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The 3L medical steel mini oxygen cylinder is designed for high performance and durability. Made from premium seamless steel pipe, it ensures consistent height, smooth painting, and excellent properties. It's widely used in industries such as steel cutting, welding, electronics, and medical applications. This cylinder is ideal for repeated use to store argon gas, commonly used in various industrial and medical fields.
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Outside diameter (mm) | 108 |
Water capacity (L) | 3 |
Height (mm) | 437 |
Weight (kg) | 4.9 |
Design wall thickness (mm) | 2.9 |
Working Pressure (MPa) | 15 |
Material | 37Mn |
Head Protection | Tulip Cap or Common Cap |
Cylinder Color | As Clients Require |
Certification Provided | ISO9809/TPED/DOT |



2. Gas Cylinder Process

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3. Company ProfileBased in Shanghai, SEFIC is a professional supplier of gas and gas equipment. Established in the 1990s, the company has accumulated extensive experience and is now one of the leading suppliers of various types of gas and gas equipment. SEFIC was among the first in the country to obtain licenses for Pressure Vessel Type A2 and C2, along with ISO9001 and ISO14000 certifications, as well as recognition as a Private Hi-Tech Enterprise and Special Equipment Manufacturer. The company provides a wide range of gas cylinders with certifications such as TUV, TPED, CE, and DOT.
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SEFIC certificate of the gas cylinder
With over 30 years of experience in the gas equipment industry, SEFIC has built a strong global reputation. Our products have satisfied customers across more than 50 countries worldwide. The business has expanded globally, reaching regions such as the US, EU (mainly Germany, Portugal, Romania, and Bulgaria), South America (mainly Chile, Peru, and Bolivia), and Africa (mainly Angola and South Africa).
SEFIC gas cylinders have served customer satisfaction from more than 50 countries
We also display common steel cylinder samples in our headquarters office to help customers view and learn more about our products. If you need information on steel or aluminum cylinders, we provide catalogues and samples. We welcome calls, emails, or visits to our official website: www.sefic.com.cn, or leave messages on the product page. SEFIC is always ready to serve you!
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SEFIC gas cylinder sample display area
SEFIC has extensive experience in business operations and management, with the capability to process various gas cylinders. We have adopted certifications from ISO, DOT, TC, TUV, KGS, and others. Adhering to the corporate philosophy of "regard quality as credit, credit as brand, and brand as life," and "repeat simple things, do them with heart, and produce quality goods through concentration." With safe and reliable products and quality service, SEFIC has established a good corporate image and received industry recognition and praise.
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General situation of SEFIC gas cylinder production workshop
In 2005, SEFIC aimed to transform into a gas project solution provider and expand globally by growing from a gas equipment manufacturer. We established overseas marketing teams and provided gas equipment and technical support to new plants, which helped us grow significantly.
SEFIC sales team for foreigners
With high-quality products, competitive pricing, fast delivery, and superior service, SEFIC has earned the trust and praise of its customers. Since 2005, SEFIC has established trade relations with over thirty thousand customers across more than 50 countries and regions. Many of our VIP clients have visited SEFIC multiple times and discussed regional agency services with us. Currently, SEFIC has established product agency services in Italy, Saudi Arabia, South Africa, Uganda, Cambodia, Kuwait, Iran, Malaysia, and other countries. Cooperation with SEFIC offers the following advantages:
HIGH QUALITY SEFIC has implemented a strict and complete quality control system, ensuring that each gas cylinder meets customer requirements and is thoroughly inspected before shipment. |
LOWER PRICE SEFIC consistently offers competitive prices! We continuously seek ways to reduce costs and provide our customers with cost-effective solutions. Partner with SEFIC, choose a trustworthy partner! |
QUICK DELIVERY TIME We are committed to ensuring safe and timely delivery of all shipments, with many partners providing fast transportation options. |
GOOD SERVICE SEFIC offers different series and models tailored to standards in various countries, and we are dedicated to providing the best service. Partner with SEFIC, choose a trustworthy partner! |
ORIGINAL Manufacturer Partnering with SEFIC allows direct sales from the manufacturer to the customer, improving production and delivery efficiency. |
LARGE OUTPUT SEFIC has advanced equipment for gas cylinder production, capable of manufacturing over 50,000 units per month. |
EXPORTING Experience SEFIC maintains a strict and comprehensive quality control system to ensure all cylinders meet customer quality requirements and are thoroughly inspected before shipping. |
OEM ACCEPTED We accept OEM orders, allowing us to manufacture gas cylinder handles, caps, valves, markings, and colors according to your specifications. |
4. Contact Us
Manager: David
   Tel: 0086-21-6601 9677
M.P: 0086-180 1766 2601Â Fax: 0086-21-6601 9679
    Web: www.sefic.com.cn
ADD: NO.6598., Hutai Road, Baoshan district, Shanghai, China 201908
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Liaoning Kelong Fine Chemical Co.Ltd. , https://www.kelongchemy.com