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Pipe Fitting & Fit-Up Tools

  • Stepped Pipe Wedge Small 2130 for welders, features labeled slots, B&B logo, BBPIPETOOLS.COM, perfect welding tool accessory.

    Stepped Pipe Wedge - Small (2130)

    $36.99
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  • Mathey Dearman D248 Stainless Pipefitters Square for welders, with measurement markings and conversion tables for precise layout.

    Mathey Dearman Stainless Pipefitters Square - D248

    $175.00
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  • Mechanical Flange Spreader for welding, adjustable prongs, 300 psi, black-silver tool, 2-12", precise metalwork accessory.

    Mechanical Flange Spreader - Up To 300 psi 2-12 / 51-305

    $608.32
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  • WeldingMart Stepped Pipe Wedge Large 2132—etched markings, hanging hole, precise gauge tool for welding and pipe fitters.

    Stepped Pipe Wedge - Large (2132)

    $41.99
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  • Mathey Dearman Spider Clamp Stainless Steel 400-1SS for welding pipes, scissor mechanism, expanding inside cylindrical pipe.

    Mathey Dearman Spider Clamp Stainless Steel 400 2"-6" 54-140mm - 400-1SS

    $394.00 $525.00
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  • Mathey Dearman D211 Large-Radius Marker—adjustable blue welding tool for marking 100" circles, angled lines; 3 jointed corners.

    Mathey Dearman Large-Radius Marker up to 100 inch Circle - D211

    $50.00
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  • Mathey Dearman Fit-Up Pro aluminum protractor for welding, 48 & 36in, with adjustable arm for pipe fabrication accuracy.

    Mathey Dearman Fit-Up Pro Large Aluminum Protractor - 48 & 36in / 1219 & 914mm - DK-100

    $325.00
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  • Mathey Dearman Spider Clamp 400-4SS cross-section for pipe alignment, welding tool, showing internal springs and mechanisms.

    Mathey Dearman Spider Clamp Stainless Steel 400 8"-20" 180mm - 520mm - 400-4SS

    $1,750.00 $1,995.00
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  • Stepped Pipe Wedge Medium 2131 for welding, B&B logo, size marks, storage hole—essential pipe fitting tool at WeldingMart.

    Stepped Pipe Wedge - Medium (2131)

    $39.99
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  • Mathey Dearman Fit-Up Pro Stainless Protractor DK-239 with 18" & 12" rulers for precise welding and pipefitting measurements.

    Mathey Dearman Fit-Up Pro Small Stainless Protractor - 18 & 12in / 457 & 305mm - DK-239

    $87.00
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  • Mathey Dearman Fit-Up Prod Q.C. Welder's Gauge (English) - D253E

    $56.00
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  • Mathey Dearman Fit-Up Pro Magnetic Pipe Centering Finder D206—welding tool with protractor, level, punch, strap & markings.

    Mathey Dearman Fit-Up Pro Magnetized Pipe Centering Finder w/Punch & Multi-Tool - D206

    $85.00
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  • Mathey Dearman Fit-Up Pro Pie Wedge D272 with rectangular welding spacing wedges and pipefitter testing tools, WeldingMart.

    Mathey Dearman Fit-Up Pro Pie Wedge 3 1/2"x1 1/2"x1/4" / 89x38x6.4mm - D272

    $36.00
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  • Mathey Dearman D170 Pipe Wrap, flexible welding tool for 3–22" pipes, includes packaging, perfect for measuring and alignment.

    Mathey Dearman 4"x6' / 102x1829mm - 3-22 inch Pipe Wrap - D170

    $50.00
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  • Mathey Dearman Spider Clamp 400-2SS stainless steel welding tool with scissor arms and handle, ideal pipe alignment accessory.

    Mathey Dearman Spider Clamp Stainless Steel 400 4"-8" 85-220mm - 400-2SS

    $607.00 $810.00
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  • Mathey Dearman Fit-Up Pro Pie Wedge 4"x3/4"x1/4" D274 welding tool, black metal with hole, on white background.

    Mathey Dearman Fit-Up Pro Pie Wedge 4" x 3/4" / 1/4" / 102X19 X 6.4 mm - D274

    $18.00
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  • Mathey Dearman Fit-Up Pro Spacing Wedges and steel hardness test blocks, ideal welding tools from WeldingMart for precise fit-up.

    Mathey Dearman Fit-Up Pro Spacing Wedges 3 1/2"x1 1/2"x1/4" / 89x38x6.4mm QTY. 10 - D272-BOX

    $310.00
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  • WeldingMart ASTM surface roughness comparison plates and Mathey Dearman Fit-Up Pro Spacing Wedges set on white background.

    Mathey Dearman Fit-Up Pro Spacing Wedges 4" x 3/4" / 1/4" / 102X19 X 6.4 mm QTY. 10 - D274-BOX

    $150.00
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  • Mathey Dearman 7" Pipe Wrap D187 for welders, flexible tool for accurate pipe marking and measuring in fabrication tasks.

    Mathey Dearman 7" Wide Pipe Wrap - 1' Increments - D187

    $18.00
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  • FAB KIT carrying case with Flange Alignment Bolts for welding, organized in foam, with silver latches and Flange sticker.

