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{block name="title"}de50管是什么管-丫丫百科{/block}
{block name='description'}De50管是管材外径的标注方式，其外径为50mm。此外，标注管材的符号还有D，表示的是管材的内径，DN表示的是管材的公称直径。在这些符号中，DN是常出现的一种，并不是表示内径，也不是表示外径，而是管材内径与外径的平均值多少，常用的规格包括有DN25、DN40等。{/block}
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            <h1 class="tit" style="text-align: center;font-size: 28px;margin-top: 15px"><span>de50管是什么管</span></h1>
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                <span>时间：2023-04-08</span>
                <span>来源：互联网公开数据整理或转载</span>
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                <p>De50管是管材外径的标注方式，其外径为50mm。此外，标注管材的符号还有D，表示的是管材的内径，DN表示的是管材的公称直径。在这些符号中，DN是常出现的一种，并不是表示内径，也不是表示外径，而是管材内径与外径的平均值多少，常用的规格包括有DN25、DN40等。</p>            </div>
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