In-Line Galvanized Steel Tubing
We are the largest distributor of Allied Tube's Gatorshield® and Flo-Coat® galvanized steel tubing with a full array of steel products available.
Two Premium Product Lines
Both Gatorshield® and Flo-Coat® deliver superior corrosion protection with the Allied in-line galvanizing process
Gatorshield®
Gatorshield® manufactured by Allied Tube & Conduit is a patented triple layer Flo-Coat® rust and corrosion resistant product which has shown itself to be the best over the long haul versus all competitive product offerings.
The zinc rich interior coating provides the inside of the tube maximum corrosion and rust protection. Inside and out…Gatorshield® is the best!
Key Features:
Triple layer Flo-Coat® rust and corrosion resistant protection
Available in round, square, and rectangular shapes
Size range: 1/2″ to 5″ O.D.
Wall thickness range: .028 to .250 (gauge)
Smooth, shiny appearance
Easily fabricated with no deformation or flaking
Custom lengths available to meet specific requirements
Quick Size Quote
Select specifications
Flo-Coat®
Flo-Coat process is the superior method of galvanizing steel tubing. It begins with flat strip steel, which is then cold-formed and electric-resistance or induction welded.
After welding, the tube receives a triple layer of protection—zinc, conversion coating, and a clear polymer top-coat—all applied in-line to assure a uniform coating. The result is a smooth, shiny end product appearance that is unmatched in terms of strength and durability.
Process Advantages:
Superior triple layer galvanizing: zinc, conversion coating, and clear polymer top-coat
Applied in-line for uniform coating coverage
Greater corrosion resistance from synergistic coating layers
Conversion coating passivates zinc to slow white rust growth
Clear top-coat seals in protection
Acts as primer for painting or powder coating
Excellent adhesion even at high baking temperatures
Quick Size Quote
Select specifications
Other Product Families
Hot-Dip Galvanized
Traditional hot-dip galvanizing process for heavy-duty outdoor applications
Pre-Galvanized
Cost-effective galvanized tubing with zinc coating applied before forming
Fence Pipe & Tube
Specialized galvanized tubing designed for chain link fence applications
Uncoated Steel
Black steel tubing for indoor applications or custom coating
The Flo-Coat® Process Inherent Advantages
Allied's in-line manufacturing process delivers superior performance across all key metrics
Superior Strength
Cold-forming and quenching process creates greater yield and tensile strength than alternatives
Complete Protection
Tube is welded prior to coating application, protecting the weld area as much as the tube body
Enhanced Corrosion Resistance
Synergism between coatings provides 5-6 times longer protection than bare substrates
Easy Welding
Welds like bare steel with 99.9% pure zinc (only 13 ppm lead vs 5000 ppm in hot-dip)
Exceptional Fabrication
Can be bent, swaged, and wall-to-wall flattened without flaking or chipping
Paint-Ready Surface
Clear coating acts as primer with no extensive pre-cleaning needed
Ready to Experience the Flo-Coat® Advantage?
Get a custom quote for your project and discover why contractors choose in-line galvanized
REQUEST YOUR QUOTEFeatured Projects
See how our in-line galvanized products perform in real-world applications
CASE STUDYMarine Dock Structure Builder
Gatorshield® In-Line Galvanized
Dock builder eliminated costly third-party hot-dip galvanizing by switching to Gatorshield® in-line galvanized tubing.
Eliminated third-party galvanizing service fees
Reduced freight costs and handling damage
Faster production turnaround time
Superior finished appearance vs hot-dip
CASE STUDYCommercial Playground Equipment
Flo-Coat® In-Line Galvanized
Playground manufacturer improved quality and reduced production time by 40% with Flo-Coat® tubing.
Easier fabrication than hot-dipped galvanized
Clear top-coat acts as powder coating primer
No adverse coating effects during welding
Reduced quality issues and production time
Common Applications
In-Line Galvanized tubing is ideal for outdoor and corrosive environments across multiple industries
Bollards & Security Posts
Heavy-duty galvanized pipe for security posts and protective barriers
Buildings & Carports
Structural galvanized tubing for metal building frameworks and canopies
Fencing & Gates
Galvanized pipe for chain link fence frameworks and gate construction
Docks & Marine
Corrosion-resistant Gatorshield® for saltwater dock and boat lift structures
Greenhouse Structures
Galvanized tubing for greenhouse frames and growing facilities
Playground Equipment
Powder-coat ready Flo-Coat® for playground and recreational equipment
Need Galvanized Tubing for Your Application?
Our team will help you select the right size, gauge, and finish for your specific needs
Need Product Specifications?
