| 1. | As a practical matter, most scientific Wikipedia articles such as Explosive limit are reliable.
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| 2. | The lower explosive limit is 5 % methane and the upper is 15 % methane.
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| 3. | But there is both an upper explosive limit and a lower explosive limit with most combustible vapors.
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| 4. | If there is too little methane to explode, then the atmosphere is below the Lower Explosive Limit.
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| 5. | But there is both an upper explosive limit and a lower explosive limit with most combustible vapors.
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| 6. | The interval in which an air / gas mix can burn is limited by the explosive limits of the air.
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| 7. | At levels of 1000 ppm, 10 % of the lower explosive limit, naphtha is immediately dangerous to life and health.
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| 8. | Many ignitable liquids have high vapor pressures, low flash points and a relatively wide range between their upper and lower explosive limit.
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| 9. | At a high level of the gas the Upper Explosive Limit is reached, and above that the mixture is too rich to explode.
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| 10. | The first is a possible explosion if the mixture of LPG and air is within the explosive limits and there is an ignition source.
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