DIN EN 10216-3 Standard and its Sub Grades

DIN EN 10216-3 Standard and its Sub-grades

DIN EN 10216-3 Standard and its Sub-grades: Usage, Varieties, Technical Information, Dimensions and Tolerances, Standards, Chemical and Mechanical Properties, Certification


In the world of carbon steel pipes, the EN 10216-3 standard plays a significant role. This standard provides specifications for seamless steel pipes used in pressure applications at high temperatures. It defines various grades that meet specific requirements based on their chemical composition and mechanical properties. This article aims to shed light on the different sub-grades within the EN 10216-3 standard, providing a general overview and detailed information about each one.

DIN EN 10216-3 Standard: Overview and Significance

The EN 10216-3 standard, titled “Seamless steel tubes for pressure purposes – Technical delivery conditions – Part 3: Alloy fine grain steel tubes,” specifies the manufacturing and testing requirements for seamless carbon steel pipes designed for high-temperature applications. These pipes are commonly used in industries such as power generation, petrochemicals, and oil and gas.

Varieties of DIN EN 10216-3 Tubes:

EN 10216-3 standard covers a wide range of steel grades and pipe sizes to meet specific requirements. The selection of the appropriate pipe grade and size depends on factors such as operating conditions, pressure, and temperature. Manufacturers produce different varieties of EN 10216-3 pipes to cater to the diverse needs of various industries.

  • P275NL1: P275NL1 is a non-alloy steel grade with low-temperature properties. It possesses good weldability and high impact strength, making it suitable for applications involving low-temperature environments.
  • P275NL2: P275NL2 is similar to P275NL1 in terms of its properties, but with slightly higher minimum yield and tensile strength values. This grade offers excellent weldability and is often used in pressure vessel manufacturing.
  • P355N: P355N is a non-alloy, elevated temperature quality steel. It has good weldability and high mechanical strength, making it ideal for applications operating at elevated temperatures.
  • P355NH: P355NH is similar to P355N but with improved high-temperature properties. This grade exhibits excellent weldability and resistance to brittle fracture, making it suitable for pressure vessels and pipelines.
  • P355NL1: P355NL1 is a low-temperature grade with enhanced impact toughness. It is used in applications requiring resistance to brittle fracture at low temperatures, such as storage tanks and cryogenic equipment.
  • P355NL2: P355NL2 is similar to P355NL1, but with higher minimum yield and tensile strength values. It offers good weldability and is commonly employed in low-temperature pressure vessel applications.

Technical Information, Dimensions, and Tolerances:

DIN EN 10216-3 standard provides detailed technical information regarding the manufacturing process, chemical composition, and mechanical properties of the tubes. It specifies dimensions, tolerances, and permissible deviations for outer diameter, wall thickness, and length, ensuring uniformity and compatibility in different applications.

DIN EN 10216-3 Standard and its Sub Grades Chemical and Mechanical Properties:

The chemical composition of EN 10216-3 pipes depends on the specific steel grade and alloying elements used. The standard defines the maximum allowable limits for various elements to ensure the desired properties. The mechanical properties of the pipes, such as yield strength, tensile strength, and elongation, are also specified to guarantee their structural integrity and performance under different operating conditions.

Certification of Compliance:

To ensure compliance with the EN 10216-3 standard and specific requirements for seamless carbon steel pipes, manufacturers can obtain certification. Certifications, such as EN 10204, provide assurance to customers and regulatory bodies regarding the quality and traceability of the pipes. Adhering to certification requirements enhances trust and confidence in the industry.

Usage of DIN EN 10216-3 Standard:

EN 10216-3 is a standard that plays a vital role in the world of seamless carbon steel pipes. These pipes find extensive applications in various industries due to their exceptional properties and reliability. Some of the key sectors where this standard finds extensive usage include:

  • Power Generation: EN 10216-3 seamless carbon steel pipes are extensively used in power plants for various applications. They are commonly employed in boiler systems, where they transport high-temperature and high-pressure steam. These pipes exhibit excellent thermal conductivity and strength, ensuring efficient heat transfer and reliable performance in power generation facilities.
  • Petrochemical Industry: In the petrochemical industry, EN 10216-3 seamless carbon steel pipes are employed for transporting fluids and gases under demanding conditions. They are utilized in the construction of pipelines that carry crude oil, natural gas, and various chemicals. These pipes offer exceptional resistance to corrosion and can withstand extreme temperatures and pressures, ensuring safe and efficient transportation of petrochemical products.
  • Oil and Gas Sector: EN 10216-3 seamless carbon steel pipes find widespread use in the oil and gas sector. They are employed in exploration, production, and transportation activities. These pipes are used for drilling operations, well completion, and oil and gas extraction. They exhibit excellent mechanical properties, making them suitable for harsh offshore environments and onshore applications.
  • Mechanical and Structural Applications: EN 10216-3 seamless carbon steel pipes are also utilized in mechanical and structural applications. They are employed in the construction of bridges, buildings, and infrastructure projects. These pipes offer high tensile strength, durability, and impact resistance, ensuring the integrity and stability of various structures.


EN 10216-3 is a significant standard that governs the technical delivery conditions for seamless carbon steel pipes. Understanding the general information, areas of application, varieties, technical details, dimensions and tolerances, chemical and mechanical properties, as well as the certification process of EN 10216-3 pipes, provides blog readers with valuable insights into the importance and applicability of this standard in various industries.

DIN EN 10216-3 Standard and its Sub Grades


What is EN standards classification?: A Comprehensive Overview

Understanding EN Standards Classification:

EN Standards Classification is a systematic framework established by the European Committee for Standardization (CEN) to categorize seamless steel pipes based on specific characteristics and requirements. It provides a clear structure that enables manufacturers, suppliers, and users to identify and select the most suitable seamless steel pipes for their intended applications.

Key Components of EN Classification:

The EN Standards Classification comprises several key components that help in categorizing seamless steel pipes. Some important components include:

  • Material Composition: EN Standards Classification takes into account the material composition of seamless steel pipes, such as the type of steel used and its chemical composition. This classification helps identify pipes suitable for specific environments, such as high temperatures, corrosive conditions, or extreme pressure applications.
  • Mechanical Properties: Seamless steel pipes are classified based on their mechanical properties, including tensile strength, yield strength, elongation, and impact resistance. This classification enables users to select pipes with the required mechanical properties for their intended applications, ensuring structural integrity and performance.
  • Dimensional Specifications: EN Standards Classification considers dimensional specifications such as outer diameter, wall thickness, and length. These specifications help users identify pipes that meet their precise dimensional requirements, ensuring compatibility with existing infrastructure and ease of installation.
  • Application-specific Standards: The EN Standards Classification also includes specific standards tailored for various applications, such as pipes for structural purposes, pressure applications, or high-temperature environments. These application-specific standards provide detailed requirements and guidelines to ensure seamless steel pipes perform optimally in their intended applications.

Significance of EN Classification:

The EN Standards Classification offers several advantages for stakeholders in the seamless steel pipe sector:

a. Standardization: By categorizing seamless steel pipes based on specific criteria, the EN Standards Classification promotes standardization across the industry. It ensures consistency in product quality, performance, and dimensional specifications, allowing for seamless integration of pipes from different manufacturers.

b. Product Selection: The classification system helps users identify seamless steel pipes that align with their specific requirements, eliminating the guesswork involved in selecting the right product. It allows for informed decision-making, ensuring that the chosen pipes meet the necessary standards for their intended applications.c.

Compliance and Regulation:

The EN Standards Classification ensures compliance with industry regulations and safety standards. It provides a reliable framework for manufacturers and suppliers to produce and supply seamless steel pipes that meet the necessary requirements, ensuring the overall safety and reliability of infrastructure and systems.

Application Areas:

The EN Standards Classification is applicable to various industries where seamless steel pipes are used, including:

a. Oil and Gas: The classification system helps identify seamless steel pipes suitable for oil and gas exploration, production, and transportation, ensuring the integrity and reliability of pipelines and offshore structures.

b. Construction and Infrastructure: EN Standards Classification assists in selecting seamless steel pipes for construction and infrastructure projects, such as building frameworks, bridges, and underground pipelines, ensuring strength, durability, and compliance with building codes.

c. Mechanical Engineering: The classification system aids in choosing seamless steel pipes for mechanical engineering applications, including machinery, equipment, and automotive components. It ensures the pipes meet the required specifications for mechanical strength, precision, and performance.

The EN Standards Classification is a valuable tool for the seamless steel pipe industry, providing a structured approach to categorizing pipes based on material composition, mechanical properties, dimensional specifications, and application-specific requirements.


What is EN standards classification?

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