Which steel products does Allied Tube produce, and which industry specifications do you meet?

The following chart details the products manufactured by Allied Tube under the Metal Products and Services Group.

Product CategoryIndustry Specifications*
Mechanical TubeASTM A500, ASTM A513
Traffic Products (i.e., Signpost)AASHTO, MASH
*The specifications for each product category will vary on product and gauge.

What is Flo-Coat® and how is it different than batch hot-dip galvanized tubing?

Flo-Coat® is a galvanized steel tube that is produced using the in-line galvanizing process. The Flo-Coat® method employs technologies to triple coat the steel tube with the purest form of western grade zinc, clear conversion coating formula, and clear organic top coating. Flo-Coat® demonstrates synergistic performance of the conversion coating and clear organic top coating in protecting the zinc layer, which is not employed by hot-dip galvanizing.

Because of the substantial retardation of initial white rust formation due to this synergistic performance, Flo-Coat® at a minimum can last for the same period or for a longer period of exposure compared with hot-dip galvanized pipe before they exhibit the same level of corrosion failure.

The inside surface of Flo-Coat® tube is always coated with a true zinc-rich coating bearing 87% – 93% zinc dust loading by weight. The resin in these coatings is formulated with an epoxy-silicone compound that is cured at extremely high temperatures to impart an excellent coating tenacity.

Lastly, Flo-Coat® demonstrates a smooth, uniform coverage of coatings. The irregular, bumpy surface of hot-dip galvanized pipe results in a rough surface.

How does the strength of Allied’s In-line Galvanized products compare to competitive products such as pre-galvanized tube and hot-dip galvanized pipe?

Allied’s In-line Galvanized products demonstrate excellent strength characteristics, frequently superceding those of competitive products. Most products that are 15 gauge (0.072” nominal) and heavier achieve 50 ksi min. yield and 55 ksi min. tensile. The chart below demonstrates Flo-Coat® yield strength on a comparative basis.

Allied Flo-Coat®Pregalvanized (G90)Hot-Dip Galvanized (Schedule 40 Pipe)% Gain
Yield Strength50 ksi42 ksi35 ksi19 - 42%

Based on products 15 gauge and heavier

What is the difference between Flo-Coat® and Gatorshield®?

Flo-Coat® and Gatorshield® are manufactured from the same process yet yield different coating weights, benefitting different applications. Flo-Coat® is intended for applications that are either indoors or will ultimately receive a final coating of paint or powder coating. Flo-Coat® demonstrates our standard coating level of zinc at 0.30 oz./ft.2.

Gatorshield® is intended for applications that are either outdoors or are in highly corrosive conditions. Gatorshield® demonstrates a greater level of zinc at 0.60 oz./ft.2 for increased corrosion protection.

What do the coatings do for the products?

Coatings add to the life of our products by providing longer durability against normal environmental corrosion. Coatings improve the appearance of the tubing, and they prepare the tube surface for specific end uses.

What is so special about Allied’s coatings?

The technology and the process of carbon steel tube and pipe manufacturing are well known to the hundreds of manufacturers across this nation and in other countries. But what makes Allied so special is our ability to combine the following two functions with a high degree of success. Developing unique coating systems/formulations specially for Allied’s products and processes. Developing unconventional coatings application equipment and techniques to facilitate continuous on-line coating application and curing operations at high line speeds.

How many manufacturing facilities are operational for Allied Tube?

We currently have 3 manufacturing facilities and 2 fabrication facilities:


  • Harvey, IL (Headquarters)
  • Phoenix, AZ
  • DePere, WI


  • South Holland, IL
  • Kokomo, IN

Do you produce anything other than in-line galvanized mechanical tubing?

Yes. We also produce tubing products that are not coated such as HRP&O (Hot rolled pickled and oiled), Cold Rolled (CR), and pre-galvanized substrate.

HR and CR are also available as uncoated with a Qwik-Coat® lacquer topcoat (replacing standard RP oils) and optional ID coating. These OD and ID coatings benefit ERW users with added shelf life as well as surface quality for painting or powder coating.

Can I buy less-than-truckload quantities?

Yes. Allied has developed a network of stocking distributors making our product available in less-than-truckload quantities. This network of distributors is strategically located throughout the U.S. and Canada to accommodate your orders. Please visit our Rep Locator for the distributor contact nearest you.

Can I weld in-line galvanized mechanical tube?

Yes. Allied’s tube can be easily welded because we use pure 99.99% Organic zinc grade for our in-line products. Our in-line galvanized tube is applied in a controlled process on the mill achieving a smooth, even coating. This process makes it much easier to weld and reduces the amount of hazardous fume emissions in the welding process compared to hot-dip galvanized.

For more information on Welding Flo-Coat® Safely, please visit our literature library.

How is Allied Tube affiliated with Atkore International®?

Allied Tube is a company under the parent company Atkore International®. Atkore International® is the new stand alone company formed from the 51% majority share purchase from Tyco International by Clayton, Dubilier & Rice. For more information about Atkore International®, please visit www.atkore.com

Who should I contact to submit an RFQ?

You can visit our Rep Locator to locate the representative in your area that will have responsibility for your account. This representative will handle your RFQ and provide a quotation.