Where thee’s Pipe There’s Mathey
Mathey Dearman, Inc.
4344 South Maybelle Ave. Tulsa, OK 74107
Phone: 800-725-7311 • 918-447-1288 • Fax: 918-447-0188
Model ______________
Serial Number _______
Double Chain Clamp
Parts and Operating Manual
Shipping & Mailing Address: 4344 S. Maybelle Ave., Tulsa, OK 74107 USA
Phone: 918-447-1288 or 1-800-725-7311 Fax: 918-447-0188 Email: [email protected]
Revised: February 28, 1914
1.0 – SAFETY.
Proper safety precautions should be taken when using the D251 Double Chain Clamp as with all heavy alignment
equipment. A little common sense goes a long way towards preventing accidents involving your Mathey Dearman
Double Chain Clamp.
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The operator and maintenance person shall read and understand the Double Chain Clamp parts and operating
manual prior to attempting operation of the equipment.
The maintenance person shall read and understand the parts and operating manual prior to attempting
maintenance of the Double Chain Clamp.
Eye protection, steel toed shoes and gloves and other protective clothing shall be worn to protect the
operator when using the Double Chain Clamp.
Make sure loose clothing, tools, belts, etc. do not become entangled in the Double Chain Clamp.
The periodic maintenance instructions must be followed in the Double Chain Clamp parts and operating
manual.
Never use the Double Chain Clamp for other than its intended purpose.
Clear the general area where the Double Chain Clamp will be used of all trip hazards.
Never use the Double Chain Clamp as a ground for a plasma or welding systems
Always check the Double Chain Clamp for defects such as arc marks, abrasions and nicks and repair as needed
prior to operation.
Make sure that the Double Chain Clamp will function properly prior to attempting the alignment or reforming
of pipes or fittings.
When using the Double Chain Clamp, basic safety precautions must always be followed to reduce the risk of
personal injury.
Always operate the Double Chain Clamp in accordance with the operating instructions.
The pipe must be secured from rotation, prior to mounting the Double Chain Clamp on the pipe.
The Level and Support Device or Come-A-Long should never be used as the sole support of the pipe, fitting or
valve.
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Make sure the Double Chain Clamp is in full contact with the mating pipe, fitting or valve.
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Use only the wrench provided with the Double Chain Clamp.
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The supplied wrench is not designed to be used with a cheater bar.
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A pneumatic impact wrench should not be used to tighten the jackscrew on the pipe.
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Always inspect the Double Chain Clamp prior to use.
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The mating pipe, fitting or valve should not have a taper surface of more than 5 degrees at the point where
the Double Chain Clamp Jackscrew pad will contact the pipe.
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To avoid the risk of electrical shock or death keep the Double Chain Clamp as far away as possible from power
lines.
IN ADDITION TO THE ABOVE PROCEDURES, ALL SHOP, NATIONAL AND INTERNATIONAL SAFETY RULES
CONCERNING THE DOUBLE CHAIN CLAMP SHOULD BE FOLLOWED. ALL CLAMPING OPERATIONS SHOULD BE
CONDUCTED IN THE BEST OF SAFETY CONDITIONS.
2
WARNING: THE DOUBLE CHAIN CLAMP
SHOULD NEVER BE USED TO LIFT THE PIPE AS
IT MAY RESULT IN SERIOUS INJURY OR DEATH.
WARNING: THE DOUBLE CHAIN CLAMP
SHOULD NEVER BE USED AS THE ONLY
SUPPORT OF THE PIPE OR FITTING.
