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09:49:00",3201,{"cn":957},{"content":958,"summary":953,"title":951},"\u003Ch4 style=\"font-family:sans-serif;font-size:16px;text-align:center;\">\n\t\u003Cstrong>什么是法兰\u003C\u002Fstrong>\n\u003C\u002Fh4>\n\u003Cp style=\"font-family:sans-serif;font-size:16px;\">\n\t\u003Cbr \u002F>\n\u003C\u002Fp>\n\u003Cp style=\"font-family:sans-serif;font-size:16px;text-align:justify;\">\n\t      法兰是一种盘状零件，在管道工程中最为常见，法兰都是成对使用的。在管道工程中，法兰主要用于管道的连接。在需要连接的管道，各种安装一片法兰盘，低压管道可以使用丝接法兰，4公斤以上压力的使用焊接法兰。两片法兰盘之间加上密封点，然后用螺栓紧固。不同压力的法兰有不同的厚度和使用不同的螺栓。水泵和阀门，在和管道连接时，这些 器材设备的局部，也制成相对应的法兰形状，也称为法兰连接。凡是在两个平面在周边使用螺栓连接同时封闭的连接零件，一般都称为“法兰”，如通风管道的连接，这一类零件可以称为“法兰类零件”。但是这种连接只是一个设备的局部，如法兰和水泵的连接，就不好把水泵叫“法兰类零件”。比较小型的如阀门等，可以叫“法兰类零件”。\n\u003C\u002Fp>\n\u003Cp style=\"font-family:sans-serif;font-size:16px;\">\n\t\u003Cbr \u002F>\n\u003C\u002Fp>\n\u003Cp style=\"font-family:sans-serif;font-size:16px;text-align:center;\">\n\t\u003Cimg src=\"website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002Fimage\u002F20230906\u002F20230906094832_9769.png\" alt=\"\" \u002F>\n\u003C\u002Fp>\n\u003Cp style=\"font-family:sans-serif;font-size:16px;\">\n\t\u003Cbr \u002F>\n\u003C\u002Fp>\n\u003Ch4 style=\"font-family:sans-serif;font-size:16px;text-align:center;\">\n\t\u003Cstrong>法兰的用处\u003C\u002Fstrong>\n\u003C\u002Fh4>\n\u003Cp style=\"font-family:sans-serif;font-size:16px;\">\n\t\u003Cbr \u002F>\n\u003C\u002Fp>\n\u003Cp style=\"font-family:sans-serif;font-size:16px;text-align:justify;\">\n\t      法兰是用来定位的。                                                               比如油缸有一种安装方式就叫做法兰安装，就是比如一长方体四周打四个对称的孔，中间有一个大孔和油缸的外径相同，把这个长方体套在油缸上它们之间可以焊接后其他方式固定在一起，油缸和其他东西连接是就是靠这个长方体的周围四个孔连接，这个长方体就可以称做法兰。\n\u003C\u002Fp>\n\u003Cp style=\"font-family:sans-serif;font-size:16px;\">\n\t\u003Cbr \u002F>\n\u003C\u002Fp>",{"id":960,"title":961,"picPath":962,"summary":963,"showTime":964,"crtDate":964,"orderNum":965,"readNum":966,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":967},10344,"阀门和法兰的压力等级","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202308\u002Fac49bbdcadd5423ab8d947825788a274.png","依据ASME B16.5， 钢法兰有7个压力等级：Class150 - 300 - 400 - 600 - 900 - 1500 - 2500","2023-08-09 08:26:00",25,6716,{"cn":968},{"content":969,"summary":963,"title":961},"\u003Cdiv class=\"__kindeditor_paste__\">\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t法兰的压力等级\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t依据ASME B16.5， 钢法兰有7个压力等级：Class150 - 300 - 400 - 600 - 900 - 1500 - 2500\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t法兰的压力等级很明确，Class300的法兰能承受比Class150更大的压力，因为Class300的法兰需要由更多的材料来制造，从而可以抵挡更大的压力。但是，法兰的受压能力受多种因素的影响。法兰的压力等级用磅来表示，一个压力等级有不同的表示方法。比如：150Lb 、 150Lbs、150# 和Class150 的意思是一样的。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t压力等级举例\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t温度不同，法兰的承压能力也不同。温度上升，法兰的承压能力随之下降。举例来说，Class150的法兰在常温下承压能力为270PSIG，在400℉的承压能力为180 PSIG，在600℉的承压能力为150 PSIG，在800℉的承压能力为75 PSIG。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t换句话说，当压力下降时，允许温度上升，反之亦然。由于法兰可由不同的材料制造，比如不锈钢、铸铁、球墨铸铁，碳钢等等，每一种材料都有不同的压力等级。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t下图是一个NPS12的法兰示例，大家可以看到，法兰内孔和突面的直径都是相同的。但是，法兰的外径、螺栓孔中心圆直径、螺栓孔直径随着压力等级的增大而变大。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t螺栓孔的数量和直径分别是：\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\tCL 150 - 12 x 25.4     CL 300 - 16 x 28.6     CL 400 - 16 x 34.9     CL 600 - 20 x 34.9     CL 900 - 20 x 38.1     CL 1500 - 16 x 54     CL 2500 - 12 x 73\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-indent:0em;text-align:center;\">\n\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t压力温度额定值-举例\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t压力-温度额定值是指材料和等级在额定温度（摄氏度）下的最高允许工作表压（压力单位为Bar）。对于中间温度，允许采用直线性插入法确定。但是法兰级别之间不允许插入。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t如果法兰接头的螺栓和垫片符合相关限定条件，而且法兰接头的找正和装配符合优良规程，则这样的法兰接头可适用于压力-温度的额定值。如将后者用于不符合这些限定条件的法兰接头，则由用户负责。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t相应于额定压力的额定温度是指法兰和法兰管件的承压容器的壳体温度。一般情况下，这个温度与储存流体的温度相同。不按储存流体温度来选用压力额定值的责任由用户自负。当温度在-29℃（-20℉）以下时，额定值应不大于-29℃（-20℉）时的额定值。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-indent:0em;text-align:center;\">\n\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t作为举例，以下是按照ASTM划分的两组材料和他们按照ASME B16.5的压力-温度额定值。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t2. 不得用于455℃以上。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t3. 不得用于370℃以上。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t4. 不得用于260℃以上。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t5.不得用于425℃以上。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-indent:0em;text-align:center;\">\n\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-indent:0em;text-align:center;\">\n\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t额定值\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t额定值一词描述了压力、温度和阀体的结构材料之间的直接关系。额定值表示根据流体的温度以及阀体和阀盖的结构材料 (包括这些部分的壁厚)，阀体可以承受多少压力。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t工作压力必须随着工作温度的升高而降低。同样地，如果工作压力提高，工作温度也必须降低。这意味着，当压力和温度按比例增加时，例如对于饱和蒸汽这样的流体，阀门材料的机械阻力会按比例减少。因此，正是通过压力和温度等级来定义阀门的压力等级。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t阀座和其他部件采用非金属材料 (例如，热塑性塑料和弹性体)的阀门，其额定值将远远低于ASME B 16.34中所列的碳钢、合金钢和不锈钢阀体和阀盖的数值。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t对于按照ASME B16.34制造的阀门，发现压力等级值为150、300、600、900、1500、2500和4500，温度在-29C至270C之间的150级，在300级及以上的，最高454C，以ASTM A碳钢216 Gr.WCB为例。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t等级和压力\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t为了确定压力和温度曲线，根据ISO15761第4.1.2段和AP1602第4.1.3段，800级阀门 (中间级)必须在600级和900级之间使用线性插值形式，即600级的1\u002F3(ASME B16.34) +900级的2\u002F3(ASME B16.34)。根据ASME B16.34标准，例如，600级阀门的最大工作压力，在温度为-29C至38C之间，为1480psig (102.1barg)，而900级的WCB铸碳钢的最大压力为2220psig (153 barg)。通过插值的方式，按照ASTMA105标准锻造的800级碳钢应采用493psig (600级的1\u002F3) +1480psig (900级的2\u002F3)，从而在温度为-29·C至38·C之间的最大工作压力为1973psig (磅\u002F平方英寸表压)。对于温度高于38°C和\u002F或合金钢和不锈钢等材料，应使用同样的方法\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t600级和900级的压力和温度值都必须符合ASMEB16.34标准中对该压力等级规定的温度，该温度与流动流体的温度相对应。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t对于使用不锈钢阀座的阀门，无论其类型或压力等级如何，其等级都受到阀体结构或垫圈材料的限制，而对于那些使用弹性体或热塑性塑料制成的阀座，其等级是由这些材料支持的压力和温度极限来确定的。那些带有金属阀座的阀门适用于各种压力、温度、腐蚀性和流体类型的工作条件，每一个阀门都必须根据其结构特点进行仔细分析。4500级只适用于由碳钢、合金和不锈钢建造的阀门，但有对焊连接。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t对于那些按照DIN标准建造的阀门，考虑到流体温度在-10°C到120°C之间，所给出的数值是：PN6、PN10、PN16、PN25、PN40、PN63、PN100、PN160、PN250、PN320和PN400。在这个标准中，压力值的单位是巴，温度的单位是℃。首字母PN代表 \"公称压力\"。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t最大工作压力\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t表1取自ASME B16.34（2020版），显示了ASTM A216 Gr. WCB（铸造碳钢）和ASTM A 105 Gr. II（锻造碳钢）等材料根据温度的最大工作压力值。所有阀门的尺寸特征，主要是那些连接为法兰的阀门，都是基于其压力等级的数值。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t安全阀和泄放阀\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t对于安全阀和\u002F或泄放阀，进口法兰的压力等级限制了其设定压力。如果阀门是常规的，出口法兰的压力等级限制了背压。对于波纹管平阀，除了喷嘴孔径面积外，波纹管的材料也限制了背压值，这是由API标准526确定的。在那些有弹性阀座(软)的阀门中，限制进口压力的是其材料(可能是一些热塑性塑料或弹性体)、喷嘴孔口的面积和其设定压力。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t为选择阀门的压力等级而考虑的压力必须限制在标准B16.34的表格中找到的数值的75%，并根据阀体和阀盖的结构材料以及温度来决定。要考虑的温度始终是工艺流体的工作温度。如果对于该压力等级以及压力和温度的工作条件来说，必须超过这个百分比，并且根据阀门的结构材料，用户必须指定上面的下一个等级。这个百分比也必须限制阀门的设定压力，以指定和确定尺寸。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t表1以300级为基础，适用于阀体和阀盖为WCB碳钢或ASTM A105Gr.ll锻造的碳钢的阀门。对于其他材料，请参考ASME B16.34。例如，在该表中，当温度为250C时，工作压力必须限制在31.4kgf\u002Fcm2 (250C时为该表中41.9kgf\u002Fcm2的75%)。例如，如果在这个相同的温度下，1作压力必须是36 kgf\u002Fcm2，我们必须为阀门指定一个600级的法兰。以此类推。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t流体的温度，如过热蒸汽，是提高阀门或法兰在特定应用中的压力等级值的主要原因。例如，对于两个压力相同的应用，一个使用饱和蒸汽，另一个使用过热蒸汽，使用饱和蒸汽的应用的压力等级将低于使用过热蒸汽的应用，因为在相同的工作压力下，过热蒸汽的温度会更高。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\u003C\u002Fdiv>",{"id":971,"title":972,"picPath":973,"summary":974,"showTime":975,"crtDate":975,"orderNum":316,"readNum":976,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":977},10343,"八种法兰密封垫，你都知道吗？使用场合与范围介绍","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202307\u002F883a37f6f78741299cd91515630f298e.png","天然橡胶适用于水、海水、空气、惰性气体、碱类、盐类水溶液等介质，但不耐矿物油和非极性溶剂，长期使用温度不超过90℃，低温性能优异，可在-60℃以上使用。","2023-07-12 08:51:00",3459,{"cn":978},{"content":979,"summary":974,"title":972},"\u003Cdiv class=\"__kindeditor_paste__\">\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t1 、工业橡胶\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t天然橡胶适用于水、海水、空气、惰性气体、碱类、盐类水溶液等介质，但不耐矿物油和非极性溶剂，长期使用温度不超过90℃，低温性能优异，可在-60℃以上使用。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t丁腈橡胶适用于石油类产品，如石油、润滑油、燃料油等，长期使用温度为120℃，如在热油中可耐150℃，低温为-10~-20℃。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t氯丁橡胶适用于海水、弱酸、弱碱、盐溶液，耐氧和臭氧老化性能优异，耐油性次于丁腈橡胶而优于其他通用橡胶，长期使用温度低于90℃，最高使用温度不超过130℃，低温为-30~-50℃。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t氟橡胶有多个品种，它们分别具有良好的耐酸、耐氧化性能以及耐油、耐溶剂性能。可以在几乎所有的酸类介质以及一些油和溶剂中使用，长期使用温度低于200℃。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t橡胶板材作为法兰垫片，多用于管道或经常拆卸的人孔、手孔，压力不超过1.568MPa。因在各类垫片中，橡胶垫片最软，贴合性能好，在较小的预紧力下就能发挥密封效果。正因如此，在承受内压时，因垫片偏厚或硬度偏低而容易被挤出。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t橡胶板材在苯、酮、醚等有机溶剂中使用，易出现溶胀、增重、变软、发粘现象，导致密封失效。一般溶胀度超过30%就不能使用。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t在低压(尤其是0.6MPa以下)、真空情况下，采用橡胶垫较为适宜。橡胶材料致密性好，透气率低。例如氟橡胶，最适宜作真空容器的密封垫片，真空度最高可达1.3×10-7Pa。橡胶垫在10-1~10-7Pa真空度范围使用时，需经烘焙和抽气处理。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t2 、石棉橡胶板\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t价格较其它垫片低，使用方便;最大问题是：垫片材料虽然加入了橡胶和一些填充剂，仍无法将那些串通的微小孔隙完全填满，存在微量渗透。故在污染性极强的介质中，即使压力、温度不高也不能使用。当用于一些高温油类介质时，通常在使用后期，由于橡胶和填充剂碳化，强度降低，材质变疏松，便在界面和垫片内部产生渗透，出现结焦和发烟现象。另外，石棉橡胶板在高温下易粘结在法兰密封面上，给更换垫片带来了许多麻烦。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t在受热状态下，垫片在各种介质中的使用压力取决于垫片材料的强度保持率。石棉纤维材料中存在着结晶水和吸附水。110℃时，纤维之间的吸附水已有2\u002F3析出，纤维的抗拉强度约降低10%;368℃时，吸附水全部析出，纤维的抗拉强度约降低20%;超过500℃，结晶水开始析出，强度则更低。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t介质对石棉橡胶板的强度影响也很大。例如，在航空润滑油和航空燃油中，400号耐油石棉橡胶板横向抗拉强度相差80%，这是由于航空燃油对板材中橡胶的溶胀比航空润滑油严重之故。考虑到上述因素，国产石棉橡胶板XB450的推荐安全使用范围：温度250℃~300℃，压力3~3.5MPa;400号耐油石棉橡胶板使用温度不宜超过350℃。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t石棉橡胶板含有氯离子和硫化物，吸水后容易与金属法兰形成腐蚀原电池，尤其是耐油石棉橡胶板中硫磺含量高出普通石棉橡胶板好几倍，故在非油性介质中不宜使用。垫片在油品和溶剂类介质中会发生溶胀现象，但在一定范围内，对密封性能基本没有什么影响。例如，400号耐油石棉橡胶板在常温航空燃油中作24小时浸泡试验，要求因吸油重量增加不得超过15%。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t国产石棉橡胶板与国外名牌产品相比尚有一定差距。某单位的统计数字表明，在超过350℃的油介质中，凡使用石棉橡胶板不漏的大多为进口产品。日本石油工业标准JPI-7S-71《石油工业用石棉橡胶板使用标准》，使用期限约为一年。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t3 、聚四氟乙烯\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t聚四氟乙烯在受压及高温下易冷流及蠕变，故一般用于低压、中温、强腐蚀以及不允许污染的介质，如强酸、强碱、卤素、药品等。安全使用温度在150℃，压力 1MPa以下。填充聚四氟乙烯虽然强度高些，但使用温度也不超过200℃，且耐腐蚀能力下降。聚四氟乙烯包垫最高使用压力一般不超过2MPa。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t由于温度升高，材料发生蠕变，致使密封压力明显下降。即使不升温，随着时间的延长，密封面的压紧应力也会下降，产生“应力松弛现象。该现象在各种垫片中都会产生，只是聚四氟乙烯垫的应力松弛现象较为严重，应予注意。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t聚四氟乙烯的摩擦系数较小(压紧应力大于4MPa，摩擦系数为0.035~0.04)，预紧时垫片易向外滑移，所以最好采用凹凸式法兰面。当采用平面法兰时，可将垫片外径接触螺栓，利用螺栓阻止垫片外滑。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t由于搪玻璃设备是在金属表面喷涂了一层瓷釉后烧结而成的，釉层很脆，加之喷涂不均匀和釉层流动，法兰表面平面度较差。采用金属复合型垫片易损坏釉层，所以推荐使用芯材由石棉板加橡胶的聚四氟乙烯包垫。这种包垫既容易与法兰面贴合又耐腐蚀，使用效果良好。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t有许多厂在温度、压力不高的强腐蚀介质中，采用石棉橡胶板外缠聚四氟乙烯生料带，用于经常拆卸的人孔、管道上。由于制作、使用方便，颇受欢迎。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t4  、石棉树脂板和浸渍石棉板垫片\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t多用于各种酸性介质的管道、泵、阀、进出口法兰，其使用温度在80℃、压力在0.6MPa以下。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t石棉编制垫片适用于压力0.1MPa以下，温度不超过800℃的低压、高温工况。并可根据设备的具体要求，编织成不通宽度、厚度、直径的垫片。或将石棉带剪下后直接敷在法兰表面。它用于大型硫酸、硝酸氧化炉以及一些未经加工的设备接口处，效果远远超过原来的石棉绳。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t5 、金属包石棉垫\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t由金属薄板包覆石棉板或石棉橡胶板，使其不与介质直接接触，避免了石棉纤维强度下降，客服了渗漏现象，从而扩大了石棉橡胶板的使用范围。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t一般金属包石棉垫使用温度为450℃(个别也有达600~700℃，如在常压~0.16MPa的烟道气中)，使用压力为4MPa，最高可达6MPa。如压力再增高，垫片易产生横流现象，芯材从搭接处挤出。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t由于金属包石棉垫需要较大的螺栓拧紧力，即使当使用压力低于2.45MPa，也不能采用pg25公斤级以下的法兰。否则，法兰、螺栓的刚度就显得不够，产生变形而导致密封失效。有人认为，若将芯材改为弹性较好的合成橡胶，其紧固力就会下降。其实不然，因为芯材改软后，紧固力被芯材吸收，不能提供金属板在法兰面上贴合所需的紧固力，包垫反容易被极坏。另外，在含氯离子较多的介质以及酸性介质中，不锈钢包垫及铁皮包垫的搭接处易产生缝隙腐蚀。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t温度高于450℃，芯材可使用陶瓷纤维或碳纤维。某钢铁厂采用金属包陶瓷纤维垫片用于1100℃的高温，使用二年尚未损坏。柔性石墨作芯材是最合适的。目前，国内已批量生产金属包柔性石墨垫。其使用效果优于金属包石棉垫。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t金属包垫能制成各种形状，大量用于各种热交换器、反应器的大盖、装卸孔、人孔法兰等。国内曾制作过直径为2m的铁包垫，使用情况良好。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t在金属包垫的表面贴覆一层柔性石墨薄板，这种垫片与表面未包覆的同类金属包垫相比，预紧比压较小，密封性能更佳。图2-9为两者压紧应力与泄漏量的关系曲线。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t目前国内尚无此产品，故有的单位将现有的柔性石墨皱纹带贴在金属包垫以及金属平垫、齿形垫甚至石棉橡胶垫表面，解决了许多泄漏难题。例如某厂的热交换器，压力为5.88MPa、温度450℃，介质为氢\u002F油气。曾用过金属平垫、齿形垫，均有泄漏。后在平垫上贴了柔性石墨皱纹带，解决了这一问题。应该指出，这种垫片形式是一种解决法兰垫片泄漏的简便措施，贴覆柔性石墨带的工作性质量直接影响设备能否正常运转。若在带材背面涂刷一层胶水，可提高贴覆质量。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t6 、金属缠绕垫 \n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t金属缠绕垫巧妙地利用金属的耐热性、回弹性和强度以及非金属材料的柔软性，所以密封性能较好，其中又以不锈钢带缠绕柔性石墨垫的性能为最佳。其预紧比压较石棉缠绕垫小，不存在石棉纤维毛细孔渗漏的缺点。图2-10为两者预紧比压与泄漏量的关系曲线。在油介质中，金属带材多使用0Cr13，而其它介质则推荐使用1Cr18Ni9Ti。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t不锈钢带柔性石墨缠绕垫在气体介质中，使用压力为14.7MPa(国内有高达19.6MPa)，在液体中可用至30MPa。温度-190~+600℃(在无氧、低压情况下可用至1000℃)。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t聚四氟乙烯的耐低温性能良好，它在低温下的屈服强度大大高于常温时的强度。所以聚四氟乙烯缠绕垫可用于低温介质，如液态烃等。同时，因加入金属带提高了导热性，聚四氟乙烯缠绕垫使用温度可达250℃，在酸性介质中可用至9MPa、200℃。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t缠绕垫用于压力和温度波动较大的换热器、反应器、管道、阀门、泵进出口法兰较为合适。对于中等以上压力、温度超过300℃者，应考虑使用带内环、外环或内外环。若使用凹凸面法兰，配带内环的缠绕垫效果更好些。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t在柔性石墨缠绕垫两面贴覆柔性石墨板也能取得好的密封效果。某大型化肥厂废热锅炉属高温高压关键设备，用带外环的柔性石墨缠绕垫，满负荷时不漏，减负荷时则漏。在垫片两面增加了0.5mm厚的柔性石墨板，剪成圆弧状，接头部分采用斜口搭接，使用情况良好。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t7 、金属平垫和金属波形垫\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t一般用于中、高压阀门、管道和直径较小的设备法兰上。使用压力则根据温度的不同，前者为1.568~31.36MPa，后者为1.568~3.92MPa。垫片材质根据介质和温度选取。