Download our comprehensive weight per foot charts for mechanical rounds and shapes
Technical Resources
Product Data & Technical Information
Powder Coating Information
Learn about powder coating over Allied's galvanized substrate for 5-6x longer corrosion protection
Welding with Flo-Coat®
Technical guide for welding Flo-Coat galvanized tubing with minimal lead oxide fumes
Weight Per Foot Charts
Complete specifications for mechanical rounds and shapes
| OD | Equiv. Sizes | Wall Thickness (Gauge) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 22 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | ||
| 0.028 | 0.035 | 0.042 | 0.049 | 0.058 | 0.065 | 0.072 | 0.083 | 0.095 | 0.109 | 0.12 | 0.134 | 0.148 | 0.165 | 0.18 | ||
| 0.5 | 0.1413 | 0.174 | 0.2056 | 0.2362 | 0.274 | 0.3023 | ||||||||||
| 0.625 | 0.1787 | 0.2207 | 0.2618 | 0.3017 | 0.3516 | 0.3891 | ||||||||||
| 0.75 | 0.2161 | 0.2675 | 0.3179 | 0.3672 | 0.4291 | 0.476 | 0.5218 | |||||||||
| 1 | 0.2909 | 0.3611 | 0.4301 | 0.4981 | 0.5841 | 0.6497 | 0.7143 | 0.8136 | ||||||||
| 1.25 | 0.4546 | 0.5424 | 0.6291 | 0.7391 | 0.8234 | 0.9067 | 1.0354 | 1.173 | 1.3295 | 1.4496 | 1.5986 | |||||
| 1.315 | 1 NPS | 0.4789 | 0.5716 | 0.6631 | 0.7794 | 0.8686 | 0.9567 | 1.0931 | 1.239 | 1.4052 | 1.5329 | 1.6917 | ||||
| 1.5 | 0.5481 | 0.6546 | 0.76 | 0.8941 | 0.9971 | 1.0991 | 1.2573 | 1.4268 | 1.6208 | 1.7703 | 1.9567 | |||||
| 1.66 | 1¼ NPS | 0.4885 | 0.608 | 0.7264 | 0.8439 | 0.9933 | 1.1083 | 1.2223 | 1.3992 | 1.5893 | 1.8072 | 1.9755 | 2.1859 | |||
| 1.9 | 1½ NPS | 0.6978 | 0.8342 | 0.9696 | 1.1421 | 1.275 | 1.407 | 1.6122 | 1.8331 | 2.0869 | 2.2834 | 2.5297 | 2.7719 | |||
| 2 | 0.7352 | 0.8791 | 1.022 | 1.2041 | 1.3445 | 1.4839 | 1.7009 | 1.9346 | 2.2034 | 2.4117 | 2.673 | 2.9301 | ||||
| 2.375 | 2 NPS | 1.0475 | 1.2184 | 1.4366 | 1.6051 | 1.7726 | 2.0336 | 2.3155 | 2.6404 | 2.8927 | 3.2101 | 3.5234 | 3.8981 | 4.2236 | ||
| 2.5 | 1.692 | 1.8688 | 2.1445 | 2.4424 | 2.786 | 3.0531 | 3.3892 | 3.7211 | 4.1186 | 4.461 | ||||||
| 2.875 | 2½ NPS | 2.1574 | 2.4773 | 2.8232 | 3.223 | 3.5341 | 3.9264 | 4.3144 | 4.78 | 5.1857 | ||||||
| 3 | 2.2536 | 2.5882 | 2.9502 | 3.3686 | 3.6945 | 4.1054 | 4.5122 | 5.0005 | 5.4262 | |||||||
| 3.5 | 3 NPS | 2.6385 | 3.0318 | 3.4579 | 3.9512 | 4.3359 | 4.8217 | 5.3033 | 5.8824 | 6.3883 | ||||||
| 4 | 3½ NPS | 3.4754 | 3.9657 | 4.5338 | 4.9773 | 5.5379 | 6.0943 | 6.7644 | 7.3504 | |||||||
| 4.5 | 4 NPS | 3.4081 | 3.9191 | 4.4735 | 5.1164 | 5.6187 | 6.2541 | 6.8854 | 7.6463 | 8.3125 | ||||||
| 5 | 4½ NPS | 4.9813 | 5.699 | 6.2601 | 6.9704 | 7.6764 | 8.5282 | 9.2746 | ||||||||
All weights are in pounds per foot. Contact us for sizes and wall thicknesses not listed.
Have Questions About Gatorshield® or Flo-Coat®?
Our sales team is ready to help you select the right galvanized tubing for your application