EN 10217-3 P275NL1, P275NL2, P355N, P355NH, P355NL Welded Steel Tubes: Alloy Fine Grain Steel Tubes For Pressure Purposes

Introduction

EN 10217-3 is a European standard that specifies the technical delivery conditions for welded steel tubes for pressure purposes. This standard specifically focuses on alloy fine grain steel tubes. The material grades covered in this standard include P275NL1, P275NL2, P355N, P355NH, and P355NL.

Material and Specification

EN 10217-3 P275NL1, P275NL2, P355N, P355NH, and P355NL are all alloy fine grain steel tubes designed for use in pressure applications. These tubes are manufactured through a welding process and are available in various dimensions and thicknesses. The standard specifies the requirements for the chemical composition, mechanical properties, and other technical aspects of these tubes.

Key Features

The key features of EN 10217-3 P275NL1, P275NL2, P355N, P355NH, and P355NL welded steel tubes include:

1. Pressure Resistance: These tubes are specifically designed to withstand high-pressure environments, making them suitable for various applications in industries such as oil and gas, petrochemical, and power generation.

2. Fine Grain Structure: The alloy fine grain steel used in these tubes offers improved toughness and impact resistance, ensuring the tubes can withstand demanding operating conditions.

3. Weldability: EN 10217-3 tubes are weldable, allowing for easy fabrication and installation. This feature makes them a preferred choice for constructing pressure vessels, boilers, and pipelines.

4. Dimensional Accuracy: The tubes conform to precise dimensional tolerances, ensuring compatibility with other components and facilitating efficient installation.

Chemical Composition

Mechanical Properties

Steel Grade and Application

EN 10217-3 P275NL1, P275NL2, P355N, P355NH, and P355NL are widely used in various industries for different applications. Some common applications include:

1. Pressure Vessels: These steel tubes are suitable for manufacturing pressure vessels used in the chemical, oil, and gas industries.

2. Boilers: EN 10217-3 tubes are used in the construction of boilers, ensuring reliable and efficient heat transfer.

3. Pipelines: These tubes are utilized in the construction of pipelines for the transportation of fluids and gases under high pressure.

Possible Alternative Grades

Depending on specific requirements and availability, alternative grades that can be considered as substitutes for EN 10217-3 P275NL1, P275NL2, P355N, P355NH, and P355NL include:

1. ASTM A333 Gr.6: This grade is commonly used for low-temperature applications and offers good impact toughness.

2. ASTM A516 Gr.70: A widely used grade for pressure vessel applications, known for its excellent strength and corrosion resistance.

3. DIN 17175 13CrMo44: This grade is suitable for high-temperature applications and offers good creep resistance.

4. ASTM A335 P11: A popular grade for seamless alloy steel pipes used in high-temperature environments.

It is important to consult the relevant standards and specifications to ensure the suitability of alternative grades for specific applications.

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