Hot Rolled Seamless Steel Pipe GB 6479 For High Pressure Fertilizer Equipment
Introduction
Hot rolled seamless steel pipes are widely used in various industries due to their high strength, durability, and resistance to high pressure. In this article, we will explore the GB 6479 standard for hot rolled seamless steel pipes used in high-pressure fertilizer equipment. We will discuss the material, specification, chemical composition, mechanical properties, steel grade, and application of these pipes.
Material
The material used for manufacturing hot rolled seamless steel pipes according to GB 6479 standard is carbon steel. Carbon steel offers excellent mechanical properties and is suitable for high-pressure applications.
Specification
The specification of hot rolled seamless steel pipes under GB 6479 standard includes the following parameters:
- Outer Diameter: The outer diameter ranges from 16mm to 168mm.
- Wall Thickness: The wall thickness varies from 2.0mm to 30mm.
- Length: The standard length is 5-12 meters, but custom lengths can be produced upon request.
Chemical Composition
The chemical composition of hot rolled seamless steel pipes must conform to the requirements specified in GB 6479. The following table presents the typical chemical composition of these pipes:
| Element | Composition (%) |
| Carbon (C) | 0.07-0.13 |
| Silicon (Si) | 0.17-0.37 |
| Manganese (Mn) | 0.35-0.65 |
| Phosphorus (P) | ≤0.030 |
| Sulfur (S) | ≤0.025 |
| Chromium (Cr) | ≤0.25 |
| Nickel (Ni) | ≤0.25 |
| Copper (Cu) | ≤0.25 |
| Molybdenum (Mo) | ≤0.10 |
Mechanical Properties
The hot rolled seamless steel pipes under GB 6479 standard exhibit excellent mechanical properties to withstand high pressure and ensure reliable performance. The following table outlines the typical mechanical properties of these pipes:
| Property | Value |
| Tensile Strength | ≥600 MPa |
| Yield Strength | ≥320 MPa |
| Elongation | ≥20% |
| Hardness (HB) | ≤197 |
| Impact Toughness | ≥27 J/cm² (at 20°C) |
Steel Grade
The steel grade specified in GB 6479 for hot rolled seamless steel pipes is 20G. This grade represents a low carbon steel with excellent weldability, high toughness, and good mechanical properties.
Application
Hot rolled seamless steel pipes conforming to GB 6479 standard and made from 20G steel grade are primarily used in high-pressure fertilizer equipment. These pipes are commonly employed in the manufacturing of urea reactors, high-pressure piping systems, and other components involved in fertilizer production. The pipes' superior strength, chemical resistance, and reliability make them ideal for handling the demanding conditions encountered in fertilizer manufacturing processes.
Haiyan Sanxin Steel Pipe Factory is a leading manufacturer of steel pipes in China. Located in a region with excellent geographical advantages, the factory is situated close to the Zhoushan Port and Ningbo Port.
Our factory covers an area of more than 25,000 square meters and has been in the steel pipe manufacturing business for 20 years. Over this period, we have accumulated a wealth of professional experience, which has helped us establish ourselves as a trusted name in the industry.
At our factory, we specialize in the production of various types of steel pipes, including stainless steel pipe, carbon steel pipe, copper pipe, steel pipe,seamless steel pipe and welded pipe. Our expertise in this field is evident from the 12 patents that we hold, which demonstrate our commitment to innovation and excellence.
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