管螺纹尺寸表

1/16280.9070.5811分1/8280.9070.5812分DN81/4191.3370.5863分3/8191.3370.5864分DN151/221.32.82.45141.8141.1626分DN203/426.92.82.45141.8141.1621寸DN25133.73.22.8112.3091.4791.2寸DN321.1/442.43.53.06112.3091.4791.5寸DN401.1/248.33.53.06112.3091.4792寸DN50260.33.83.325112.3091.4792.5寸DN652.1/276.143.5112.3091.4793寸DN80388.94112.3091.4793.5寸3.1/2112.3091.4794寸DN1004114.34112.3091.4795寸DN12551404.5112.3091.4796寸DN1506168.34.5112.3091.4798寸DN2008219.110寸DN250大径（基准直径）d=D中径d2=D21/16277.8957.1421/82710.2429.4891/41813.61612.4873/81817.05515.9261/21421.22319.7723/41426.56825.11711233.22831.4611.1/41241.98540.2181.1/21248.05446.28721260.09258.3252.1/2872.69970.1593888.60886.0683.1/28101.31698.77648113.973111.4331英寸=25.4mm=8分 以上壁厚尺寸以焊管、镀锌管理论重量为例（锥管螺纹的基本尺寸表（3-28）1、尺寸代号每25.4mm类的牙数n基面上的基本直径管螺纹的基本尺寸表（3-29）G1/2 、ZG1/2 、（以焊通称尺寸对应口径尺寸代号外径壁厚最小壁厚每25.4mm类的牙数n螺距p牙型高度h大径（基准直径）d=D中径d2=D2小径d1=D10.1257.7237.1426.56146.50.1259.7289.1478.56646.50.18413.15712.30111.44569.70.18416.66215.80614.950610.10.24920.95519.79318.631813.20.24926.44125.27924.1171014.50.31733.24931.77030.2911016.80.31741.91040.43138.9521319.10.31747.80346.32444.8451319.10.31759.61458.13556.6561623.40.31775.18473.70572.2261826.70.31787.88486.40584.9262129.80.317100.33098.85197.3722231.40.317113.030111.551110.0722535.80.317138.430136.951135.4722940.10.317163.830162.351160.8722940.1小径d1=D16.3894.0648.7364.10211.3585.78614.7976.09618.3218.12823.6668.61129.69410.16038.45110.66844.52010.66856.55811.07467.61917.32383.52819.45696.23620.853108.89321.438为例（按GB/T3091-2001标准执行）28）1/2PT 、1/2NPT、本直径基准距离基准距离有效螺纹长度（以焊管、镀锌管为例）圆弧半径r≈基面上的基本直径

大径（基准直径）d=D中径d2=D2小径d1=D11/16280.9070.5810.1257.7237.1426.56146.51分1/8280.9070.5810.1259.7289.1478.56646.52分DN81/4191.3370.5860.18413.15712.30111.44569.73分3/8191.3370.5860.18416.66215.80614.950610.14分DN151/221.32.82.45141.8141.1620.24920.95519.79318.631813.26分DN203/426.92.82.45141.8141.1620.24926.44125.27924.1171014.51寸DN25133.73.22.8112.3091.4790.31733.24931.77030.2911016.81.2寸DN321.1/442.43.53.06112.3091.4790.31741.91040.43138.9521319.11.5寸DN401.1/248.33.53.06112.3091.4790.31747.80346.32444.8451319.12寸DN50260.33.83.325112.3091.4790.31759.61458.13556.6561623.42.5寸DN652.1/276.143.5112.3091.4790.31775.18473.70572.2261826.73寸DN80388.94112.3091.4790.31787.88486.40584.9262129.83.5寸3.1/2112.3091.4790.317100.33098.85197.3722231.44寸DN1004114.34112.3091.4790.317113.030111.551110.0722535.85寸DN12551404.5112.3091.4790.317138.430136.951135.4722940.16寸DN1506168.34.5112.3091.4790.317163.830162.351160.8722940.18寸DN2008219.110寸DN250

管螺纹尺寸对照表(全)

管螺纹尺寸对照表

管螺纹是管道连接中最为常见的一种连接方式，用于连接管道和阀门、法兰等连接件。管螺纹的尺寸对照表是指不同材质、不同规格的管螺纹的尺寸规格标准，是管螺纹连接时必要的参考。

下面是管螺纹尺寸对照表，供大家参考：

1.螺纹尺寸（英寸）

1/8 1/4 3/8 1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 3 4

11.5 18 18 14 14 11.5 11.5 11.5 11.5

27 27 27 18 18 14 14 11.5 11.5 11.5

Close NPT 21.56 21.56 17.53 17.53 13.71 13.46 13.01 12.57

12.07 12.06

2.螺纹尺寸(mm)

6 8 10 15 20 25 32 40 50 65 80 100

G1/8 G1/4 G3/8 G1/2 G3/4 G1 G1-1/4 G1-1/2 G2 G2-1/2 G3 G4

9.728 13.157 16.662 20.995 26.441 33.249 41.91 47.803 60.263

76.108 89.892 114.3

10 13.5 16.9 21.34 26.67 33.4 42.2 48.3 60.3 76.3 90.2 114.3

Rc1/8 Rc1/4 Rc3/8 Rc1/2 Rc3/4 Rc1 Rc1-1/4 Rc1-1/2 Rc2 Rc2-1/2 Rc3 Rc4

9.728 13.157 16.662 20.995 26.441 33.249 41.91 47.803 60.263

76.108 89.892 114.3

3.螺纹尺寸（牙距和牙深）

英寸(mm) 牙距P(mm) 牙深h(mm)

1/8（3.18mm） 0.907 2.788

1/4（6.35mm） 0.722 3.175

55°圆锥管螺纹(BSPT)

螺纹代号 基本尺寸

英

寸 大径

mm

d=D 螺距

mm

p 每英寸牙数

tpi 中径

mm

d2=D2 小径

外螺纹

d3 牙型高度

H1 圆弧尺寸

r 底孔尺寸

mm

R 1/16 1/16" 28

R 1/8 1/8" 28

R 1/4 1/4" 19

R 3/8 3/8" 19

R 1/2 1/2" 14

R 3/4 3/4" 14

R 1 1" 11 30

R 1 1/4 1 1/4" 11

R 1 1/2 1 1/2" 11

R 2 2" 11 56

R 2 1/2 2 1/2" 11 71

R 3 3" 11

R 4 4" 11

R 5 5" 11 136

R 6 6" 11

管螺纹尺寸表

55°圆柱管螺纹的型式和尺寸

British Pipe Thread (惠氏管螺纹) -- 圆柱 (BSPP/BSPF)

螺纹代号 基本尺寸 大径

mm

d=D 螺距

mm

p 每英寸牙数

tpi 中径

mm

d2=D2 小径

外螺纹

d3 牙型高度

H1 底孔尺寸

mm

G 1/8 1/8" 28

G 1/4 1/4" 19

G 3/8 3/8" 19 15

G 1/2 1/2" 14 19

G 5/8 5/8" 14

G 3/4 3/4" 14

G 7/8 7/8" 14 28

G 1 1" 11 G 1 1/8 1 1/8" 11 35

G 1 1/4 1 1/4" 11

G 1 3/8 1 3/8" 11