Double Chain Clamp - D251 Series

Double Chain Clamp - D251 SeriesThe 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. Our Double Chain Clamps also align 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” come with a Level and Support Device. All other models come with a cable hoist. The Double Chain Clamp is available in steel and stainless steel versions and is shipped in a wooden crate.

FEATURES:

  • 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
  • Joints on large pipe or tube shells up to 20’ (6096 mm) in diameter can be aligned, reformed and welded without removing the clamp, saving time and improving weld quality.


Universal 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
  • Level and Support Device (D251-1060 model and larger supplied with cable hoist)
  • Jackscrew Wrench
  • Parts and Operating Manual


  • ***PRODUCT IMPROVEMENT***

    All (D251 Series) Double Chain Clamps will now come with a set of Magswitch on/off magnets to allow for more safe and efficient setup of the clamps.

Specifications

Model Number of Main Blocks Number of Jackbars Pipe Size Range in (mm) Est. Shipping Weight
D251-1036
1
9 10-36 (254-914) 220 lbs / 100 kg
D251-1036SS
1
9 10-36 (254-914) 220 lbs / 100 kg
D251-1048
1 12 10-48 (254-1219) 278 lbs / 126 kg
D251-1048SS
1 12 10-48 (254-1219) 278 lbs / 126 kg
D251-1054
1 14 10-54 (254-1372) 300 lbs / 136 kg
D251-1054SS
1 14 10-54 (254-1372) 300 lbs / 136 kg
D251-1060
1 16 10-60 (254-1524) 328 lbs / 149 kg
D251-1060SS
1 16 10-60 (254-1524) 328 lbs / 149 kg
D251-1072
1 20 10-72 (254-1829) 387 lbs / 176 kg
D251-1072SS
1 20 10-72 (254-1829) 387 lbs / 176 kg
D251-1084
1 24 10-84 (254-2134) 442 lbs / 200 kg
D251-1084SS
1 24 10-84 (254-2134) 442 lbs / 200 kg
D251-1096
2 28 10-96 (254-2438) 498 lbs / 226 kg
D251-1096SS
2 28 10-96 (254-2438) 498 lbs / 226 kg
D251-10108
2 32 10-108 (254-2743) 554 lbs / 251 kg
D251-10108SS
2 32 10-108 (254-2743) 554 lbs / 251 kg
D251-10120
2 36 10-120 (254-3048) 610 lbs / 277 kg
D251-10120SS
2 36 10-120 (254-3048) 610 lbs / 277 kg
D251-1011F
2 39 10-132 (254-3353) 660 lbs / 299 kg
D251-1011FSS
2 39 10-132 (254-3353) 660 lbs / 299 kg
D251-1012F
2 42 10-144 (254-3658) 710 lbs / 322 kg
D251-1012FSS
2 42 10-144 (254-3658) 710 lbs / 322 kg
D251-1014F
2 48 10-168 (254-4267) 810 lbs / 367 kg
D251-1014FSS
2 48 10-168 (254-4267) 810 lbs / 367 kg
D251-1016F
3 54 10-192 (254-4877) 910 lbs / 410 kg
D251-1016FSS
3 54 10-192 (254-4877) 910 lbs / 410 kg
D251-1018F
3 60 10-216 (254-5486) 1010 lbs / 455 kg
D251-1018FSS
3 60 10-216 (254-5486) 1010 lbs / 455 kg
D251-1020F
3 66 10-240 (254-6096) 1110 lbs / 500 kg
D251-1020FSS
3 66 10-240 (254-6096) 1110 lbs / 500 kg

*Calculations are based on pipe with a tensile strength of 45,000 lbs per square inch / 3,164 kg per square centimeter

SS - Indicates clamp includes stainless steel chain. All clamps equipped with stainless steel Jackbars, Jackscrews, and Main Blocks.

WARNING: DOUBLE CHAIN CLAMPS SHOULD NEVER BE USED AS THE SOLE SUPPORT FOR THE PIPE OR TO LIFT THE PIPE. DO NOT EXCEED PIPE SIZE RANGE LISTED OR USE ANY TYPE OF CHAIN OTHER THAN SUPPLIED WITHOUT FIRST CONTACTING THE MATHEY DEARMAN SALES DEPARTMENT. USE OF CHAIN NOT SUPPLIED WITH THE CLAMP BY MATHEY DEARMAN WILL VOID THE CLAMP WARRANTY.

NOTE: ALL DOUBLE CHAIN CLAMPS WITH 16 OR MORE JACKBARS INCLUDE CABLE HOIST. SMALLER CLAMPS INCLUDE LEVEL AND SUPPORT DEVICE.