Refrigerating systems and heat pumps are critical components in modern energy management, and the standard SN EN ISO 24664:2025 provides essential guidelines for ensuring their safe operation. This standard focuses on pressure relief devices and their associated piping, outlining methods for calculating mass flow, discharge capacities, and pressure losses. It is applicable to various sectors in the Energy & Heat Transfer industry, offering a framework for compliance that enhances system safety and efficiency.

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What SN EN ISO 24664:2025 covers

SN EN ISO 24664:2025 addresses the methods for calculating pressure relief devices and their associated piping within refrigerating systems and heat pumps. It encompasses aspects such as mass flow calculations for the sizing of pressure relief devices, evaluating discharge capacities for valves and other devices, and assessing pressure loss in inlet and outlet lines. The standard also details criteria for selecting appropriate pressure relief devices to mitigate risks associated with excessive internal and external pressure due to factors like thermal expansion and heat sources, including compressors and heaters. Notably, it excludes detailed design specifications for the refrigerating systems themselves, focusing instead on the pressure relief aspects.

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Who needs to comply with SN EN ISO 24664:2025

The target audience for SN EN ISO 24664:2025 includes professionals and organizations within the Energy & Heat Transfer industry, such as manufacturers of refrigerating equipment, HVAC engineers, and safety compliance officers. Companies of varying sizes, from small to large enterprises, engaged in the design, installation, and maintenance of refrigerating systems and heat pumps, are directly impacted. Regulatory bodies and certification organizations that oversee compliance in these sectors also find the standard relevant, as it provides a foundation for ensuring safety and performance in thermal management systems.

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Key requirements

• Mass Flow Calculation: Establish methods for calculating mass flow to ensure accurate sizing of pressure relief devices.
• Discharge Capacity Evaluation: Specify procedures for determining the discharge capacities of pressure relief valves and related devices when venting to atmosphere or lower pressure areas.
• Pressure Loss Assessment: Provide guidelines for calculating pressure losses in the inlet and outlet lines of pressure relief devices.
• Device Selection Criteria: Outline the necessary requirements for selecting pressure relief devices to prevent excessive pressure due to internal and external sources.
• Thermal Expansion Considerations: Include considerations for the thermal expansion of trapped liquids in the context of pressure build-up.

These requirements are typically audited through a combination of document reviews, system assessments, and on-site inspections to ensure compliance.

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How to implement SN EN ISO 24664:2025

Implementing SN EN ISO 24664:2025 involves several critical steps to ensure compliance and operational safety. Organizations should begin with a gap analysis to identify existing practices against the standard's requirements. Subsequent steps include developing comprehensive documentation that aligns with the standard, followed by training staff on the new protocols and methods. An internal audit should be conducted to verify adherence to the established practices, culminating in a certification audit by an accredited body to confirm compliance. This structured approach not only ensures safety but also enhances the reliability of refrigerating systems and heat pumps.

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Related standards

• ISO 5149: Focuses on the safety and environmental aspects of refrigerating systems, providing guidelines for their design and application.
• EN 378: Addresses safety and environmental aspects of refrigerating systems and heat pumps, complementing the pressure relief focus of SN EN ISO 24664:2025.
• ISO 23953: Relates to the design and control of refrigerated display cabinets, ensuring proper function alongside pressure relief considerations.
• ISO 9001: Establishes quality management principles that can enhance compliance with SN EN ISO 24664:2025 through systematic processes.

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Why SN EN ISO 24664:2025 matters

Compliance with SN EN ISO 24664:2025 is crucial for businesses aiming to enhance safety, ensure legal compliance, and gain a competitive edge in the Energy & Heat Transfer industry. Adhering to this standard helps organizations mitigate risks associated with refrigerating systems, thereby fostering customer trust and facilitating market access. Embracing these standards not only safeguards operational integrity but also positions companies favorably in a regulated and competitive landscape. Explore training and purchase options below to enhance your understanding and implementation of this critical standard.