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Premium Calcium Carbide Stone for Custom Acetylene Gas Production. High Gas Yield: Typical gas yield ranges from 295 to 310 liters per kilogram. Strict Quality Control: Multiple sampling tests and air pressure drum seals ensure safety and accuracy. Standard Compliance: Production strictly follows Chinese National Standard GB10665-2004. Certified Purity: Product purity is 99% with SGS, BV, and ISO certifications. Fast Delivery: Delivery usually completed within 20 days after deposit or L/C. Large Capacity: Monthly production capacity reaches 6000 tons. OEM/ODM Service: Both OEM and ODM services are available for customization. Global Shipping: Export ports include Tianjin, Shanghai, and Qingdao.