Mathey Dearman D230 User manual

WHERE THERE’S PIPE, THERE’S MATHEY
Mathey Dearman Single and Double Screw
Chain Clamp Parts & Operating Manual
Revised: 1/9/2018
P. O. Box 472110, Tulsa, OK 74147-2110 USA
Toll Free: 800-725-7311
918-447-1288 Office
918-447-0188 Fax
www.mathey.com
Machine Model
___________
Serial#_____________________

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Contents
Section Page
1. Safety 3
2. General Description 4
3. Parts Lists 9
4. Adding and removing Chain and Jackbars 15
5. Initial Set-up 15
6. Pipe to Pipe Set-Up without Level and Support 17
7. Pipe to Pipe Set-Up with Level and Support 17
8. Pipe to Elbow Set-Up with Elbow facing Downward 18
9. Pipe to Cross Tee Horizontal Fit-Up 19
10. Inspection and Repair Procedures 20
11. Subcomponent Assembly Procedures 27
12. Chain Clamp Assembly Procedures 28
13. Warranty 30
14. Intended Uses 31
15. Storage 31
16. Recycling of Components 31
WARNING:
The Mathey Dearman Chain Clamp is designed for the reforming and accurate
alignment of pipe, pipe fittings, flanges and weld-on valves for welding. It is not intended to
support or lift the entire length of the pipe. Always exercise extreme caution when using this
product.

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1.0 – SAFETY
Proper precautions should be taken when using the Single and Double Jackscrew Chain Clamp as with all heavy
alignment equipment. A little common sense goes a long way towards preventing accidents involving your Mathey
Dearman Chain Clamp.
•The operator and maintenance person shall read and understand the Single and Double Jackscrew Chain Clamp
parts and operating manual prior to attempting operation of the equipment.
•The operator and maintenance person shall read and understand the parts and operating manual prior to
attempting operation or maintenance of the Single and Double Jackscrew Chain Clamp.
•Eye protection and protective clothing such as steel toed shoes and gloves shall be worn to protect the operator
when using the chain clamp.
•Make sure loose clothing, tools, belts, etc. do not become entangled on the chain clamp.
•The periodic maintenance instructions must be followed in the Chain Clamp parts and operating manual.
•Never use the Chain Clamp for other than its intended purpose.
•Clear the general area where the Chain Clamp will be used of all trip hazards.
•The Mathey Dearman Chain Clamp is not intended to support or lift the entire length of the pipe.
•Never use the chain clamp as a ground for plasma or welding systems
•Always check the chain clamp for defects such as arc marks, abrasions and nicks prior to operation.
•Make sure that the chain clamp will function properly prior to attempting the alignment or reforming of pipes or
fittings.
•The chain clamp should never be used as the sole support of the pipe or fitting.
•When using the Chain Clamp, basic safety precautions must always be followed to reduce the risk of personal
injury.
•Always operate the Chain Clamp in accordance with the operating instructions.
•The pipe must be secured to the table, pipe stand, or, prior to mounting the clamp on the pipe.
•Reforming and Alignment capacity will vary depending on pipe diameter, wall thickness, and pipe tensile
strength. If in doubt contact Mathey Dearman Inc. at [phone].
•Make sure the Main Block and the Jackbars are in full contact with the pipe before aligning or reforming the pipe.
•The Level and Support Device should never be used as the sole support of the pipe, fitting or valve.
•Make sure the Chain Clamp is in full contact with the mating pipe, fitting or valve.
•Use only the wrench provided with the clamp.
•Never use a cheater bar with the supplied wrench.
•Never use the clamp as a ground connection.
•Always inspect the Chain Clamp prior to use.
•The mating pipe, fitting or valve if having a taper surface of more than 5 degrees at the point where the pad of the
Jackscrew will contact the pipe use caution as the jackscrew pad may pop off.
IN ADDITION TO THE ABOVE PROCEDURES, ALL SHOP, NATIONAL AND MANUFACTURER’S SAFETY INSTRUCTION
CONCERNING THE CLAMPING SYSTEM SHOULD BE FOLLOWED. ALL CLAMPING OPERATIONS SHOULD BE CONDUCTED IN
THE BEST OF SAFETY CONDITIONS.

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2.0 – GENERAL DESCRIPTION
The Mathey Dearman Chain Clamp is versatile: Each clamp can be used to fit-up pipes, elbows, tees, and weld-on valves,
and is useful in many other pipefitting situations. Mathey Dearman Chain Clamps are available in Light Duty and Standard
models.
These instructions are essential to understanding how to use the Mathey Dearman Chain Clamp. If you have any questions
about setting up the clamp or an application that the clamp is to perform, contact Mathey Dearman Inc. at [phone].
We’ll be glad to help.
Single Jackscrew Chain Clamp - Aligns and forms out-of-round mating
pipe up to Schedule 40 wall thickness. If reforming is not required, a wall
thickness greater than Schedule 40 can be aligned, NOTE: The required
distance between the pipe and the bottom of the raised portion of the jackscrew
is less than the Double Jackscrew Chain Clamp and Universal Chain Clamp.
This makes it a little more difficult if you are running your root pass with a Mig
or Tig torch.
Dearman Lite Single Jackscrew Chain Clamp – Manufactured
from the same type and quality of material as the standard Dearman Single
Jackscrew Chain Clamp. The Dearman Lite Single Jackscrew Chain Clamp will
typically align pipe up to Schedule 40 wall thickness. The Dearman Lite Clamp
is capable of some limited reforming tasks (see Chart 1 for details).
Double Jackscrew Chain Clamp - Aligns and reforms out-of-round
between the mating pipe and fit-up pipe up to Schedule 40 wall thickness. This
model is recommended for use where a large amount of “Hi-Lo” exists. When
no reforming is required of the mating pipe or fit-up pipe, a wall thickness
thicker than Schedule 40 can be aligned. This is an excellent clamp to use
where full circle welding is required.
Dearman Lite Double Jackscrew Chain Clamp - can align pipe up
to Schedule 40 wall thickness. The Dearman Lite Clamp is also capable of
some reforming tasks (see Chart 1).

