英制钢管及螺纹规格表.pdf

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1、钢管的公称通径DN和外径φ的对照表本表中的钢管外径有A、B两个系列，A系列为国际通用系列（俗称英制管）；B系列为国内沿用系列（俗称公制管）。公称通径DN101520253240506580100英制（英寸）1/4"1/2"3/4"1"11/4"11/2"2"21/2"3"4"钢管A17.221.326.933.742.448.360.376.188.9114.3外径B141825323845577689108公称通径DN125150200250300350400450500600英制（英寸）5"6"8"10

2、"12"14"16"18"20"24"钢管A139.7168.3219.1273323.9355.36406.4457508610外径B133159219273325377426480530630公称通径DN700800900100012001400160018002000英制（英寸）28"32"36"40"48"56"64"72"80"钢管A711813914101612191422162618292032外径B720820920102012201420162018202020英制55°圆柱管螺纹的尺寸（

3、国内管道、阀门通用连接螺纹）BritishPipeThread(惠氏管螺纹)--圆柱(BSPP/BSPF)大径螺距每英寸牙数中径小径螺纹牙高内螺纹底公称尺寸螺纹代号mmmmtpimmmmmm孔直径英寸d=Dpd2=D2d1=D1hmmG1/81/8＂9.730.907289.1478.5660.5818.7G1/41/4＂13.21.3371912.30111.450.85611.6G3/83/8＂16.71.3371915.80614.950.85615G1/21/2＂211.8141419.79318.

4、631.16219G5/85/8＂22.91.8141421.74920.591.16220.75G3/43/4＂26.41.8141425.27924.121.16224.5G7/87/8＂30.21.8141429.03927.881.16228G11＂33.22.3091131.7730.291.47930.5G11/811/8＂37.92.3091136.41834.941.47935G11/411/4＂41.92.3091140.43138.951.47939.5G13/813/8＂44.32.3

5、091142.84441.371.47941.5G11/211/2＂47.82.3091146.32444.851.47945G13/413/4＂53.72.3091152.26750.791.47951G22＂59.62.3091158.13556.661.47957G21/421/4＂65.72.3091164.23162.751.47963G21/221/2＂75.22.3091173.70572.231.47972.5G23/423/4＂81.52.3091180.05578.581.47979G3

6、3＂87.92.3091186.40584.931.47985.5G31/431/4＂942.3091192.50191.021.47991G31/231/2＂1002.3091198.35197.371.47997.75G33/433/4＂1072.30911105.2103.71.479104G44＂1132.30911111.55110.11.479110.5G41/241/2＂1262.30911124.25122.81.479123G55＂1382.30911136.95135.51.479136

7、G51/251/2＂1512.30911149.65148.21.479148.5G66＂1642.30911162.35160.91.479161.5英制55°圆锥管螺纹的尺寸（国内管道、阀门通用密封螺纹）大径螺距每英寸牙数中径小径螺纹牙高圆弧尺寸内螺纹底公称尺寸螺纹代号mmmmtpimmmmmmmm孔直径英寸d=Dpd2=D2d1=D1hrmmR1/161/16＂7.720.907287.1426.5610.5810.1256.4R1/81/8＂9.730.907289.1478.5660.5810.1

8、258.4R1/41/4＂13.21.3371912.30111.450.8560.18411.2R3/83/8＂16.71.3371915.80614.950.8560.18414.75R1/21/2＂211.8141419.79318.631.1620.24918.25R3/43/4＂26.41.8141425.27924.121.1620.24923.75R11＂33.22.3091131.7730.291