The 10µm high-permeability porous SS316L plate is fabricated via high-temperature sintering of 316L powder, forming a three-dimensional interconnected pore structure with a nominal pore size of 10 microns and porosity ranging from 35% to 40%. The SS316L material provides excellent corrosion resistance, a wide service temperature range (-200°C to 600°C), and resistance to hydrogen embrittlement, making it suitable for hydrogen-rich and corrosive media such as sulfur- or chlorine-containing environments. The high air permeability translates into low pressure drop and high flow rate during gas passage, effectively balancing flame-arresting safety with system pneumatic efficiency when used as a flame arrester element.

This porous plate functions as the core flame-arresting element in hydrogen fuel cell flame arresters, utilizing the physical quenching effect of its micro-channel network to interrupt flame propagation. The 10-micron pore size is well below the maximum experimental safe gap (MESG) of hydrogen (0.29 mm), meeting flame-arresting requirements for IIC-class hazardous gases. Typical applications include hydrogen supply pipelines for fuel cells, pressure relief valves of hydrogen storage cylinders, vent lines at hydrogen refueling stations, and system ventilation ports. Compared with wire mesh or crimped ribbon flame arresters, the sintered porous plate offers advantages such as monolithic integrity, no shedding risk, clogging resistance, and online backwash regeneration capability.

Product Specifications

Material: Stainless Steel Powder

Size: 275*275mm

Thickness: 3mm

Porosity: 35%~40%

Technique: Sintering

10m Porous SS316L Plate H2 Fuel Arrester

Product Features

Pore Size Aligned with Hydrogen Quenching Requirement
The 10-micron nominal pore size directly corresponds to the critical quenching channel dimension for hydrogen deflagration flame. This pore size grade is consistently achieved during sintering through powder particle size distribution control, requiring no post-processing.

Air Permeability and Flame Arresting Safety in Sync
The high air permeability originates from a 35%–40% open porosity and three-dimensional interconnected pore channels, delivering higher gas flow per unit area at the same pore size grade. This prevents the flame arrester from becoming a flow-restricting component in the hydrogen circuit.

SS316L Intrinsically Resistant to Hydrogen Embrittlement
Low-carbon SS316L stainless steel exhibits low susceptibility to hydrogen-induced cracking under high-pressure hydrogen exposure, making it suitable for long-term service inside a flame arrester in direct contact with hydrogen gas.

Thickness Meets Assembly Strength for Flame Arresters
The 3mm thickness provides sufficient rigidity for direct clamping between flame arrester flanges or pressing into sealing grooves, with no warping or edge chipping during assembly.

Customizable Shape to Fit Arrester Housings
Square plates can be further processed by laser cutting or wire EDM into round, annular, or custom profiles, precisely matching the internal flow channel cross-sections of different hydrogen fuel cell flame arresters.

Sintered Monolithic Structure with No Particle Shedding
Metal powder sintered at high temperature forms a metallurgically bonded monolithic structure-no adhesives, no delamination interfaces. Under repeated hydrogen gas flow impact, no particles detach, avoiding contamination of downstream fuel cell stacks.

High-Permeability Porous SS316L Plate H2 Fuel Arrester

Product Applications

Flame Arresting Installation on Hydrogen Supply Piping
Mounted on the gas supply pipeline upstream of the hydrogen fuel cell stack inlet. When flashback occurs from the stack side, the porous plate blocks flame propagation toward the hydrogen storage tank within milliseconds, preventing tank explosion.

Outlet Protection for Pressure Relief Valves on Hydrogen Cylinder Bundles
Assembled on the discharge port outside the pressure relief valve of high-pressure hydrogen cylinder bundles. During accidental valve opening or emergency venting, it prevents external ignition sources from igniting the high-velocity hydrogen jet through the relief outlet.

Internal Explosion-Proof Barrier inside Hydrogen Dispensers at Refueling Stations
Embedded as a partition plate inside the gas circuit chamber of a hydrogen dispenser, physically isolating electrical components from high-pressure hydrogen zones while allowing gas passage for pressure monitoring, but blocking any flame transmission.

End-of-Line Installation on Fuel Cell System Exhaust Pipes
Installed at the extreme downstream end of the exhaust pipe from a hydrogen fuel cell system. It prevents any residual hydrogen in the exhaust from being ignited at the pipe outlet by static electricity or hot components, and stops flame from propagating back into the stack.

Integration within Onboard Hydrogen Cylinder Combination Valves
Directly integrated inside the combination valve of an onboard hydrogen cylinder, serving as a built-in flame arrester element. It provides bidirectional flame isolation between high-pressure cylinder hydrogen and external fire sources within a limited space.