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地下煤气管道的工程质量是通过强度试验和气密性试验来确定的。气密性试验通常是在管道加压2～3小时后,测定24小时管道内气体的压力和温度,然后将实际测定的管道压力降与允许的管道压力降进行比较。若实际压力降不超过允许的压力降,气密性试验算合格。 一、实际压力降计算式温度修正情况 目前,已知的使用较多的实际压力降计算公式,尽管表达方式不一样,但可归纳为以下几种:
The quality of underground gas pipelines is determined by strength tests and tightness tests. The airtightness test is usually performed by measuring the pressure and the temperature of the gas in the pipe for 24 hours after the pipe is pressurized for 2 to 3 hours and then comparing the actually measured pipe pressure drop with the allowable pipe pressure drop. If the actual pressure drop does not exceed the allowable pressure drop, air tightness test qualified. First, the actual pressure drop calculation temperature correction At present, the known use of more actual pressure drop calculation formula, although the expression is not the same, but can be summarized as the following: