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1、中国JB标准法兰尺寸1.凸面整 体铸钢管法兰(JB/T79.1-94)图 1 凸面整体铸钢管法兰表28 PN1.6MPamm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双头螺柱dfNmaxSmaxR数量n螺纹Th.系列1/系列2159565144M1245214391242010575144M1255214441242511585144M12652144912432140/135100184M16782165612440150/145110184M16853166412450165/160125184M16100316
2、7412565185/180145184M161203189515580200/195160188M16135320110155100220/215180188M16155320130155125250/245210188M16185322161186150285/280240238M20210324186186(175)310270238M20240326215206200340/3352952312M20265326240206(225)3653252312M2029532626922625040535526/2512M24/M2232033029824830046041026/2512M
3、24/M22375430348248表29 PN2.5MPamm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n螺纹Th.系列1/系列2159565144M1245216391242010575144M1255216441252511585144M12652164912532140/135100184M16782186215540150/145110184M16853187015550165/160125184M161003208015565185/180145188M16120322
4、10118680200/195160188M16135322116186100230190238M2016032413618612527022026/258M24/M2218832816922815030025026/258M24/M22218330198248(175)33028026/2512M24/M2224833222324820036031026/2512M24/M22278334252268(225)3953403012M273023362812882504253703012M2733233630628103004854303016M273904403603010表 30 PN4.
5、0MPa 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n螺纹Th.系列1/系列2159565144M1245216391242010575144M1255216441252511585144M12652164912532140/135100184M16782186215540150/145110184M16853187015550165/160125184M161003208015565185/180145188M1612032210118680200/195160188M161
6、35322116186100235/230190238M2016032414020612527022026/258M24/M2218832816922815030025026/258M24/M22218330198248(175)3502953012M2725833423128102003753203012M272823382562810(225)4153553412M303153402853010250450/4453853412M303453423143210300515/5104503416M304084463683412注：表2830中系列1法兰连接尺寸与国标及德国法兰标准尺 寸互换；
7、系列2尺寸与原机标准法兰尺寸互换；新产品设计应优先采用系列1尺寸。2.凹凸面整体铸钢管法兰(JB/T79.2-94)图 2 凹凸面整体铸钢管法兰 mm表 31 PN4.0MPamm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双头螺柱dX系列1/系列2Y系列1/ 系列2ff1、f2NmaxSmaxR数量n螺纹Th.系列1/系列2159565144M124539402416391242010575144M125550512416441252511585144M1265575824164912532140/135100184
8、M1678656624186215540150/145110184M1685757634187015550165/160125184M16100878834208015565185/180145188M16120109110342210118680200/195160188M161351201213422116186100235/230190238M2016014915034.52414020612527022026/258M2418817517634.52816922815030025026/258M24/M2221820320434.530198248(175)3502953012M272
9、5823323434.53423128102003753203012M2728225926034.5382562810(225)4153553412M3031528628734.5402853010250450/4453853412M3034531231334.5423143210300515/5104503416M3040836336444.5463683412表 32 PN6.3MPamm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双头螺柱dX系列1/系列2Y系列1/ 系列2ff1、f2NmaxSmaxR数量n螺纹
10、Th.系列1/系列21510575144M1255394024184515420130/12590184M1668505124205216525140/135100184M1678575824226118532155/150110234M2082656624246818540170/165125234M2095757634248020550180/175135234M20105878834269020565205/200160238M20130109110342811123680215/210170238M20140120121343012824610025020026/258M24/M221
11、6814915034.532152266125295240308M2720217517634.536181288150345/340280348M3024020320434.538210308(175)3703103412M3027023323434.542239321020040534536/3412M33/M3030025926034.5442683410(225)43037036/3412M33/M3032528628734.546301381025047040036/4112M33/M3635231231334.548326381030053046036/4116M33/M364123
12、6336444.5543844212表 33 PN10.0MPamm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双头螺柱dX系列1/系列2Y系列1/ 系列2ff1、f2NmaxSmaxR数量n螺纹Th.系列1/系列21510575144M1255394024204515420130/12590184M1668505124225417425140/135100184M1678575824246118432155/150110234M2082656624246818440170/165125234M209575763426
13、802045019514526/254M24/M2211287883428942246522017026/258M24/M2213810911034321152558023018026/258M24/M221481201213434132265100265210308M2717214915034.538160305125315/310250348M3021017517634.542189326150355/3502903412M3025020320434.546222366(175)3803203412M3028023323434.54825138820043036036/4112M33/M3
