Ethylene Gas Cylinder for Sale | High Purity & Top Safety

We primarily use high-strength seamless steel alloys like 34CrMo4 or 37Mn. These Chromium-Molybdenum steels are chosen for their exceptional tensile strength, which allows them to safely contain high-pressure gases, and their excellent toughness, which provides resistance to fractures. Furthermore, they exhibit good resistance to the potential for hydrogen embrittlement, a critical safety factor when storing hydrocarbon gases like ethylene.

While the base cylinder construction is often similar (high-pressure seamless steel), an ETO gas cylinder may have specific considerations. Ethylene Oxide (ETO) is often mixed with a stabilizer like CO₂ or HFCs and is more reactive and toxic than pure ethylene. Therefore, cylinders intended for ETO service might require specific valve materials or internal treatments to ensure long-term compatibility and prevent catalytic decomposition of the ETO. The intended service gas must always be clearly marked on the cylinder.

The ethylene gas cylinder price is influenced by several key factors: 1) Raw Material Costs: The market price of high-grade seamless steel. 2) Cylinder Capacity: Larger cylinders require more material and processing. 3) Pressure Rating: Higher pressure ratings (e.g., 200 bar vs. 150 bar) require thicker walls or stronger alloys. 4) Certifications: Cylinders requiring multiple international certifications (e.g., DOT and TPED) involve more extensive testing and documentation. 5) Customization: Custom colors, valves, or markings can add to the cost. 6) Order Volume: Larger orders typically benefit from economies of scale.

Safety is paramount. Always store cylinders in a well-ventilated, dry, secure area away from heat sources, sparks, and flammable materials. Cylinders must be stored upright and secured with a chain or strap to prevent falling. Use a proper cylinder cart for transport, never roll or drag them. Always have the valve protection cap in place when the cylinder is not in use. Ensure all personnel are trained on the specific hazards of ethylene, including its flammability and asphyxiant properties, by consulting its Safety Data Sheet (SDS).

Our cylinders are designed for a long service life, typically 15-20 years or more. However, regulations (like those from DOT in the US) mandate periodic requalification. This typically involves a visual inspection and a hydrostatic test every 5 or 10 years, depending on the cylinder type and its service. The requalification date is stamped onto the cylinder shoulder. This process ensures the cylinder remains safe for continued service.

Hydrostatic testing is a non-destructive test used to verify the structural integrity of a pressure vessel. The cylinder is filled with water and placed inside a sealed test jacket, which is also filled with water. The cylinder is then pressurized to its specified test pressure (e.g., 250 bar). The pressure causes the cylinder to expand slightly, displacing a small amount of water from the test jacket, which is carefully measured. After releasing the pressure, the permanent expansion is also measured. If the total and permanent expansion are within the limits defined by the standard (e.g., ISO 9809), the cylinder passes the test, confirming its strength and elasticity.

The standard valve connection varies by region. In North America, the Compressed Gas Association (CGA) designates CGA 350 for ethylene service. In the United Kingdom, British Standard BS341 No. 4 is common, while in Germany and other parts of Europe, DIN 477 No. 1 is often used. We equip our ethylene gas cylinders with the appropriate valve based on the customer's geographical location and specific requirements to ensure seamless integration with their existing equipment.