千家论坛_智能建筑与智能家居技术交流社区
标题:
关于暖通空调的管径
[打印本页]
作者:
pbenw
时间:
2011-4-16 16:07
标题:
关于暖通空调的管径
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">公称直径</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">(nominal diameter)</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">，又称平均外径</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">(mean outside diameter)</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">。</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US"> <br/></span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">这是缘自金属管的管璧很薄，管外径与管内径相差无几，所以取管的外径与管的内径之平均值当作管径称呼。</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US"> <br/><br/></span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">公称直径是公制</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">mm</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">为基准的，称</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US"> DN (metric unit) <br/></span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">比如</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">DN100</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">的管，如果遇到薄壁管，它得内径就会大于</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">100mm</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">，但遇到厚壁管它得内径就会小于</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">100mm</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">。但计算时取</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">100mm</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">。</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt"> </span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">也叫</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">DN100 <br/><br/></span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">因为单位有公制</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">(mm)</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">及英制</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">(inch)</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">的区分，所以有下列的称呼方法。</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US"> <br/><br/>1. </span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">以公制</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">(mm)</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">为基准，称</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US"> DN (metric unit) <br/>2. </span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">以英制</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">(inch)</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">为基准，称</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">NB(inch unit) <br/>3. DN (nominal diameter) <br/>NB (nominal bore) <br/>OD (outside diameter)<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></p>
<p class="MsoPlainText"><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">5. </span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">外径与</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">DN</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">，</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">NB</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">的关系如下：</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US"> <br/>------DN(mm)--------NB(inch)-------OD(mm) <br/>15-------------- 1/2--------------21.3 <br/>20--------------3/4 --------------26.7 <br/>25-------------- 1 ----------------33.4 <br/>32-------------- 1 1/4 -----------42.2 <br/>40-------------- 1 1/2 -----------48.3 <br/>50-------------- 2 -----------60.3 <br/>65-------------- 2 1/2 -----------73.0 <br/>80-------------- 3 -----------88.9 <br/>100-------------- 4 ------------114.3 <br/>125-------------- 5 ------------139.8 <br/>150-------------- 6 ------------168.3 <br/>200--------------- 8------------219.1 <br/></span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">上面数据依</span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US">ASTM A53</span><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??">仅共参考。规范不同，外徑会有些许差异，请注意。</span></p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span> </p>
<p class="MsoPlainText"><span style="COLOR: #333333; FONT-SIZE: 9pt; mso-ascii-font-family: ??; mso-hansi-font-family: ??"></span><span style="FONT-FAMILY: '??','serif'; COLOR: #333333; FONT-SIZE: 9pt" lang="EN-US"><o:p><font face="Verdana"><a href="http://www.bas-ch.com/Default.asp">http://www.bas-ch.com/Default.asp</a></font> 楼控家园</o:p></span></p>
作者:
电脑支支响
时间:
2011-4-22 22:05
楼控家园网站不错，就是服务器太差了，打网页太慢~
作者:
电脑支支响
时间:
2011-4-23 22:39
<p>我没记错的话，</p>
<p>好像 1 inch=25.4 mm</p>
作者:
wxx
时间:
2011-4-26 15:44
<p>楼主说的没错。</p>
<p> </p>
欢迎光临 千家论坛_智能建筑与智能家居技术交流社区 (http://bbs.qianjia.com:8020/)
Powered by Discuz! X3.2