WARNING: THE DOUBLE CHAIN CLAMP
SHOULD NEVER BE USED AS A GROUND FOR
A WELDING POWER SOURCE
3
Table 1 – D251 Double Chain Clamp Sizes
Part Number
Pipe Clamping Range
Estimated Weight
Inches
MM
lbs
kg
D251-1036
10 – 36
254 – 914
220
100
D251-1036SS
10 – 36
254 – 914
220
100
D251-1048
10 – 48
254 – 1219
278
126
D251-1048SS
10 – 48
254 – 1219
278
126
D251-1054
10 – 54
254 – 1372
300
136
D251-1054SS
10 – 54
254 – 1372
300
136
D251-1060
10 – 60
254 – 1524
328
149
D251-1060SS
10 – 60
254 – 1524
328
149
D251-1072
10 – 72
254 – 1829
387
176
D251-1072SS
10 – 72
254 – 1829
387
176
D251-1084
10 – 84
254 – 2134
442
200
D251-1084SS
10 – 84
254 – 2134
442
200
D251-1096
10 – 96
254 – 2438
498
226
D251-1096SS
10 – 96
254 – 2438
498
226
D251-10108
10 – 108
254 – 2743
554
251
D251-10108SS
10 – 108
254 – 2743
554
251
D251-10120
10 – 120
254 – 3048
610
277
D251-10120SS
10 – 120
254 – 3048
610
277
D251-1011F
10 – 132
254 – 3353
660
299
D251-1011FSS
10 – 132
254 – 3353
660
299
D251-1012F
10 – 144
254 – 3715
710
322
D251-1012FSS
10 – 144
254 – 3715
710
322
D251-1014F
10 – 168
254 – 4267
810
367
D251-1014FSS
10 – 168
254 – 4267
810
367
D251-1016F
10 – 192
254 – 4877
910
410
D251-1016FSS
10 – 192
254 – 4877
910
410
D251-1018F
10 – 216
254 – 5486
1010
455
D251-1018FSS
10 – 216
254 – 5486
1010
455
D251-1020F
10 – 240
254 – 6096
1110
500
D251-1020FSS
10 – 240
254 – 6096
1110
500
4
Table 2 – Chain Clamp Components
Qty of
Main
Blocks
Main
Block Part
Number
Qty. of fine
Adjustment
Fine
Adjustment
Part Number
Qty of
Jackbars
Jackbar
Part
Number
Chain
Length
Chain
Part
Number
Qty of
Conn
Links
Conn
Link Part
Number
D251-1036
1
DD-100
2
DC-200
9
DD-500SS
20
DC-300
VARIES
DC-301
D251-1036SS
1
DD-100SS
2
DC-200
9
DD-500SS
20
DC-300S
VARIES
DC-301S
D251-1048
1
DD-100
2
DC-200
12
DD-500SS
26
DC-300
VARIES
DC-301
D251-1048SS
1
DD-100SS
2
DC-200
12
DD-500SS
26
DC-300S
VARIES
DC-301S
D251-1054
1
DD-100
2
DC-200
14
DD-500SS
30
DC-300
VARIES
DC-301
D251-1054SS
1
DD-100SS
2
DC-200
14
DD-500SS
30
DC-300S
VARIES
DC-301S
D251-1060
1
DD-100
2
DC-200
16
DD-500SS
33
DC-300
VARIES
DC-301
D251-1060SS
1
DD-100SS
2
DC-200
16
DD-500SS
33
DC-300S
VARIES
DC-301S
D251-1072
1
DD-100
2
DC-200
20
DD-500SS
40
DC-300
VARIES
DC-301
D251-1072SS
1
DD-100SS
2
DC-200
20
DD-500SS
40
DC-300S
VARIES
DC-301S
D251-1084
1
DD-100
2
DC-200
24
DD-500SS
46
DC-300
VARIES
DC-301
D251-1084SS
1
DD-100SS
2
DC-200
24
DD-500SS
46
DC-300S
VARIES
DC-301S
D251-1096
2
DD-100
4
DC-200
28
DD-500SS
52
DC-300
VARIES
DC-301
D251-1096SS
2
DD-100SS
4
DC-200
28
DD-500SS
52
DC-300S
VARIES
DC-301S
D251-10108
2
DD-100
4
DC-200
32
DD-500SS
59
DC-300
VARIES
DC-301
D251-10108SS
2
DD-100SS
4
DC-200
32
DD-500SS
59
DC-300S
VARIES
DC-301S
D251-10120
2
DD-100
4
DC-200
36
DD-500SS
66
DC-300
VARIES
DC-301
D251-10120SS
2
DD-100SS
4
DC-200
36
DD-500SS
66
DC-300S
VARIES
DC-301S
D251-1011F
2
DD-100
4
DC-200
39
DD-500SS
73
DC-300
VARIES
DC-301
D251-1011FSS
2
DD-100SS
4
DC-200
39
DD-500SS
73
DC-300S
VARIES
DC-301S
D251-1012F
2
DD-100
4
DC-200
42
DD-500SS
80
DC-300
VARIES
DC-301
D251-1012FSS
2
DD-100SS
4
DC-200
42
DD-500SS
80
DC-300S
VARIES
DC-301S
D251-1014F
3
DD-100
6
DC-200
48
DD-500SS
92
DC-300
VARIES
DC-301
D251-1014FSS
3
DD-100SS
6
DC-200
48
DD-500SS
92
DC-300S
VARIES
DC-301S
D251-1016F
3