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Universal Chain Clamp - The “Sliding Jackbar” design of the Universal
Chain Clamp allows the Jackscrew to be positioned on either side of the weld.
This allows 100% welding and grinding without removal of the clamp. The
clamp is ideal for the alignment and reforming of pipes, elbows, tees, and
mitered joints – up to Schedule 40 pipe. It is capable of aligning pipe to
Schedule 80 if reforming is not required.
Mini-Fit - is used for fitting-up and aligning small diameter pipe. Its
lightweight and simple design makes the Mini-Fit ideal for light duty
applications, where “out-of-round” problems do not exist. The Mini-Fit is
excellent for use on conduit, copper pipe, and thin wall pipe or tubing.
Sturdi-Clamp Chain Clamp – The Sturdi-Clamp is ideal for Schedule
40 & below pipe alignment and reforming. Lighter weight than the original
Mathey Dearman Chain Clamps. The Sturdi-Clamps are quick and easy to setup
while still providing the ability to get excellent fit-ups on pipe from 1” to 36”.
Chart 1 – Dearman Single Jackscrew Chain Clamp
Model
Net Weight
Operating Range
Alignment
Reforming
Lbs/Kg.
Inches/mm
Pipe Schedule
Pipe Schedule
D230
7/3
3/4”-8/19-204
40
20
D230SS
7/3
3/4”-8/19-204
40
20
D231
21/9
1-8/25-203
80
40
D231SS
21/9
1-8/25-203
80
40
D231-LT
11/5
1-12/25-305
40
20
D231-SC
10/4.5
1-12/25-305
40
20
D231-SCSS
10/4.5
1-12/25-305
40
20
D232
43/19
4-16/102-406
80
40
D232SS
43/19
4-16/102-406
80
40
D232-LT
24/11
4-20/102-508
40
20
D232-LTSS
24/11
4-20/102-508
40
20
D233
108/49
10-36/254-914
80
40
D233SS
108/49
10-36/254-914
80
40
D233-LT
62/28
6-36/152-914
40
20
D233-LTSS
62/28
6-36/152-914
40
20
D234
170/77
10-54/254-1372
80
40
D234SS
170/77
10-54/254-1372
80
40

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Chart 2 – Dearman Double Jackscrew Chain Clamp
Model
Net Weight
Operating Range
Alignment
Pipe Schedule
Reforming
Pipe Schedule
Lbs/Kg.
Inches/mm
D250
27/12
1-8/25-203
80
40
D250-SS
27/12
1-8/25-203
80
40
D249
70/32
4-16/102-406
80
40
D249SS
70/32
4-16/102-406
80
40
D249-LT
29/13
4-20/102-508
40
20
D249-LTSS
29/13
4-20/102-508
40
20
D249-SC
31/14
4-20/102-508
40
20
D249-SCSS
31/14
4-20/102-508
40
20
D235
150/68
10-36/254-914
80
40
D235SS
150/68
10-36/254/914
80
40
D235-LT
68/31
6-36/152-914
40
20
D235-LTSS
68/31
6-36/152-914
40
20
D235-SC
75/34
6-36/152-914
40
20
D235-SCSS
75/34
6-36/152-914
40
20
D236
184/83
10-54/254-1372
80
40
D236SS
184/83
10-54/254-1372
80
40
Chart 3 –Dearman Universal Chain Clamp
Model
Net Weight
Operating Range
Alignment
Reforming
Lbs/Kg.
Inches/mm
Pipe Schedule
Pipe Schedule
D2250
27/12
1-8/25-203
40
20
D2250SS
27/12
1-8/25-203
40
20
D2249
70/32
4-16/102-406
40
20
D2249SS
70/32
4-16/102-406
40
20
D2235
145/65
10-36/254-914
40
20
D2235-SS
145/65
10-36/254-914
40
20
WARNING: The Mathey Dearman Chain Clamp is designed for the reforming and
accurate alignment of pipe, pipe fittings, flanges and weld-on valves for welding. It is
not intended to support or lift the entire length of the pipe. Always exercise extreme
caution when using this product.
WARNING: Reforming and Alignment capacity will vary depending on pipe
diameter, wall thickness, and tensile strength.
WARNING:The Mathey Dearman Chain Clamp is designed as a tool for the reforming and
accurate alignment of pipe, pipe fittings, flanges and weld-on valves for welding. It is not
intended to support or lift the entire length of the pipe. Always exercise extreme caution
when using this product.
WARNING:Reforming and Alignment capacity will vary depending on pipe diameter, wall
thickness and tensile strength.

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Chart 4 – Dearman Light Single Jackscrew Chain Clamps
Model
Net Weight
Operating Range
Alignment
Reforming
Lbs./Kg.
Inches/mm
Pipe Schedule
Pipe Schedule
D231-LT
13 / 6
1 – 12 / 25 - 305
40
20
D231-LTSS
13 / 6
1 – 12 / 25 - 305
40
20
D232-LT
31 / 14
4 – 20 / 102 - 506
40
20
D232-LTSS
31 / 14
4 – 20 / 102 - 506
40
20
D233-LT
84 / 38
6 – 36 / 152 - 914
40
20
D233-LTSS
84 / 38
6 – 36 / 152 - 914
40
20
Chart 5 – Dearman Light Double Jackscrew Chain Clamps
Model
Net Weight
Operating Range
Alignment
Reforming
Lbs./Kg.
Inches/mm
Pipe Schedule
Pipe Schedule
D249-LT
36 / 14
4 – 20 / 102 - 506
40
20
D249-LTSS
36 / 14
4 – 20 / 102 - 506
40
20
D235-LT
90 / 41
6 – 36 / 152 - 914
40
20
D235-LTSS
90 / 41
6 – 36 / 152 - 914
40
20
Chart 6 – Dearman Sturdi-Clamp Chain Clamps
Model
Net Weight
Operating Range
Alignment
Reforming
Lbs./Kg.
Inches/mm
Pipe Schedule
Pipe Schedule
D231-SC
10 / 4.5
1 – 12 / 25 - 305
40
20
D231-SCSS
10 / 4.5
1 – 12 / 25 - 305
40
20
D249-SC
31 / 14
4 – 20 / 102 - 506
40
20
D249-SCSS
31 / 14
4 – 20 / 102 - 506
40
20
D235-SC
75 / 34
6 – 36 / 152 - 914
40
20
D235-SCSS
75 / 34
6 – 36 / 152 - 914
40
20
WARNING:Under no circumstances should additional chain (Chart 4, 5, or 6) be added to the
Dearman Light Series or Sturdi-Clamp to increase its operating range without contacting
Mathey Dearman at 1-800-725-7311 or 1-918-447-1288.

