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1、凸面整体铸钢管法兰1主题内容与知县范围本标准规定了公称压力PN为1.6，2.5,4.0MPA的凸面整体铸钢管法兰的型式和尺寸。本标准适用于公称压力PN1.64.0MPA的凸面整体铸钢管法兰。2引用标准JB/T74 管路法兰 技术条件3法兰的型式和尺寸应符合图1（略）及表1表3的规定。4法兰的技术要求按JB/T74的规定。5法兰的公称压力和不同温度下的最大允许工作压力按JB/T74附录B的规定。公称通径DN 连接尺寸密封面尺寸法兰厚度C法兰颈法兰外径D系列1/系列2螺栓孔中心圆直径K螺栓孔直径L系列1/系列2螺栓、螺柱dfNmaxSmaxR数量螺纹TH系列1/系列2152025324050658
2、0100125150(175)200(225)250300350400450500600700800900100012001400160095105115140/135150/145165/160185/180200/195220/215250/245285/280310340/335365405460520580640715/7058409101025/10201125/1120125514851685193065758510011012514516018021024027029532535541047052558565077084095010501170139015901820141414
3、181818181818182323232326/2526/2526/2530303436/4136/41414142/4848/5448/545844444448888812121212161620202024242828323640M12M12M12M16M16M16M16M16M16M16M20M20M20M20M24/M22M24/M22M24/M22M27M27M30M33/M36M33/M36M36M36M39/M42M45/M48M45/M48M52455565788510012013515518521024026529532037543548554560871878889899
4、811101325152517502222333333333334444455555555141414161616182020222426262630303436404448505254565860683944495664749511013016118621524026929834840245651056467277688098410841288149217041212121212121515151818202022242426283032363840424244465244444555566666888101010101012121212151518表2 PN2.5MPa凸面整体铸钢管法兰尺
5、寸 mm公称通径DN 连接尺寸密封面尺寸法兰厚度C法兰颈法兰外径D系列1/系列2螺栓孔中心圆直径K螺栓孔直径L系列1/系列2螺栓、螺柱dfNmaxSmaxR数量螺纹TH系列1/系列21520253240506580100125150(175)200(225)25030035040045050060070080090010001200140095105115140/135150/145165/160185/180200/195230270300330360395425485555/550620/610670/660730845/940960/9551085/10701185/11801320/1
6、3051520/15251755/1750657585100110125145160190220250280310340370430490550600660770875990109012101420164014141418181818182326/2526/2526/2526/253030303436/3436/3436/344142/484848/545858654444448888812121212161616202020242428283236M12M12M12M16M16M16M16M16M20M24/M22M24/M22M24/M22M24/M22M27M27M27M30M33/M3
7、0M33/M30M33/M36M36M39/M42M45/M42M45/M48M52M52M56455565788510012013516018821824827830233239044850555561071881593010251140135015602222333333333334444455555551616161818202222242830323436364044485052566064666872783944496270801011161361691982232522813063604184725225806847928961000110413081516121212151515
8、1818182224242628283034363840424648505254584555556668888810101010121212121515181818表3 PN4.0MPA凸面整体铸钢管法兰尺寸 mm公称压力DN 连接尺寸密封面尺寸法兰厚度C法兰颈法兰外径D系列1/系列2螺栓孔中心圆直径K螺栓孔直径L系列1/系列2螺栓、螺柱dfNmaxSmaxR数量螺纹TH系列1/系列21520253240506580100125150(175)200(225)25030035040045050060070080095105115140/135150/145165/160185/180200/1
9、95235/230270300350375415450/445515/510580/570660/655685/6807558909951140/1135657585100110125145160190220250295320355385450510585610670795900103014141418181818182326/2526/25303034343436/34414142/4848/5448/545844444488888121212121616162020202424M12M12M12M16M16M16M16M16M20M24/M22M24/M22M27M27M30M30M30M33/M30M36M36M39/M42M45/M48M45/M48M5245556578851001201351601882182582823153454084655355606127308359602222333333333334444445516161618182022222428303438404246525860626268763944496270801011161401691982312562853143684304885425926968049201212121515151818
