Senior Gas & Cylinder Technology Consultant | 20+ years in high-pressure storage
Type 4 Composite CNG Cylinder – Lightweight, High-Performance Compressed Natural Gas Storage for Modern Fleets
If you are sourcing a type 4 composite CNG cylinder for your bus fleet, truck conversion, or stationary storage system, the key question is: how do you achieve maximum gas storage capacity while minimizing vehicle weight and maintenance? The answer lies in a fully wrapped composite cylinder with a non-metallic liner—Type 4. These cylinders are up to 70% lighter than traditional steel (Type 1) models, resist corrosion, offer a fatigue life exceeding 15,000 cycles, and meet stringent international safety standards (such as ISO 11439, DOT FMVSS 304, and ECE R110). They are the preferred choice for OEMs and fleet operators across North America.
Why Move Away from Steel? The Hidden Costs of Heavy CNG Storage
Import managers, brand owners, and fleet operators often underestimate the long-term burden of traditional CNG cylinders. Steel (Type 1) and even hoop‑wrapped (Type 2) cylinders add hundreds of kilograms to a vehicle, directly reducing payload capacity and fuel economy. They are prone to rust, require frequent inspection for corrosion damage, and have a limited service life in humid or road‑salt environments. In the USA, the Department of Transportation (DOT) now encourages the use of composite technology to improve safety and efficiency. The upfront cost of Type 4 cylinders is higher, but the total cost of ownership—when factoring in fuel savings, longer life, and fewer replacements—is significantly lower.
The Type 4 Composite Solution – Engineering Excellence from China’s Leading Supply Chain
Type 4 composite CNG cylinders consist of a high‑density polyethylene (HDPE) or polyamide liner, fully wrapped with a carbon‑fiber/epoxy composite. There is no metallic load‑bearing part—the liner only acts as a gas barrier. This design delivers exceptional strength‑to‑weight ratio, zero corrosion, and excellent impact resistance. At Zhuzhou XingYe Chemical, we combine over a decade of expertise in gas containment with the advantages of China’s advanced composite manufacturing ecosystem. Our cylinders are produced in a facility covering 12,000 m² with over 200 skilled employees (since our founding in 2014), ensuring consistent quality and just‑in‑time delivery for global B2B buyers.
Key Advantages & Technical Comparison
| Parameter | Type 1 (Steel) | Type 2 (Hoop‑wrap) | Type 3 (Full wrap, metal liner) | Type 4 (Full wrap, polymer liner) |
|---|---|---|---|---|
| Weight (for 140L @ 250 bar) | ~120 kg | ~85 kg | ~65 kg | ~35 kg |
| Corrosion resistance | Low | Medium | Medium | High (no metal liner) |
| Fatigue life (cycles) | ~5,000 | ~8,000 | ~10,000 | >15,000 |
| Service life (years) | 15–20 | 15–20 | 20–25 | 20–30 |
| Burst pressure safety margin | 2.25x | 2.25x | 3x | ≥3.5x |
| Compliance (USA common) | DOT‑3AA | DOT‑3HT | DOT‑3T | DOT‑4T / ISO 11439 |
cng cylinder type 4 cng cylinder type type 2 cng cylinder
* Data based on typical 200‑250 bar service pressure. Exact specifications vary by model. Please refer to the actual order confirmation.
Technical Parameters & Global Certifications
Our Type 4 composite CNG cylinders are designed for working pressures from 200 to 300 bar and water capacities from 10 to 360 litres. Standard options include 140L, 170L, and 200L for light‑duty vehicles and larger 250L–360L for buses and trucks. All cylinders are manufactured under ISO 9001:2015 quality management and carry the following certifications (depending on destination):
- ISO 11439 – International standard for CNG cylinders for road vehicles.
- DOT FMVSS 304 / DOT‑4T – US Department of Transportation approval.
- ECE R110 – United Nations regulation for CNG components in vehicles.
- CE (Pressure Equipment Directive 2014/68/EU) – For European markets (upon request).
