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            <p><br/></p><p><br/></p><section data-id="85538" style="overflow-y: auto; max-width: 100%; color: rgb(62, 62, 62); box-sizing: border-box; overflow-wrap: break-word; visibility: visible;"><section style="max-width: 100%; box-sizing: border-box; overflow-wrap: break-word; visibility: visible;"><p style="max-width: 100%; line-height: 30px; color: inherit; clear: none; min-height: 1em; white-space: pre-wrap; box-sizing: border-box; overflow-wrap: break-word; visibility: visible;"><span style="max-width: 100%; color: rgb(127, 127, 127); box-sizing: border-box; overflow-wrap: break-word; visibility: visible;"><span style="max-width: 100%; color: rgb(0, 0, 0); box-sizing: border-box; overflow-wrap: break-word; visibility: visible;">管<a href="/" title="法兰"><strong>法兰</strong></a>及其垫片、紧固件统称为<a href="/SignPage-detail-id-3562419.html" title="法兰"><strong>法兰</strong></a>接头。法兰接头是工程设计中使用极为普遍、涉及面非常广泛的一种零部件。它是配管设计、管件阀门必不可少的零件，而且也是设备、设备零部件(如人孔、视镜液面计等)中必有的构件。此外，其它场景如工业炉、热工、给排水、采暖通风、自控等，也经常使用法兰接头。</span></span></p></section></section><p><br/></p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word; visibility: visible;">　　<span style="max-width: 100%; color: rgb(0, 0, 0); box-sizing: border-box; overflow-wrap: break-word; visibility: visible;">材质：锻钢、WCB碳钢、不锈钢、316L、316、304L、304、321、铬钼钢、铬钼钒钢、钼二钛、衬胶、衬氟材质。</span></p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;"><span style="max-width: 100%; color: rgb(0, 0, 0); box-sizing: border-box; overflow-wrap: break-word; visibility: visible;">　　品种：<a href="/SignPage-detail-id-3562419.html" title="平焊"><strong>平焊</strong></a>法兰、带颈法兰、对焊法兰、环连接法兰、承插法兰、及盲板等。</span></p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;"><span style="max-width: 100%; color: rgb(0, 0, 0); box-sizing: border-box; overflow-wrap: break-word; visibility: visible;">　　执行<a href="/SignPage-detail-id-3562431.html" title="标准"><strong>标准</strong></a>有GB系列(国家标准)、JB系列(机械部)、HG系列(化工部)、ASME B16.5（美标）、BS4504（英标）、DIN（德标）、JIS（日标）。</span></p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;"><span style="max-width: 100%; color: rgb(0, 0, 0); box-sizing: border-box; overflow-wrap: break-word; visibility: visible;">　　管法兰标准体系：管法兰标准主要有两个体系，即以德国DIN(包括原苏联)为代表的欧洲管法兰体系和以美国ANSI管法兰为代表的美洲管法兰体系。除此之外，还有日本JIS管法兰，但在石油化工装置中一般仅用于公用工程，而且在世界上影响较小。</span></p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;"><span style="max-width: 100%; color: rgb(0, 0, 0); box-sizing: border-box; overflow-wrap: break-word; visibility: visible;"><br/></span></p><p><span style="color: rgb(62, 62, 62);">以德国及原苏联为代表的欧洲体系管法兰</span></p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;">　　美洲体系管法兰标准，以ANSI B16.5和ANSI B 16.47为代表。</p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;">　　英国和法国管法兰标准，两国各有两套管法兰标准，综上所述，通用的管法兰标准可概括为两个不同的，且不能互换的管法兰体系：一个以德国为代表的欧洲管法兰体系；另一个是以美国为代表的美洲管法兰体系。IOS7005-1是国家标准化组织于1992年颁布的一项标准，该标准实际上是把美国和德国两套系列的管法兰合并而成的管法兰标准。 两个体系的管法兰连接尺寸安全不同，无法互配。两个体系的管法兰以压力等级来区分比较合适，即欧洲体系为0.25、0.6、1.0、1.6、2.5、4.0、6.3、10.0、16.0、25.0、32.0、40.0MPa，美洲体系为1.0、2.0、5.0、11.0、15.0、26.0、42.0MPa。</p><p><br/></p><p><span style="color: rgb(62, 62, 62);"></span></p><p>1、我国管法兰标准现状：<span style="color: rgb(62, 62, 62);">我国化工、石化行业使用的管法兰常用的标准 1.英制管(通用的配管系列) GB 9112～9125、SH 3406</span><br/></p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;">2、公制管(国内常用的钢管外径尺寸系列) HGJ44～76、JB/T74～90 DIN的连接尺寸与JB标准是有所差别的，具体见下表：</p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;"><img src="http://alipic.files.mozhan.com/ueditor/image/20240126/1706246892245803.png" title="1706246892245803.png" alt="知识"/></p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;">（注：表中括号内的“全部”表示所有规格紧固件被第二行的紧固件所代替。“部分”表示有一部分该规格的紧固件有变化，但仍有一部分规格的紧固件未变化，是一致的。）</p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;">　　HG新标准与JB老标准法兰配合使用时，要注意以下几点：</p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;">　　1.有三个法兰的螺栓个数不一致，其中有两个规格(PN0.25/DN500、PN0.6/DN500)直接影响配合；PN1.0/DN80HG标准螺栓个数8，JB标准螺栓个数是4；</p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;">　　2.部分老标准法兰(JB系列2)的螺孔能扩孔1～2mm，另有一部分可在安装时加垫圈；</p><p style="overflow-y: auto; max-width: 100%; line-height: 30px; color: rgb(62, 62, 62); min-height: 1em; box-sizing: border-box; overflow-wrap: break-word;">　　3.PN16.0MPa的高压管法兰，新HG与JB标准连接尺寸完全不同。来源：泵阀之家</p><p class="altType" alt_type="知识大全-河北华创管道有限公司" style="display: none;"><br/></p>
    
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