Advanced Structural Technologies receives DOT certification for Type III high-pressure cylinders
UN ISO 11119-2 certification enables the design and manufacture of new, large-diameter hydrogen storage vessels with faster, more complete filling capabilities.
Photo Credit: Advanced Structural Technologies (AST)
On Aug. 18 Advanced Structural Technologies Inc. (AST, Camarillo, Calif., U.S.) announced that it has obtained the Department of Transportation’s (DOT) certification UN ISO 11119-2 to design and manufacture its cylinders for high-pressure hydrogen gas storage, for worldwide usage.
According to AST, the new, large-diameter hydrogen storage vessels will be sold under the name H2-MAX to signify its unique product characteristics, particularly its faster and complete filling capability. H2-MAX cylinders are designed for hydrogen storage in various applications for zero-emission and sustainable mobility solutions with service pressure of 350 bar (5,076 psi).
The company notes H2-MAX’s additional benefits:
- AST claims its product is the largest diameter Type III cylinder for hydrogen applications in the market
- Custom cylinder diameters fabricated in-house
- Seamless, one-piece aluminum liner
- Inherent leak before burst failure mode
- Superior heat tolerance for extended cylinder life
- Higher impact tolerance for increased safety
- Reportedly faster and complete filling with improved benefits
- Efficient and complete fills in extreme temperatures
- Reduced fueling cost; optimized heat dissipation requires no chilling during filling process
- More complete fueling for reduced range anxiety
- Extended life cylinders
- No replacement needed after exposure to high temperatures
- Surpassed testing requirements to meet maximum cylinder life.
“The large diameter of the H2-MAX allows for fewer cylinders, valves and PRDs; thus, minimizing potential leak points due to the reduced number of fittings and connection points required when compared to a traditional hydrogen storage system designed with conventional cylinders,” says Kevin Black, engineering manager for AST.
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