    FAB KIT - FAB.KIT with Flange Alignment Bolts (FAB BOLTS)

    $695.00
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  • Mathey Dearman Spider Clamp Stainless Steel 400 for pipe welding, cross-section showing scissor-jack and alignment mechanism.

    Mathey Dearman Spider Clamp Stainless Steel 400 6"-14" 120-350mm - 400-3SS

    $1,087.00 $1,450.00
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  • Mathey Dearman Spider Clamp Stainless Steel 400-1SS for welding pipes, scissor mechanism, expanding inside cylindrical pipe.

    Mathey Dearman Spider Clamp Stainless Steel 400 400mm - 900mm - 400-5SS

    $2,096.00 $2,795.00
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  • Mathey Dearman Fit-Up Pro Magnetized Torpedo Level 10" D207—welding tool with protractor, bubble levels, inclinometer, ruler.

    Mathey Dearman Fit-Up Pro Magnetized Torpedo Level & Inclinometer (10 inch) - D207

    $85.00
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  • Mathey Dearman Fit-Up Pro Protractors D271 and precision welding tools in open box for accurate fabrication measurements.

    Mathey Dearman Fit-Up Pro Protractors 8"x1 1/2"x1/4" / 203x38x6.4mm - D271

    $50.00
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  • Mathey Dearman D160 Pipe Wrap 4"x4' for welding, includes tape and instructions, fits 3-15" pipes; shown on pipe.

    Mathey Dearman 4"x4' / 102x1219mm - 3-15 inch Pipe Wraps - D160

    $31.00
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  • Hydraulic Flange Spreader 150-600 psi with metallic frame, ideal welding tool for precise pipe alignment and flange separation.

    Hydraulic Flange Spreader - 150-600 psi 12-24 / 305-610

    $1,334.83
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  • Mathey Dearman Fit-Up Pro Mini Stainless Protractor 4in (DXX-250) for precise welding angle and length measurements, arms open.

    Mathey Dearman Fit-Up Pro Mini Stainless Protractor - 4in / 102.4mm - DXX-250

    $18.00
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  • Mathey Dearman D209 Fit-Up Pro Small-Radius Marker for welding, blue tool for marking angles on pipes up to 22" diameter.

    Mathey Dearman Fit-Up Pro Small-Radius Marker up to 22 inch Circle - D209

    $31.00
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  • Mathey Dearman Fit-Up Pro Spacing Wedges D271-BOX, set of 10 for welding, pipefitting tools, shown on white background.

    Mathey Dearman Fit-Up Pro Spacing Wedges 8"x1 1/2"x1/4" / 203x38x6.4mm QTY. 10 - D271-BOX

    $450.00
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  • FAB BOLTS 1&1/8"

    FAB BOLTS 1&1/8"

    $72.84
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  • Mathey Dearman 4"x7' Pipe Wrap (D177) for welding, shown with packaging, instructions, and use on pipe for precise alignment.

    Mathey Dearman 4"x7' / 102x2134mm - 3-26 inch Pipe Wrap - D177

    $68.00
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  • Mathey Dearman 5" Pipe Wrap D185 for welding—includes measuring tool, instructions, and shows wrap in use for pipe fitting.

    Mathey Dearman 5" Wide Pipe Wrap - 1' Increment - D185

    $12.50
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  • Mathey Dearman aluminum framing square 8-12"x1/16" for precise welding, fabrication, and pipe alignment; inch markings on edges.

    Mathey Dearman Aluminum Framing Square 8-12"x1/16" / 203-305x1.6mm - D241

    $50.00
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  • FAB BOLTS 1&1/4"

    FAB BOLTS 1&1/4"

    $93.63
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  • Mathey Dearman D208 blue magnetized pocket level & inclinometer for welding, with protractor, spirit level, lanyard, WeldingMart.

    Mathey Dearman Magnetized Pocket Level & Inclinometer (2X2.5 inch) - D208

    $35.00
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  • FAB BOLTS 3/4"

    FAB BOLTS 3/4"

    $41.58
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  • Mathey Dearman D210 Medium-Radius Marker, blue adjustable welding tool, marks circles up to 50" for precise fabrication.

    Mathey Dearman Medium-Radius Marker up to 50 inch Circle - D210

    $43.00
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  • Mathey Dearman Stainless D256 8-12"x1/16" L-shaped welding square with inch markings, ideal for pipe alignment. White background.

    Mathey Dearman Stainless 8-12"x1/16" / 203-305x1.6mm - D256

    $80.00
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  • Mathey Dearman 4" Pipe Wrap (D184) with packaging, instructions, and close-up on pipe for welding alignment—WeldingMart tool.

    Mathey Dearman 4" Wide Pipe Wrap - 1' Increment - D184

    $12.50
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  • FAB BOLTS 1"

    FAB BOLTS 1"

    $62.37
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  • FAB BOLTS 7/8"

    FAB BOLTS 7/8"

    $52.05
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  • FAB BOLTS 1&3/8"

    FAB BOLTS 1&3/8"

    $114.42
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  • Mathey Dearman Fit-Up Q.C. Welder's Gauge for pipe measuring, inspection; green tool with yellow ruler. WeldingMart pack of 10.

