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Conduit & Fittings

Split Steel Conduit - Flanged Maintenance Pipe (FMP)

Flanged Maintenance Pipe (FMP) by Ironhed is an engineered two-piece split steel conduit system for protecting existing live utilities without service interruption. Unlike field-fabricated split steel—where standard pipe is torch-cut into halves that warp, misalign, and leave jagged edges—FMP is purpose-manufactured with continuous side flanges, factory-punched slotted holes every 3 inches, and close tolerances that fit together every time. FMP installs around occupied conduit using a wrench and cordless drill—no welding, no field fabrication, no couplers required on straight runs. Galloway stocks FMP from Ironhed in the sizes and wall thicknesses your utility protection projects require.

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Features

The features below cover both sides of FMP — the hand-tool fit that lets a crew case a live line without fabrication, and the load-rated casing left protecting it long-term.

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    Engineered two-piece split design

    With continuous 1-inch flanges—manufactured to factory tolerances, not cut with a torch

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    Slotted holes every 3 inches

    Allowing field cutting, assembly, and adjustment for a precise compression fit over standard IPS conduit

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    No couplers required on straight runs

    Staggered-seam assembly (10' bottom / 5' top) creates a strong, unitized casing

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    15% larger internal diameter than standard pipe

    Accommodates future conduit expansion

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    No sharp edges or burrs

    Safer handling in trench conditions compared to field-cut steel

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    Arrives job-site ready with hardware included

    No shop fabrication, no loading/unloading at a fabricator

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    H-20, E-80 Compliant

    Meets Highway H-20 and Railroad Cooper E-80 construction loading requirements

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    Range of options

    Available in black steel, galvanized, stainless steel, and aluminum

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    American-made by Ironhed LLC (Columbus, OH)

    Certified Women's Business Enterprise (WBENC)

Technical Specifications

The following specifications represent our standard stocked range. Need a custom wall thickness, specific loading calculation, or oversized casing?  Give us a call. We’ll figure it out.

Material (walls 0.188"+)

ASTM A36 Type-1 carbon steel plate—36,000 PSI yield, 58,000–80,000 PSI tensile

Material (walls 0.137"–)

A1011 CS Type B carbon steel sheet—36,000 PSI yield, 51,000 PSI tensile

Inside Diameters

1" through 48" (larger custom sizes available up to 144" as split casing)

Wall Thicknesses

0.074" (10 ga) through 0.500"; custom walls up to 1.50" available

Standard Lengths

5-foot and 10-foot sections. 20"+ diameters available in 5/10 or 10/20 ft

Finish Options

Black steel (BSP), hot-dip galvanized (GSP), stainless steel, aluminum

Galvanized Coating

ASTM A123/A123M-02 hot-dip zinc @ 2.6–4.5 mils (0.188"+ walls) | ASTM A653 sheet (0.137"– walls)

Hardware Included

Grade 5 zinc serrated flange bolt & nut in 5/16", 3/8", or 1/2" sizes depending on wall thickness

Loading Standards

Highway H-20 and Railroad Cooper E-80 construction loading requirements

Approvals

AT&T, Sprint, Verizon/MCI, Level 3, CSX, Norfolk Southern, Kiewit, Skanska, Chevron, Shell

Brands we carry

Need split steel conduit for your next build?

We stock FMP split steel conduit at Galloway locations in common sizes for immediate availability. For specialized configurations—custom wall thicknesses, specific loading calculations, oversized casing—we work directly with Ironhed to engineer solutions to your project timeline. Tell us your conduit size, loading requirements, and timeline—and if you're not sure which wall thickness fits your application, we'll help you figure it out.

At Galloway, we don’t wait for a spec sheet. Talk us through the job and we’ll make sure you get what you need.

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Talk to a local specialist

Fort Myers, FL
(239) 481-7448
Tampa, FL
(813) 443-5598
Miami, FL
(786) 378-4615
New Castle, DE
(302)-317-1502
Columbus, OH
(614) 414-0861
Greenfield, IN
(317) 947-6271
Parker, CO
(720) 683-6100
Phoenix, AZ
(623) 738-2800
Tyler, TX
(430) 341-0010
Chesapeake, VA
(757) 263-0159