GOST 8734-75 20Cr Seamless Cold-Formed Steel Pipes For Oil And Gas Fluid Transmission
Introduction
GOST 8734-75 is a standard specification for seamless cold-formed steel pipes used in the transmission of oil and gas fluids. These pipes are made from 20Cr steel, which exhibits excellent mechanical properties and resistance to corrosion. This article provides an overview of the material, specification, key features, chemical composition, mechanical properties, steel grade, application, and possible alternative grades of GOST 8734-75 20Cr seamless cold-formed steel pipes.
Material and Specification
GOST 8734-75 specifies the requirements for seamless cold-formed steel pipes made from 20Cr steel. These pipes are designed for use in oil and gas fluid transmission applications. The standard covers various dimensions, tolerances, and technical requirements to ensure the quality and performance of the pipes.
Key Features
The key features of GOST 8734-75 20Cr seamless cold-formed steel pipes include:
- Seamless construction: The pipes are manufactured without any welding seams, ensuring a smooth and continuous flow of fluids.
- Cold-formed design: The cold-forming process enhances the strength and durability of the pipes, making them suitable for demanding applications.
- Corrosion resistance: The 20Cr steel used in these pipes exhibits excellent resistance to corrosion, ensuring long-term reliability in harsh environments.
- High tensile strength: The pipes possess high tensile strength, allowing them to withstand high-pressure conditions during fluid transmission.
- Good machinability: The 20Cr steel is easily machinable, facilitating the fabrication and installation of these pipes.
Chemical Composition
| Element | Chemical Composition (%) |
| Carbon (C) | 0.17 - 0.24 |
| Silicon (Si) | 0.17 - 0.37 |
| Manganese (Mn) | 0.40 - 0.70 |
| Chromium (Cr) | 0.80 - 1.10 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
Mechanical Properties
| Property | Value |
| Tensile Strength | 590 - 740 MPa |
| Yield Strength | ≥ 390 MPa |
| Elongation | ≥ 14% |
| Impact Toughness | ≥ 39 J/cm² |
| Hardness | ≤ 229 HB |
Steel Grade
The steel grade used in GOST 8734-75 20Cr seamless cold-formed steel pipes is 20Cr. This grade is widely recognized for its excellent combination of strength, toughness, and corrosion resistance, making it suitable for oil and gas fluid transmission applications.
Application
GOST 8734-75 20Cr seamless cold-formed steel pipes are primarily used in the transmission of oil and gas fluids. These pipes find application in various industries, including petroleum, natural gas, and petrochemicals. They are commonly used for pipelines, oil rigs, refineries, and other infrastructure related to fluid transmission.
Possible Alternative Grades
While GOST 8734-75 20Cr seamless cold-formed steel pipes are specifically designed for their intended applications, there are alternative grades available that may suit specific requirements. Some possible alternative grades include:
- ASTM A519 5120
- DIN 20Cr4
- JIS SCr420
- BS 527M20
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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Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
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A: Yes, we could offer the sample for free charge but need pay the cost of freight.
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GOST 8734-75 20Cr Seamless Cold-Formed Steel Pipes For For Oil And Gas Fluid Transmission Images
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