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Chart 7 – Chain Clamp Subassemblies by Chain Clamp Model
Model Main Block
Qty. – 1 Jackbars
Jackbars
Quantity
Required
Fine
Adjustment
Qty. – 1
Chain
Feet of
Chain
Required
Level and
Support
Device
Qty. – 1
Connecting
Link
Required
Qty. – 1
D230
DXL-524
DXL-523
2
DXL-200
DA-300
2.7
N/A
DA-301
D230SS
DXL-524S
DXL-523S
2
DXL-200
DA-300S
2.7
N/A
DA-301S
D231
DA-100
DA-500S
3
DA-200
DA-300
2.7
DA-400
DA-301
D231SS
DA-100
DA-500S
3
DA-200
DA-300S
2.7
DA-400
DA-301S
D231-LT
DXL-524LT
DXL-523
5
DXL-200LT
DA-300
4
N/A
DA-301
D231-LTSS
DXL-524LTSS
DXL-523S
5
DXL-200LT
DA-300S
4
N/A
DA-301S
D231-SC
DXL-524SC
DXL-523
5
DXL-200SC
DA-300
4
N/A
DA-301
D231-SCSS
DXL-524SC
DXL-523S
5
DXL-200SC
DA-300S
4
N/A
DA-301S
D232
DB-100
DB-500S
7
DB-200
DB-300
5
DB-400S
DB-301
D232SS
DB-100
DB-500S
7
DB-200
DB-300S
5
DB-400S
DB-301S
D232-LT
DA-100LT
DA-500S
7
DA-200LT
DA-300
7
DA-400SLT
DA-301
D232-LTSS
DA-100LT
DA-500S
7
DA-200LT
DA-300S
7
DA-400SLT
DA-301S
D233
DC-100
DC-500S
8
DC-200
DC-300
10
DC-400
DC-301
D233SS
DC-100
DC-500S
8
DC-200
DC-300S
10
DC-400S
DC-301S
D233-LT
DB-100LT
DB-500S
10
DB-200LT
DB-300
10
DB-400SLT
DB-301
D233-LTSS
DB-100LT
DB-500S
10
DB-200LT
DB-300S
10
DB-400SLT
DB-301S
D234
DC-100
DC-500S
13
DC-100
DC-300
15
DC-400
DC-301
D234SS
DC-100
DC-500S
13
DC-100
DC-300S
15
DC-400S
DC-301S
D250
DA-100
DA-600S
3
DA-200
DA-300
2.7
DA-400S
DA-301
D250SS
DA-100
DA-600S
3
DA-200
DA-300S
2.7
DA-400S
DA-301S
D249
DB-100
DB-600S
7
DB-200
DB-300
5
DB-400S
DB-301
D249SS
DB-100
DB-600S
7
DB-200
DB-300S
5
DB-400S
DB-301S
D249-LT
DA-100LT
DA-600S
7
DA-200LT
DA-300
7
DA-400SLT
DA-301
D249-LTSS
DA100LT
DA-600S
7
DA-200LT
DA-300S
7
DA-400SLT
DA-301S
D249-SC
DA-100SC
DA-600S
7
DA-200SC
DA-300
7
N/A
DA-301
D249-SCSS
DA-100SC
DA-600S
7
DA-200SC
DA-300S
7
N/A
DA-301S
D235
DC-100
DC-600S
8
DC-200
DC-300
10
DC-400
DC-301
D235SS
DC-100
DC-600S
8
DC-200
DC-300S
10
DC-400S
DC-301S
D235-LT
DB-100LT
DB-600S
10
DB-200LT
DB-300
10
DB-400SLT
DB-301
D235-LTSS
DB-100LT
DB-600S
10
DB-200LT
DB-300S
10
DB-400SLT
DB-301S
D235-SC
DB-100SC
DB-600S
10
DB-200SC
DB-300
10
N/A
DB-301
D235-SCSS
DB-100SC
DB-600S
10
DB-200SC
DB-300S
10
N/A
DB-301S
D236
DC-100
DC-600S
13
DC-200
DC-300
15
DC-400
DC-301
D236SS
DC-100
DC-600S
13
DC-200
DC-300S
15
DC-400S
DC-301S
D2250
DA-100
DA-800
3
DA-200
DA-300
2.7
DA-400S
DA-301
D2250SS
DA-100
DA-800
3
DA-200
DA-300S
2.7
DA-400S
DA-301S
D2249
DB-100
DB-800
7
DB-200
DB-300
5
DB-400S
DB-301
D2249SS
DB-100
DB-800
7
DB-200
DB-300S
5
DB-400S
DB-301S
D2235 DC-100 DC-800 8 DC-200 DC-300 10 DC-400 DC-301
D2235SS
DC-100
DC-800
8
DC-200
DC-300S
10
DC-400S
DC-301S

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3.0 – PART LISTS
Chart 8 – Single and Double Jackbar
Part Number
Jackbar Casting (A1)
Chain Lock (A2)
Jackscrew* (A3)
Thumbscrew (A4)
1 req.
1 req.
See note for no. req.
1 req.
DA-500S
DA-500C
DA-507
DA-501
22-38TS-114
DB-500S
DB-500C
DB-507
DA-501
22-38TS-114
DC-500S
DC-500C
DB-507
DC-501
22-38TS-114
DA-600S
DA-600C
DA-507
DA-701
22-38TS-114
DB-600S
DB-600-C
DB-507
DA-701
22-38TS-114
DC-600S
DC-600-C
DB-507
DC-501
22-38TS-114
DXL-523
DXL-523-C
N/A
DXL-525
22-38TS-114
DXL-523S
DXL-523-C
N/A
DXL-525S
22-38TS-114
*Note:The 600 series Jackbar requires two per assembly. All others require one per assembly.
Chart 9 – Universal Jackbar
Model
Jackbar
Universal
Jackscrew
Thumb
Locking
Spring
Machine
Self-Locking
Brass
Screw
Holder
Jackbar
Screw
Plate
Screw
Nut
(AA1)
(AA2)
(AA3)
(AA4)
(AA5)
(AA6)
(AA7)
(AA8)
(AA9)
DA-800
DA-841
DB-820
DA-701
22-14TS-034
DA-842
DA-845
14-01C0-114
1L-01C0-000
DA-846
DB-800
DB-841
DB-820
DA-701
22-14TS-034
DB-842
DA-845
14-01C0-114
1L-01C0-000
DA-846
DC-800
DC-841
DC-820
DC-501
22-14TS-034
DB-842
DA-845
14-01C0-114
1L-01C0-000
DA-846
*Note:Two of the AA3 Jackscrews are required per assembly. All other assemblies require one Jackbar.

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Chart 10 – Main Block
Model Main
Block
Chain
Adj.
Mech.
Spring
Chain
Lock
Pin
Universal
Jackbar Jack
screw Thumb screw
Socket
Head Cap
Screw
Self-
Locking Safety Pin
(B1) (B2) (B3) (B4) (B5) (B6) (B7) (B8) Nut (B9) (B10)
DA-100
DA-101
DA-102
DA-103
DA-131
DB-820
DA-501
22-14TS-034
11-38C0-200
1L-38C0-000
N/A
DA-100LT
DA-101
DA-102
DA-103
DA-131
DB-820
DA-501
22-14TS-034
11-38C0-200
1L-38C0-000
N/A
DA-100SC
DA-101
DA-102
DA-103
DA-131
DB-820
DA-501
22-14TS-034
11-38C0-200
1L-38C0-000
N/A
DB-100
DB-101
DB-102
DB-103
DB-131
DB-820
DA-701
22-14TS-034
11-12C0-300
1L-12C0-000
N/A
DB-100LT
DB-101
DB-102
DB-103
DB-131
DB-820
DA-701
22-14TS-034
11-12C0-300
1L-12C0-000
N/A
DB-100SC
DB-101
DB-102
DB-103
DB-131
DB-820
DA-701
22-14TS-034
11-12C0-300
1L-12C0-000
N/A
DC-100
DC-101
DC-102
DB-103
DC-131
DC-820
DC-501
22-14TS-034
11-58C0-312
1L-58C0-000
DC-120
DXL-524
DXL-524-C
___
___
___
___
DXL-525
___
___
___
___
DXL-524S
DXL-524-C
___
___
___
___
DXL-525S
___
___
___
___
DXL-524SC
DXL-524-C
___
___
___
___
DXL-525
___
___
___
___
DXL-524LT DXL-524-C
___
___
___
___
DXL-525
___
___
___
___
DXL-524LTSS DXL-524-C
___
___
___
___
DXL-525S
___
___
___
___

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Chart 11 - Fine Adjustment Mechanism
Model
Crank
Housing
(C 1)
Piston
(C 2)
Crank
Handle
(C 3)
Stud
(Not Shown)
(C 4)
Flat Washer
(C 6)
Collar
(Not Shown)
(C 7)
DA-200
DA-201
DA-202
DB-426
DB-424
12-0012-F00
DB-425
DA-200LT
DA-201
DA-202
DB-426
DB-424
12-0012-F00
DB-425
DA-200SC
DA-201
DA-202
DB-426
DB-424
12-0012-F00
DB-425
DB-200
DB-201
DB-202
DC-426
DC-424
12-0058-F00
DC-425
DB-200LT
DB-201
DB-202
DC-426
DC-424
12-0058-F00
DC-425
DB-200SC
DB-201
DB-202
DC-426
DC-424
12-0058-F00
DC-425
DC-200
DC-201
DC-206
DC-205
DC-202
12-0078-F00
DC-203
DXL-200
DXL-521
DXL-522
DB-426
DXL-526
12-0012-F00
DB-425
DXL-200LT
DXL-521
DXL-522
DB-426
DXL-526
12-0012-F00
DB-425
DXL-200SC
DXL-521
DXL-522
DB-426
DXL-526
12-0012-F00
DB-425
Chart 12 – Clamp Storage Boxes
Part Number Description Chain Clamp
D862
Metal Red
Tool Box 29
1/4” x 14” x
10 1/2”
D2235, D2235SS, D233, D233SS, D234, D234SS,
D235, D235SS, D236, D236SS
D864 22” Black
Tool Box
D2249, D2249SS, D2250, D2250SS, D231, D231SS,
D231-SC, D231-SCSS, D232, D232SS, D232-LT,
D232-LTSS, D233-LT, D233-LTSS, D235-LT,
D235-LTSS, D235-SC, D235-SCSS, D249, D249SS,
D249-LT, D249-LTSS, D249-SC, D249-SCSS,
D250, D250SS