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t8 、八角垫和椭圆垫\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;text-align:justify;text-indent:2em;\">\n\t\t用于梯形槽面法兰的八角垫和椭圆垫(炼油行业俗称“土钢圈”)密封性能均好。在沟槽的锥面上，八角垫为面接触而椭圆垫是线接触。因此，椭圆垫在低紧固力下贴合性好，但需进行二次紧固;而八角垫一般一次紧固后，不易出现泄漏。它们的不足之处为要求较大的螺栓拧紧力，当用于低压高温情况时，法兰等级须在 pg25公斤级以上。\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\t\u003Cp style=\"font-size:medium;\">\n\t\t\u003Cbr \u002F>\n\t\u003C\u002Fp>\n\u003C\u002Fdiv>",{"id":981,"title":982,"picPath":983,"summary":984,"showTime":985,"crtDate":986,"orderNum":434,"readNum":987,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":988},9343,"法兰盖的生产材料","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202211\u002F11bc733e4c734ae69d792545c413313b.jpg","法兰盖也称盲板法兰、盲板。是中间不带孔的法兰，供封住管道堵头用。作用与焊接封头及丝扣管帽是一样的，只不过盲板法兰和丝扣管帽可以随时卸下来，而焊接封头则不行。","2022-11-24 08:39:00","2022-11-24 08:25:00",3567,{"cn":989},{"content":990,"summary":984,"title":982},"\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">简介：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        法兰盖也称盲板法兰、盲板。是中间不带孔的法兰，供封住管道堵头用。作用与焊接封头及丝扣管帽是一样的，只不过盲板法兰和丝扣管帽可以随时卸下来，而焊接封头则不行。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">生产材料：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        碳钢（Carbon Steel）:ASTM A105,20#、Q235、16Mn、 ASTM A350 LF1, LF2 CL1\u002FCL2, LF3 CL1\u002FCL2、ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70；\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        不锈钢（Stainess Steel）: ASTM A182 F304、304L、 F316、316L、1Cr18Ni9Ti、0Cr18Ni9Ti、321、18-8；\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        合金钢（Alloy Steel）: ASTM A182 F1、 F5a、 F9、 F11、 F12、 F22、F91、A182F12、A182F11、16MnR、Cr5Mo、12Cr1MoV、15CrMo、12Cr2Mo1、A335P22、 St45.8\u002FⅢ；\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        生产标准：HG\u002FT20592-2009、HG\u002FT20615-2009、GB\u002FT9123.1-2000、GB\u002FT9123.2-2000、GB\u002FT9123.3-2000、GB\u002FT9123.4-2000。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">详细介绍：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        法兰盖（BL)密封面:平面(FF)、突面(RF)、凹凸面(MFM)、榫槽面(TG)、环连接面(RJ) 生产材料:碳钢、不锈钢、合金钢。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">规格: 1\u002F2″～80″（10-2000） 压力等级:0.6Mpa ～32Mpa、150Lb ～2500Lb、PN0.25-PN42.0 材质:20# 、304、304L、321、316、316L、310S等各种材质 常用标准: 国标：GB\u002FT9112-2000（GB9113?1-2000～GB9123?4-2000） 美标：ANSI B16.5 Class150、300、600、900、1500（WN、SO、BL、TH、LJ、SW） 日标：JIS 5K、10K、16K、20K（PL、SO、BL、WN、TH、SW） 德标：DIN2573、2572、2631、2576、2632、2633、2543、2634、2545（PL、SO、WN、BL、TH） 化工部标准：HG5010-52～HG5028-58、HGJ44-91～HGJ65-91、HG20592-97系列、HG20615-97系列机械部标准：JB81-59～JB86-59、JB\u002FT79-94～JB\u002FT86-94、JB\u002FT74-1994 压力容器标准：JB1157-82～JB1160-82、JB4700-2000～JB4707-2000 应用范围：锅炉压力容器、石油、化工、造船、制药、治金、机械、食品等行业。法兰连接是管道施工的重要连接方式。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">法兰连接就是把两个管道、管件或器材，先各自固定在一个法兰盘上，两个法兰盘之间，加上法兰垫，用螺栓紧固在一起，完成了连接。有的管件和器材已经自带法兰盘，也是属于法兰连接。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">法兰分螺纹连接（丝接）法兰和焊接法兰。低压小直径有丝接法兰，高压和低压大直径都是使用焊接法兰，不同压力的法兰盘的厚度和连接螺栓直径和数量是不同的。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">根据压力的不同等级，法兰垫也有不同材料，从低压石棉垫、橡胶垫、高压石棉垫到金属垫都有。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">法兰连接使用方便，能够承受较大的压力。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">在工业管道中，法兰连接的使用十分广泛。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cbr \u002F>\n\u003C\u002Fp>",{"id":992,"title":993,"picPath":994,"summary":995,"showTime":985,"crtDate":996,"orderNum":291,"readNum":997,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":998},9342,"承插焊法兰的概述","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202211\u002F2d42dd5c315744129604f51f0a125b5e.png","承插焊法兰是指管子端部插入法兰环阶梯内，在管端及外侧焊接的法兰。","2022-10-24 09:21:00",3148,{"cn":999},{"content":1000,"summary":995,"title":993},"\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">简介：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">承插焊法兰是指管子端部插入法兰环阶梯内，在管端及外侧焊接的法兰。有带颈和不带颈两种。带颈管法兰的刚性好，焊接变形小，密封性较好，可用于压力为1.0~10.0MPa的场合。容器用乙型法兰也属承插焊法兰，用于密封要求较高的场合。设计时，承插焊法兰可按整体式法兰校核。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">密封面形式：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">突面（RF）、凹凸面（MFM）、榫槽面（TG）、环连接面（RJ）。