法兰.docx

按结构型式分，有整体法兰、活套法兰和螺纹法兰。常见的整体法兰有平焊法兰及对焊法兰。平焊法兰的刚性较差，适用于压力p4MPa的场合；对焊法兰又称高颈法兰，刚性较大，适用于压力温度较高的场合。、法兰密封面的型式有三种：平面型密封面，适用于压力不高、介质无毒的场合；凹凸密封面，适用于压力稍高的场合；榫槽密封面，适用于易燃、易爆、有毒介质及压力较高的场合。垫片是一种能产生塑性变形、并具有一定强度的材料制成的圆环。大多数垫片是从非金属板裁下来的，或由专业工厂按规定尺寸制作，其材料为石棉橡胶板、石棉板、聚乙烯板等；也有用薄金属板(白铁皮、不锈钢)将石棉等非金属材料包裹起来制成的金属包垫片；还有一种用薄钢带与石棉带一起绕制而成的缠绕式垫片。普通橡胶垫片适用于温度低于120的场合；石棉橡胶垫片适用于对水蒸气温度低于450，对油类温度低于350，压力低于5MPa的场合，对于一般的腐蚀性介质，最常用的是耐酸石棉板。在高压设备及管道中，采用铜、铝、10号钢、不锈钢制成的透镜型或其他形状的金属垫片。高压垫片与密封面的接触宽度非常窄(线接触)，密封面与垫片的加工光洁度较高。我国钢制管法兰国家标准体系GB1）公称压力：0.25Mpa42.0Mpaa、系列1：PN1.0,PN1.6,PN2.0,PN5.0,PN10.0,PN15.0,PN25.0,PN42（主系列）b、系列2：PN0.25,PN0.6,PN2.5,PN4.0其中PN0.25，PN0.6，PN1.0，PN1.6，PN2.5，PN4.0共6个等级的法兰尺寸系属于以德国法兰为代表的欧洲法兰体系，其余为美国法兰为代表的美洲法兰体系。国标系列NationalStandardSeries标准号通径范围压力等级GB/T9112-9113.4-2000DN10-DN2000PN0.250.61.02.54.06.310.016.0MpaJB/T74-86.2-94DN10-DN1600PN0.250.61.02.54.06.310.016.020.0MpaHG20592-20626-97DN10-DN2000PN0.250.61.02.02.54.05.06.310.011.015.016.025.026.042.0MpaSH3406-96DN10-DN1500PN1.02.05.06.810.015.025.042.0MpaGB/T17241.1-17241.7DN10-DN4000PN0.250.61.01.62.02.54.05.0MpaGB/T15530.1-15530.8DN10-DN1800PN0.61.01.62.02.54.05.0Mpa凸面平焊钢制管法兰PN1.0MPa(10bar)MM公称通径DN管子外径A连接尺寸密封尺寸法兰厚度C法兰内径B法兰理论重量kg法兰管径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df数量n螺纹Th.系列1/系列210149060144M1240212150.4615189565144M1245212190.51202510575144M1255214260.75253211585144M1265214330.893238140/135100184M1678216391.404045150/145110184M1685318461.715057165/160125184M16100318592.096573185/180145184M16120320752.848089200/195160184M16135320913.24100108220/215180188M161553221104.01125133250/245210188M161853241355.40150159285/280240238M202103241616.67175194310270238M202403241967.44200219340/335295238M202653242228.24225245365325238M202953242489.30250273395/3903502312M2032032627610.70300325445/4404002312M2036842832812.90350377505/5004602316M2042842838016.9040042656551526/2516M24/M2248243043021.8045048061556526/2520M24/M2253243048424.4050053067062026/2520M24/M2258543253427.706006307807253020M2768553663439.407007208958403024M27800536715538008201015/10109503424M30905538817679009201115/111010503428M30100553891876参考100010201230/1220116036/3428M33/M301115538102090参考11001120134012703628M331222540125参考120012201455/1450138039/4132M3613255441223143参考凸面平焊钢制管法兰PN1.6MPa(16bar)MM公称通径DN管子外径A连接尺寸密封尺寸法兰厚度C法兰内径B法兰理论重量kg法兰管径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df数量n螺纹Th.系列1/系列210149060144M1240214150.5515189565144M1245214190.71202510575144M1255216260.87253211585144M1265218331.183238140/135100184M1678218391.604045150/145110184M1685320462.005057165/160125184M16100322592.616573185/180145184M16120324753.458089200/195160188M16135324913.71100108220/215180188M161553261104.80125133250/245210188M161853281356.47150159285/280240238M202103281617.92175194310270238M202403281968.81200219340/3352952312M2026533022210.102252453653252312M2029533024811.7025027340535526/2512M24/M2232033227615.7030032516041026/2512M24/M2237543232818.1035037752047026/2516M24/M2243543438023.304004265805253016M2748543843031.004504806405853020M2754544248440.20500530715/7056503420M3060844853455.7060063084077036/4120M33/M3671855063480.8070072091084036/4124M33/M36788550724106.28008201025/102095039/4124M36898552824130.59009201125/1120105039/4128M3699854492491参考100010201255117042/4828M39/M4211105461024127参考11001120137012804228M3912225501124160参考120012201485139048/5432M45/M4813255521224186参考凸面平焊钢制管法兰PN2.5MPa(25bar)MM公称通径DN管子外径A连接尺寸密封尺寸法兰厚度C法兰内径B法兰理论重量kg法兰管径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df数量n螺纹Th.系列1/系列210149060144M1240216150.6415189565144M1245216190.80202510575144M1255218260.99253211585144M1265218331.183238140/135100184M1678220391.964045150/145110184M1685322462.605057165/160125184M16100324592.716573185/180145188M16120324753.228089200/195160188M16135326914.06100108235/230190238M201603281106.0012513327022026/258M24/M221883301358.2615015930025026/258M24/M2221833016110.4017519433028026/2512M24/M2224833219611.9020021936031026/2512M24/M2227833222214.502252453953403012M2730233424817.002502734253703012M2733233427618.903003254854303016M2739043632826.80350377555/5504904016M3044844238034.35400426620/61055036/3416M33/M3050544443044.90450480670/66060036/3420M33/M3055544848451.9250053073066036/3420M33/M3661045253467.30600630845/8407704120M3671855663495.20700720960/95587542/4824M39/M42815560724116800