DD-100
6
DC-200
54
DD-500SS
106
DC-300
VARIES
DC-301
D251-1016FSS
3
DD-100SS
6
DC-200
54
DD-500SS
106
DC-300S
VARIES
DC-301S
D251-1018F
3
DD-100
6
DC-200
60
DD-500SS
120
DC-300
VARIES
DC-301
D251-1018FSS
3
DD-100SS
6
DC-200
60
DD-500SS
120
DC-300S
VARIES
DC-301S
D251-1020F
3
DD-100
6
DC-200
66
DD-500SS
128
DC-300
VARIES
DC-301
D251-1020FSS
3
DD-100SS
6
DC-200
66
DD-500SS
128
DC-300S
VARIES
DC-301S
Part Number
5
Figure 1 – JACKBAR ASSEMBLY
Description
Complete
Jackbar Ass’y
Jackbar
Jackscrew
Thumbscrew
Chain Lock
Part Number
DD-500SS
DD-500C
DC-501
22-38TS-114
DB-507
Item Number
1
2
3
4
5
Qty.
1
1
2
2
2
Figure 2 – MAIN BLOCK – Part number: DD-100
Main Block
Spring
Chain
Dog
Chain Dog
Retainer
Chain
Lock
5/8”-11 SHCS
5/8”- 11
Lock Nut
Jackscre
w
DD-100
DB-103
DC-102
DC-120
DC-131
11-58C0-312
1l-58C0-000
DC-501
Item
1
2
3
4
5
6
7
QTY.
2
2
2
2
2
2
1
6
Figure 3 – FINE ADJUSTMENT – Part Number: DC-200
Model
Crank
Housing
Piston
Crank
Handle
Stud
(Not Shown)
Collar
(Not Shown)
Flat Washer
Item
C1
C2
C3
C4
C6
C7
DC-200
DC-201
DC-202
DC-205
DC-202
12-0100-F00
DC-203
Figure 4 – CHAIN END
Item
Description
Chain*
Part Number
Qty.
DC-300
Varies
F
Shaft Collar
01-0185-004
4
G
Lock Nut
1L-38C0-000
2
E
SHCS, 3/8-16 x 2 1/2 lg.
11-38C0-212
2
7
GENERAL
The Double Chain Clamp is heavy-duty vessel clamp designed for the alignment large diameter having wall
thickness no greater than schedule 120. The Double Chain Clamp will reform schedule 80 pipe and vessels
having a tensile strength up to 45,000psi (310megapascal). The extra heavy-duty Jackbars and Main Block
provide the brute strength to accomplish almost any reforming job. Models of the Clamp are available to align
and reform pipe or vessels up to 20 foot (6 meters) in diameter.
The 10” to 84” Double Chain Clamp and larger will have multiple Main Block Assemblies, dependent on the
clamps pipe clamping range. Multiple Main Blocks and Fine Adjustments are included with large pipe or
vessels Clamps to enable the operator to remove the slack in sections of the chain (Table-2). The use of
multiple Main Blocks and Fine Adjustments greatly aids in the installation, application and function of the
clamp.
A. Installing the Clamp on Pipe without Cable Puller
1.
Lay out the clamp on the floor or table with Jackscrews (Figure 1) facing downward. Make sure all
Jackscrews are lightly touching the floor and the Jackbars are not elevated. (See Figure 5)
Figure 5
WARNING: Due to the weight of the Double Chain Clamp, precaution should be taken
when lifting the clamp to avoid injuries to the back, hands and feet.
The Double Chain Clamp will have 1 or more Double Main Blocks (Figure 2) containing 2 or more Chain
Dogs, Chain Dog Retainers and chain Locks. A Jackbar protrudes out of one side of the Main Block to
assist with the alignment and reforming processes. The attachment point of the Main Block (Figure 2) is
used as an attachment point for the hook of a Cable Puller or crane. The Main Block and all parts
attached to the Main Block are made from carbon steel. A 3/16” x 3/16” stainless steel square bar is
welded to the bottom of the Main Block for stainless steel and specialty alloy applications. The parts of
the Jackbar that contact the pipe are made of stainless steel.
