GOST 2557
● For medium and low pressure applications only: Working pressure ≤ 1.0 MPa; Burst pressure ≥ 4 times the nominal working pressure; Pulse test ≥ 200,000 cycles (for high-pressure models)
● No metal braided reinforcement layer (none or fiber reinforcement)
● After 72 hours of immersion in gasoline: Volume expansion rate ≤ 25%; Tensile strength retention rate ≥ 80%
● Specialized for conveying petroleum-based liquids: including gasoline, diesel, kerosene, lubricating oil, hydraulic oil and other hydrocarbon media; applicable to oil delivery in oilfield drilling equipment, pipeline systems in oil refineries, and fuel supply pipelines for industrial machinery.
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