Last Updated Thu, 06/19/2025 - 16:05
FAQ
… the best practice is to use a dedicated vent line for hydrogen which vents hydrogen to a safe location outside. This is especially …
Last Updated Tue, 06/17/2025 - 19:27
FAQ
… pressure (if any) for leak checking newly assembled hydrogen piping systems? It is unclear what pressure is … how does it apply to other types of connections from hydrogen fueling stations like double ferrule compression …
Last Updated Tue, 06/24/2025 - 19:35
FAQ
… The Hydrogen Safety Panel is not aware of any detailed guidelines … consideration when working fuel cell systems equipped with hydrogen storage tanks and related hydrogen piping systems. In general, the pressurized gaseous …
Last Updated Thu, 06/26/2025 - 16:41
FAQ
… was lit. In cases where substantial quantities of unused hydrogen is vented and the timing and amount of the flow rate … NASA guidelines stipulate that flaring is appropriate for hydrogen vent rates surpassing 0.2 kg/s (~0.44 lb/s). Flare …
Last Updated Tue, 07/01/2025 - 16:29
FAQ
… Flame arrestors can be installed on hydrogen gas vents. The purpose of a flame arrestor is to … vented to atmosphere, and where there is a possibility of hydrogen leakage into the crankcase, that vent might use a … safe location. Since the crankcase might then have an air-hydrogen mix, a flame arrestor can prevent the propagation of …
Last Updated Fri, 10/18/2024 - 20:30
Fuel Cell Codes and Standards
… streams. It specifically applies to large volume hydrogen production plants, defined for this publication as a …
Last Updated Tue, 07/01/2025 - 16:45
FAQ
… There are many potential sources of delayed ignition. Hydrogen is easily ignited, and the larger the cloud, the … mix in the air creating a static charge which ignites the hydrogen. Similarly, the force of the release can cause …
Last Updated Fri, 10/04/2024 - 18:41
Fuel Cell Codes and Standards
… use. The document applies only to compressed gaseous hydrogen-fuelled fuel cell power systems. The document does …
Last Updated Tue, 07/01/2025 - 16:38
FAQ
… vent system as NG is less dense than air. For nearly pure hydrogen the recommendations of this presentation are in …
Last Updated Mon, 07/07/2025 - 15:15
FAQ
… tubing materials and tube wall thicknesses suitable for hydrogen and pressures you are using. Make sure all tubing …
Last Updated Mon, 06/30/2025 - 14:53
FAQ
… charge) and the low ignition energy, it is assumed that hydrogen in the air will ignite (between 4 -74%), as it does … no ignition. Other Information: The ignition energy of hydrogen is .02 millijoules. By definition, a joule is equal … at 1m/s against a metal surface, and the ignition of hydrogen over many concentrations was observed. … 815 … 939 … …
Last Updated Tue, 06/24/2025 - 19:45
FAQ
… substances prior to performing maintenance. For gaseous hydrogen systems, methods such as a blind flange, a double … quickly. A disadvantage of the double valve is that hydrogen may leak through the first valve and allow pressure … failure mode of the double block valve arrangement. For hydrogen systems, the outlet of the bleed valve should be …
Last Updated Thu, 11/14/2024 - 18:54
Fuel Cell Codes and Standards
… and the environment inside and outside the vehicle against hydrogen related hazards – the marking and labelling …
Last Updated Tue, 07/01/2025 - 16:17
FAQ
… 2) or NFPA 497 to evaluate larger vent releases where the hydrogen cloud will extend beyond the prescriptive distances. …
Last Updated Thu, 07/03/2025 - 14:48
FAQ
… assessment which evaluates a balance of risk. Keeping the hydrogen in the vessel is better so the hydrogen release does not compound the original hazard. Large …
Last Updated Wed, 07/16/2025 - 14:53
FAQ
… … 882 … 895 … 804 … How much ventilation would a hydrogen compressor enclosure need in California, assuming …
Last Updated Mon, 08/05/2024 - 23:46
Team
… of Science and Technology. Don is a past-chair of the Hydrogen Safety Panel. … Donald Frikken …
Last Updated Thu, 11/14/2024 - 16:29
Fuel Cell Codes and Standards
… technical requirements for the safe integration of gaseous hydrogen fueled Proton Exchange Membrane (PEM) Fuel Cell …
Last Updated Tue, 07/01/2025 - 16:01
FAQ
… but then larger banks that contain larger quantity of hydrogen that will be released in a single event. The main … must be closed during transport), a smaller release of hydrogen would occur. … 945 … 892 … 2061 … There is an …
Last Updated Wed, 07/09/2025 - 15:02
FAQ
… pressure relief devices can be an important safeguard for hydrogen vessels if properly designed and installed in …
