Last Updated Thu, 07/03/2025 - 15:21
FAQ
… If the concentration of hydrogen is less than the Lower Flammability Limit (LFL) of … This mixture can also be used in conjunction with a hydrogen detector for leak testing gaseous hydrogen equipment. … 845 … 795 … 1022 … 832 … 2063 … Is …
Last Updated Wed, 06/18/2025 - 17:03
FAQ
… but also misleading in quantifying the dispersion of hydrogen in terms of comparison of diffusion of air in air. Hydrogen diffuses 4X faster than air, and the rate of mixing … However, it’s generically safe to say that an initial hydrogen gas cloud outdoors and unconfined will dissipate …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… ended 73 seconds after the launch in an explosive burn of hydrogen and oxygen propellants that destroyed the External … on the external tank which eventually failed, after which liquid hydrogen and liquid oxygen burnt in an explosive combustion. There is …
Last Updated Wed, 04/23/2025 - 20:19
Document Library
… The information presented is intended as a reference to hydrogen design and practice and not as an authorizing … or that which is advised but not mandatory. Guidelines for Hydrogen System Design, Materials Selection, Operations, … Storage, and Transportation. … Safety Standard for Hydrogen and Hydrogen Systems …
Last Updated Tue, 07/15/2025 - 14:58
FAQ
… atmospheric pressure where the autoignition temperature of hydrogen is 585°C. … 864 … 770 … 814 … We are working on a project using hydrogen at 600 kPa (87 psi). How is the auto-ignition temperature of hydrogen as a function of pressure determined? … Hydrogen …
Last Updated Mon, 07/14/2025 - 15:52
FAQ
… courses. These, along with a general overview of hydrogen, would probably suffice until work begins on systems … in these activities. … 2117 … How can I implement a hydrogen safety training program in a company where hydrogen is part of the future but not currently used or …
Last Updated Wed, 07/16/2025 - 14:59
FAQ
… This production rate of hydrogen of about 96 kg/h is quite significant, which … from this production rate in order to determine how much hydrogen ground storage is needed. Since the project is in … vessels that might be optimized to store the quantity of hydrogen needed. Storage vessel cost may range from $500 up …
Last Updated Wed, 06/18/2025 - 16:49
FAQ
… The HSP discourages the use of this type of piping for hydrogen despite the low likelihood of ignition within the … produce an electrostatic discharge. Since the nominal hydrogen concentration is so high (and assuming the purge-in … exit if the polyethylene film extends to the exit. If the hydrogen is flowing into an air atmosphere, an electrostatic …
Last Updated Tue, 07/15/2025 - 16:03
FAQ
… published research on the effect of water sprays on hydrogen deflagrations and deflagration-to-detonation … et al. (Atomics International report, 1973) described hydrogen detonation tube testing with and without a … spray. They found the water spray prevented detonations at hydrogen concentrations of 20% to 24%, but not at 28%. Drop …
Last Updated Mon, 07/14/2025 - 15:58
FAQ
… Flammable hydrogen releases can result in deflagration and transition … depends on numerous parameters such as cloud size, hydrogen concentration, confinement, and congestion. Releases … to detonation. … 796 … 792 … 2116 … Will a flammable hydrogen/air cloud detonate? If so, under what conditions? … …
Last Updated Thu, 06/19/2025 - 14:44
FAQ
… 521 (Section 5.2.1), which can be argued is the case with hydrogen for typical industrial gas applications. Flares are … there codes or standards addressing the installation of a hydrogen flare system for excess hydrogen production. Some API and NASA documents address …
Last Updated Mon, 07/14/2025 - 14:42
FAQ
… In most cases, it is not necessary to depressurize hydrogen systems in an emergency. Pressure vessels are … analysis. … 1013 … Must a pressure vessel containing hydrogen be depressurized in an emergency? … Depressurization of hydrogen pressure vessels …
Last Updated Tue, 07/15/2025 - 15:07
FAQ
… answer without greater understanding of the quantities of hydrogen involved, the types of vessels involved, and the … If a tank instantaneously ruptures and completely releases hydrogen into the atmosphere, how long does it take to … a point where it is no longer a fire or explosion risk? … Hydrogen Tank Rupture …
Last Updated Mon, 07/07/2025 - 16:29
FAQ
… Hydrogen affects the mechanical properties of most materials. For example, hydrogen reduces the fracture toughness and increases the … be revealed as requirements in codes like ASME B31.12, Hydrogen Piping and Pipelines, and ASME B31.8, Gas …
Last Updated Wed, 07/09/2025 - 15:35
FAQ
… Hydrogen has been used as a fuel to operate cars, buses, … significant barriers that would prevent the application of hydrogen for trains for a properly designed system. … 1036 … … or safety barriers that are applicable to the operation of hydrogen trains? … Hydrogen train safety considerations …
Last Updated Thu, 05/02/2024 - 20:22
Video
… This video explains some of hydrogen's unique properties and compares hydrogen and propane flames. … Characteristics of Hydrogen …
Last Updated Tue, 01/28/2025 - 15:55
Fuel Cell Codes and Standards
… This standard provides glossary and definitions of hydrogen, hydrogen and hydrogen energy systems technology and its application. … …
Last Updated Mon, 07/14/2025 - 15:11
FAQ
… to clear personnel from the immediate area, isolate the hydrogen, shut down the equipment, contact local responders, … … 1013 … What are the emergency response procedures for a hydrogen-related incident? … Hydrogen emergency response procedures …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… and a catalyst: palladium. The operator was performing hydrogen purges, consisting in sending hydrogen under pressure into the reactor via the hydrogen … the introduction of this new practice, the presence of liquid in the system avoided the drying of the catalyst and …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… closed down the system as follows: - he shut off the hydrogen addition at the reactor and closed the valve at the hydrogen cylinder bank; - the reactor's agitator was turned … was left isolated with an hydrogen atmosphere over the liquid. No nitrogen inerting was used. The operator checked …
