Critical IIAR 2 Amendment Updates for 2024: What You Need to Know About Ammonia Storage Tank Requirements

The ammonia refrigeration industry is experiencing significant regulatory changes in 2024, with 2024 International Fire Code (IFC) IIAR 2, 6, 7, 8, 9, CO2 · 2024 International Mechanical Code (IMC) IIAR 2, 3, 4, 5, 6 and CO2 and other model codes now incorporating updated IIAR standards. These changes represent the most comprehensive update to ammonia refrigeration safety requirements in years, directly impacting how storage tanks must be designed, insulated, and maintained.

Understanding the IIAR 2 Standard Evolution

The International Institute of Ammonia Refrigeration (IIAR), based in Alexandria, Virginia (U.S.) has announced the release of ANSI/IIAR 2-2021, the latest version of IIAR 2, considered the leading standard for the design of safe closed-circuit ammonia refrigeration systems. This standard has become increasingly influential as model code bodies – including the International Mechanical Code (IMC), ASHRAE-15, the Uniform Mechanical Code (UMC), and the National Fire Protection Association (NFPA) – have decided to defer to IIAR 2 and other IIAR standards as the basis for regulating ammonia. This year, the International Fire Code (IFC) tentatively approved a proposal for the 2024 edition of its model code – still subject to public comments – to defer all matters related to ammonia refrigeration, including safety, to IIAR standards.

Key 2024 Changes Affecting Ammonia Storage Tanks

The 2024 amendments bring several critical updates that directly impact storage tank requirements. Some of the changes to the 2021 edition of IIAR-2 include: Requirements for eyewash/safety showers have been reorganized and clarified. Ammonia-detection requirements have been changed. Changes to machinery-room exhaust and ventilation have been updated based on new requirements. New requirements for evaporators are included concerning design for freeze protection and design for frozen products.

These updates emphasize enhanced safety protocols and more stringent design requirements, particularly for systems operating in extreme temperature conditions. For businesses operating ammonia storage tank requirements, compliance with these new standards is not optional – it’s essential for both safety and regulatory compliance.

Insulation Requirements Under the New Standards

One of the most significant areas of change involves insulation requirements for ammonia storage systems. For insulated piping, supports shall be designed or the insulation shall be selected to avoid damage to the insulation from compression. This requirement extends beyond piping to encompass comprehensive tank insulation systems that must maintain structural integrity while providing thermal protection.

The updated standards recognize that proper insulation is critical not only for energy efficiency but also for safety. Safety is critical in the design, construction and operation of refrigeration systems for cold storage, especially with ammonia systems. Meet the ASHRAE Standard 15 refrigeration system’s safety standards. ASHRAE Standard 15 specifies safe design, construction, installation, and operation of refrigeration systems by establishing safeguards for life, limb, heath and property and prescribing safety standards.

The Role of Professional Tank Insulation Companies

With these enhanced requirements, the expertise of specialized tank insulation providers becomes crucial. Companies like Thermacon, which has been producing tank insulation systems since 1971, and these years of experience have enabled us to provide the best possible service. For over forty years, Thermacon has designed, engineered, manufactured and installed storage tank insulation products throughout the world.

Thermacon’s approach aligns perfectly with the new IIAR 2 requirements, offering revolutionary tank insulation systems that are designed for storage tanks functioning at temperatures as low as -50°F. What makes this system so energy efficient is its sophisticated vapor barrier system, complete with the highest quality panel design. This capability is particularly important given that we are able to handle temperatures of stored materials that may vary from -50°F to +500°F.

Compliance and Implementation Considerations

The 2024 amendments require a comprehensive approach to tank insulation that goes beyond basic thermal protection. Our sidewall and roofing insulation systems are designed and engineered by our engineering staff. Thermacon will take all of your requirements into account and bring you a system that will meet your needs, no matter if you store petroleum products, gases, chemicals, beverages or wastewater treatment.

For facilities needing to upgrade their systems, we’ve had success installing this tank insulation system on new tanks as well as retrofit situations. This flexibility is crucial for existing facilities that must comply with the new requirements without completely rebuilding their infrastructure.

Looking Forward: Best Practices for Compliance

The IIAR 2 2024 amendments represent a significant step forward in ammonia refrigeration safety. IIAR 2 “incorporates topics traditionally addressed in other codes and standards making it the single most comprehensive standard covering the safe design of closed-circuit ammonia refrigeration systems published to date,” said IIAR.

For businesses operating ammonia storage systems, partnering with experienced insulation specialists is essential. Only Thermacon uses the latest computer-aided design (CAD) equipment to incorporate specific operational, wind load and climatic conditions into every system we create. In addition, compared to other tank insulation companies, only our engineers will work with you to select the proper materials for your operational needs and budget.

The 2024 IIAR 2 amendments mark a new era in ammonia refrigeration safety, with enhanced requirements that prioritize both operational efficiency and worker safety. By understanding these changes and working with qualified professionals, facilities can ensure compliance while maintaining optimal performance of their ammonia storage systems. The investment in proper insulation and system upgrades today will pay dividends in safety, efficiency, and regulatory compliance for years to come.