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一级建造师题库/单项选择题

强度试验在试验压力下稳压分钟无渗漏、无压力降后降至设计压力,在设计压力下稳压分钟,检查无渗漏、无异常声响、无压力降为合格。(  )

  • A10;30
  • B15;60
  • C10;60
  • D15;30
参考答案: A
解题思路: 强度试验应在试验段内的管道接口防腐、保温施工及设备安装前进行,试验介质为洁净水,环境温度在5℃以上,试验压力为设计压力的1.5倍,且不得小于0.6MPa,充水时应排净系统内的气体,在试验压力下稳压10min,检查无渗漏、无压力降后降至设计压力,在设计压力下稳压30min,检查无渗漏、无异常声响、无压力降为合格。>>>立即刷题
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