2.
Evenly space the Jackbars (Figure 1) along the Chain as shown in Figure 5 and tighten both Chain Locks
(Figure 1 Item 5) with the Thumbscrews (Figure 1 item 4) located on the Jackbar (See Figure 1) to secure
the Jackbars in position on the Chain. Adjust all Jackscrews (Figure 1 item 3) to make sure they are lightly
touching the floor and the Jackbar (Figure 1) is not elevated. (See Figure 5)
WARNING: If the Thumbscrews do not adequately tightened the Chain Lock against the
Chain, the Jackbar will slip on the chain resulting serious injury or loss of a body member.
3.
Take the Chain Dog Retainers (Figure 2 Item 3) and Chain Locks (Figure 2 Item 4) that are located on both
WARNING: When spacing the Jackbars, use caution to not to place hands or fingers
side of the Main Block out of the support holes and leave dangling from the Main Block until it is time to
under jackbar or where the chain enters and leaves the Jackbar as it may cause serious
lock the Chain in position.
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4.
With an overhead crane lower the clamp over each side of the pipe. If crane is not available or there is
not enough clearance above the pipe, pull the clamp over the pipe
5.
NOTE: Instructions for making a “spread bar” to assist in lowering the clamp on the pipe or vessel with a
crane is located in the back of this manual.
WARNING: When using a crane do not stand under the Double Chain Clamp as it
may disengaged from the crane resulting in serious injury or death.
WARNING: To avoid injury some method should be used to maintain the clamp on
the pipe to avoid serious injury to the operator
5.
Fit the clamp on pipe so the Jackscrew (Figure 1 Item 3) of the Jackbar
(Figure 1 Item 1) protrudes past the pipe end approximately 1” (25mm).
6.
Adjust the clamp so the Main Block (Figure 2) is at a convenient height
(Waist high for most persons) to lift the Fine Adjustment, Chain and Jackbars.
WARNING: To avoid a back injury, do the appropriate
exercises to stretch your back prior to lifting the fine
adjustments.
7.
Figure 6
Place the ears of the Fine Adjustments (Figure 5) into the notches of the
Main Block. See Figure 6
WARNING: Do not place hands under Jackbar or Chain as
it will result in serious injury.
8.
Install the Chain Locks (Figure 2 Item 4) into the large hole in the
Main Block (Figure 2), over the chain into the inner hole in the Main Block
See Figure 7
Figure 7
WARNING: Failure to install the Chain Locks may cause the Fine Adjustment to
become separated from the Main Block causing serious injury or death.
9.
Pull both Chains through the Chain Dogs (Figure 2 Item 2) of the Main Block
until both chains are tight against the side of the pipe or vessel. The lengths
of each chain should be even with each other. See Figure 8
Figure 8
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10. Install Chain Dog Retainers (Figure 2 Item 3) back into the hole in the
Main Block slots. (See Figure 9)
Figure 9
11. Move the 2nd section of the pipe forward until pipe rest on the Jackscrews (Figure 1 Item 3) of the Jackbar
Assembly. If too much HI-LO exists, it may be necessary to remove some of the out-of-roundness of the
mating pipe to fit the pipe in the clamp. When aligning fabricated out-of-round pipes or shells, it may be
necessary to place a brace, about 1” (25mm) smaller than the inside diameter, into the shell to remove a
majority of the out-of- round condition). The brace(s) can be easily removed after the fit-up is complete.
WARNING: Do not place body, hands or feet under pipe or fitting being placed in
clamp as it may result in serious injury or death.
NOTE: It will never be necessary to tighten all Jackscrews (Figure 1 Item 3). Tighten only those Jackscrews
(Figure 1 Item 3) where the HIGHS between the 2 pipes exist. When adjusting the pipe diameters to
match up to each other with the Jackscrews, it may be necessary to loosen some Jackscrews (Figure 1 Item
3) opposite those that were tightened previously.
NOTE: Do not attempt to adjust all Jackscrews at the same to time to remove the high points.
12. Tighten each Jackscrew (Figure 1 Item 3) a little at a time. Go around the Vessel as many times as
necessary until you have a good fit-up.
Caution: Do not tack weld the vessels before a good fit-up is achieved all the way around the vessel.
