DOT/ISO Certified Argon Nitrogen Tank, B-Size Portable Welding Gas Cylinder (Empty)

Product Description This 40 cu.ft steel inert gas cylinder delivers professional-grade performance for TIG welding, MIG welding, metal fabrication and various industrial processes. Featuring a B-size portable design (7" diameter × 22.3" height, 29 lb), it strikes an optimal balance between storage capacity and mobility for on-site or workshop use. Equipped with a pre-tested CGA580 valve, it supports multiple inert gases including argon, nitrogen, helium and neon, as well as CO₂/nitrogen mixes. The standard 3/4" NGT threading ensures compatibility with most common CGA580 regulators, offering versatile shielding gas solutions for different welding applications. Built to strict safety standards, the cylinder is constructed from heavy-duty thick-walled steel with a corrosion-resistant painted finish, hydro-tested within the last 12 months and fully certified to DOT and ISO/UN specifications. With a service pressure of 2524 PSI and a test pressure of 3365 PSI, it provides reliable, high-pressure performance for welding stainless steel, aluminum and other metals, while preventing oxidation during processing. Designed as a refillable cylinder, it arrives empty to comply with shipping regulations, allowing you to fill it at your local compressed gas supplier for consistent, cost-effective gas supply. Whether used in a professional fabrication shop or for mobile welding jobs, this cylinder offers durability, safety and versatility for all your metalworking needs.