ISO 21013-4:2012/Amd 1:2019

Overview

ISO 21013-4:2012/Amd 1:2019 is an amendment to the international standard covering pilot-operated pressure relief devices specifically designed for cryogenic vessels. This standard is part 4 of the ISO 21013 series and focuses on pressure-relief accessories tailored for cryogenic service. Managed by ISO Technical Committee ISO/TC 220, the standard ensures safety and reliability in managing excessive pressure in cryogenic vessels through defined safety devices and materials criteria.

The 2019 amendment introduces important updates, including revised references to other relevant standards such as ISO 4126-4:2013 for pilot operated safety valves. It also updates material specifications and production testing requirements to enhance the performance and safety of pressure-relief accessories used in extremely low temperature environments.

Key Topics

• Pilot-operated pressure relief devices: Devices that automatically relieve excess pressure in cryogenic vessels, activated by pilot valves to provide enhanced safety and control.
• Pressure-relief accessories: Essential components designed to work in tandem with relief valves, adapted for cryogenic conditions to prevent catastrophic vessel failure.
• Material specifications: Metals used must contain less than 65% copper when used with acetylene mixtures to ensure chemical compatibility and safety.
• Production testing requirements: Testing and certification processes aligned with ISO 4126-4:2013, ensuring products meet international safety and quality standards.
• Updated references: The amendment replaces outdated references to older ISO and EN standards, ensuring alignment with the latest international regulatory framework.

Applications

ISO 21013-4:2012/Amd 1:2019 is critical for industries and sectors where cryogenic vessels are used to store and handle liquefied gases at extremely low temperatures, including:

• LNG and other liquefied gas storage: Ensuring reliable pressure relief in storage tanks for liquefied natural gas and similar products.
• Chemical and petrochemical plants: Maintaining safety in cryogenic processes involving acetylene, nitrogen, oxygen, and other gases.
• Medical and research facilities: Safeguarding pressure vessels used for storing and transporting liquid gases in laboratories and hospitals.
• Cryogenic transportation: Pressure relief devices compliant with this standard help protect cryogenic containers during shipping.

This amendment enables manufacturers, engineers, and safety professionals to employ advanced pressure-relief devices that are certified for cryogenic service, enhancing operational safety and regulatory compliance.

Related Standards

• ISO 21013 series: The broader series addressing cryogenic vessels and related safety devices.
• ISO 4126-4:2013: Safety devices for protection against excessive pressure – Part 4 focusing on pilot operated safety valves, referenced for production testing.
• EN 12516 series: European standards on industrial valves that are harmonized in this amendment without edition dates.
• ISO/IEC Directives: Editorial framework governing the preparation and maintenance of ISO standards.

By adhering to ISO 21013-4:2012/Amd 1:2019, stakeholders ensure that cryogenic pressure relief accessories meet stringent international safety, performance, and quality criteria, providing reliable protection in demanding low temperature applications.

Keywords: ISO 21013-4 amendment, cryogenic vessels, pilot operated pressure relief devices, pressure relief accessories, cryogenic service standards, ISO 4126-4:2013, cryogenic safety valves, metal material specifications, acetylene mixtures, production testing, liquefied gas storage safety.