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问题	气体管道保压标准 -法律知识
释义	法律分析: 施工结束后，用高纯氮气进行检漏保压测试，测试压力应为工作压力的1.25倍。试压规定时间后，压力表读数变化小于0.5%(根据GB金属工业管道施工及验收标准)。法律依据: 《压力管道安全技术监察规程——工业管道》第九十条 1.15倍的设计压力，达到1.15倍的设计压力后稳压10分钟，降压至设计压力后保压30分钟，以无泄漏无变形为合格 (涂抹发泡剂如肥皂)。
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