    Mathey Dearman Fit-Up Prod Q.C. Welder's Gauge (English) QTY. 10 - D253E-BOX

    $500.00
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  • Hydraulic 2-12 / 51-305 metal cutting tool for welding, up to 300 psi; vertical housing, pointed head—flange separator.

    Hydraulic - Up To 300 psi 2-12 / 51-305

    $1,320.74
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  • Mathey Dearman 6 - 8 MEGA RIM CLAMP - D711-0608M

    6 - 8" MEGA RIM CLAMP - D711-0608M

    $5,045.09
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Pipe Fitting & Fit-Up Tools from FIT-UP Pro

Every product in this collection is from FIT-UP Pro, the Mathey Dearman fit-up and layout line. It brings together alignment clamps, flange tools and wedges with the layout and marking tools pipefitters use to set up a joint.

Alignment clamps

The Series 400 spider clamp has two independent expanding clamps, so two parts of different diameters can be aligned independently, for example a flange to a pipe. FIT-UP Pro says the model is specially suited for heavy parts, lists it for 2–36 in pipe and makes all locating rails from stainless steel.

Flange spreaders and alignment bolts

Manual and hydraulic flange spreaders separate flanges safely for maintenance and re-fit. FAB flange alignment bolts are used in pairs; the tapered shaft lines up misaligned bolt holes without hammers or wedges. The FAB kit and single sizes from 3/4 in to 1-3/8 in are listed here.

Wedges

FIT-UP Pro lists stepped wedges among the alignment tools that streamline precision work. Small, medium and large stepped wedges are listed here, along with pie wedges and spacing wedges sold in boxes of 10. FIT-UP Pro says its spacing wedges create precise weld gaps for accurate, repeatable pipe fit-ups.

Layout and marking

This collection also includes pipe wraps, radius markers, protractors, squares, levels and the centering head. To see only that group, go to Pipe Layout & Marking Tools.

Frequently Asked Questions

What's included in a typical pipe fit-up tool set for a pipeliner?
A pipeliner's fit-up kit typically includes: external chain-type pipe lineup clamps (to pull two pipe ends together), pipe lining bars (leverage tools to push or pull the pipe into position), a pipe jack or skid, a root gap gauge and hi-lo gauge (to verify joint mismatch and root opening to spec), center punches for tack weld placement, and pipe-specific framing squares.
What is a 'hi-lo' gauge and when do I use it?
A hi-lo gauge measures the wall mismatch (offset) between two pipe ends at the joint — the 'high' and 'low' sides of the two pipe walls as they meet. Most welding codes (ASME B31.3, API 1104, ASME Section IX) set a maximum allowable hi-lo of 1/16 in (1.6 mm) for standard pipe joints; exceeding this without documented engineering exception can cause rejection. Check hi-lo around the full circumference — not just at one point — because ovalised pipe or a tilted cut can create hi-lo that varies around the joint.
How do I set the correct root opening gap before tacking?
The root gap is set per your approved WPS (Welding Procedure Specification) — typically 1/16 in to 3/32 in for E6010 open-root stick passes, or 0 to 1/8 in for GTAW root passes depending on the process, wall thickness, and bevel geometry. Use a flat root gap gauge (a feeler-gauge style tool in the correct thickness) inserted into the joint to set the gap uniformly. After tacking, verify the gap hasn't closed — thermal contraction from tack welds can pull joints shut, especially on thin wall.
What's the right way to use a chain-type external lineup clamp on heavy-wall pipe?
Wrap the chain around both pipe ends spanning the joint, engage the locking dogs or cam mechanisms, then apply tension using the integrated ratchet or hydraulic ram to draw the pipe ends together. The clamp equalizes the OD alignment around the circumference. Tack weld in at least 4 equally spaced positions (clock positions) before releasing the clamp — releasing too soon lets the joint spring back. On heavy wall above about schedule 80 or wall thickness over 3/4 in, a hydraulic chain clamp provides significantly more clamping force than a mechanical ratchet type.
Should I leave fit-up clamps in place during the root pass or remove them after tacking?
This depends on the tool and the joint design. Most external chain clamps are removed after the pipe is tacked in at least 4 clock positions, because the clamp body blocks torch access and the tacks hold the joint geometry. Internal lineup clamps (pigs) can be left in for the root pass and then retracted or removed — this is common practice on pipeline work where the clamp moves from joint to joint via the internal string. Check your WPS or QC procedure for the specific requirement; some procedures require the clamp to remain through the entire root pass completion.
Are pipe fit-up tools from this collection compatible with Lincoln Pipeliner® filler metals?
Fit-up tools are hardware — they're compatible with any filler metal or welding process. Lincoln's Pipeliner® family of electrodes (7P+, 8P+, Arc 80 stick rods; Pipeliner 70S-6 and 80Ni1 MIG wires; NR-208-XP self-shielded wire) are designed for pipe welding and are sold separately in the filler metals section. Good fit-up — consistent root opening, low hi-lo — directly improves the quality of any root pass regardless of filler metal.