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Chart 13 – Level and Support Device
Model L&S Frame
(D 1)
Crank
Housing
(D 2)
L&S
Piston
(D 3)
Stud
(D 4)
Not
Shown
Crank
Handle
(D 5)
Chain
(D 6)
Clamp
Screw
(D 7)
Cap Screw
(D 8)
Not Shown
Flat
Washer
(D 9)
Not Shown
Collar
(D 10)
Not
Shown
Yoke
(D 11)
DA-400S
DA-402
DA-420
DA-411
DA-424
DA-426
DA-440
DA-406
10-38C0-034
12-0038-F00
DA-425
DA-408
DA-400SLT
DA-402
DA-420
DA-411
DA-424
DA-426
DA-440
DA-406
10-38C0-034
12-0038-F00
DA-425
DA-408
DA-400SSC
DA-402
DA-420
DA-411
DA-424
DA-426
DA-440
DA-406
10-38C0-034
12-0038-F00
DA-425
DA-408
DB-400S
DB-402
DA-201
DB-411
DB-424
DB-426
DB-440
DA-406
10-12C0-114
12-0012-F00
DB-425
DB-409
DB-400SLT
DB-402
DA-201
DB-411
DB-424
DB-426
DB-440
DA-406
10-12C0-114
12-0012-F00
DB-425
DB-409
DB-400SSC
DB-402
DA-201
DB-411
DB-424
DB-426
DB-440
DA-406
10-12C0-114
12-0012-F00
DB-425
DB-409
DC-400
DC-401
DB-201
DC-411
DC-424
DC-426
DC-440
DC-501
10-14C0-200
12-0058-F00
DC-425
DC-409
DC-400S DC-401 DB-201 DC-411 DC-424 DC-426 DC-440 DC-501 10-14C0-200 12-0058-F00 DC-425 DC-409
Chart 14 – Chain and Connecting Links
Chain
Connecting
Link Standard Chain Clamp
DA-300 DA-301
D2250, D230, D231, D231-LT, D231-SC, D232-LT, D249-LT,
D249-SC, D250
DA-300S DA-301S
D2250SS, D230SS, D231SS, D231-LTSS, D231-SCSS, D232-LTSS,
D249-LTSS, D249-SCSS, D250SS
DB-300 DB-301 D2249, D232, D233-LT, D235-LT, D235-SC, D249
DB-300S DB-301S D2249SS, D232SS, D233-LTSS, D235-LTSS, D235-SCSS, D249SS
DC-300 DC-301 D2235, D233, D234, D235, D236, D251 Series Clamps
DC-300S DC-301S
D2235SS, D233SS, D234SS, D235SS, D236SS,
D251- Series Stainless Clamps

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Chart 15 – Chain Stop
Chain
Chain Stop
Kit
(2-E1, E2, E3)
Spacer
(E1)
(Qty 2)
Machine Screw
or Allen Head
Screw
(E2)
Lock Nut
(E3)
DA-300 , DA-300S DA-CS-KIT DA-320 14-06C0-134 1L-06C0-000
DB-300, DB-300S DB-CS-KIT DB-320 14-01C0-212 1L-01C0-000
DC-300, DC-300S DC-CS-KIT 01-0185-004 10-38C0-234 1L-38C0-000
Chart 16 – Add-on Jackbar
Add-On
Jackbar
Jackscrew
(F1)
2 Req.
Jackbar
Holder
(F2) 2 Req.
Knurled
Nut (F3)
1 Req.
Jackbar
Sub-
Assembly
(F4)
Allen Head
Screw
(F5)
(Not Shown)
Lock Nut
(F6)
Thumbscrew
(F7)
DA-900 DA-701 DA-941 DA-945 DB-820 10-38C0-200 1L-38C0-000 22-14TS-034
DB-900 DA-701 DA-941 DA-945 DB-820 10-38C0-314 1L-38C0-000 22-14TS-034
DC-900 DC-501 DC-941 DA-945 DC-820 10-38C0-314 1L-38C0-000 22-14TS-034
Chart 17 – Chain Clamp Breaker Bar & Socket
Part Number Description Chain Clamp
D900-005 Breaker Bar ALL
DWR-100 9/16” Socket
D2249, D2249SS, D2250, D2250SS, D231, D231SS,
D232, D232SS, D232-LT, D232-LTSS, D233-LT,
D233-Ltss, D235-LT, D235-LTSS, D235-SC,
D235-SCSS, D249, D249SS, D249-LT, D249-LTSS,
D249-SC, D249-SCSS, D250, D253SS
DWR-300 3/4” Socket
D2235, D2235SS, D233, D233SS, D234, D234SS,
D235, D235SS, D236, D236SS,

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Chart 18 – Spacing Screws
Model Where Used
Bracket
Spacing
Cap Screw
Lock Nut
(E-1)
Screw (E-2)
(E-3)
(E-4)
Jackbar Spacing Screws
DA-570
DA-500S and DA-600S single or
double Jackbars when working with
carbon steel
DA-572 DA-571 10-14C0-112 1L-14C0-000
DA-570S
DA-500S and DA-600S single or
double Jackbars when working with
stainless steel
DA-572 DA-571S 10-14C0-112 1L-14C0-000
DB-570
DB-500S and DB-600S single or
double Jackbars when working with
carbon steel
DB-572 DB-571 10-14C0-200 1L-14C0-000
DB-570S
DB-500S and DB-600S single or
double Jackbars when working with
stainless steel
DB-572 DB-571S 10-14C0-200 1L-14C0-000
DC-570
DC-500S and DC-600S single or
double Jackbars when working with
carbon steel
DC-572 DB-571 10-14C0-200 1L-14C0-000
DC-570S
DC-500S and DC-600S single or
double Jackbars when working with
stainless steel
DC-572 DB-571S 10-14C0-200 1L-14C0-000
Main Block & Universal Jackbar Spacing Screws
DA-870
DA-100 Main Block and DA-800
universal Jackbars when working with
carbon steel
DA-875 DA-571 N/A N/A
DA-870S
DA-100 Main Block and DA-800
universal Jackbars when working with
stainless steel
DA-875 DA-571S N/A N/A
DB-870
DA-100LT, DA-100SC & DB-100 Main
Block and DB-800 universal Jackbars
when working with carbon steel
DB-875 DB-571 N/A N/A
DB-870S
DA-100LT, DA-100SC & DB-100 Main
Block and DB-800 universal Jackbars
when working with stainless steel
DB-875 DA-571S N/A N/A
DC-870
DB-100LT, DB-100SC & DC-100 Main
Block and DC-800 universal Jackbars
when working with carbon steel
73.1500.065 DB-571 N/A N/A
DC-870S
DB-100LT, DB-100SC & DC-100 Main
Block and DC-800 universal Jackbars
when working with stainless steel
73.1500.065 DB-571S N/A N/A
*Note: Spacing Screws are not available for the D230 series and the D231-LT series Chain Clamps.

