BluNet manufactures high-quality Type 1 CNG cylinders and Type 1 CNG tanks for safe and reliable compressed natural gas (CNG) storage in vehicles and industrial applications. Made from seamless chromium-molybdenum steel, our cylinders deliver exceptional strength, long service life, and dependable performance while meeting international standards such as ISO 11439, ECE R110, and DOT.
Designed for OEM vehicle manufacturers, CNG conversion companies, fleet operators, and gas distributors, BluNet Type 1 CNG cylinders provide a proven, cost-effective solution for high-pressure natural gas storage. Every cylinder is manufactured under strict quality control and thoroughly tested to ensure consistent safety, reliability, and performance throughout its service life.
Why Choose BluNet Type 1 CNG Cylinders?
Unlike composite cylinders, a Type 1 CNG cylinder features an all-steel seamless construction, making it highly resistant to impact, pressure cycling, and demanding operating conditions. This proven design has been widely used in buses, trucks, passenger vehicles, and industrial gas systems for decades.
- Manufactured from high-strength seamless Cr-Mo steel
- Working pressure up to 20 MPa (200 bar) or 25 MPa (250 bar)
- Excellent fatigue resistance and structural integrity
- Corrosion-resistant protective coating
- Complies with international safety standards
- Available in multiple capacities and dimensions
- OEM and custom manufacturing available
Advanced Manufacturing Process
Our Type 1 CNG tanks are manufactured using advanced production technology and strict quality control to ensure outstanding safety, durability, and long-term performance. The process includes precision hot forming, heat treatment, CNC machining, protective coating, and comprehensive inspection.
Every cylinder undergoes hydrostatic pressure testing, non-destructive testing (NDT), and final quality verification to ensure compliance with international standards, including ISO 11439, ISO 9809, ECE R110, NGV2, and DOT. Learn more about our CNG cylinder manufacturing process, engineering expertise, and quality assurance systems.
Type 1 CNG Cylinder Specifications (ISO 11439)
| Model | Outside Diameter (mm) |
Water Capacity (L) |
Overall Length* (mm) |
Empty Weight* (kg) |
Working Pressure (bar) |
Hydrostatic Test Pressure (bar) |
Heat Treatment | Minimum Wall Thickness (mm) |
Material |
|---|---|---|---|---|---|---|---|---|---|
| ISO325T | 325 | 55 | 910 | 59 | 200 | 300 | Quenched & Tempered (Q&T) | ≥6.6 | 34CrMo4 |
| ISO325T | 325 | 60 | 975 | 63 | 200 | 300 | Quenched & Tempered (Q&T) | ≥6.6 | 34CrMo4 |
| ISO340T | 340 | 57 | 875 | 63 | 200 | 300 | Quenched & Tempered (Q&T) | ≥6.9 | 34CrMo4 |
| ISO340T | 340 | 60 | 840 | 67 | 200 | 300 | Quenched & Tempered (Q&T) | ≥6.9 | 34CrMo4 |
| ISO356T | 356 | 70 | 950 | 76 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.7 | 34CrMo4 |
| ISO356T | 356 | 80 | 1065 | 84 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.7 | 34CrMo4 |
| ISO356T | 356 | 90 | 1175 | 92 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.7 | 34CrMo4 |
| ISO356T | 356 | 60 | 850 | 66 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 65 | 905 | 70 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 70 | 960 | 75 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 75 | 1015 | 77 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 80 | 1060 | 80 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 100 | 1280 | 95 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 120 | 1500 | 111 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 130 | 1610 | 119 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 140 | 1730 | 128 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 145 | 1775 | 130 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 150 | 1840 | 134 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO356T | 356 | 160 | 1950 | 142 | 200 | 300 | Quenched & Tempered (Q&T) | ≥7.2 | 34CrMo4 |
| ISO406T | 406 | 80 | 860 | 88 | 200 | 300 | Quenched & Tempered (Q&T) | ≥8.4 | 34CrMo4 |
| ISO406T | 406 | 90 | 950 | 96 | 200 | 300 | Quenched & Tempered (Q&T) | ≥8.4 | 34CrMo4 |
| ISO406T | 406 | 100 | 1040 | 113 | 200 | 300 | Quenched & Tempered (Q&T) | ≥8.4 | 34CrMo4 |
| ISO406T | 406 | 140 | 1385 | 141 | 200 | 300 | Quenched & Tempered (Q&T) | ≥8.4 | 34CrMo4 |
| ISO406T | 406 | 200 | 1905 | 188 | 200 | 300 | Quenched & Tempered (Q&T) | ≥8.4 | 34CrMo4 |
* Overall length and empty weight are measured without valve and protective cap.
What is Compressed natural gas (CNG) ?
Compressed natural gas (CNG) is a fuel gas composed primarily of methane (CH4) compressed to less than one percent of its volume at standard atmospheric pressure. Stored and distributed using hard containers at pressures between 20-25 megapascals (2,900-3,600 psi), typically cylindrical or spherical shapes are utilized for storage and distribution of this product.
CNG can be utilized in modified traditional gasoline/internal combustion engine vehicles or vehicles specifically manufactured to accommodate CNG usage.
Applications
BluNet Type 1 CNG tanks are suitable for a wide range of compressed natural gas storage applications where reliability and cost efficiency are essential.
- CNG passenger vehicles
- City buses and coaches
- Heavy-duty trucks
- Municipal service vehicles
- Taxi fleets
- CNG cascade storage systems
- Industrial compressed natural gas storage
- Mobile gas transportation equipment
Why Type 1 CNG Cylinders?
Compared with composite alternatives, Type 1 CNG cylinders provide an economical and highly durable solution for commercial fleets and industrial applications. Their robust steel construction offers excellent resistance to mechanical damage, simplified maintenance, and a long operational lifespan, making them a preferred choice for buses, logistics vehicles, and public transportation fleets worldwide.
Why Partner with BluNet?
With years of experience in pressure vessel manufacturing, BluNet supplies CNG storage solutions to customers worldwide. Our engineering team supports OEM customization, project-specific requirements, and international certification needs. Whether you require standard cylinders or customized Type 1 CNG tanks, we deliver reliable products backed by professional technical support, strict quality control, and competitive factory pricing.
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