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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Spec Sheet

Dog Leg with Carbon Steel or Stainless Steel Fittings

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DOG LEG - THREAD ENDS

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PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
MAX
SATURATED
STEAM
PRESS.
*SPRING
FORCE
LBS.
1/2″       (15mm) DLT40050 ±2″ 15-1/2 1075 300 45
DLT80050 ±4″ 20
3/4″       (20mm) DLT40075 ±2″ 16 792 300 47
DLT80075 ±4″ 21
1″          (25mm) DLT40100 ±2″ 17-1/2 571 300 53
DLT80100 ±4″ 22.5
1-1/4″     (30mm) DLT40125 ±2″ 18-1/2 531 300 66
DLT80125 ±4″ 24
1-1/2″     (40mm) DLT40150 ±2″ 20 472 300 70
DLT80150 ±4″ 25.5
2″          (50mm) DLT40200 ±2″ 22 500 300 78
DLT80200 ±4″ 28
2-1/2″     (65mm) DLT40250 ±2″ 25-1/2 387 300 83
DLT80250 ±4″ 32.5
3″          (80mm) DLT40300 ±2″ 27 288 216 90
DLT80300 ±4″ 34.5
4″        (100mm) DLT40400 ±2″ 30-1/2 232 186 120
DLT80400 ±4″ 38.5


DOG LEG - 150# FLANGED ENDS

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PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
*SPRING
FORCE
LBS.
2″          (50mm) DLF40200 ±2″ 19-1/2 500 78
DLF80200 ±4″ 26
2-1/2″     (65mm) DLF40250 ±2″ 23 387 83
DLF80250 ±4″ 30
3″          (80mm) DLF40300 ±2″ 24-1/2 288 90
DLF80300 ±4″ 32
4″        (100mm) DLF40400 ±2″ 28 232 120
DLF80400 ±4″ 36
5″        (125mm) DLF40500 ±2″ 31 191 186
DLF80500 ±4″ 39.5
6″        (150mm) DLF40600 ±2″ 34 165 202
DLF80600 ±4″ 43
8″        (200mm) DLF40800 ±2″ 38-1/2 212 260
DLF80800 ±4″ 48
10″       (250mm) DLF41000 ±2″ 44 175 283
DLF81000 ±4″ 55
12″       (300mm) DLF41200 ±2″ 49-1/2 160 390
DLF81200 ±4″ 61.5
14″       (355mm) DLF41400 ±2″ 55 110 706
DLF81400 ±4″ 67.5
16″ **     (400mm) DLF41600 ±2″ 58-1/2 110 900
DLF81600 ±4″ 72
18″ **     (455mm) DLF41800 ±2″ 63-1/2 85 1000
DLF81800 ±4″ 77

DOG LEG - WELD ENDS

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PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
MAX
SATURATED
STEAM
PRESS.
*SPRING
FORCE
LBS.
1/2″       (15mm) DLW40050 ±2″ 15-1/2 1075 300 45
DLW80050 ±4″ 20
3/4″       (20mm) DLW40075 ±2″ 16 792 300 47
DLW80075 ±4″ 21
1″          (25mm) DLW40100 ±2″ 17-1/2 571 300 53
DLW80100 ±4″ 22.5
1-1/4″     (30mm) DLW40125 ±2″ 18-1/2 531 300 66
DLW80125 ±4″ 24
1-1/2″     (40mm) DLW40150 ±2″ 20 472 300 70
DLW80150 ±4″ 25.5
2″          (50mm) DLW40200 ±2″ 22 500 300 78
DLW80200 ±4″ 28
2-1/2″     (65mm) DLW40250 ±2″ 25-1/2 387 300 83
DLW80250 ±4″ 32.5
3″          (80mm) DLW40300 ±2″ 27 288 216 90
DLW80300 ±4″ 34.5
4″        (100mm) DLW40400 ±2″ 30-1/2 232 186 120
DLW80400 ±4″ 38.5
5″        (125mm) DLW40500 ±2″ 34 191 153 186
DLW80500 ±4″ 43
6″        (150mm) DLW40600 ±2″ 37-1/2 165 132 202
DLW80600 ±4″ 46.5
8″        (200mm) DLW40800 ±2″ 43-1/2 212 115 260
DLW80800 ±4″ 53
10″       (250mm) DLW41000 ±2″ 49 175 100 383
DLW81000 ±4″ 60
12″       (300mm) DLW41200 ±2″ 54-1/2 160 94 390
DLW81200 ±4″ 66.5


