Steel Knowledge

Surface heat treatment of 16Mn square tube

In order to improve the surface hardness and wear resistance of 16Mn rectangular tubes, surface treatment, such as surface flame, high-frequency surface quenching, chemical heat treatment, etc. should be carried out for the rectangular tubes. Generally speaking, most of the high and medium freque... Read More

How is LSAW steel pipe made?

The longitudinal submerged arc welding pipe is produced by rolling the steel plate into a cylindrical shape and connecting the two ends together through linear welding. LSAW pipe diameters typically range from 16 inches to 80 inches (406 mm to 2032 mm). They have good resistance to high pressure ... Read More

How to remove the rust of 16Mn seamless square pipe during long-term storage?

At present, 16Mn seamless square pipe technology has been extremely mature, and there are corresponding product standards and various types of application technologies. Its application fields are also extremely wide. Due to the influence of weather and environment, the surface of 16Mn seamless sq... Read More

Do you know the production process of high frequency welded pipe?

The production process of high-frequency welded pipe mainly depends on the variety of products. A series of processes are required from raw materials to finished products. The completion of these processes requires various mechanical equipment and welding, electrical control and detection devices... Read More

Connection method of q355b square pipe

In the prior art, a two-step method is used to connect q355b rectangular tubes. First, the square tube is pressed out of the joint, and then the joint of the two tubes is connected with a docking mechanism. This requires a lot of human resources and has low R & D and production power. The te... Read More

Fabrication technology of Q355D low temperature square tube

Domestic petroleum, chemical and other energy industries need a large number of low-temperature steel to design and produce various manufacturing and storage equipment such as liquefied petroleum gas, liquid ammonia, liquid oxygen and liquid nitrogen. According to China’s 12th Five Year Pla... Read More

Why does the color of galvanized square pipe turn white?

The main component of the galvanized square pipe is zinc, which is easy to react with the oxygen in the air. What will the color of the galvanized square pipe turn white? Next, let’s explain it in detail. The galvanized products should be ventilated and dry. Zinc is amphoteric metal, which ... Read More

How to solve the corrosion problem of galvanized square pipe?

Most of the square pipes are steel pipes, and the hot-dip galvanized square pipes are coated with a layer of zinc on the surface of the steel pipes by a special process. Next, we will explain in detail how to solve the corrosion problem of the galvanized square pipes. Read More

How to remove oxide scale on large diameter square pipe?

After the square tube is heated, a layer of black oxide skin will appear, which will affect the appearance. Next, we will explain in detail how to remove the oxide skin on the large-diameter square tube. Read More

Do you know the factors that affect the outer diameter accuracy of thick walled rectangular tubes?

The outer diameter accuracy of thick walled square rectangular pipe is determined by human, and the result depends on the customer. It depends on the customer’s requirements for the outer diameter of seamless pipe, the operation and accuracy of steel pipe sizing equipment, and the steel pip... Read More

Do you want to make your products lighter and stronger than before?

By using thinner and stronger structural and cold forming steels like high-strength, advanced high-strength and ultra-high-strength steels, you can save on production costs thanks to easy bendability, cold-forming properties and surface treatment. Additional savings in welding work and filler mat... Read More

Method of removing oil on the surface of square tube

It is inevitable that the surface of the rectangular tube will be coated with oil, which will affect the quality of rust removal and phosphating. Next, we will explain the method of oil removal on the surface of the rectangular tube below. Read More
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