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4.0 – ADDING AND REMOVING CHAIN AND JACKBARS
Mathey Dearman Chain Clamps can perform more than 100 types of fit-ups on a variety of pipe sizes, fittings, and are useful
in holding pipes, fittings, valves and flanges in place for welding.
4.1 Jackbars (See Chart 8) may be added or removed as required.
4.2 Remove the Chain Stop (Chart 15) located at the end of the Chain (Chart 14) opposite the Fine Adjustment
Mechanism (Chart 11).
4.3 Disengage the Chain Adjustment Mechanism (Chart 10 item B2) and remove the Chain from the Main Block (Chart
10).
4.4 Add additional Chain (Chart 14) to the Clamp by using the Chain Connecting Link (Chart 14) specified for the Clamp,
and then slide the required number of additional
Jackbars required on the Chain.
4.5 Reinsert Chain (Chart 14) through the Main Block
(Chart 10), making sure the Chain Adjustment
Mechanism (Chart 10 item B2) is in proper contact
with the Chain (Chart 14) and replace the Chain
Stop (Chart 15).
4.6 Remove Jackbars (Chart 8) in the same manner.
To determine the Chain needed for a particular task, use the following formula:
Pipe Diameter (inches) x 3.1416 ( ) = Circumference of pipe + 12”= Chain(Chart 14) Length required.
A Jackbars (Chart 8) should be added for every foot of Chain (Chart 14) that is added.
5.0 – INITIAL SET-UP OF THE CHAIN CLAMP ON THE PIPE
Set-up and operation of all Mathey Dearman Chain Clamps are virtually the same, except for a few minor changes.
5.1 Remove the Chain Clamp from its storage container. Place the Clamp on the floor or table. Place the Fine
Adjustment Assembly (Chart 11) on the right if right handed, and on left if left handed.
5.2 Determine the circumference of the pipes, fittings, or valves that is going to align or reform. Release the Chain
Adjustment Mechanism (Chart 10 item B2) and pull out enough Chain (Chart 14) to go around the pipe, fittings, or
valves that you are going to align or reform. Jackbars Assemblies (Chart 8) may need to be added or removed
depending on the diameter of pipe.
5.3 The Chain Stop (Chart 15) must be removed to add or remove Jackbars (Chart 8).
Note: For the 10 – 36” and 10 – 54” Chain Clamps it is necessary to remove the Chain Adjustment Mechanism
Safety Pin (Chart 10 item B10) from the Main Block Assembly (Chart 10) in order to pull the Chain (Chart 14)
through the Main Block.
5.4 Loosen the all Thumbscrews (Chart 8 item A-4) on the Single and Double Jackbars Assemblies (Chart 8 & 9). Place
the Jackbars Assemblies an equal distance apart along the chain (Chart 14) and retighten the Thumbscrews.
Note: For the Universal Jackbars Chain Clamp, loosen the Brass Screw (Chart 9 item AA-9), located beneath the
universal Jackbars, distribute the universal Jackbar Assemblies (Chart 9 A-2) and equal distance apart along the
chain (Chart 14) and retighten the Thumbscrews. Loosen Thumbscrew (Chart 9 item AA-4) and distribute the
Universal Jackbars (Chart 9 item AA-2) at an equal distance in the Jackbar holder (Chart 9 item AA-1).
WARNING:Under no circumstances should additional chain (Chart 14) be added to the
Dearman Lite Series Chain Clamp to increase its operating range without contacting
Mathey Dearman at

16 of 32
5.5 If necessary rotate all the Jackscrews (Chart 8 item A-3) in the Jackbars until they clear the bottom of the Surface
“A”.
5.6 Place the Chain Lock Pin (Chart 10 item B-4) over the Universal Jackbar (Chart 10 item B-5) so it does not become
trapped under the Jackbar when placing the Chain Clamp on the pipe.
Note: For the 10 – 36” and 10 – 54” Chain Clamps, place the Safety Pin (Chart 10 item B-10) and Chain Lock (Chart
10 item B4) over the Universal Jackbar so it does not become trapped under the Jackbar when placing the Chain
Clamp on the pipe.
5.7 Grasp the Main Block (Chart 10) and the Fine Adjustment Assembly (Chart 11) and wrap clamp around the pipe,
making sure all Jackscrews (Chart 8 item A-3) of the Jackbar (Chart 8) are on the pipe surface facing the area to be
welded.
Note: Universal Chain Clamp – Make sure the Brass Knurled Head Screw is facing away from the weld joint.
5.8 Place the ears of the Fine Adjustment Assembly (Chart 11) in the notch portion of
the Main Block (Chart 10) as shown in the picture at right.
5.9 Place the Chain Lock Pin (Chart 10 item B-4) into the Main Block (Chart 10) over the
Chain (Chart 14).
5.10 Grasp the Main Block (Chart 10) with your Right hand and the end of the Chain
(Chart 15) with your left hand. Pull Chain through the Main Block until all Jackbars
are as close to the pipe as possible.
5.11 Rotate the Crank Handle (Chart 11 item C-3) of the Fine Adjustment Assembly
(Chart 11) clockwise until the Chain Clamp is tight on the pipe.
5.12 Rotate the Jackscrews (Chart 8 item A3 & Chart 10 item B6) in the Jackbars (Chart 8 item A1) and Main Block
clockwise until they make contact with the pipe
5.13 Loosen the Jackscrew (Chart 10 item B6) in the Main Block on the side of the pipe that is to receive the pipe or
fitting one full turn. This distance may vary depending on the out of round condition of the pipes, fittings, or
valves that you are aligning or reforming.
5.14 Loosen enough of the Jackscrews (Chart 10 item A3) in the Jackbars (Chart 8 item A1) one full turn to receive the
Pipe or fitting or until there is adequate room to receive the mating pipe or fitting. This distance may vary
depending on the out of round condition of the pipes, fittings, or valves that you are aligning or reforming.
5.15 Rotate the Crank Handle (Chart 11 item C3) of the Fine Adjustment Assembly (Chart 11) counterclockwise until the
Chain Clamp is loose on the pipe.
5.16 Slide the Clamp out over the edge of the pipe until:
•Single Screw Chain Clamp – The Single Jackbars (Chart 8) should be placed on the pipe, fitting or valve so that
the distance between the Jackscrew (Chart 8 item A3) and the base of the Jackbars (Chart 8 item A-1) is
equal.
•Double Screw Chain Clamp – The Jackscrews (Chart 8 item A3) of the Double Jackbars Assemblies (Chart 8)
should be placed at an equal distance on either side of the weld joint.
•Universal Chain Clamp – The Universal Jackbars Assembly (Chart 9) should be placed over the weld joint so
that the distance between the Jackscrew (Chart 9 item AA-3) and the Jackbars Holder (Chart 9 item AA-1) are
equal.
Note: Distance may vary slightly depending on how much working area there is on the mating pipe, fitting or
valve.
5.17 Rotate the Crank Handle (Chart 11 item C3) of the Fine Adjustment Assembly (Chart 11) clockwise until the clamp
is as tight as possible on the pipe. Apply as much force to the Crank Handle (Chart 11 item C3) as possible without
the use of any mechanical advantage.
WARNING: Jackbars at this time should be spaced at an equal
distance around the pipe. If Jackbars are not equally spaced
around the pipe, adjust them now.

