Width options that reduce fabrication steps. Standard widths from 25 mm up to 300 mm mean a single flat bar can often replace a fabricated assembly of narrower steel strips welded together. For tank stiffener rings, chemical‑resistant wear strips, or custom equipment spacers, this reduces fabrication steps and avoids the corrosion‑prone heat‑affected zones that welding creates in steel.
On‑site adaptability without hot work. FRP flat bar cuts with a standard circular saw or jigsaw, drills cleanly with HSS or carbide bits, and bolts into place with conventional fasteners. On a live plant floor, this commonly translates to shorter installation windows—a maintenance crew can measure, cut, drill, and mount a replacement stiffener inside a single shift without waiting for welding permits.
Corrosion resistance through the full thickness. When a coated steel flat bar gets scratched during installation, the exposed steel begins corroding immediately at that point. FRP flat bar in vinyl ester resin has no coating to breach—the entire cross‑section is generally resistant to acids, alkalis, and saltwater. This is especially relevant in immersion service inside chemical storage tanks, where the bar is constantly submerged and inaccessible for inspection. Corrosion resistance is commonly verified under ASTM D543.
Dimensional stability in wet and chemical environments. FRP flat bars generally do not swell, warp, or delaminate when continuously exposed to water or chemical solutions. For tank wall stiffeners and internal baffles that must maintain precise clearances year after year, this stability is important—a swollen or corroded steel stiffener can impose unintended stresses on the tank wall itself.
Typical applications include tank wall stiffeners and reinforcement ribs, chemical‑resistant wear strips and slide plates, equipment spacers and mounting plates, custom‑fabricated brackets and gussets, and submerged structural members in pickling baths. In each, the FRP flat bar does the same structural job without a corrosion clock ticking from the moment of installation.
Standard Dimensional Parameters
Commonly available sectional dimensions and standard stock lengths for pultruded FRP flat bars are listed below for reference. Custom cross‑sections, cut‑length orders, and project‑specific tolerances are available on request.
| Parameter | Commonly Available Specification |
|---|---|
| Width — Small Section | 25 mm, 30 mm, 40 mm |
| Thickness — Small Section | 5 mm |
| Width — Medium Section | 50 mm, 60 mm |
| Thickness — Medium Section | 6 mm, 8 mm, 10 mm |
| Width — Large Section | 80 mm, 100 mm, 120 mm |
| Thickness — Large Section | 10 mm, 12 mm, 15 mm |
| Standard Stock Length | 3 m, 6 m |
Additional widths (up to 300 mm) and thicknesses (3–25 mm) are available for custom orders. For structural design data including flexural modulus and tensile strength values, see the referenced ASTM performance figures above.
Proven in Field
"We replaced the steel stiffener rings inside our acid storage tanks with FRP flat bars. The old steel rings required annual inspection and frequent patching due to pitting corrosion. The FRP bars have been submerged in 20% sulfuric acid for over four years with no measurable thickness loss."
— Maintenance Manager, Chemical Storage Terminal
Request Flat Bar Specifications & Custom Profile Data
WayTong supplies pultruded FRP flat bars in standard widths from 25 mm to 300 mm with custom thicknesses and resin formulations. Contact our technical desk for cut‑length orders, chemical compatibility verification, and project‑specific structural data.
Request Product InformationFRP flat bars are part of the WayTong FRP Structural Profiles range, which also includes I‑beams, square tubes, round tubes, angles, channels, and solid rods. For complete mechanical and corrosion performance data, see the ASTM Standards Summary.