- COA (Certificate of Analysis) and MSDS – supplied with every batch of cylinders.
In addition to standard certifications, we offer OEM/ODM design for custom valve connections, bracket interfaces, and labeling to match your specific vehicle or storage system. Our engineering team can adapt the liner material, fiber lay‑up, and pressure levels to meet unique requirements—all while maintaining the speed and cost efficiency of China’s supply chain.
B2B Commercial Terms: Designed for Importers & Sourcing Agents
Standard MOQ: 10 units for popular sizes (e.g., 140L). For OEM designs, MOQ starts at 50 units. Sample orders (1–2 pcs) are welcome for evaluation.
Stock items: 15–20 days. OEM/ODM orders: 30–45 days after design approval. Expedite options available for rush orders.
Each cylinder individually wrapped in anti‑static film, placed in a plywood crate or steel‑frame case. Export packaging meets IPPC standards.
FOB Shanghai or CIF to major US ports (Los Angeles, Houston, New York). We also offer door‑to‑door via DDP for confirmed orders. Freight cost included in quotation upon request.
5‑year warranty against manufacturing defects. Technical support via email/phone 24/7. Replacement parts (valves, burst discs) available within 3 years. On‑site training for large fleets (travel expenses apply).
Our Factory – Built for Scale & Quality
Established in 2014, Zhuzhou XingYe Chemical Co., Ltd operates a dedicated cylinder production unit within our 12,000 m² facility. We employ over 200 people, including 25 R&D and quality engineers. Our annual capacity for Type 4 composite cylinders exceeds 8,000 units, with the flexibility to scale up to 12,000 units per year as demand grows. We have supplied cylinder solutions to clients in 17 countries, including the USA, Canada, Germany, and Australia.
Every cylinder undergoes hydrostatic testing, burst pressure verification, and leak detection before shipment. We maintain full traceability with batch numbers and test reports—ensuring you receive a product that meets every regulatory requirement.
What Our Clients Say – Real Feedback from Local Users
“We replaced 140 steel CNG cylinders with Type 4 from Zhuzhou XingYe. The weight reduction added about 400 kg extra payload to each bus. After 18 months of salt‑road winters, there’s zero corrosion. The documentation made DOT inspection a breeze. Highly recommend.”
“We needed a reliable supplier for a 200‑cylinder order with custom valve positions. The team delivered perfectly on specs, even ahead of schedule. The MOQ flexibility allowed us to test 10 units first. Maintenance costs have dropped significantly compared to Type 2.”
“After visiting their factory in Zhuzhou, I was impressed by the precision of the winding process and the rigor of testing. The pricing is competitive, lead times consistent, and communication clear. They became our primary composite cylinder partner.”
“Navigating NAFTA compliance was made easy with Zhuzhou XingYe’s certification packages. The cylinders cleared customs without issues. The customer service team helped us choose the right pressure rating for our altitude. Very satisfied.”
“The weight savings allowed our off‑grid customers to install larger storage on their trailers. The 5‑year warranty and quick replacement parts service gave us confidence to recommend these cylinders to our network.”
Secure Your Tomorrow with the Right Cylinder
The transition to lighter, safer, and longer‑lasting CNG storage is no longer optional—it is a competitive necessity. Whether you are a brand owner launching a new truck model, a sourcing agent consolidating orders, or a fleet manager upgrading existing vehicles, our Type 4 composite cylinders deliver the performance and compliance you need.
Ready to source? Contact us today for a detailed quotation, technical datasheet, or sample request. We support FOB, CIF, and DDP terms, and we ship to any US port within 20 days for stock sizes.
Zhuzhou XingYe Chemical Co., Ltd
Tel: +86 13787826843 | WhatsApp: 19313298383
Email: boss@happywhip.com
Web: https://www.whipways.com/contactus.html
All technical data provided is for reference only. Actual performance, dimensions, and certification scopes should be confirmed in the order contract. Lead times are based on current production capacity and may vary during peak seasons.
