High-Pressure Hydrogen Gas Filling & Storage Cylinders
Seamless Steel & Composite Cylinders Engineered for Hydrogen Refueling Stations and Gas Transport Modules
Product Overview & Technical Specification Matrix
Hydrogen gas requires specialized containment solutions due to its low molecular weight, high diffusivity, and potential to cause metal embrittlement. These cylinders are manufactured from quenched and tempered alloy steel (30CrMo / 34CrMo4) or carbon-fiber composite structures, engineered specifically for high-pressure hydrogen cascade systems and tube trailers.
Standard Technical Parameters
|
Model |
Water Capacity (L) |
Working Pressure (MPa / bar) |
Test Pressure (MPa) |
Material Grade |
Thread Type |
Execution Standard |
|
HFC-50-200 |
50 L |
20.0 MPa / 200 bar |
30.0 MPa |
34CrMo4 |
PZ27.8 / W21.8 |
ISO 9809-1 / DOT-3AA |
|
HFC-450-450 |
450 L |
45.0 MPa / 450 bar |
67.5 MPa |
34CrMo4 / FVK |
3/4-14UNF |
ISO 11120 / ASME Sec. VIII |
|
HFC-500-500 |
500 L |
50.0 MPa / 500 bar |
75.0 MPa |
Note: Custom water capacities ranging from 10L to 4000L and working pressures up to 70MPa available upon engineering review.
Product Selection Guide: How to Specify
To prevent fluid system mismatch, evaluate the following operational parameters before issuing an RFQ:
Operating Pressure Profile: Determine if your system operates at 20MPa (standard industrial distribution), 45MPa (medium-pressure station cascade), or 70MPa (passenger vehicle refueling).
Cyclic Duty Cycle: Select seamless steel (Type I) for stationary buffer storage with low fill-discharge frequency, or carbon fiber composite (Type III/IV) for mobile transport trailers where weight reduction directly impacts payload efficiency.
Gas Purity & Interior Finish: For fuel-cell grade hydrogen (Grade D/SAE J2719, 99.999%), specify interior mechanical polishing or chemical passivation to eliminate particulate shedding and moisture retention.
Environmental Temperature Range: Standard operating limits span -40°C to +65°C. Specify low-temperature impact testing requirements if deploying in arctic or sub-zero environments.
Application Context & System Integration
[Hydrogen Production / Supply]
│
▼
[Compression Unit] ──> [Hydrogen Gas Filling Cylinder Cascade (Storage)]
│
├──> [Dispenser (Fuel Cell Vehicles / Forklifts)]
└──> [Industrial Process Manifold]
Hydrogen Refueling Stations (HRS): Deployed as high, medium, and low-pressure storage cascades to buffer compressor output and rapidly fill vehicle tanks via pressure differential.
Tube Trailer Gas Modules: Bundled in frameworks of 4 to 16 large-capacity cylinders (water volume 400L+ per cylinder) for bulk over-the-road transport of compressed hydrogen gas.
Industrial Plant Backup Supply: Integrated into central gas supply rooms for semiconductor manufacturing, polysilicon production, and power generator cooling systems.
Manufacturing Process & Quality Control
Production Workflow
Billet Inspection: Continuous casting 34CrMo4 steel billets checked via ultrasonic methods for internal inclusions, segregations, and micro-voids.
Hot Piercing & Drawing: Billets heated to 1200°C and processed through vertical hydraulic piercing presses and multi-stand elongator benches to achieve uniform wall thickness distribution (T_min >= T_nominal).
Heat Treatment: Quenching and tempering furnaces with automated temperature logging ensure a tempered martensite microstructure, providing high yield strength (850 MPa) coupled with impact toughness.
CNC Machining: Neck threading and base profiling executed on multi-axis CNC lathes to maintain strict perpendicularity and thread pitch tolerance per ISO/ANSI standards.
Hydrostatic & Burst Testing: Water jacket volumetric expansion testing measures permanent volumetric expansion ratio (<= 10%). Destructive batch testing verifies burst pressure safety factors (>= 2.25 for seamless steel).
Compliance & Certifications
Procuring for international markets requires verifiable documentation. Our manufacturing facility and product designs hold the following accreditations:
Pressure Equipment Directive: PED 2014/68/EU (CE Marking with Notified Body identification number).
Transportable Pressure Equipment Directive: TPED (π marking for road transport across EU member states).
North American Standard: ASME Boiler and Pressure Vessel Code (BPVC Section VIII, Division 1) compliance and DOT-3AA/3AAX approvals upon request.
Quality Management: ISO 9001:2015 and ISO 14001:2015 certified manufacturing plant.
Supplier Evaluation Criteria for Buyers
When auditing a hydrogen cylinder manufacturer, verify these non-negotiable operational checkpoints:
Traceability: Can the supplier trace a finished cylinder back to the specific ladle analysis of the raw steel mill via serial number stamping? (Our system maintains permanent laser-etched heat numbers linked to digital mill test certificates).
Welding and Assembly Qualifiers: For skid-mounted cylinder bundles, are all manifold welds performed by ASME Section IX certified welders using non-destructive examination (RT/UT)?
Cleaning Protocols: Are cylinders cleaned and purged with dry nitrogen ([O_2] < 2 ppm, dew point < -50°C) before valve installation to prevent catalyst poisoning in downstream fuel cells?
Frequently Asked Questions
Q: How do you prevent hydrogen embrittlement in seamless steel cylinders?
A: Hydrogen embrittlement is mitigated by strictly controlling steel chemistry (limiting sulfur and phosphorus content to < 0.005%), maintaining a controlled microstructure through precise quench-and-temper heat treatment, and ensuring tensile strengths do not exceed specified threshold limits (typically < 950 MPa for hydrogen service).
Q: What is the standard re-test interval for high-pressure hydrogen cylinders?
A: Re-inspection intervals depend on local statutory regulations and service conditions. Typically, seamless steel cylinders in industrial service require visual inspection and hydrostatic pressure testing every 3 to 5 years (e.g., TPED/DOT requirements).
Q: Can these cylinders be supplied pre-assembled into transport skids or storage cascades?
A: Yes. We supply individual cylinders, complete multi-cylinder skids with stainless steel 316L high-pressure manifolds, safety relief valves (PRV), quarter-turn ball valves, and pressure gauges tested to 1.5x working pressure as a complete assembly.
Q: What documentation is provided with the shipment?
A: Each shipment includes the Manufacturer's Data Report (MDR), Material Test Certificates (MTC) per EN 10204 3.1, Third-Party Inspection Agency (TPIA) conformity certificates, and individual cylinder test logs (water capacity, empty weight, serial number, and test pressure).
Request a Technical Quotation
To generate an accurate engineering proposal, please provide your project parameters:
Required Working Pressure and Total Gas Volume / Flow Rate
Target Application (Stationary Cascade vs. Tube Trailer)
Destination Country and Required Compliance Standards (PED, TPED, ASME, DOT)
Valve and Manifold Configuration Preferences
Hot Tags: high-pressure hydrogen gas cylinder, China high-pressure hydrogen gas cylinder manufacturers, suppliers, factory
