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Double Chain Pipe Clamp

The Mathey Dearman Double Chain clamp is a heavy-duty vessel clamp designed for alignment and reforming of pipes and vessels up to 20’ (6 m) in diameter with schedule 80 wall thickness.

The Double Chain clamp also aligns schedule 80 pipe and heavier when no reforming is required. The extra heavy-duty jackbars and main block provide the brute strength necessary to accomplish even the toughest reforming jobs.

Models 10″ to 36″ through 10″ to 54″ can use a level and support device, and all other models can use a cable hoist, which can be purchased as an accessory.

The Double Chain clamp is available in steel and stainless steel versions.

ONLY STOCKED IN AMERICAS

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Product Advantages

  • Precise: Numerous jackbars provide clamping pressure exactly where needed for perfect alignment
  • Tough: Reforms and aligns pipe with schedule 80 wall thickness
  • Adaptable: Fits extremely large range of pipe diameters
  • Conforming: Jackbar pads pivot independently to handle uneven pipe and fitting surfaces

Heavy-duty jackbars for arduous aligning and reforming jobs

MagSquare magnets are now standard with all double chain clamps to make setup simple and easy.

Joints on large pipe or tube shells up to 240″ / 6,096 mm in diameter can be aligned, reformed, and welded without removing the clamp, saving time and improving weld quality.
Hydraulic closure mechanism.

Perfect for clamping larger diameters and applying extra clamp load, Mathey Dearman’s hydraulic chain clamp closure mechanism uses a 5″ / 127 mm stroke to apply up to 10,000 lbs / 4,535 kg of tension to the standard Double Chain clamp.

Hydraulic pressure is supplied to the closure mechanism’s hydraulic cylinder by a hand pump with a reservoir. Tension can be applied to close the clamp on the pipe.

Using the hydraulic closure mechanism, our Double Chain clamp is able to align pipe up to schedule 120 and reform pipe to schedule 80.

Double Chain clamp includes:

  • 2 Nickel-plated or stainless steel high-strength leaf chains
  • Extra heavy-duty stainless steel jackbars (quantity as listed in specifications)
  • Double chain main block with 2 fine adjustments
  • D251-1060 model and larger supplied with cable hoist
  • Jackscrew breaker bar with socket
  • Parts and operating manual

Accessory – purchase as necessary: Level and support device

We have been manufacturing and selling the double chain clamp for over 90 years.

Specifications

PART NO. NO OF MAIN BLOCKS NO OF JACKBARS PIPE SIZE RANGE REFORMS/ALIGNS PIPE TO SCHEDULE*
D251-1036 1 9 10″ – 36″ / 273 – 914 mm 80 / 160
* D251-1036SS 1 9 10″ – 36″ / 273 – 914 mm 80 / 160
D251-1048 1 12 10″ – 48″ / 273 – 1,219 mm 80 / 160
* D251-1048SS 1 12 10″ – 48″ / 273 – 1,219 mm 80 / 160
D251-1054 1 14 10″ – 54″ / 273 – 1,372 mm 80 / 160
* D251-1054SS 1 14 10″ – 54″ / 273 – 1,372 mm 80 / 160
D251-1060 1 16 10″ – 60″ / 273 – 1,524 mm 80 / 160
* D251-1060SS 1 16 10″ – 60″ / 273 – 1,524 mm 80 / 160
D251-1072 1 20 10″ – 72″ / 273 – 1,829 mm 80 / 160
* D251-1072SS 1 20 10″ – 72″ / 273 – 1,829 mm 80 / 160
D251-1084 1 24 10″ – 84″ / 273 – 2,134 mm 80 / 160
* D251-1084SS 1 24 10″ – 84″ / 273 – 2,134 mm 80 / 160
D251-1096 2 28 10″ – 96″ / 273 – 2,438 mm 80 / 160
* D251-1096SS 2 28 10″ – 96″ / 273 – 2,438 mm 80 / 160
D251-10108 2 32 10″ – 108″ / 273 – 2,743 mm 80 / 160
* D251-10108SS 2 32 10″ – 108″ / 273 – 2,743 mm 80 / 160
D251-10120 2 36 10″ – 120″ / 273 – 3,048 mm 80 / 160
* D251-10120SS 2 36 10″ – 120″ / 273 – 3,048 mm 80 / 160
D251-1011F 2 39 10″ – 132″ / 273 – 3,353 mm 80 / 160
* D251-1011FSS 2 39 10″ – 132″ / 273 – 3,353 mm 80 / 160
D251-1012F 2 42 10″ – 144″ / 273 – 3,658 mm 80 / 160
* D251-1012FSS 2 42 10″ – 144″ / 273 – 3,658 mm 80 / 160
D251-1014F 2 48 10″ – 168″ / 273 – 4,267 mm 80 / 160
* D251-1014FSS 2 48 10″ – 168″ / 273 – 4,267 mm 80 / 160
D251-1016F 3 54 10″ – 192″ / 273 – 4,877 mm 80 / 160
* D251-1016FSS 3 54 10″ – 192″ / 273 – 4,877 mm 80 / 160
D251-1018F 3 60 10″ – 216″ / 273 – 5,486 mm 80 / 160
* D251-1018FSS 3 60 10″ – 216″ / 273 – 5,486 mm 80 / 160
D251-1020F 3 66 10″ – 240″ / 273 – 6,096 mm 80 / 160
* D251-1020FSS 3 66 10″ – 240″ / 273 – 6,096 mm 80 / 160
* Suitable for stainless steel

 

* Calculations are based on a pipe with a tensile strength of 45,000 lbs per square inch (3,164 kg per square centimeter).
Note: All Double Chain clamps with 16 or more jackbars include a cable hoist. Smaller clamps include a level and support device

* Calculations are based on pipe with a tensile strength of 45,000 lbs per square inch (3,164 kg per square centimeter).
Note: All Double Chain clamps with 16 or more jackbars include cable hoist. Smaller clamps include level and support device

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