14、631225926034.554284428(225)4704004112M3635228628734.556313448250505/5004304112M3638231231334.56034648830058550042/4816M39/M4244236336444.5704085410表 34 PN16.0MPamm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双头螺柱dX系列2Y系列2ff1、f2NmaxSmaxR数量n螺纹Th.系列1/系列21511075184M16523940242449174201309
15、0234M2062505124265819425140100234M2072575824286520432165115254M2285656624307622540175125274M2492757634328824550215165258M221328788343610226565245190308M27152109110344413133880260205308M271681201213446148348100300240348M3020014915034.548172368125355285418M3623817517634.56021344101503903184112M3627020
16、320434.5662464810(175)4603804812M4232523323434.57428756102004804004812M4234525926034.5783165810(225)5454505412M4839028628734.58234560102505804855412M4842531231334.58837864103006655705416M4851036336444.51004527610表 35 PN20.0MPamm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2螺栓孔中心圆直径K螺栓孔直径L系列2双头螺柱dX系列2Y系列2ff1、f2N
17、maxSmaxR数量n螺纹Th.系列1/系列21512082234M205527282526511852013090234M2062343525286020525150102254M2272414225306721532160115254M2285495025327823540170124274M2490555635349025550210160258M221286970354010829565260203308M271659697354813736880290230348M301901151163554160408100360292418M36245137138366620452812538
18、53184112M36270169170367623756101504403604812M4230518919036822706010(175)4753944812M42340213214368430163102005354405412M4838024424536923407010(225)5804835812M524182672683610037776102506705725816M52508318319361104489410注：表3135中系列1法兰连接尺寸与国标及德国法兰标准尺寸互换，系列2尺寸与原机标法兰尺寸互换；新产品设计优先采用系列1尺寸。3、榫槽面整体铸钢管法兰(JB/T79.
19、3-94)图 3 榫槽面整体铸钢管法兰表 36 PN4.0MPamm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双头螺柱dW系列1/系列2X系列1/系列2Y系列1/ 系列2Z系列1/系列2ff1、f2NmaxSmaxR数量n螺纹Th.系列1/系列2159565144M1245293940282416391242010575144M1255365051352416441252511585144M12654357584224164912532140/135100184M16785165665024186215540150/
20、145110184M16856175766034187015550165/160125184M161007387887234208015565185/180145188M161209510911094342210118680200/195160188M161351061201211053422116186100235/230190238M2016012914915012834.52414020612527022026/258M24/M2218815517517615434.52816922815030025026/258M24/M2221818320320418234.530198248(17
21、5)3502953012M2725821323323421234.53423128102003753203012M2728223925926023834.5382562810(225)4153553412M3031526628628726534.5402853010250450/4453853412M3034529231231329134.5423143210300515/5104503416M3040834336336434244.5463683412表 37 PN6.3MPamm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
22、/系列2双头螺柱dW系列1/系列2X系列1/系列2Y系列1/ 系列2Z系列1/系列2ff1、f2NmaxSmaxR数量n螺纹Th.系列1/系列21510575144M12552939402824184515420130/12590184M16683650513524205216525140/135100184M16784357584224226118532155/150110234M20825165665024246818540170/165125234M20956175766034248020550180/175135234M201057387887234269020565205/20016
23、0238M201309510911094342811123680215/210170238M20140106120121105343012824610025020026/258M24/M2216812914915012834.532152266125295240308M2720215517517615434.536181288150345/340280348M3024018320320418234.538210308(175)3703103412M3027021323323421234.542239321020040534536/3412M33/M3030023925926023834.544
24、2683410(225)43037036/3412M33/M3032526628628726534.546301381025047040036/4112M33/M3635229231231329134.548326381030053046036/4116M33/M3641234336336434244.5543844212表38 PN10.0MPamm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双头螺柱dW系列1/系列2X系列1/系列2Y系列1/ 系列2Z系列1/系列2ff1、f2NmaxSmaxR数量n螺纹Th.系列
25、1/系列21510575144M12552939402824204515420130/12590184M16683650513524225417425140/135100184M16784357584224246118432155/150110234M20825165665024246818440170/165125234M2095617576603426802045019514526/254M24/M22112738788723428942246522017026/258M24/M22138951091109434321152558023018026/258M24/M221481061201
26、211053434132265100265210308M2717212914915012834.538160305125315/310250348M3021015517517615434.542189326150355/3502903412M3025018320320418234.546222366(175)3803203412M3028021323323421234.54825138820043036036/4112M33/M3631223925926023834.554284428(225)4704004112M3635226628628726534.556313448250505/5004304112M3638229231231329134.56034648830058550042/4816M39/M4244234336336434244.570408541035065556048/5416M45/M484983954214223944576466581240071562048/5416M45/M4855844747347444645805206012注：表3638中系列1法兰连接尺寸与国标及德国法兰标准尺寸互换；系列2尺寸与原机标法兰尺寸互换；新产品设计应优先采用系列1尺寸。