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5.18 The Clamp is now ready to accept mating pipe, fitting or valve which is the same size as the fit-up pipe,
6.0 – FIT-UP WITHOUT USE OF LEVEL AND SUPPORT DEVICE
6.1 Steps 5.1 through 5.18 must be completed before using the following procedure
6.2 Determine if inside or outside diameter is required.
Note: To check HI-LO on the inside diameter pipes, the best tool to use is the
Mathey Dearman English or Metric Q. C. Welders Gauge
6.3 Move the Pipe, fitting or valve into the Jackbars of the chain clamp.
6.4 Loosen the Thumbscrew (Chart 10 item B7) in the Main Block (Chart 10) and move
the Universal Jackscrew (Chart 10 item B5) to the side of the weld where it is
needed and retighten the Thumbscrew.
6.5 Check the fit-up pipe and the mating pipe to find the section of the two pipes which is the farthest from the pipe
centerline. Tighten the Jackscrew or Jackscrews (Chart 8 item A3) over this point until the outside or inside
diameters of the pipes are in alignment. It may be necessary to loosen the Jackscrew or Jackscrews opposite the
high point to bring the outside or inside diameters of the pipes into alignment. This process may need to be
repeated with several of the Jackbars until the correct alignment or reforming is accomplished.
6.6 The pipes are now ready for welding.
7.0 – FIT-UP WITH LEVEL AND SUPPORT DEVICE
7.1 Steps 5.1 through 5.18 must be completed before using the following procedure
7.2 Turn the Crank Handle (Chart 13 item D-5) counterclockwise of the Level and Support Device until the Level and
Support Piston (Chart 13 item D-3) extends out of the Crank Housing (Chart 13 item D-2) Piston about 1-1/2” to 2”.
WARNING: The Mathey Dearman Chain Clamp is designed as a tool for the reforming and
accurate alignment of pipe, pipe fittings, flanges and weld-on valves for welding. It is not
intended to support or lift the entire length of the pipe. Always exercise extreme caution
when using this product.
WARNING: Failure to support the pipe, fitting or valve properly will result in personal injury.
WARNING: If a solid surface appears in the opening of the Crank Housing, rotate the
Crank Handle clockwise until the solid surface can no longer be seen.

18 of 32
7.3 Place the elbow, tee or other fitting inside of the Yoke (Chart 13
item D-11) of Level and Support as shown in the adjacent picture
and tighten the Clamping Screw (Chart 13 item D-7) with the
provided wrench (Chart 17).
7.4 Mount the short pipe, elbow, tee or other fitting into the Jackbars
of the chain clamp.
7.5 Put the Chain (Chart 13 item D6) of the Level and Support
Device into the Level and Support Device Hook located on
the upper back portion of the Main Block. (Picture at left)
7.6Rotate the Crank handle (Chart 13 Item D5) clockwise or
counterclockwise until the end of the pipe makes the desired amount of
contact with the end of the mating pipe, fitting, or valve. (Picture on right)
7.7 Loosen the Thumbscrew (Chart 10 item B7) in the Main Block and move the
Universal Jackbars (Chart 10 item B5) to the other side of the weld join
where it is needed and retighten the Thumbscrew.
7.8 Rotate the Main Block Jackscrews (Chart 10 item B6) and Jackbar Jackscrews
(Chart 8 item A3) until they contact the fit-up pipe.
7.9 Check the relationship of the fit-up pipe to the main pipe to determine
which direction the fit-up pipe must be moved to obtain alignment with the
main pipe.
7.10 Tighten the Jackscrew over high point until the desired outside or inside alignment of the pipes or fittings is
achieved. It will be necessary to loosen the Jackscrew(s) opposite the high point to bring the outside or inside
diameters of the pipes into alignment. This process may need to be repeated with several of the Jackbars until the
correct alignment or reforming is accomplished.
Note:To check HI-LO on the inside diameter pipes and weld gap, the best tool to use is the Mathey Dearman Q. C.
Welders gauge. English – D253E, Metric – D253M
7.11 The pipes are now ready for welding.
8.0 – FIT-UP OF ELBOW TO PIPE WITH ELBOW FACING DOWNWARD
8.1 Steps 5.1 through 5.18 must be completed before using the following procedure.
8.2 Turn the Crank Handle (Chart 13 item D-5) counterclockwise until the Level and
Support Piston (Chart 13 item D-3) extends out of the Crank Housing (Chart 13
Item D-2) Piston about 1-1/2 to 2 inches.
8.3 Attach the Yoke (Chart 13 item D-11) of the Level and Support Frame to the back of the elbow with a Hold-Down
Clamp part number D244 or D245) as illustrated in the picture at bottom right.
8.4 Mount the elbow into the Jackbars of the Chain Clamp with the elbow facing downward.
WARNING: The Level and Support Device should never be used as the sole support of
the mating Pipe.
WARNING: If a solid surface appears in the opening of the
Crank Housing, rotate the Crank Handle clockwise until the
solid surface can no longer be seen.

