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

PDF Icon

Literature

Metraflex-Metraloop.pdf

Download Now Group 3 Copy 3 Created with Sketch.
PDF Icon

Spec Sheet

Dog Leg with Carbon Steel or Stainless Steel Fittings

Download Now Group 3 Copy 3 Created with Sketch.

DOG LEG - THREAD ENDS

Group 8 Created with Sketch.

PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
MAX
SATURATED
STEAM
PRESS.
*SPRING
FORCE
LBS.
1/2″       (15mm) DLT80050 ±4″ 20 1075 300 45
3/4″       (20mm) DLT80075 ±4″ 21 792 300 47
1″          (25mm) DLT80100 ±4″ 22.5 571 300 53
1-1/4″     (30mm) DLT80125 ±4″ 24 531 300 66
1-1/2″     (40mm) DLT80150 ±4″ 25.5 472 300 70
2″          (50mm) DLT80200 ±4″ 28 500 300 78
2-1/2″     (65mm) DLT80250 ±4″ 32.5 387 300 83
3″          (80mm) DLT80300 ±4″ 34.5 288 216 90
4″        (100mm) DLT80400 ±4″ 38.5 232 186 120

DOG LEG - 150# FLANGED ENDS

Group 8 Created with Sketch.

PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
*SPRING
FORCE
LBS.
2″          (50mm) DLF80200 ±4″ 26 500 78
2-1/2″     (65mm) DLF80250 ±4″ 30 387 83
3″          (80mm) DLF80300 ±4″ 32 288 90
4″        (100mm) DLF80400 ±4″ 36 232 120
5″        (125mm) DLF80500 ±4″ 39.5 191 186
6″        (150mm) DLF80600 ±4″ 43 165 202
8″        (200mm) DLF80800 ±4″ 48 212 260
10″       (250mm) DLF81000 ±4″ 55 175 283
12″       (300mm) DLF81200 ±4″ 61.5 160 390
14″       (355mm) DLF81400 ±4″ 67.5 110 706
16″ **     (400mm) DLF81600 ±4″ 72 110 900
18″ **     (455mm) DLF81800 ±4″ 77 85 1000

DOG LEG - WELD ENDS

Group 8 Created with Sketch.

PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
MAX
SATURATED
STEAM
PRESS.
*SPRING
FORCE
LBS.
1/2″       (15mm) DLW80050 ±4″ 20 1075 300 45
3/4″       (20mm) DLW80075 ±4″ 21 792 300 47
1″          (25mm) DLW80100 ±4″ 22.5 571 300 53
1-1/4″     (30mm) DLW80125 ±4″ 24 531 300 66
1-1/2″     (40mm) DLW80150 ±4″ 25.5 472 300 70
2″          (50mm) DLW80200 ±4″ 28 500 300 78
2-1/2″     (65mm) DLW80250 ±4″ 32.5 387 300 83
3″          (80mm) DLW80300 ±4″ 34.5 288 216 90
4″        (100mm) DLW80400 ±4″ 38.5 232 186 120
5″        (125mm) DLW80500 ±4″ 43 191 153 186
6″        (150mm) DLW80600 ±4″ 46.5 165 132 202
8″        (200mm) DLW80800 ±4″ 53 212 115 260
10″       (250mm) DLW81000 ±4″ 60 175 100 383
12″       (300mm) DLW81200 ±4″ 66.5 160 94 390

DOG LEG - GROOVED ENDS

Group 8 Created with Sketch.

PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
*SPRING
FORCE
LBS.
2″          (50mm) DLG80200 ±4″ 28 500 78
2-1/2″     (65mm) DLG80250 ±4″ 32.5 387 83
3″          (80mm) DLG80300 ±4″ 34.5 288 90
4″        (100mm) DLG80400 ±4″ 38.5 232 120
5″        (125mm) DLG80500 ±4″ 42 191 186
6″        (150mm) DLG80600 ±4″ 45.5 165 202
8″        (200mm) DLG80800 ±4″ 51 212 260
10″       (250mm) DLG81000 ±4″ 58 175 283
12″       (300mm) DLG81200 ±4″ 64.5 160 390

DOG LEG - Copper Sweat Ends with Bronze Hose & Braid

Group 8 Created with Sketch.

PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
*SPRING
FORCE
LBS.
1/2″       (15mm) DLS80050 ±4″ 17.5 706 45
3/4″       (20mm) DLS80075 ±4″ 19.5 577 47
1″          (25mm) DLS80100 ±4″ 22 470 53
1-1/4″     (30mm) DLS80125 ±4″ 24.5 361 66
1-1/2″     (40mm) DLS80150 ±4″ 26 329 70
2″          (50mm) DLS80200 ±4″ 29 317 78
2-1/2″     (65mm) DLS80250 ±4″ 33 272 83
3″          (80mm) DLS80300 ±4″ 35 201 90
4″        (100mm) DLS80400 ±4″ 38.5 142 120

Find Your Local Metraflex Representative.

Find a Rep
Rep icon Your Local Rep