“水压试验”改“气压试验”时是否考虑温度系数的思考

Whether the Temperature Coefficient should be Considered in the Change from Hydraulic Test to Pneumatic Test

在压力管道的实际检验或安装过程中,由于受现场的具体环境、位置、装备等诸多因素的影响,有时候本应做水压试验的,不得不改为做气压试验。按《压力管道规范——工业管道》(GB/T 20801—2006)和《压力管道安全技术监察规程——工业管道》(TSG D0001—2009)规定的压力试验公式,在计算气压试验压力值时,标准没说明需不需要考虑温度系数,但水压试验计算是考虑了温度系数的,这给大量的安装技术人员和检验人员带来疑惑,不知道具体在计算气压试验的试验压力值时是否该考虑温度系数,因此给安装和检验工作带来极大的不便。本文针对这一情况进行了分析。

In the actual inspection or installation process of the pressure pipeline,the pressure test project should sometimes be subjected to the hydraulic pressure test.Due to the influence of the specific environment,location,equipment and other factors on the site,it has to be changed to the air pressure test.According to the pressure test formula specified in Pipeline Specification—Industrial Pipeline(GB/T 20801—2006)and Pipeline Safety Technical Supervision Regulations—Industrial Pipeline(TSG D0001—2009),when calculating the pressure test,it is not stated whether the temperature coefficient should be considered.However,the temperature coefficient is considered in the calculation of the hydraulic pressure test.Therefore,it brings great inconvenience to the installation and inspection work.