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8.5 Put the Chain (Chart 13 item D-6) of the Level and Support Device into the
Level and Support Device connection located on the upper portion on the
Main Block.
8.6 Rotate the Crank handle (Chart 13 item D5) of the Level and Support device
clockwise or counterclockwise until the end of the elbow makes the desired
amount of contact with the end of the mating pipe, fitting or valve.
8.7 Loosen the Thumbscrew (Chart 10 item B7) in the Main Block and move the
Universal Jackbars (Chart 7 item B5) to the side of the weld where it is needed and retighten the Thumbscrew.
8.8 Check the fit-up pipe and the mating elbow to find the section of the two parts which is the farthest point from
pipe centerline. Tighten the Jackscrew (Chart 8 item A3) over this point until the outside or inside diameters of
the two pipes or pipe and fitting are in alignment. This process may need to be repeated with several of the
Jackbars until the correct alignment or reforming is accomplished. It will be necessary to loosen the Jackscrew(s)
opposite the high point to bring the outside or inside diameters of the pipes into alignment.
Note: To check HI-LO on the inside or outside diameter pipes, the best tool to use is the Mathey Dearman Q. C.
Welders Gauge. English – D253E Metric – D253M.
8.9 The pipe and elbow are now ready for welding.
9.0 – FIT-UP OF HORIZONTAL CROSS TEE TO PIPE
9.1 Steps 5.1 through 5.18 must be completed before using the following procedure.
9.2 Turn the Crank Handle (Chart 13 item D-5) counterclockwise until the Level and
Support Piston (Chart 13 item D-3) extends out of the Crank Housing (Chart 13
itemD-2) Piston about 1-1/2 to 2 inches.
9.3 Place the tee on its side and attach Hold-Down Clamp (D244 for pipes
2” – 16” /D245 10” – 48”) to the tee as shown at right. Place the long
portion of the Yoke (Chart 13 tem D11) of the Level and Support
Frame (Chart D-11) under the Chain of the Hold-Down Clamp and
tighten the tension adjustment on the Hold Down Clamp.
9.4 Mount the short portion of the Tee into the Jackbars of the Chain
Clamp with the Level and Support Device facing upward.
WARNING: To avoid injury the Level and Support Device should never be used as the sole
support of the mating Elbow.
WARNING: The mating pipe, fitting or valve should not have a taper surface of more than 7
degrees at the point where the pad of the Jackscrew will contact the pipe.
WARNING: If a solid surface appears in the opening of the
Crank Housing, rotate the Crank Handle clockwise until the
solid surface can no longer be seen.
WARNING: If a solid surface appears in the opening of the
Crank Housing, rotate the Crank Handle clockwise until the
solid surface can no longer be seen.

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9.5 Put the Chain (Chart 13 item D-6) of the Level and Support Device into the Level
and Support Device connection located on the upper portion on the Main Block.
9.6 Rotate the Crank handle (Chart 13 item D5) clockwise or counterclockwise until
the tee is at the desired Hi-Lo to the outside or inside diameter of the mating
pipe, fitting or valve.
9.7 Loosen the Thumbscrew (Chart 10 item B7) in the Main Block and move the
Universal Jackbars to the side of the weld where it is needed and retightened
the Thumbscrew.
9.8 Check the fit-up pipe and the mating tee to find the section of the two parts that is the farthermost point from
pipe centerline. Tighten the Jackscrew over that point until the outside or inside diameters of the pipe and Tee are
in alignment. This process may need to be repeated with several of the Jackbars until the correct alignment or
reforming is accomplished.It will be necessary to loosen the Jackscrew(s) opposite the high point to bring the
outside or inside diameters of the pipes into alignment.
Note: To check HI-LO on the inside or outside diameter pipes, the best tool to use is the Mathey Dearman Q. C.
Welders gauge. English – D253E, Metric – D253M.
9.9 The pipe and tee are now ready for welding.
10.0 – INSPECTION OF CHAIN CLAMP SUBASSEMBLIES
Equipment Required:
•Straight Edge
•Small Magnifying Glass
•Threat Gauge: 7/8 – 9NC Allen Head Cap Screw x 2” long (Used to test jackscrew thread hole in Jackbars in
DD-500, DC-500S, DC-600S and DC-820)
•Thread Gauge: 5/8 – 11NC grade 8 Allen Head Cap Screw x 2” long (Used to test jackscrew thread hole in
Jackbars in DA-500S, DB-500S, DA-820, DB-820, DA-600S and DB-600S.
•Thread Gauge: 3/8 – 16NC grade 8 Allen Head Cap Screw x 2” long (Used to test the thumbscrew hole for
Chain Lock in DD-500, DC-500S, DC-600S, DC-820, DA-500S, DB-500S, DA-820, DB-820, DA-600S and DB-600S)
•Thread Gauge: 1/4 – 20NC grade 8 Allen Head Cap Screw x 2” long (Used to test jackscrew thread hole in Main
Block)
•12” machinist’s rule
•6” dial calipers
Note: Only Grade 8 Allen Head Cap Screws should be used for the Thread Gauges, as these are most resistant to
wear and tear.
WARNING: To avoid injury the Level and Support Device should never be used as the sole
support of the mating Tee.
WARNING: The mating pipe, fitting or valve should not
have a taper surface of more than 7 degrees at the point
where the pad of the Jackscrew will contact the pipe.