DOG LEG - GROOVED ENDS

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PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
*SPRING
FORCE
LBS.
2″          (50mm) DLG40200 ±2″ 22 500 78
DLG80200 ±4″ 28
2-1/2″     (65mm) DLG40250 ±2″ 25-1/2 387 83
DLG80250 ±4″ 32.5
3″          (80mm) DLG40300 ±2″ 27 288 90
DLG80300 ±4″ 34.5
4″        (100mm) DLG40400 ±2″ 30-1/2 232 120
DLG80400 ±4″ 38.5
5″        (125mm) DLG40500 ±2″ 33 191 186
DLG80500 ±4″ 42
6″        (150mm) DLG40600 ±2″ 36-1/2 165 202
DLG80600 ±4″ 45.5
8″        (200mm) DLG40800 ±2″ 41-1/2 212 260
DLG80800 ±4″ 51
10″       (250mm) DLG41000 ±2″ 47 175 283
DLG81000 ±4″ 58
12″       (300mm) DLG41200 ±2″ 52-1/2 160 390
DLG81200 ±4″ 64.5

DOG LEG - COPPER SWEAT ENDS WITH BRONZE HOSE & BRAID

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PIPE
SIZE
MODEL # MOVEMENT CENTER TO
END (in.)
PSI
SINGLE
BRAID
*SPRING
FORCE
LBS.
1/2″       (15mm) DLS40050 ±2″ 13 706 45
DLS80050 ±4″ 17.5
3/4″       (20mm) DLS40075 ±2″ 14-1/2 577 47
DLS80075 ±4″ 19.5
1″          (25mm) DLS40100 ±2″ 17 470 53
DLS80100 ±4″ 22
1-1/4″     (30mm) DLS40125 ±2″ 19 361 66
DLS80125 ±4″ 24.5
1-1/2″     (40mm) DLS40150 ±2″ 20 329 70
DLS80150 ±4″ 26
2″          (50mm) DLS40200 ±2″ 22-1/2 317 78
DLS80200 ±4″ 29
2-1/2″     (65mm) DLS40250 ±2″ 26 272 83
DLS80250 ±4″ 33
3″          (80mm) DLS40300 ±2″ 27-1/2 201 90
DLS80300 ±4″ 35
4″        (100mm) DLS40400 ±2″ 30-1/2 142 120
DLS80400 ±4″ 38.5

DOG LEG - VRF

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PART # NOM SIZE TUBE OD CENTER TO END MOVEMENT PRESSURE RATING WEIGHT
DLVRF80050 1/2″ 5/8″ 30-1/8″ ±4″ 700 PSI @ 300°F 3 LBS
DLVRF80063 5/8″ 3/4″ 33″ ±4″ 700 PSI @ 300°F 5 LBS
DLVRF80075 3/4″ 7/8″ 33″ ±4″ 700 PSI @ 300°F 5 LBS
DLVRF80100 1″ 1⅛” 34-1/4″ ±4″ 700 PSI @ 300°F 7 LBS
DLVRF80125 1¼″ 1⅜” 36-3/8″ ±4″ 700 PSI @ 300°F 10 LBS
DLVRF80150 1½″ 1 5/8″ 38-3/8″ ±4″ 700 PSI @ 300°F 13 LBS
DLVRF80200 2″ 2⅛” 42″ ±4″ 700 PSI @ 300°F

ALL DLVRF8’S FOR VRF SERVICE ARE RATED FOR FULL VACUUM.

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