GB/T4622.1-2022GB/T4622.1一2022《管法兰用缠绕式垫片第1部分：PN系列》国家标准第1号修改单一、表4增加DN25尺寸：表4榫槽面法兰用基本型缠绕式垫片尺寸(A型)单位为毫米公称压力公称尺寸PN16,PN25,PN40,PN63,PN100,PN160,PN250密封元件厚度(DN)密封元件内径密封元件外径TD:D,2542.557.52.5或3.2二、表5更改为：表5凹凸面法兰用带内环型缠绕式垫片尺寸(B型)单位为毫米公称压力公称尺寸PN16,PN25,PN40,PN63,PN100,PN160,PN250内环厚度密封元件厚度(DN)内环内径密封元件内径密封元件外径TTD:101823.534.5152228.539.5202735.550.5253442.557.5324350.565.52.03.2404960.575.5506172.587.5657794.5109.58090105.5120.5100116128.5149.5125143154.5175.5150170182.5203.52.0或3.03.2或4.5200222238.5259.5250276291.5312.5300328342.5363.5GB/T4622.1-2022表5凹凸面法兰用带内环型缠绕式垫片尺寸(B型)（续）单位为毫米公称压力公称尺寸PN16,PN25,PN40,PN63,PN100,PN160,PN250内环厚度密封元件厚度(DN)内环内径密封元件内径密封元件外径TDD:D350381394.5421.5400430446.5473.5450485496.5523.5500535548.5575.5600636648.5675.5700726750.5777.5800826855.5882.53.04.5900927960.5987.5100010271060.51093.5120012241260.51293.5140014261460.51493.5160016301660.51693.5180018331860.51893.5200020362060.52093.5三、表6更改为：表6平面和突面法兰用带定位环型缠绕式垫片尺寸(C型)单位为毫米公称公称压力尺寸PN16PN25PN40TT(DN)D:DDD:D,DD:DDD:D,D10243446244624344624461528385128385128385128203361334561334561456125405271405271405271405271324961824961824961824961823.04.540556792556792556792556792507086107708610770107708510765861021278610212786102127851021278099115142991151429911514299115142100128144162128144162128144168128144168