13. When possible, completely weld the weld joint on inside of the vessel before removing the clamp. This
will eliminate the need to tack the weld joint on the outside pipe or vessel. When inside welding of the
weld joint is not possible, the Jackbars should be arranged to obtain an 80% completed weld joint on the
outside of the vessel prior to removing the clamp.
14. Raise the jackscrews above the surface of the vessel surface before removing the clamp.
WARNING: Failure to make sure the clamp is cool prior to removal of the clamp, may
result in serious injury.
15. Reverse the procedure used to install the clamp to remove the clamp.
C. Mounting Instructions using a Cable Puller (Come-A-Long)
Figure 10: Cable Puller Detail
10
Figure 11
1.
With the Dearman Double Chain Clamp resting over the pipe, wrap the chains just above one of Jackbars
with a strap. Attach 1 of the 2 hooks (Figure 10 Items A & B) of the Heavy-Duty Cable Puller to the strap
that is attached just above one of the Jackbars. Bring the strap attached Cable of the Cable Puller to
center between the 2 Jackscrews.
Figure 12
2.
Place the Hook (Figure 10 Item A) on the end of the Cable Puller attachment point in the center of the Main
Block. (see Figure 2)
Figure 13
3.
Ratchet the handle (C) of Cable Puller (see Figure 10) to move the Main Block (Figure 2) into position on the
pipe. (See Figure 2 below & Figure 12)
WARNING: Keep hands, finger and arm from under Chain and Jackbars when ratcheting
the Cable Puller as it may result in serious injury.
11
Figure 14
4. Place the ears of the Fine Adjustment (Figure 3) into the notches of the Main Block. (As Illustrated in Figure 6)
5. Pull the excess chain through the Chain Dog (Figure 2 Item 2) and put the Chain Lock (Figure 2 Item 3) of the
Main Block. Both Chains should be as close to the same length as possible. (As illustrated in Figure 8)
6. Install the Chain Dog Retainers (Figure 2 Item 3). (Installation shown in Figure 9)
7. The Cable Puller is now ready for removal.
Figure 15
8.
Move Latch (Figure 10 Item D) of the Cable Puller to the down position. Pull back on the latch (Figure 10 Item
E) of the cable puller and with the other hand pull the cable downward to obtain slack in the cable. (See
Figure 10)
Figure 16
9.
Unhook Hook (Figure 10 Item A or B) of Cable Puller from attachment point of the Main Block (Figure 10
Item B).
10. Remove hook (Figure 10 Item A or B) from the Double Chains of the Clamp.
12
11. If a Hi-Lo of more than 1” (25mm) exists, it will be necessary to remove some of the out-of-roundness of
the pipe in order fit the pipe into the clamp. When aligning fabricated shells with an out of round
condition, a brace about 1” (25mm) smaller than the inside diameter can be inserted into the shell to
remove some of the out of round condition). The brace can be easily removed after making the fit-up.
WARNING: Before attempting step 10, the process for removing the out of round
condition should be discussed with the appropriate safety personnel due to the risk the
personal injury.
12.
Move the fitting or other section of the pipe forward until pipe rest on the Jackscrews (Figure 1 Item 3).
NOTE: Tighten only those jackscrews (Figure 1 Item 3) where the HIGHS exist. It may be necessary to
loosen some jackscrews that were tightened previously when adjusting the pipe diameters to match.
WARNING: Due to the risk of severe injury and death, hand, fingers or other
extremities should not be placed between the 2 pipes or pipe and fitting being
moved into clamp.
NOTE: Do not attempt to adjust all Jackscrews at the same to time to remove the high points.
13.
Tighten only the 2 Jackscrews (Figure 1 Item 3) over the high spot and 2 jackscrews 180 degrees to the
first 2 jackscrews a little at a time Tighten 4 Jackscrews as many times as necessary until good fit-up is
achieved.
NOTE: Do not tack weld joint together before a good fit-up has been achieved all the way around the
vessel.
14.
When possible, weld the inside of the weld joint before removing the clamp to eliminate tacking the
outside of the weld joint. When welding the inside weld joint is not possible, Jackbars should be
arranged to weld 80% weld of the weld joint.
Note: If it is not possible to weld the inside first, it is suggested that all unrestricted areas of the weld
joint be welded before removing the clamp to help prevent cracking of the skip-welds.
15.
Before removing the clamp, raise the jackscrews about surface of the vessel surface.
