Advanced Structural Technologies receives DOT certification for Type III high-pressure cylinders

2021-08-20

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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