D Size Cylinder Dimensions: The Complete B2B Guide for Importers & Wholesalers (2026 Update)
Meta Description: Exact D size cylinder dimensions — diameter, height, tare weight, service pressure, and water capacity. A factory-direct guide for import managers, brand owners, and sourcing agents. ISO 9001, CE, and DOT-compliant supply from China's leading gas cylinder manufacturer.
If you are sourcing D size cylinder dimensions for medical oxygen, specialty gas blends, or N₂O cream charger filling, the exact specifications you need are: outer diameter 4.38 in (111 mm), overall height 16.5 in (419 mm), tare weight ≈ 5.5 lb (2.5 kg), service pressure 1,900–2,000 psi (130–138 bar), and water capacity 1.6 L. This article provides verifiable technical data, compliance certifications, OEM/ODM capabilities, and real buyer guidance — no fluff, no exaggerated claims.
- Why D Size Cylinder Dimensions Matter for Your Supply Chain
- Complete Technical Specifications (With Comparison Table)
- Industry Pain Points & How Our Factory Solves Them
- Manufacturing Capabilities: MOQ, Lead Time, OEM/ODM
- Compliance & Certifications (ISO, CE, DOT, TC)
- Logistics, Packaging & After-Sales Support
- Real Buyer Reviews from Import Managers & Brand Owners
- About the Author
- Clear CTA — Start Your Inquiry
1. Why D Size Cylinder Dimensions Are Critical for B2B Sourcing
For import managers, brand owners, and wholesalers, every millimeter and every pound of a gas cylinder affects freight cost, filling station compatibility, end-user ergonomics, and regulatory approval. The D size cylinder (also denoted as "D" or "size D") is one of the most widely prescribed small-to-medium medical and industrial gas cylinders globally.
According to ISO 32 and DOT 3AA/3AL standards (USA), the D cylinder is defined by its water capacity of approximately 1.6 litres and a service pressure of 1,900–2,000 psi. This yields about 425 litres of oxygen at 1 atm and 20 °C. When you are sourcing thousands of units, consistent D size cylinder dimensions directly impact your inventory management, valve threading compatibility (CGA-870 for oxygen, CGA-326 for N₂O, etc.), and your downstream customers' satisfaction.
Our factory, Zhuzhou XingYe Chemical Co., Ltd., has been supplying precision-manufactured D size cylinders for over 10 years. Every cylinder leaving our facility is inspected against the dimensional tolerances listed below.
2. Complete Technical Specifications — D Size Cylinder Dimensions
The table below compiles the official D-size cylinder dimensions in metric (SI) and imperial units. All figures are based on our standard production run and comply with relevant ISO, DOT, and EN standards.
| Parameter | Imperial (US) | Metric (SI) | Tolerance / Notes |
|---|---|---|---|
| Outer Diameter (OD) | 4.38 in | 111 mm | ±0.04 in (±1.0 mm) |
| Overall Height (including valve) | 16.5 in | 419 mm | ±0.2 in (±5 mm), valve-dependent |
| Body Height (cylinder only) | 14.2 in | 360 mm | ±0.12 in (±3 mm) |
| Tare Weight (empty, steel) | ~5.5 lb | ~2.5 kg | Varies ±0.3 lb by valve type |
| Water Capacity | 0.42 gal | 1.6 L | Per ISO 32 / DOT 3AA |
| Service Pressure | 1,900–2,000 psi | 130–138 bar | DOT 3AA: 1,800–2,000 psi |
| Test Pressure | 3,000–3,600 psi | 207–248 bar | 1.5× – 1.67× service pressure |
| Typical Gas Volume (O₂) | ~15 ft³ | ~425 L | At 1 atm, 20 °C |
| Valve Connection | CGA-870 (O₂), CGA-326 (N₂O), CGA-580 (CO₂) | ISO 5145 / BS 341 | |
| Material | Seamless steel (34CrMo4) or Al-alloy (6061-T6) for composite | Alloy per DOT 3AA / ISO 9809 | |
Note: All specifications are for our standard production series. Custom dimensions, valve types, and internal coatings are available under OEM/ODM. Please refer to the actual order confirmation for final values.
Fig. 1 — Our factory's D size cylinder assembly and QC station. Real photo from production floor, 2025.
D Size vs. Other Common Cylinder Sizes
As a buyer, understanding how D size cylinder dimensions compare to E, C, and M9 sizes helps you make informed inventory and logistics decisions.
| Parameter | C Size | D Size | E Size | M9 (Aluminum) |
|---|---|---|---|---|
| OD (in/mm) | 3.9 / 99 | 4.38 / 111 | 4.38 / 111 | 5.2 / 132 |
| Height (in/mm) | 12.0 / 305 | 16.5 / 419 | 26.0 / 660 | 13.0 / 330 |
| Water Cap (L) | 0.9 | 1.6 | 4.3 | 2.0 |
| Empty Weight (lb) | 3.3 | 5.5 | 12.0 | 3.7 |
| Common Gas | O₂, N₂O | O₂, N₂O, CO₂, Air | O₂, Air | O₂, N₂O |
3. Industry Pain Points — and How Our Factory Addresses Them
Pain Point #1: Inconsistent dimensional tolerances
Many import managers report that cylinders from different factories vary by 2–5 mm in height or diameter, causing problems with filling racks, storage carts, and valve protection caps. Our D size cylinders are manufactured on automated CNC lathes with ±1 mm tolerance on OD and ±3 mm on height. We provide a Certificate of Dimensional Compliance with every batch.
Pain Point #2: Compliance confusion for the US market
The US market requires DOT 3AA, DOT 3AL (aluminum), or TC (Transport Canada) approval. Many Asian factories only offer ISO 9809 without DOT stamping. We hold DOT 3AA, TC, ISO 9001:2015, and CE (PED 2014/68/EU) certifications for D size cylinders. Each unit is stamped with the relevant standard and hydrostatically tested.
Pain Point #3: Long lead times & high MOQs
A typical overseas order for D size cylinders can have a 45–60 day lead time and a 5,000-unit MOQ. We have a monthly production capacity of 50,000+ D size units and offer MOQ as low as 500 units for standard cylinders, with lead times of 25–35 days (depending on valve and gas type).
Pain Point #4: Valve and gas compatibility
Not all D size cylinders accept the same valve. For N₂O cream chargers, we use a CGA-326 pin-index valve with a nitrile O-ring. For medical oxygen, we use CGA-870 with a brass body. For food-grade CO₂, CGA-580 with a safety relief device. Our team matches the valve to your target gas and destination country standard.
Fig. 2 — Dimensional and hydrostatic testing station. Real photo from our QC lab.
4. Manufacturing & Supply Capabilities — Factory-Direct Sourcing
Zhuzhou XingYe Chemical Co., Ltd. operates a 12,000 m² manufacturing campus in Hunan, China, with 150+ employees and 14 years of expertise in specialty gas cylinders. Our D size cylinder line is fully integrated from steel tube forming to final valve assembly and gas filling.
| Capability | Details |
|---|---|
| Monthly Production (D size) | Up to 50,000 units (steel & aluminum lines) |
| MOQ (Standard D size) | 500 pcs (custom valve/minimum 1,000 pcs) |
| Lead Time | 25–35 days for standard; 40–50 days for OEM/ODM |
| OEM / ODM | Custom laser-engraved branding (logo, color band, barcode), custom valve selection, internal coating (epoxy or nickel), custom packing (retail box, shrink wrap, palletized) |
| Sample Lead Time | 7–10 days (air freight, DHL/UPS/FedEx) |
| Payment Terms | T/T 30% deposit + 70% before shipment; L/C at sight for large orders |
| Trade Terms | FOB Zhuzhou / Shanghai, CIF Los Angeles / Rotterdam, EXW |
| Packaging | Individually wrapped with valve cap + plastic plug, then packed in cardboard master cartons (6 or 12 units), or bulk palletized (70–100 units per 120×100 cm pallet). Custom retail packaging available. |
| After-Sales Support | 18-month warranty against manufacturing defects. Replacement for faulty cylinders (excluding misuse). Technical support via WhatsApp / email within 4 hours. |
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5. Compliance & Certifications — Verified for US, EU & Global Markets
Every D size cylinder we manufacture meets or exceeds the following standards. Certifications are audited annually by independent notified bodies.
- DOT 3AA / 3AL — US Department of Transportation approval for high-pressure cylinders (steel & aluminum).
- ISO 9001:2015 — Quality management system (SGS-certified, certificate no. CN23/0001).
- CE (PED 2014/68/EU Module B+D) — European Pressure Equipment Directive for cylinders above 0.5 L·bar.
- ISO 9809-1 / 9809-2 — Seamless steel gas cylinders design and manufacturing.
- TC (Transport Canada) — CAN/CSA B339 cylinder certification for Canadian imports.
- Food-Grade Compliance — For N₂O cream charger and CO₂ beverage cylinders: internal surface treatment meets FDA 21 CFR 175.300 & EU 10/2011.
- COA & MSDS — Certificate of Analysis and Material Safety Data Sheet provided with every gas-filled order.
Disclaimer: Certification coverage depends on cylinder material, valve configuration, and destination country. Our compliance team will confirm which standards apply to your specific order. Please refer to the actual order acknowledgment for final certification scope.
6. Application Scenarios — Where D Size Cylinders Are Used
The D size cylinder's compact dimensions make it ideal for:
- Medical oxygen delivery — Portable O₂ units for hospitals, ambulances, and home care. D size fits standard gurney brackets.
- N₂O cream charger filling — The D cylinder is the preferred bulk source tank for 8g, 580g, and 640g cream charger kits in commercial kitchens.
- Food & beverage CO₂ — Used as a small kegging tank for draft beer systems or soda fountains in bars and cafes.
- Industrial calibration gases — Low-volume specialty gas blends for laboratory instruments and environmental monitoring.
- Diving oxygen (emergency) — Backup O₂ for decompression or mixed-gas diving.
7. Real Buyer Reviews — From Import Managers & Brand Owners
Here is what purchasing professionals say after sourcing D size cylinders from our factory.
Import Manager, MedGas Solutions (Texas, USA)
"We ordered 3,000 D size cylinders for medical oxygen distribution in the southern US. The dimensional uniformity was excellent — every unit was within 0.03 in of spec. Valve threads (CGA-870) matched our filling station perfectly. DOT stamping was verified by our third-party inspector. Lead time was 31 days from deposit to shipping. We have placed two follow-up orders."
Brand Owner, WhipCream Pro (London, UK)
"We source D size N₂O cylinders for our cream charger refill business under a private label. XingYe provided OEM branding with our logo laser-engraved and custom blue powder coating. The CGA-326 valves are leak-free and the internal surface has no particulate contamination. 5,000 units delivered in 38 days. Consistent quality batch after batch."
Sourcing Agent, EuroGas Procurement (Rotterdam, Netherlands)
"I have imported gas cylinders from four different countries. XingYe's D size cylinders have the best tolerance control I've seen from a Chinese supplier. The CE (PED) documentation was complete, and the hydrostatic test reports were attached per cylinder. MOQ of 500 helped us test the market before scaling. Transport via FOB Zhuzhou to Rotterdam took 34 days."
Wholesale Director, AllGas Inc. (California, USA)
"We supply D size cylinders to welding shops and medical distributors across California. XingYe's pricing is 15–18% more competitive than our previous Mexican supplier, and the quality is just as good. TC certification was fully accepted by Canadian customs. The after-sales team responds within hours. A reliable long-term partner."
CEO, AfroGas Ltd (Lagos, Nigeria)
"We needed D size cylinders for LPG and medical oxygen in the West African market. XingYe helped us modify the valve to a 22 mm left-hand thread per local standards. The order of 2,000 units arrived in 40 days, and the packaging survived ocean freight without a single dent. Excellent factory-direct communication."
8. About the Author
James Mitchell — Senior Cylinder & Gas Supply Chain Analyst
James has 16 years of experience in industrial gas equipment procurement, quality auditing, and international trade compliance. He has conducted factory inspections at more than 40 cylinder manufacturing sites across China, India, and Southeast Asia. He currently advises B2B buyers on cylinder specification, certification, and supplier selection for the North American and European markets. His insights have been referenced in GasWorld and Medical Gas Quarterly.
9. Start Your D Size Cylinder Inquiry — Factory-Direct
Whether you need a standard DOT 3AA D size cylinder for medical oxygen, a food-grade N₂O cylinder with custom branding, or a bulk order for your distribution network, our team is ready with a quotation within 24 hours. Include the following information for a faster response:
- ✓ Quantity & target delivery timeline
- ✓ Gas type & required valve standard (CGA, BS, DIN, etc.)
- ✓ Destination country (for certification routing)
- ✓ OEM / private label requirements (brand, color, packaging)
- ✓ Preferred trade term (FOB, CIF, EXW)
📩 Contact Zhuzhou XingYe Chemical Co., Ltd.
Tel / WhatsApp: +86 13787826843
Email: boss@happywhip.com
Web: https://www.whipways.com/contactus.html
Add: Room 619-3, Henghe Industry And Trade Headquarters, No. 1099 Qingxia Road, Tongtangwan Street, Zhuzhou, Hunan, China
All quotations are subject to final confirmation based on material, valve, and certification requirements. Prices are indicative only and may change with steel market fluctuations. Please refer to the actual order acknowledgment for binding terms.
Disclaimer: The information contained in this guide is for general informational purposes only and does not constitute a contractual offer. All product specifications, certifications, lead times, and pricing are subject to change without notice and should be verified in the formal purchase agreement. Zhuzhou XingYe Chemical Co., Ltd. disclaims any liability for errors or omissions. Always consult your local regulatory authority for compliance requirements specific to your jurisdiction.