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">材质：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">碳钢（Carbon Steel）：ASTM A105、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">2\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">0#\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">Q\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">235\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">16M\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">n、 ASTM A350 LF1, LF2；\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">CL1\u002FCL2,LF3 CL1\u002FCL2、ASTM A694 F42, F46,F48, F50, F52, F56, F60, F65, F70；\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">不锈钢（Stainess Steel）： ASTM A182 F304、304L、 F316、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">3\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">16L\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">1Cr\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">18Ni9Ti、0Cr18Ni\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">9Ti\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">、321、18-8；\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cbr \u002F>\n\u003C\u002Fp>\n\u003Cdiv class=\"para\">\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">合金钢（Alloy Steel）： ASTM A182 F1、 F5a、 F9、 F11、 F12、 F22、 F91、A182F12、A182F11、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">16M\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">nR\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">Cr5M\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">o\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">12Cr1\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">MoV\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">15Cr\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">Mo\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">、12Cr2Mo1、A335P22、St45.8\u002FⅢ；\u003C\u002Fspan>\n\u003C\u002Fdiv>\n\u003Cstrong>\u003Cspan style=\"font-size:16px;\">制造标准：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003Cp>\n\t\u003Cbr \u002F>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">ANSI B16.5、HG20619-1997、GB\u002FT9117.1-2000—GB\u002FT9117.4-200、HG20597-1997。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">连接方式：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">法\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">兰螺母\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">，螺栓连接。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">生产工艺：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">专业整体锻打，\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">锻\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">压\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">制造等。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cstrong>\u003Cspan style=\"font-size:16px;\">加工方式：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">高精度数控车床\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">车\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">削\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">，普通车床精车，\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">氩\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">弧焊\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">等加工。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">应用范围：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cbr \u002F>\n\u003C\u002Fp>\n\u003Cdiv class=\"para\">\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">锅炉压力\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">容器\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">、石油、化工、造船、制药、冶金、机械、\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">冲\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">压弯头\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">食品等行业；\u003C\u002Fspan>\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\">\n\t\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">    \u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">承插焊法兰：常用于PN≤10.0MPa，DN≤40的管道中。\u003C\u002Fspan>\n\u003C\u002Fdiv>\n\u003Cp>\n\t\u003Cbr \u002F>\n\u003C\u002Fp>",{"id":1002,"title":1003,"picPath":1004,"summary":1005,"showTime":1006,"crtDate":1006,"orderNum":191,"readNum":1007,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":1008},9341,"板式平焊法兰的标准","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202210\u002F7f1e98e1e2b34ddc89ee0c13391e7763.png","板式平焊法兰（化工标准HG20592、国家标准GB\u002FT9119、机械JB\u002FT81）：取材方便，制造简单，成本低，使用广泛；但刚性较差，因此不得用于有供需、易燃、易爆和较高真空度要求的化工工艺配管系统和高度、极度危害的场合。密封面型式有平面和突面。","2022-10-10 08:55:00",3757,{"cn":1009},{"content":1010,"summary":1005,"title":1003},"\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">简介：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        板式\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">平焊\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">法兰\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">（化工标准HG20592、国家标准GB\u002FT9119、机械JB\u002FT81）：取材方便，制造简单，成本低，使用广泛；但刚性较差，因此不得用于有供需、易燃、易爆和较高真空度要求的化工工艺配管系统和高度、极度危害的场合。密封面型式有平面和突面。\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">版式平焊法兰标准：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        国\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">标\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">法兰英文（\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">National standardflange）是指按\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">中华人民\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">共和国国家标准《GB\u002FT 9112~9124-2010钢制管法兰》的规定生产的法兰片。