Views: 0 Author: J-VALVES Publish Time: 2025-03-19 Origin: Site
EN 12516 is a series of European standards that specify the design, construction, testing, and marking requirements for industrial valves, including check valves. These standards are developed to ensure that valves used in various industrial applications meet high levels of safety, reliability, and performance. Compliance with EN 12516 is crucial for manufacturers aiming to sell their products in the European market.
The EN 12516 standard is divided into several parts, each addressing different aspects of valve design and testing:
• EN 12516-1: Specifies the tabulation method for determining the wall thickness of valve bodies, bonnets, and covers made from forged, cast, or fabricated steel.
• EN 12516-2: Outlines the requirements for production testing, including test procedures and acceptance criteria for industrial valves made of metallic materials.
• EN 12516-3: Provides guidelines for the design and testing of valve end connections, ensuring compatibility and interchangeability.
• EN 12516-4: Specifies material requirements for valve shells, ensuring they meet the necessary strength and durability standards.
Technical Specifications of EN 12516
Wall Thickness Determination (EN 12516-1)
EN 12516-1 provides a detailed method for calculating the wall thickness of valve shells. This is crucial for ensuring that the valve can withstand the specified pressures and temperatures without failure. The standard covers a wide range of pressure ratings (PN) and classes, including:
• PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400
• Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500, Class 4500
Production Testing (EN 12516-2)
EN 12516-2 outlines the testing procedures and acceptance criteria for industrial valves. This includes:
• Hydrostatic Testing: Valves must undergo hydrostatic testing to verify their ability to withstand maximum allowable working pressures.
• Pneumatic Testing: Pneumatic tests are conducted to check for leaks and ensure the valve's integrity under operating conditions.
• Non-Destructive Examination (NDE): The standard specifies NDE procedures such as ultrasonic testing (UT), radiographic testing (RT), and magnetic particle inspection (MPI) to detect defects in the valve components.
EN 12516-3 ensures that valve end connections are designed and tested to meet specific standards, ensuring compatibility and interchangeability. This includes:
• Flanged End Connections: Compliance with EN 1092-1 for steel flanges.
• Welded End Connections: Specifications for butt-weld and socket-weld end connections.
• Threaded End Connections: Standards for threaded connections, ensuring they meet the necessary strength and sealing requirements.
Material Requirements (EN 12516-4)
EN 12516-4 specifies the material requirements for valve shells, ensuring they meet the necessary strength and durability standards. This includes:
• Stainless Steel: Suitable for corrosive environments and high-temperature applications.
• Carbon Steel: Ideal for high-pressure applications requiring robust construction.
• Alloy Steel: Used for specialized applications requiring high strength and corrosion resistance.
Benefits of EN 12516 Compliance
Compliance with EN 12516 ensures that check valves meet the stringent requirements of the European market, facilitating market access and reducing barriers to entry.
EN 12516 standards ensure that check valves are designed, manufactured, and tested to the highest safety and reliability standards, reducing the risk of failures and ensuring long-term performance.
By adhering to EN 12516, manufacturers ensure that their check valves are compatible with other components in the pipeline system, facilitating easy installation and maintenance.
