☑ Seamless steel cylinder for Hydrogen (H₂) gas
☑ Wide capacity range: 1.5L to 150L OEM / ODM
☑ High-pressure rated seamless steel Empty Cylinder Supply
☑ Left-Hand Valve Thread for Flammable Gas
Product Description
Comprehensive product specifications, features, and technical information to help you make the right choice.
| Item | Specification |
| Product Name | RONGHAI seamless high-pressure gas cylinders |
| Gas Type | Hydrogen (H2) |
| Cylinder Material | Seamless Steel |
| Cylinder Standard | GB/T 5099.1/.3 ISO9809-1/-3 (subject to final certificate) |
| Water Capacity | 1.5-150L（ 2L / 4L/ 5L / 6L / 10L / 12L / 15L / 20L / 30 / 40L / 45L / 50L etc.） |
| Working Pressure | 15~20 MPa (150~200 bar) |
| Test Pressure | 22.5~30 MPa |
| Cylinder Material | 37Mn / 34CrMo4 seamless steel |
| Wall Thickness | 2.8–6.2 mm (capacity dependent) |
| Surface Treatment | Powder coating / painted (color customizable) |
| Valve Type | Pressure-retaining valve |
| Refillable | Yes |
| Filling gas | Oxygen, nitrogen, argon, CO2, helium, mixed gases |
| Pressure Test | 1.5 times the working pressure |
| Certification | CE/DOT/ISO/ TPED |
| Application | Metal Processing & Heat Treatment / Electronics, Semiconductor & Photovoltaic / Chemical Processing & Oil Hardening Power Generation & Industrial Gas Supply |
Product Features:
Seamless forged steel construction, compliant with ISO 9809 / GB/T 5099 for repeated high-pressure filling and long service life.
Hydrogen service conditional on material compatibility testing（ISO 11114-4）Has the basis for hydrogen embrittlement evaluation, confirmed in a written report.
Left-hand valve thread for flammable gas service Essential safety equipment for Class 2.1 gases; specific threads follow the standards of the destination country.
Three-material system: 37Mn (15 MPa) / 34CrMo4 (17–20 MPa) / 30CrMo Match according to working pressure and filling amount.
1.5× hydraulic test pressure margin every cylinder hydro-tested before leaving the factory for safe, reliable long-term service.
Low residual moisture / clean internal preparation suited to high-purity hydrogen filling, Empty Cylinder Supply.
Full volume coverage 2L–150L standard and high-pressure grades to fit laboratory, plant and manifold supply needs.
OEM / ODM with destination-market valve threads and colour marking , according to the target country's market and the gas configuration, valve interface, and cylinder color/valve shoulder markings, including flammable gas labeling standards.
Why You Should Choose Ronghai?
Global Logistics
Our own logistics network delivers door-to-door from regional warehouses in EU, US and Australia.
Quality Assurance
ISO 9001 certified with full-batch factory inspection for standard, stable and reliable products.
Production Capacity
Complete production lines and testing equipment across our modern manufacturing base.
R&D & Engineering
In-house design and engineering team launches new products and specifications quickly.
Why Choose Ronghai OEM Cream Chargers?
From certification and quality control to customization and after-sales — factory-direct supply changes everything compared with ordinary suppliers.
- ✓Verified International Certifications
Full suite including ISO 11118, ISO 9001, DOT, TPED/PED and CCS, with certificate documents shipped with every order.
- ✓100% Batch Inspection
Every cylinder is pressure-tested and leak-checked before shipping — full batch inspection, not random sampling.
- ✓Food-Grade Materials
Food-grade steel & aluminum with traceable sources, meeting international hygiene and safety standards.
- ✓Flexible OEM / ODM Customization
Custom branding, body colors, flavor labels and packaging — small trial orders welcome.
- ✓Stable Capacity & Lead Time
Integrated factory production from samples to full container loads, with no gaps during peak seasons.
- ✓Global After-Sales & Documentation
SDS, COA, certificates of origin and other export documents, with responsive after-sales support.
- ✓One-Stop Procurement
Cream chargers, steel cylinders, medical oxygen cylinders and accessories from a single supplier.
- ✕Missing or Unverifiable Certifications
Missing, expired or hard-to-verify certificates — compliance risk falls on the buyer.
- ✕Sampling Instead of Full Inspection
Random or no inspection at all — inconsistent pressure and sealing within a single batch.
- ✕Unknown Material Quality
Unclear material grades and untraceable sources create potential safety and hygiene risks.
- ✕Limited Customization, High MOQ
Standard products only, with limited colors, labels and packaging, and higher minimum orders.