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        国标\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">法兰\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">标准由\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">中华人民共和国国\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">家质量监督检验检疫总局\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">和\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">中国国家标\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">准化管理委员会\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">于2011-01-10联合发布，从2011-10-01起实施的\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">推\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">荐性标准。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9112~9124-2010一共包括了以下13项标准：\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        代替了国标GB\u002FT9112-2000；GB\u002FT10745-1989标准\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9112-2010 钢制管法兰 类型与参数\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9113-2010 整体钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9114-2010 带颈螺纹钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9115-2010 对焊钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9116-2010 带颈平焊钢制管\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">法\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9117-2010 带颈承插焊钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9118-2010 对焊环带颈松套钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9119-2010 板式平焊钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9120-2010 对焊环板式松套钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9121-2010 平焊环板式松套钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9122-2010 翻边环板式松套钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9123-2010 钢制管法兰盖\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        GB\u002FT 9124-2010 钢制管法兰\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cstrong>\u003Cspan style=\"font-size:16px;\">技术条件：\u003C\u002Fspan>\u003C\u002Fstrong>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        本标准规定的压力标记分为PN标记和Class标记。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        PN标记有12个压力等级\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        分别为：PN2.5；PN6；PN10；PN16；PN25；PN40；PN63；PN100；PN160；PN250；PN320；PN400\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        Class标记有6个压力等级\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        分别为：Class 150；Class 300；Class 600；Class 900；Class 1500；Class 2500\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        国标\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">法兰\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">的另一层意思为：按照国家标准要求的尺寸、公差范围等生产的法兰盘，区别于不按标准尺寸生产的法兰片也称二标法兰(有人叫非标法兰是不正确的)，通常一些无良商家会减少法兰盘厚度、外径两项尺寸来达到节省材料的目的，还有用废旧钢材或边角料钢材加工法兰，通常这种钢材是化学成分和力学性能不达标的废料，更有甚者用黑钢厂私炼钢生产法兰，这种私炼钢使用的炼钢技术陈旧无法保证力学性能和焊接性能，使用时有可能无法和钢管焊接，或者钢材本身有裂缝、气孔等焊接上去后也会漏水。所以购买法兰盘时尽量选用国标法兰。如果资金有限选择二标法兰的情况下一定要仔细观察并测量法兰尺寸以免上当。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\n\u003C\u002Fp>",{"id":1012,"title":1013,"picPath":1014,"summary":1015,"showTime":1016,"crtDate":1016,"orderNum":185,"readNum":1017,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":1018},9340,"松套法兰的简介与适用范围","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202209\u002F264e8660c0824e2a887a866152c349b4.jpg","活套法兰是指松套于容器或管道突缘的一种法兰。法兰是轴与轴之间相互连接的零件，用于管端之间的连接；也有用在设备进出口上的法兰，用于两个设备之间的连接。","2022-09-22 13:10:00",2396,{"cn":1019},{"content":1020,"summary":1015,"title":1013},"\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>简介：\u003C\u002Fstrong>\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        活套法兰是指松套于容器或管道突缘的一种法兰。法兰是轴与轴之间相互连接的零件，用于管端之间的连接；也有用在设备进出口上的法兰，用于两个设备之间的连接。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        活套法兰属松式法兰。突缘可采用翻边、直接车出或另外焊接圆环等方式制成。优点是法兰变形时对容器或管道不产生附加力矩，制造方便，可采用与容器或管道不同的材料制造，便于节省贵重金属。缺点是法兰厚度较大。适用于容器或管道内衬有脆性材料且压力不高的场合。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cimg src=\"website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002Fimage\u002F20220922\u002F20220922130946_1302.jpg\" alt=\"\" \u002F>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>适用范围：\u003C\u002Fstrong>\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        广泛用于化工、建筑、给水、排水、石油、轻重工业、冷冻、卫生、水暖、消防、电力、航天、造船等基础工程。