WARNING: When removing the clamp, there is a risk of a severe burn, due to the
heat generated during the welding process.
16.
To remove the clamp, reverse the procedure used to install the clamp.
To loosen the Roller Chain
1.
2.
3.
4.
Rotate the Crank Handle (Figure 3 Item C1) on the Fine Adjustment (Figure 3) until the piston (Figure 3
Item C2) is at its outer most point if additional slack in the Chain is needed.
Warning: Do not extend the piston past the hole in the Fine Adjustment Housing.
Position the Fine Adjustment ears in the recess of the Main Block as shown in Figure 6.
Remove the Chain Dog Retainers (Figure 2 Item 3) from the Main Block (Figure 2) as shown in Figure 9.
Lift the Chain Dogs (Figure 2 Item 2) and pull the chains through the Main Block as shown in Figure 8.
WARNING: When lifting the Chain Dog, there is a potential risk of serious injury. The
weight of the Jackbars and chains can cause the chain to be rapidly released through
the chain bog.
13
Note: The length of the Chains protruding out of the Chain Dogs should be as even as possible.
To Tighten the Roller Chain
1.
Remove the Chain Dog retainers (Figure 2 Item 3) from Main Block (Figure 2) as shown in Figure 9.
2.
Pull the Chain through the Chain Dog (Figure 2 Item 2) to take up the slack in the Roller Chain as show in
Figure 8 keeping them as even as possible.
3.
The Chain Dog (Figure 2 Item 2) is spring-loaded to clamp the Roller Chain automatically when the
handle is released. Lift the trigger on the Chain Dog to let the chain go through the Main Block if the
chain needs to be released.
WARNING: When lifting the Chain Dog, there is a potential risk of serious injury. The
weight of the Jackbars and chains can cause the chain to be rapidly released through
the chain bog.
Note: The length of the Chains protruding out of the Chain Dogs (Figure 2 Item 2) should be as even as
possible.
4.
Replace the Chain Dog Retainers (Figure 2 Item 3).
5.
Rotate the Crank Handle of the Fine Adjustment to tension the Chain.
D. Removing the Jackbars from the Clamp
Figure 17
1.
Remove Lock Nut (Figure 4 Item G), Collar (Figure 4 Item F) and Hex Head Cap Screw (Figure 4 Item E)
from the both chain ends. Save these Items as they will be needed later. (See Figure 4)
2.
Remove the both Chain Dog Retainers (Figure 2 Item 3) if installed.
3.
Lift up the Chain Dog Handle (Figure 2 Item 2).
4.
While holding the Chain Dog Handle upward, pull the roller Chains through the bottom of the Main
Block.
5.
Remove the number of Jackbar required. See Table 2 for the number of Jackbars required for a
particular pipe or vessel diameter.
6.
Reinstall the Chain through the Main Block as illustrated in Figure 16)
7.
Reinstall Lock Nuts (Figure 4 Item G), Collars (Figure 4 Item F) and Hex Head Cap Screws (Figure 4 Item E)
on the end of the chains.
14
E. Double Chain Clamp Spreader bar design
Figure 18:
Approximate dimensions of the spreader bar cable for use on 15’ diameter vessel:
center cable 2’ long, end cables 9’6” long. When hooking to the clamp, space hook at 11’7” from center of hook.
F. Maintenance
1.
All Jackscrews should be inspected after each clamping operation for splatter and other foreign debris.
Any slag, splatter and other foreign debris should be removed prior to the next clamping operation.
2.
Check all Jackscrews for damaged threads. If the threads are damaged, they should be filed smooth so
that the Jackscrew will rotate smoothly in and out of the Jackscrew Nut.
3.
If play between the threaded hole and the Jackscrew exceeds .020” (.5mm) the Jackscrew and/or Jackbar
should be replaced.
4.
When the Clamp is used daily, a Copper based Anti-seize compound should be applied to all Jackscrews
daily.
5.
Check Segments of the Chain for welding arc marks. If chain exhibits arc marks replace the chain.
WARNING: Use of any other chain that the Mathey Dearman Chain will cause the chain dog to
work improperly resulting in failure of the clamp and serious injury and possibly death.
WARNING: To avoid serious injury or death, the clamp should be inspected prior to each use
and repaired as necessary, regardless of the application.
G. Warranty
For warranty details see Mathey Dearman’s website at www.mathey.com
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