强度试验
<b><span style="font-size: 11pt; font-family: 宋体;">埋地管道回填土宜回填至管上方<span lang="EN-US" style="color: red;">0.5m</span><span style="color: red;">以上</span></span></b><span style="font-size: 11pt; font-family: 宋体;">，<b>并<span style="color: red;">留出焊接口</span></b></span><br><!--EndFragment-->
气压试验
<b><span style="font-size: 11pt; font-family: 宋体; color: red;">设计压力≤<span lang="EN-US">0.8Mpa</span></span><span style="font-size: 11pt; font-family: 宋体; color: rgb(255, 192, 0);">（次高压<span lang="EN-US">B</span>上限）</span></b><br><!--EndFragment-->
<span style="font-size: 11pt; font-family: 宋体; color: fuchsia;">除聚乙烯管外</span><span style="font-size: 11pt; font-family: 宋体;">，<b>试验压力为<span style="color: red;">设计输气压力的<span lang="EN-US">1.5</span>倍</span></b>，但不得低于<b><span lang="EN-US" style="color: red;">0.4MPa</span></b></span><br><!--EndFragment-->
<b><span style="font-size: 11pt; font-family: 宋体; color: red;">稳压<span lang="EN-US">1h</span></span></b><br><!--EndFragment-->
水压试验
<b><span style="font-size: 11pt; font-family: 宋体;">管道设计压力<span style="color: red;">＞<span lang="EN-US">0.8MPa</span></span></span></b><br><!--EndFragment-->
<b><span style="font-size: 11pt; font-family: 宋体;">压力不得低于<span lang="EN-US" style="color: red;">1.5</span><span style="color: red;">倍设计压力</span></span></b><br><!--EndFragment-->
<b><span style="font-size: 11pt; font-family: 宋体;">试压宜在<span style="color: red;">环境温度<span lang="EN-US">5</span>℃以上</span>进行</span></b><span style="font-size: 11pt; font-family: 宋体;">，否则应采取防冻措施。</span><br><!--EndFragment-->
<span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">试验压力应逐步缓升，</span><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px; color: red;">首先升至试验压力的<span lang="EN-US">50%</span></span><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">，应进行</span><b style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;"><span style="color: red;">初检</span></b><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">，</span><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px; color: blue;">如无泄漏、异常</span><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">，</span><b style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">继续升压至<span style="color: red;">试验压力</span></b><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">，然后宜</span><b style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;"><span style="color: red;">稳压<span lang="EN-US">1h</span></span></b><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">后，</span><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px; color: blue;">观察压力计</span><b style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;"><span style="color: red;">不应少于<span lang="EN-US">30min</span></span></b><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">，</span><b style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;"><span style="color: blue;">无压力降</span></b><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">为</span><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px; color: red;">合格</span><span style="font-size: 14.6667px; line-height: 22px; text-indent: 29.3333px;">。</span>
严密性试验
<b><span style="font-size: 11pt; font-family: 宋体; color: red;">强度试验合格且燃气管道全部安装完成后</span></b><span style="font-size: 11pt; font-family: 宋体;">进行。若是埋地敷设，<b><span style="color: blue;">必须</span></b><span style="color: red;">回填土至管顶<span lang="EN-US">0.5m</span>以上后</span>才可进行</span><br><!--EndFragment-->
介质是空气
<b><span style="font-size: 11pt; font-family: 宋体; color: blue;">稳压的持续时间</span></b><span style="font-size: 11pt; font-family: 宋体;">应为<b><span lang="EN-US" style="color: red;">24h</span></b>，每小时记录<span style="color: red;">不应少于<span lang="EN-US">1</span>次</span>，<b><span style="color: blue;">修正压力降</span><span style="color: red;">≤<span lang="EN-US">133Pa</span></span></b><span style="color: black;">为合格</span></span><br><!--EndFragment-->
