Oxygen cylinder 50l manufacturers

When sourcing a 50L oxygen cylinder, you must verify the working pressure (typically 150 bar to 200 bar) and the test pressure (usually 1.5x the working pressure). The material is paramount; ensure it is made from high-quality seamless steel (37Mn or 34CrMo4) or aluminum alloy 6061 for lightweight needs. Additionally, confirm the water capacity is exactly 50 liters and check the valve type (e.g., QF-2, CGA540, or Bullnose) to ensure compatibility with local regulators.

Oxygen cylinders are classified as dangerous goods and must adhere to strict global standards. You should prioritize suppliers who provide ISO 9809-1/3 or EN ISO 9809 certifications for steel cylinders. For the North American market, DOT-3AA approval is required, while the European market necessitates the TPED (Pi mark) or CE (PED) certification. Always request a Batch Test Report and a Third-Party Inspection Certificate (such as TUV, SGS, or BV).

Safety is verified through specific testing protocols. Ensure the supplier performs ultrasonic flaw detection, hydraulic expansion testing, and leakage tests on every unit. The exterior should have a high-quality anti-corrosive powder coating or paint (usually green for US or white/black-white for international standards) to prevent rust. For medical-grade oxygen, the internal cleanliness must meet specialized standards to prevent contamination.

A 50L cylinder is a high-capacity vessel primarily used for industrial welding/cutting, medical oxygen supply in hospitals, and aquaculture aeration. For medical use, the cylinder must be degreased and cleaned for oxygen service. For industrial use, focus on the stability of the cylinder base and the robustness of the valve protection cap to prevent accidental shearing during transport.

Oxygen cylinders are categorized as Class 2.2 (Non-flammable gas) or Class 2.2/5.1 (Oxidizer) under the IMDG code. They must be shipped in ventilated containers with proper Dangerous Goods (DG) declarations. Most buyers prefer to ship them empty to reduce freight costs and simplify customs clearance, as shipping filled cylinders requires specialized hazardous materials handling and significantly higher insurance premiums.

When communicating with suppliers on Made-in-China.com, use the Audit Reports provided by the platform to verify the factory's manufacturing license. Negotiate a milestone payment structure (e.g., 30% deposit, 70% after third-party inspection but before loading). Explicitly include a clause that any cylinder failing the local hydrostatic test upon arrival will be replaced or refunded.

The primary risk is non-compliance with local pressure vessel regulations, which can lead to customs seizure or refusal of local gas stations to refill the tanks. Another risk is valve leakage due to poor assembly. To mitigate this, always specify the stamp markings required by your country (e.g., manufacturing date, serial number, and inspector's mark) to be engraved on the cylinder shoulder before production.

Utilize the Secured Trading services offered by Made-in-China.com to protect your funds. Avoid transferring money to private bank accounts; always use the company’s official corporate account verified by the platform. Request a video inspection of the actual production line and the specific batch of cylinders being prepared for your order to ensure the supplier is a legitimate manufacturer and not a middleman.