Double Pipe Chain Clamp

The Mathey Dearman Double Pipe 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 Pipe 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 needed to handle 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.

• 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 Pipe 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.

* 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.