186120

DOG LEG - 150# FLANGED ENDS

Group 8 Created with Sketch.

PIPE
SIZE
MODEL #MOVEMENTCENTER TO
END (in.)
PSI
SINGLE
BRAID
*SPRING
FORCE
LBS.
2″          (50mm)DLF80200±4″2650078
2-1/2″     (65mm)DLF80250±4″3038783
3″          (80mm)DLF80300±4″3228890
4″        (100mm)DLF80400±4″36232120
5″        (125mm)DLF80500±4″39.5191186
6″        (150mm)DLF80600±4″43165202
8″        (200mm)DLF80800±4″48212260
10″       (250mm)DLF81000±4″55175283
12″       (300mm)DLF81200±4″61.5160390
14″       (355mm)DLF81400±4″67.5110706
16″ **     (400mm)DLF81600±4″72110900
18″ **     (455mm)DLF81800±4″77851000

DOG LEG - WELD ENDS

Group 8 Created with Sketch.

PIPE
SIZE
MODEL #MOVEMENTCENTER TO
END (in.)
PSI
SINGLE
BRAID
MAX
SATURATED
STEAM
PRESS.
*SPRING
FORCE
LBS.
1/2″       (15mm)DLW80050±4″20107530045
3/4″       (20mm)DLW80075±4″2179230047
1″          (25mm)DLW80100±4″22.557130053
1-1/4″     (30mm)DLW80125±4″2453130066
1-1/2″     (40mm)DLW80150±4″25.547230070
2″          (50mm)DLW80200±4″2850030078
2-1/2″     (65mm)DLW80250±4″32.538730083
3″          (80mm)DLW80300±4″34.528821690
4″        (100mm)DLW80400±4″38.5232186120
5″        (125mm)DLW80500±4″43191153186
6″        (150mm)DLW80600±4″46.5165132202
8″        (200mm)DLW80800±4″53212115260
10″       (250mm)DLW81000±4″60175100383
12″       (300mm)DLW81200±4″66.516094390

DOG LEG - GROOVED ENDS

Group 8 Created with Sketch.

PIPE
SIZE
MODEL #MOVEMENTCENTER TO
END (in.)
PSI
SINGLE
BRAID
*SPRING
FORCE
LBS.
2″          (50mm)DLG80200±4″2850078
2-1/2″     (65mm)DLG80250±4″32.538783
3″          (80mm)DLG80300±4″34.528890
4″        (100mm)DLG80400±4″38.5232120
5″        (125mm)DLG80500±4″42191186
6″        (150mm)DLG80600±4″45.5165202
8″        (200mm)DLG80800±4″51212260
10″       (250mm)DLG81000±4″58175283
12″       (300mm)DLG81200±4″64.5160390

DOG LEG - Copper Sweat Ends with Bronze Hose & Braid

Group 8 Created with Sketch.

PIPE
SIZE
MODEL #MOVEMENTCENTER TO
END (in.)
PSI
SINGLE
BRAID
*SPRING
FORCE
LBS.
1/2″       (15mm)DLS80050±4″17.570645
3/4″       (20mm)DLS80075±4″19.557747
1″          (25mm)DLS80100±4″2247053
1-1/4″     (30mm)DLS80125±4″24.536166
1-1/2″     (40mm)DLS80150±4″2632970
2″          (50mm)DLS80200±4″2931778
2-1/2″     (65mm)DLS80250±4″3327283
3″          (80mm)DLS80300±4″3520190
4″        (100mm)DLS80400±4″38.5142120

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