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### 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 [...]

### 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 [...]

### 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 [...]

The medium-frequency hot expansion process is applied to large-diameter seamless steel pipe production. It was unprecedented in the industry at the time and not initially accepted by the domestic market. As the first to adopt this technology, the company faced significant resistance during the initial product launch and promotion. The company's chairman took an innovative approach [...]

  Introduction to Seamless Steel Pipe Standards 1. Structural seamless pipes (GB/T8162-2008) are used for general structural and mechanical purposes. 2. Fluid transport seamless steel pipes (GB/T8163-2008) are for transporting water, oil, gas, and other fluids. 3. Low and medium pressure boiler seamless steel pipes (GB3087-2008) are used for manufacturing various low and medium pressure boiler [...]

01 What is finishing? Finishing refers to a series of operations performed after product rolling to meet the final requirements of users regarding surface quality, dimensions, shape, and certain performance aspects of the product. It mainly includes flame cleaning, cooling after hot processing, cutting, straightening, physical detection of defects, grinding, marking, packaging, and other processes. 02 [...]

An ultra-long, ultra-thin seamless steel pipe forging has the following specifications: length ≥11000mm, raw pipe wall thickness ≤25mm, finished wall thickness: 15+0.50mm, outer diameter: 800+10mm. This product is widely used in the preparation of blanks for spin forming processes in certain aerospace products. The manufacturing of such ultra-long, ultra-thin, large-diameter seamless steel pipes, especially the control [...]

Tianjin Pipe Corporation (TPCO), also known as "Da Wufen" (Big Seamless), is a leading manufacturer of seamless steel pipes located in Tianjin, China. Here's a brief introduction: 1. Background: - Established as a key project during China's 8th Five-Year Plan to ensure energy security - Subsidiary of CITIC Pacific Special Steel Group 2. Achievements and Recognition: [...]

Introduction: With the development of hydraulic technology, correctly selecting, processing, and arranging hydraulic steel pipes to make hydraulic systems more energy-efficient, reliable, and long-lasting has become a research topic for hydraulic system designers. This article discusses the selection, processing, and installation of hydraulic steel pipes. Material Selection: Pipe materials should be chosen based on system pressure, [...]

Stainless steel industrial pipes play a crucial role in modern industry and architectural applications, with their excellent properties making them the material of choice in many fields. Below are the main characteristics and applications of different types of stainless steel industrial pipes: 304L Stainless Steel Industrial Pipe: Low carbon 304 steel Excellent resistance to intergranular corrosion [...]