The 33rd China International Exhibition on Electric Power Equipment and Technology
Shanghai International Energy Storage Technology Application Expo / Hydrogen Energy Expo
Gaseous hydrogen storage and transport is the most commercially mature method for handling hydrogen, involving compression of hydrogen gas to high pressures (typically 200–700 bar) for storage in steel or composite cylinders, tube trailers, or fixed storage vessels. Type I (all-steel) and Type II (steel liner with fibre wrap) cylinders are used for stationary industrial applications, while Type III (aluminium liner, full fibre wrap) and Type IV (polymer liner, full carbon fibre wrap) cylinders are used for vehicle on-board storage and refuelling stations due to their lower weight. Tube trailers — multiple high-pressure cylinders mounted on a road vehicle — are the standard method for distributing compressed hydrogen from production sites to refuelling stations and industrial users. Dedicated hydrogen pipelines represent the most economical transport method at scale.
5 Key Questions About Gaseous Hydrogen Storage and Transport
Gaseous hydrogen is stored at a range of pressures depending on the application. Industrial storage cylinders typically operate at 150–300 bar. Hydrogen tube trailers for road transport operate at 200–500 bar. Fuel cell vehicle on-board tanks use 700 bar (Type IV composite cylinders) to maximise driving range. Hydrogen refuelling stations maintain buffer storage at 500–900 bar to enable rapid dispensing. Higher pressures increase storage density but require more energy for compression and impose greater demands on cylinder materials and safety systems.
Type IV composite cylinders consist of a polymer (typically high-density polyethylene) liner fully wrapped with carbon fibre reinforced polymer (CFRP). They offer the highest gravimetric hydrogen storage density of any cylinder type — critical for vehicle applications where weight directly impacts driving range. Type IV cylinders rated at 700 bar are the standard for hydrogen fuel cell passenger vehicles and buses. China has developed domestic Type IV cylinder manufacturing capability, with companies such as Sinoma Science & Technology and Beijing Tianhai producing cylinders that meet international safety standards.
Hydrogen pipelines offer significantly lower transport costs per unit of hydrogen at scale — estimated at USD 0.10–0.30/kg per 100 km for large pipelines, compared to USD 1–3/kg per 100 km for tube trailer transport. However, pipelines require large upfront capital investment and are only economical for high-volume, stable hydrogen flows. Tube trailers are more flexible and require lower upfront investment, making them the preferred option for early-stage hydrogen markets with smaller, dispersed demand. China's hydrogen pipeline network is currently limited but expanding, with plans for thousands of kilometres of dedicated hydrogen pipelines by 2030.
Gaseous hydrogen storage is governed by international standards including ISO 11114 (gas cylinder compatibility), ISO 15869 (vehicle fuel tanks), and EN 13322 (refillable seamless steel cylinders). In China, GB/T 35544 covers vehicle-mounted high-pressure hydrogen cylinders, while GB 50516 governs hydrogen refuelling station design. The Chinese government's special equipment safety law requires mandatory inspection and certification of pressure vessels, including hydrogen cylinders, by the State Administration for Market Regulation (SAMR).
Key innovations reducing gaseous hydrogen storage costs include: advanced carbon fibre manufacturing techniques reducing Type IV cylinder costs; automated cylinder production lines improving quality and throughput; higher-strength steel alloys enabling thinner walls in Type I/II cylinders; improved valve and regulator designs reducing leakage and maintenance costs; and digital monitoring systems enabling condition-based maintenance and extended service intervals. Chinese manufacturers are investing heavily in these areas, with domestic Type IV cylinder costs declining rapidly as production volumes increase.
Key Takeaways
Digital twins create virtual replicas of physical power systems, enabling real-time monitoring, predictive maintenance, and operational optimization without risking actual equipment. As China's power grid becomes more complex with distributed renewables and flexible loads, digital twin technology is becoming essential for reliable, efficient operation. EP Shanghai showcases the latest digital twin platforms from leading technology providers.
Firefox
Chrome
Safari
QQ
Edge