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April 2015 BSJ

Hydrogen and Fuel Cells: Focusing on Facility Safety Requirements continued and outdoor separation distances. The lack of listed equipment and associated effects are considered, along with near-term activities to assist with equipment certification. HIGH-PRESSURE GAS SAFETY REQUIREMENTS High-pressure hydrogen gas storage systems will be used extensively for vehicle fueling and less frequently for some stationary applications. Because of hydrogen’s small molecular size, these systems have more potential for leaks. Although hydrogen releases will tend to disperse rapidly upward, leaks can produce flammable gas clouds. The following safety measures will reduce the risk from a hydrogen leak: • Material selection to prevent premature fatigue and cracking • Storage container design to ensure gas containment • Component design to reduce the probability of leaks at connections • Pressure detectors and chemical detectors to detect loss in system pressure or release of material to the atmosphere • Regular system inspection and maintenance Specific requirements from the 2015 International Fire Code® (IFC) that address high-pressure hydrogen gas safety include the following: • Chapter 23, Motor Fuel—Dispensing Facilities and Repair Garages, specifically section 2309 (includes compliance with NFPA 2, Hydrogen Technologies Code) • Chapter 53, Compressed Gases (includes compliance with NFPA 55, Compressed Gases and Cryogenic Fluids Code) • Chapter 55, Cryogenic Fluids • Chapter 58, Flammable Gases and Flammable Cryogenic Fluids OUTDOOR SEPARATION DISTANCES Separation distance requirements can significantly affect a proposed project, particulary for hydrogen fueling stations. This discussion focuses primarily on the requirements for bulk hydrogen systems, that is, gaseous systems with a storage capacity of greater than 5,000 SCF and liquid hydrogen systems with a capacity of more than 39.7 gallons. Outdoor separation distance requirements for bulk hydrogen systems in the IFC are covered by chapters Approve Special Inspections with Confidence Building departments rely on IAS to assess and monitor special inspection agencies. In return, they get the expertise and resources to facilitate special inspections, all at no cost to the building department. Contact IAS to find out how you can enforce special inspections with confidence. 1-866-427-4422 | www.iasonline.org/sia 14-09821 APRIL 2015 | 45 —*ADVERTISEMENT— NEW! 2015 INTERNATIONAL SOLAR ENERGY PROVISIONS™ Contains all I-Code solar energy provisions plus key ICC-SRCC standards and more, making ISEP the most comprehensive document for solar energy code provisions and standards in the nation. ISEP meets the industry’s needs for a resource that contains all solar energy-related provisions from the 2015 I-Codes® and selected standards in one document. The ISEP provides the best tool for the design, installation and administration of both solar thermal and photovoltaic systems. Get all 2015 Solar Energy requirements in one source ORDER NOW! 15-10933 —*ADVERTISEMENT—


April 2015 BSJ
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