法兰规格尺寸表

1、常用法兰规格尺寸表(国标、美标、日标) GB9119，288GB9119，288in公称通径 10kg=1.0MPa公称通径 16kg=1.6MPa法兰外径螺栓孔距螺栓直径螺栓孔数法兰厚度法兰外径螺栓孔距螺栓直径螺栓孔数法兰厚度3/8DN10506014414DN109060144141/2DN159565144143/4DN201057514416DN2010575144161DN251158514416DN25115851441611/4DN3214010018418DN321401001841811/2DN4015011018418DN4015011018418

2、2DN5016512518420DN501651251842021/2DN6518514518420DN65185145184203DN8020016018820DN802001601882031/2DN10022018018822DN100220180188224DN12525021018822DN125250210188225DN15028524022824DN150285240228246DN20034029522824DN200340295228268DN250395350221226DN25040535526122910DN300445400221228DN3004604102612

3、3212DN350505460221630DN35052047026163514DN400565515261632DN40058052530163816DN450615565262035DN45064058530204218DN500670620262038DN50071565033204620DN600780725262042DN60084077036205224JIS标准JIS标准in公称通径10kg=1.0MPa公称通径16kg=1.6MPa法兰外径螺栓孔距螺栓直径螺栓孔数法兰厚度法兰外径螺栓孔距螺栓直径螺栓孔数法兰厚度3/8DN10DN101/2DN15DN153/4DN20DN201

4、DN25DN2511/4DN32DN3211/2DN4014010519416DN40140105194162DN5015512019416DN501551201981621/2DN6517514019418DN65175140198183DN8018515019818DN80200, 1602282031/2DN9019516019818DN90210170228204DN10021017519818DN100225185228225DN12525021023820DN125270225258226DN15028024023822DN1503052602512248DN20033029023

5、1222DN20035030525122610DN250400355251224DN25043038029122812DN300445400251624DN30048043029163014DN350490445251626DN35054048032163416DN400560510271628DN40060554035163818DN450DN45020DN500DN50024DN600DN600ANSI标准125型ANSI标准150型in公称通径10kg=1.0MPa公称通径16kg=1.6MPa法兰外径螺栓孔距螺栓直径螺栓孔数法兰厚度法兰外径螺栓孔距螺栓直径螺栓孔数法兰厚度3/8DN10

6、DN101/2DN15DN153/4DN20DN201DN25DN2511/4DN32DN3211/2DN4012798.516414.3DN4012798.516417.52DN50152120.519415.9DN50152121.519419.121/2DN65178139.519417.5DN65178139.519422.33DN80190152.519419.1DN80190152.519423.94DN100229190.519823.9DN100229190.519823.95DN125254216.522823.9DN125254216.522823.96DN15027924

7、1.522825.4DN150279241.522825.48DN200343298.522828.6DN200343298.522828.610DN250406362.5251230.2DN250406362.5251230.212DN300483432251231.8DN300483432251231.814DN350533476.5291235DN350533476.529123516DN400597539.5291636.6DN400597539.5291636.618DN450DN45020DN500DN50024DN600DN600法兰PL是板式平焊法兰板式平焊法兰(PL)：平焊法

8、兰适用于公称压力不超过2.5MPa的钢管道连接.平焊法兰的密封面可以制成光滑式，凹凸式和榫槽式三种.光滑式平焊法兰的应用量最大.多用于介质条件比较缓和的情况下，如低压非净化压缩空气、低压循环水。法兰分类：1、按化工(HG)行业标准分：整体法兰(IF)、螺纹法兰(Th)、板式平焊法兰(PL)、带颈对焊法兰(WN)、带颈平焊法兰(SO)、承插焊法兰(SW)、对焊环松套法兰(PJ/SE)、平焊环松套法兰(PJ/RJ)、衬里法兰盖(BL(S)、法兰盖(BL)。2、按石化(SH)行业标准分：螺纹法兰(PT)、对焊法兰(WN)、平焊法兰(SO)、承插焊法兰(SW)、松套法兰(LJ)、法兰盖(不表注)。 3、按机械(JB)行业标准分：整体法兰、对焊法兰、板式平焊法兰、对焊环板式松套法兰、平焊环