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cbr \u002F>\n\u003C\u002Fp>",{"id":1022,"title":1023,"picPath":1024,"summary":1025,"showTime":1026,"crtDate":1026,"orderNum":1027,"readNum":1028,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":1029},8340,"带颈平焊法兰的简介和优缺点","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202209\u002Fbc108ce4d1a54ed7872ee6238e5f4bc4.jpg","带颈平焊法兰全称带颈平焊钢制管法兰，是将钢管、管件等伸入法兰内通过角焊缝与设备或管道连接的法兰。","2022-09-07 15:25:00",19,2612,{"cn":1030},{"content":1031,"summary":1025,"title":1023},"\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>设备介绍：\u003C\u002Fstrong>\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">功能\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        带颈平焊法兰同板式平焊法兰一样也是将钢管、管件等伸入法兰内通过角焊缝与设备或管道连接的法兰。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">密封形式\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        带颈平焊法兰的密封面形式有：\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">                突面(RF)、凹面(FM)，凸面(M)、榫面(T)，槽面(G)，全平面(FF)。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        带颈平焊法兰的通径范围：DN10~DN600。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">适用范围\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">        PN系列 PN2.5~PN40; Class系列Class150~Class1500\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">法兰材料：碳素钢、珞钼钢、304、316、304L、316L、321、347、CF8C。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>优缺点：\u003C\u002Fstrong>\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">优点：带颈平焊法兰也属于平焊法兰，因为有个短颈，从而提高了法兰的强度改善了法兰的承载力度。所以可以用于更高压力的管道上。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">缺点：较板式平焊法兰而言造价更高，由于其形状的特点在运输途中更容易磕碰。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cbr \u002F>\n\u003C\u002Fp>",{"id":1033,"title":1034,"picPath":1035,"summary":1036,"showTime":1037,"crtDate":1037,"orderNum":304,"readNum":1038,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":1039},7340,"螺纹法兰的简介和原理","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202208\u002F1e3ac0f1124f4acf80f44581b20a052c.png","螺纹法兰是指采用螺纹与管道连接的一种法兰。设计时，可按松式法兰处理。优点是不需要焊接，法兰变形时对筒体或管道产生的附加力矩很小。缺点是法兰厚度大，造价较高。适用于高压管道的连接。","2022-08-25 08:12:00",2096,{"cn":1040},{"content":1041,"summary":1036,"title":1034},"\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>简介：\u003C\u002Fstrong>\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">       螺纹法兰是指采用螺纹与管道连接的一种法兰。设计时，可按松式法兰处理。优点是不需要焊接，法兰变形时对筒体或管道产生的附加力矩很小。缺点是法兰厚度大，造价较高。适用于高压管道的连接。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cimg src=\"website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002Fimage\u002F20220825\u002F20220825081126_0323.png\" alt=\"\" \u002F>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>实现原理：\u003C\u002Fstrong>\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">       螺纹法兰是将法兰的内孔加工成管螺纹，并和带螺纹的管子配套实现连接，是一种非焊接法兰。它和平焊法兰或对焊法兰相比，螺纹法兰具有安装、维修方便的特点，可在一些现场不允许焊接的管线上使用。合金钢法兰有足够的强度，但不易焊接，或焊接性能不好，亦可选择螺纹法兰。但在管道温度变化急剧或温度高于260℃低于-45℃的条件下，建议不使用螺纹法兰，以免发生泄漏。\u003C\u002Fspan>\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\n\u003C\u002Fp>",{"id":1043,"title":1044,"picPath":1045,"summary":1046,"showTime":1047,"crtDate":1047,"orderNum":1048,"readNum":1049,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":1050},7339,"法兰基本介绍","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202208\u002Fe9c3a550167641b6843b4c9bfd698008.jpg","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)中必备的构件。此外，其它专业如工业炉、热工、给排水、采暖通风、自控等，也经常使用法兰接头。","2022-08-12 08:24:00",17,2393,{"cn":1051},{"content":1052,"summary":1046,"title":1044},"\u003Cp>\n\t\u003Cspan style=\"font-size:16px;\">管法兰及其垫片、紧固件统称为法兰接头。\u003C\u002Fspan>\n\u003C\u002Fp>\n\u003Cp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>1、应用：\u003C\u002Fstrong>\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">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)中必备的构件。此外，其它专业如工业炉、热工、给排水、采暖通风、自控等，也经常使用法兰接头。\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>2、材质：\u003C\u002Fstrong>\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">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。\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>3、分类：\u003C\u002Fstrong>\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">平焊法兰、带颈法兰、对焊法兰、环连接法兰、承插法兰、及盲板等。\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>4、执行标准：\u003C\u002Fstrong>\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">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）。\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">\u003Cstrong>5、国际管法兰标准体系：\u003C\u002Fstrong>\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cp>\n\t\t\u003Cspan style=\"font-size:16px;\">国际上管法兰标准主要有两个体系。\u003C\u002Fspan>\n\t\u003C\u002Fp>\n\t\u003Cul>\n\t\t\u003Cli>\n\t\t\t\u003Cspan style=\"font-size:16px;\">以德国DIN(包括原苏联)为代表的欧洲管法兰体系\u003C\u002Fspan>\n\t\t\u003C\u002Fli>\n\t\t\u003Cli>\n\t\t\t\u003Cspan style=\"font-size:16px;\">以美国ANSI管法兰为代表的美洲管法兰体系。