- ✕Unstable Capacity & Delays
Stock-outs in peak season and delayed delivery disrupt your market supply plan.
- ✕Slow After-Sales & Missing Documents
Incomplete export documents and slow responses make issues harder to resolve.
- ✕Multi-Supplier Coordination
Cylinders and accessories from different vendors mean extra coordination in sourcing, QC and logistics.
Real Questions Buyers Ask
Browse frequently asked questions — product specs, OEM customization, wholesale terms, export logistics and compliance.
Can I order products under my own brand?
Absolutely. Private label and OEM manufacturing are core services of ours. We can print your logo, apply your packaging artwork and even customize cylinder colors, caps and flavor cards to match your brand identity.
What is the MOQ for a custom OEM order?
For fully customized Cream charger packaging, the MOQ starts at one 20-foot container, with mixed SKUs allowed. For large cylinders, the MOQ is typically 500 units per size for custom labels and one 20-foot container for fully custom-printed cartons. Your sales manager will confirm the exact figures for your project.
Which parts of the product can be customized?
- Logo and artwork printing on chargers and cylinders
- Gift box and master carton design
- Cylinder body color, cap and nozzle color
- Flavor selection and multilingual manuals
- Barcode/EAN labels and pallet marking
What artwork files do you need from us?
Please provide vector files in AI, EPS or print-ready PDF format in CMYK with all text converted to outlines. We supply the exact dieline templates and safe-zone guides so your designer can set the artwork up correctly.
Is there a minimum or maximum order quantity?
Regular wholesale orders start at 100 cartons per SKU, and there is no upper limit. Container orders (20ft or 40ft HQ) receive the best unit pricing, and mixed models or flavors are welcome.
Do you offer special pricing for distributors?
Yes. Pricing is tiered by order volume and partnership level, and qualified distributors receive annual rebates, marketing support and regional protection. Send us your target quantities and we will quote within 24 hours.
What payment terms do you accept?
For bulk production we accept T/T with a 30% deposit and 70% balance against the bill of lading copy, or an irrevocable L/C at sight. Sample and small orders can be paid via PayPal, Western Union or trade-assurance platforms.
Can I request samples before placing a bulk order?
Yes. Stocked samples are dispatched within 3 working days and usually arrive in 5 to 7 days by express. Sample and freight charges are refundable once the first bulk order is confirmed.
How long will it take to receive my bulk order?
For CIF terms, due to commodity inspection by customs, it usually takes 7 to 15 days to ship to your freight forwarder after production is completed. Total door-to-door transit is typically 25 to 40 days depending on the destination port.
Which shipping methods are available?
Bulk orders ship by sea as FCL or LCL; urgent small orders and samples can go by international express (DHL, FedEx, UPS). Rail transport is also available for certain European and Central Asian destinations.
How is nitrous oxide classified for transport?
N2O ships under UN 1070 as a Class 2.2 non-flammable, non-toxic compressed gas, with the applicable oxidizer (5.1) subsidiary handling requirements. All cartons, cylinders and pallets carry the correct dangerous-goods marks and labels.
Do you provide dangerous-goods shipping documents?
Yes. We supply the full document package, including SDS/MSDS, dangerous-goods declaration, IMO declaration, packing list, commercial invoice, certificate of origin and bill of lading, through qualified dangerous-goods forwarders.
What certifications do Ronghai products hold?
Our factories operate under ISO 9001 quality management and HACCP/FSSC 22000 food-safety systems, and the gas and pressure containers are produced under TPED and applicable international transport requirements. Full certificates are available from your sales manager.
Is your nitrous oxide genuinely food grade?
Yes. The gas is certified food additive E942 with a minimum purity of 99.95%, produced and filled under food-safety controls. Every production batch is tested for purity and moisture and comes with a batch COA.
Which documents can you provide for customs clearance?
- Certificate of origin and commercial invoice
- Packing list and bill of lading
- SDS/MSDS and batch COA
- Food-grade statement
- Health/free-sale and third-party inspection certificates where required
Are the steel cylinders certified for pressurized transport?
Yes. Cylinders are manufactured under the EU TPED framework for transportable pressure equipment and meet the applicable UN cylinder requirements; U.S.-bound shipments follow the relevant DOT transport provisions.
Request A Quote
Tell us about your needs and our team will respond within 24 hours with a tailored solution.
Complete Customized Solutions
From product planning to global delivery, our in-house design and engineering team has produced countless great solutions for customers across food service, beverage and medical industries.
- ✓Planning proposal: product planning proposal
- ✓Trial production: until the customer is convinced
- ✓Evaluation: confirmation of samples, colors and packaging
- ✓Quotation, Order, Delivery
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