Knowledge

01Aug, 2025

16. What tests do high-frequency welded steel pipes need to do?
16.1. Chemical Composition Analysis The chemical composition of high-frequency welded steel pipes has an important impact on their performance, so chemical composition analysis is
31Jul, 2025

15. How to ensure the quality of high-frequency welded steel pipes?
15.1. Raw material selection Steel strip quality: select high-quality steel with less impurities and low sulfur and phosphorus content to ensure the mechanical properties and corro
30Jul, 2025

14. How to perform quality control on high-frequency welded steel pipes?
The production process of welded pipes requires strict control of the quality of each process to ensure that the quality of the final product meets the standard requirements. Quali
29Jul, 2025

13. What are the other methods of welding?
In addition to high-frequency welding, there are arc welding and resistance welding. 13.1. What is arc welding? Arc welding is to melt the edge of the steel plate through the heat
28Jul, 2025

12. How is high-frequency welded steel pipe produced?
12.1. Raw material preparation Uncoiling: The coiled metal strip, such as steel strip, is uncoiled and sent to the production line. Strip leveling: Leveling the uncoiled strip to e
25Jul, 2025

11. What equipment is needed for the production of high-frequency welded stee...
(1) Uncoiler: Used to unfold the crimped metal strip (such as steel strip) into a straight state in preparation for subsequent processing. (2) Strip leveling machine: Level the unc
25Jul, 2025

10. What raw materials are needed for high-frequency welded steel pipes?
The main raw materials for the production of high-frequency welded round pipes are cold-rolled or hot-rolled steel plates, especially hot-rolled coils and hot-rolled strips. Accord
23Jul, 2025

9. Why do high-frequency welding? What are the characteristics of high-freque...
Efficient and fast, high welding quality, energy saving and environmental protection, easy operation, and wide range of applications. The disadvantages are high equipment cost, hig
23Jul, 2025

2. General article on high-frequency welded steel pipe manufacturing
7. What is high-frequency welded steel pipe? It is a steel pipe made by welding metal materials (mainly steel plates) together using the resistive thermal effect of high-frequency
21Jul, 2025

The second part of the welded pipe manufacturing chapter 1. Vertical cutting
1. What is longitudinal slitting? Slitting refers to the precise shearing of steel through the rotation of the cutter wheel and the movement of the movable tool holder. 2. Why do l
17Jul, 2025

Section 3 Types, specifications, characteristics and uses of steel pipes
1. According to the outer diameter of the steel pipe Capillary: 10 mm or less Small diameter tube: 10.3('/")-102(3'/")mm Medium diameter tube: 114(4")-508(20
17Jul, 2025

Third. Internationalization
Our country exported steel pipes for the first time in 1982, the export volume of that year was only 8,000 tons, by 1991 the export volume of steel pipes exceeded 100,000 tons, and

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