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国家标准GB17258《汽车用压缩天然气钢瓶》规定,汽车盛装燃料压缩天然气的钢瓶,工作压力为20MPa,实际爆破压力应不小于48MPa,即爆破安全系数不应小于48/20=2.4。爆破安全系数表示气体金属容器爆破时,其承压应至少是工作压力的多少倍。为简单起见,本文将爆破安全系数简称为爆破系数(Burst Ratio)。
National standard GB17258 “Compressed Natural Gas Cylinders for Automobiles” stipulates that the car contains compressed natural gas cylinders with a working pressure of 20MPa and an actual burst pressure of not less than 48MPa, ie, the blasting safety factor should not be less than 48/20 = 2.4. The safety factor for blasting means that the pressure of gas metal container should be at least multiples of the working pressure when blasting gas metal container. For simplicity, the blasting safety factor is simply referred to as the Burst Ratio.