What is galvanized hot rolled square tubing (hollow section)?

June 28, 2021

galvanized hot rolled square tubing
Stainless steel hot rolled square tubing (hollow section), as we know, is easy to use for applications in several areas. Therefore, it is necessary that the manufacture of this material is easy to carry out and stored in order to meet the needs? Needs of your project.
In today's article, we'll talk about the different types of stainless OD tubes, you'll learn about their advantages for different industry applications.
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The OD Standard and Its Importance for Stainless OD Tubes

Before getting to know the different types and finishes of stainless OD tubes, it is necessary to contextualize for all our buyers. Moreover, we should check the OD standard and its importance in the standardization of the commercialized material.
In the stainless tube market, we have the standardization we call nominal diameter, known in the United States by the acronym NPS (Nominal Pipe Size – Nominal Pipe Size).
NPS is a set of standard sizes hot rolled square tubing (hollow section) used in the United States. Europe has its equivalent in the acronym DN (nominal diameter, from French, nominal diameter).

For what OD stands for?

OD stands for outside diameter, which in English means outside diameter. Therefore, the OD standard refers to tubes with an outer diameter, having as a standard origin the measure of 1” (inch) equivalent to 25.40 mm.
From these measurements, stainless steel OD tubes are sold according to the weight of their thickness in kilograms for each meter of the tube. When purchasing stainless OD tubes, it is important to be aware of these measurements and whether they will be in accordance with your project.

Types of stainless-steel hot rolled square tubing (hollow section) OD

In addition to their thickness, OD stainless hot-rolled square tubing is easy to classify by their applications and grades. We can do this regardless of the pressure common in their manufacture.
The finish of stainless OD tubes can be matte or glossy. The standard of the American norm? ASTM (American Society for Testing and Materials, the body that sets technical standards for a range of materials). It defines the purpose of the material used.

Stainless hot rolled square tubing  with and without seam

Another feature of stainless OD hot rolled square tubing (hollow section) is its seam. What will define whether the stainless steel tube will have a seamless or seamless finish is its manufacture.
Why hot rolled square tubing (hollow section) with seams are more accessible
Stainless steel hot rolled square tubing (hollow section) with seams is more accessible. It is due to the price and their manufactures. It has application in the:
 Agricultural
 and furniture industries.
Does the seamless steel tube become ideal for application in material pipelines that work under high pressure, such as boilers and hydraulic pistons?
Get to know the types of galvanizations and find the best method!

What are the different types of galvanizations?

Galvanizing is an extremely common process in the industrial sector, especially when it comes to the manufacture and distribution of pipes and fittings. It is a process whose focus is on improving the characteristics of galvanized items so that they have better durability.
When researching the topic, you will likely notice that there are two types of galvanizing hot rolled square tubing (hollow section): cold and hot galvanizing. With that, a question may arise: after all, what is the best type of galvanizing? Cold or hot?

Before we answer this question, it is important that we know exactly what galvanizing is, as well as knowing the characteristics of hot and cold galvanizing. In this way, it will certainly be easier to understand which type of plating is best.

What is galvanizing?

We can say that galvanizing is a coating process that consists of offering high resistance to a series of products. It can be tubes and connections, especially for use in civil and industrial segments.
The purpose of galvanizing in hot rolled square tubing (hollow section), whether cold or hot, is to provide greater protection against corrosion and oxidation. Moreover, it is good for processes that reduce the quality and useful life of the products.
Now that you know the basics of what galvanizing is, it's time to learn more about hot and cold galvanizing.
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1) Hot Galvanizing

The hot-dip galvanizing process is one of the most modern galvanizing methods, being commonly done on steel and iron parts, pipes, and fittings during their manufacture.
Also called hot-dip galvanizing, the technique consists of coating the items with a protective layer of zinc, by completely immersing the pieces in a tank.
And how exactly does hot dip galvanizing work?
Well, the item such as hot rolled square tubing (hollow section) is dipped in zinc tanks with a temperature above 45xUdHPiFHQ7xbKh19G45saF1raB2ot5pag8p1Hnk4yrfXRJZskr8TMbFpVfC5tDk8eQQg63TqkW9gKhwagx6HePTaK2yXb high heat.
As a result, zinc provides a protective layer, allowing applications in extreme environments, exposed to the elements, for example, and special projects, which demand resistance to high temperatures, contact with wearing surfaces, and corrosive materials.
When does pipe corrosion occur?

galvanized hot rolled square tubing 2021

2) Cold Galvanizing

Cold galvanizing is another way to give more strength to parts and items, however, it has some differences compared to hot galvanizing.
For example, in cold galvanizing, it is possible to coat parts with zinc, nickel, copper, brass, chrome, gold, and bronze. However, it is recurrently opted for the use of zinc, allowing the items to have properties similar to those of hot galvanizing.
In addition, cold galvanizing in hot rolled square tubing (hollow section) is done by painting the item using paints that have high amounts of the material used for coating. The process is usually done by applying a spray.


Now that you know more about the two types of galvanizing, it is easy to see that there is no one better than the other, they are just different methods, both with the same objective, however.

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