Steel Pipe Welding Techniques for Connecting Steel Pipes and Flanges
**Steel Pipe Welding Techniques for Connecting Steel Pipes and Flanges** ### (1) Steel Pipe Butt Welding and Splicing 1. **Steel Pipe Butt Welds** - **Between any two adjacent nodes, there must not be two splicing points in the steel pipe butt welds, and the minimum length of the connecting pipe should be greater than 800 mm.** 2. **Welder Qualification** [...]
Seamless Steel Pipe Production Process
### Seamless Steel Pipe Production Process The general production process of seamless steel pipes can be categorized into **cold drawing** and **hot rolling**. The production process of cold-rolled seamless steel pipes is generally more complex than that of hot-rolled pipes. The pipe billet first undergoes three-roll continuous rolling. After extrusion, a sizing test is performed. If there are no surface [...]
Differences Between Hot-Rolled and Cold-Rolled Seamless Steel Pipes
### Differences Between Hot-Rolled and Cold-Rolled Seamless Steel Pipes 1. **Manufacturing Process**: - **Hot-rolled seamless steel pipes** are made by heating a round billet, piercing it, and then rolling it using a three-roll skew rolling process, continuous rolling, or extrusion. After rolling, the pipe goes through sizing, cooling, straightening, hydrostatic testing (or inspection), marking, and then storage. - **Cold-rolled seamless [...]
Introduction to Common Types of Seamless Steel Pipes
### Introduction to Common Types of Seamless Steel Pipes 1. **Structural Pipes**: These normally refer to seamless steel pipes used for general structural and mechanical structures. The standard for fluid seamless steel pipes applies to seamless pipes used for conveying fluids. The main difference between fluid seamless pipes and structural seamless pipes is that the former undergoes individual hydraulic testing [...]
Working Principle and Applications of Multi-Roll Cold Rolling Pipe Mill
### Working Principle and Applications of Multi-Roll Cold Rolling Pipe Mill A **cold rolling pipe mill** is a piece of equipment used for cold rolling of hollow tubes using a ring-shaped die. This machine is particularly effective for initial rolling and for producing seamless tubes with common accuracy, including non-ferrous metals. The most notable feature of cold rolling pipe mills [...]
Company Successfully Smelts Gr60 Grade Steel
In accordance with the Chairman's directive of the "Eight Improvements" spirit, the company has been continuously increasing its efforts in the development and production of specialty steel. Recently, the company successfully smelted the new Gr60 steel billet, providing strong support for further market expansion and brand building. Gr60 grade steel is the primary material used for fasteners such as bolts [...]