\u003C\u002Fspan>\n\t\t\u003C\u002Fli>\n\t\u003C\u002Ful>\n\u003Cspan style=\"font-size:16px;\">\u003C\u002Fspan>\n\u003C\u002Fp>",{"id":1054,"title":1055,"picPath":1056,"summary":1057,"showTime":1058,"crtDate":1058,"orderNum":339,"readNum":1059,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":1060},7338,"法兰连接工艺流程","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202207\u002F862410a2220d47faa00b7ae63bab6b5c.png","法兰连接工艺流程如下： 第一，法兰与管道的连接要符合以下要求： 1、管道与法兰的中心要在同一水平线上。 2、管道中心与法兰的密封面成90度垂直形状。 3、管道上法兰盘螺栓的位置应该对应一致。 第二，垫法兰垫片，要求如下： 1、在同一根管道内，压力相同的法兰选择的垫片应该要一样，这样才便于以后互相交换。 2、对于采用橡胶板的管道，垫片最好也选择橡胶的，例如水管线。 3、垫片的选择原则是：尽量靠近小宽度选择，这是在确定垫片不会被压坏的前提应该遵循的原则。 第三，连接法兰 1、检查法兰、螺栓和垫片的规格是否符合要求。 2、密封面要保持光滑整洁，不能有毛刺。 3、螺栓的螺纹要完整，不能有缺损，嵌合要自然。 4、垫片质地要柔韧，不易老化，表面没有破损，褶皱、划痕等缺陷。 5、装配法兰前，要把法兰清洗干净，去除油污、灰尘、锈迹等杂物，密封线剔除干净。 第四，装配法兰 1、法兰密封面与管道中心垂直。 2、相同规格的螺栓，安装方向也相同。 3、安装在支管上的法兰安装位置应该距离立管的外壁面在100毫米以上，距离建筑物的墙面距离应该在200毫米及以上。 4、不要把法兰直接埋在地下，容易被腐蚀，如果必须埋在地下，就要做好防腐处理。","2022-07-30 15:50:00",3465,{"cn":1061},{"content":1062,"summary":1063,"title":1055},"\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t法兰连接工艺流程如下：\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t第一，法兰与管道的连接要符合以下要求：\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t1、管道与法兰的中心要在同一水平线上。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t2、管道中心与法兰的密封面成90度垂直形状。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t3、管道上法兰盘螺栓的位置应该对应一致。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t第二，垫法兰垫片，要求如下：\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t1、在同一根管道内，压力相同的法兰选择的垫片应该要一样，这样才便于以后互相交换。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t2、对于采用橡胶板的管道，垫片最好也选择橡胶的，例如水管线。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t3、垫片的选择原则是：尽量靠近小宽度选择，这是在确定垫片不会被压坏的前提应该遵循的原则。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t第三，连接法兰\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t1、检查法兰、螺栓和垫片的规格是否符合要求。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t2、密封面要保持光滑整洁，不能有毛刺。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t3、螺栓的螺纹要完整，不能有缺损，嵌合要自然。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t4、垫片质地要柔韧，不易老化，表面没有破损，褶皱、划痕等缺陷。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t5、装配法兰前，要把法兰清洗干净，去除油污、灰尘、锈迹等杂物，密封线剔除干净。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t第四，装配法兰\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t1、法兰密封面与管道中心垂直。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t2、相同规格的螺栓，安装方向也相同。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t3、安装在支管上的法兰安装位置应该距离立管的外壁面在100毫米以上，距离建筑物的墙面距离应该在200毫米及以上。\n\u003C\u002Fdiv>\n\u003Cdiv class=\"para\" style=\"font-size:14px;color:#333333;font-family:"background-color:#FFFFFF;\">\n\t4、不要把法兰直接埋在地下，容易被腐蚀，如果必须埋在地下，就要做好防腐处理。\n\u003C\u002Fdiv>","法兰连接工艺流程如下：\n第一，法兰与管道的连接要符合以下要求：\n1、管道与法兰的中心要在同一水平线上。\n2、管道中心与法兰的密封面成90度垂直形状。\n3、管道上法兰盘螺栓的位置应该对应一致。\n第二，垫法兰垫片，要求如下：\n1、在同一根管道内，压力相同的法兰选择的垫片应该要一样，这样才便于以后互相交换。\n2、对于采用橡胶板的管道，垫片最好也选择橡胶的，例如水管线。\n3、垫片的选择原则是：尽量靠近小宽度选择，这是在确定垫片不会被压坏的前提应该遵循的原则。\n第三，连接法兰\n1、检查法兰、螺栓和垫片的规格是否符合要求。\n2、密封面要保持光滑整洁，不能有毛刺。\n3、螺栓的螺纹要完整，不能有缺损，嵌合要自然。\n4、垫片质地要柔韧，不易老化，表面没有破损，褶皱、划痕等缺陷。\n5、装配法兰前，要把法兰清洗干净，去除油污、灰尘、锈迹等杂物，密封线剔除干净。\n第四，装配法兰\n1、法兰密封面与管道中心垂直。\n2、相同规格的螺栓，安装方向也相同。\n3、安装在支管上的法兰安装位置应该距离立管的外壁面在100毫米以上，距离建筑物的墙面距离应该在200毫米及以上。\n4、不要把法兰直接埋在地下，容易被腐蚀，如果必须埋在地下，就要做好防腐处理。",{"id":1065,"title":1066,"picPath":1067,"summary":1068,"showTime":1069,"crtDate":1069,"orderNum":333,"readNum":1070,"indexNewsFlag":136,"topFlag":136,"recommendFlag":136,"categoryId":915,"subCategoryId":5,"className":916,"translations":1071},7337,"为什么法兰和阀门的生产需要热处理呢？","website-chuxin\u002Fimage\u002Fweb\u002Fcncxfl\u002Fupload\u002F840\u002F202207\u002F5a5d16df25f84500ba9c6b69a090453d.png","普通的法兰和阀门一般是不需要热处理的。但有时侯,当它们有强度、硬度、防锈性能等要求的时候，才需要热处理。","2022-07-18 08:20:00",1837,{"cn":1072},{"content":1073,"summary":1068,"title":1066},"\u003Cp>\n\t\u003Cspan style=\"color:#333333;font-family:"font-size:16px;background-color:#FFFFFF;\">　　普通的法兰和阀门一般是不需要热处理的。但有时侯,当它们有强度、硬度、防锈性能等要求的时候，才需要热处理。\u003C\u002Fspan>\u003Cbr \u002F>\n\u003Cspan style=\"color:#333333;font-family:"font-size:16px;background-color:#FFFFFF;\">　　热处理是指材料在固态下，通过加热、保温和冷却的手段，以获得预期组织和性能的一种金属热加工工艺。\u003C\u002Fspan>\u003Cbr \u002F>\n\u003Cspan style=\"color:#333333;font-family:"font-size:16px;background-color:#FFFFFF;\">　　阀门是流体输送系统中的控制部件，具有截止、调节、导流、防止逆流、稳压、分流或溢流泄压等功能。\u003C\u002Fspan>\u003Cbr \u002F>\n\u003Cspan style=\"color:#333333;font-family:"font-size:16px;background-color:#FFFFFF;\">　　用于流体控制系统的阀门，从最简单的截止阀到极为复杂的自控系统中所用的各种阀门，其品种和规格相当繁多。阀门可用于控制空气、水、蒸汽、各种腐蚀性介质、泥浆、油品、液态金属和放射性介质等各种类型流体的流动。阀门根据材质还分为铸铁阀门，铸钢阀门，不锈钢阀门（201、304、316等），铬钼钢阀门，铬钼钒钢阀门，双相钢阀门，塑料阀门，非标订制等阀门材质。\u003C\u002Fspan>\n\u003C\u002Fp>",{"requestId":1075,"contractVersion":8},"262e4035-e5be-41f7-bbe9-f2c1e4dcf4ff"]