英制螺纹-规格--牙型-对照表

1、英制普通螺纹 (惠氏螺纹) - 小螺纹系列 (BA)5555圆圆锥锥管管螺螺纹纹型型式式和和尺尺寸寸BSPT是英制圆锥管螺纹标准：指螺纹的牙型角为55、螺纹具有1：16的锥度；NPT 是 National (American) Pipe Thread 的缩写，属于美国标准的 60 度锥管螺纹螺纹代号基本尺寸大径螺距每英寸牙数中径小径牙型高度圆弧尺寸底孔尺寸规格外径壁厚英 寸mmmmtpimm外螺纹H1rmmmmmmd=Dpd2=D2d3公称内径英寸R 1/161/167.7230.907287.1426.5610.5810.1256.4DN151/2 4分21.32.8R 1/81/89.72

2、80.907289.1478.5660.5810.1258.4DN20 3/426.92.8R 1/41/413.1571.3371912.30111.4450.8560.18411.2DN25133.73.2R 3/83/816.6621.3371915.80614.950.8560.18414.75DN321.2542.43.5R 1/21/220.9551.8141419.79318.6311.1620.24918.25DN401.548.33.5R 3/43/426.4411.8141425.27924.1171.1620.24923.75DN50260.33.8R 1133.2492

3、.3091131.7730.2911.4790.31730DN652.576.14R 1 1/41 1/441.912.3091140.43138.9521.4790.31738.5DN80388.94R 1 1/21 1/247.8032.3091146.32444.8451.4790.31744.5DN1004114.34R 2259.6142.3091158.13556.6561.4790.31756DN12551404.5R 2 1/22 1/275.1842.3091173.70572.2261.4790.31771DN1506168.34.5R 3387.8842.3091186.

4、40584.9261.4790.31785.5DN2008219.1 6.0(焊管)R 44113.032.30911111.551110.0721.4790.317110.5DN2008219.1 6.5(热镀锌)R 55138.432.30911136.951135.4721.4790.317136R 66163.832.30911162.351160.8721.4790.317161.5制制惠惠氏氏螺螺纹纹的的型型式式尺尺寸寸英制普通螺纹 (惠氏螺纹) - 粗牙 (BSW)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径Wwmmmmtpimm外螺纹H1mmd=Dpd2=D2d31

5、/16BSW1.5870.423601.3151.050.271.153/32BSW2.3810.529482.0411.7030.3381.91/8BSW3.1750.635402.7682.3620.4062.55/32BSW3.9690.793323.4592.9520.5073.23/16BSW4.7621.058244.0843.4070.6773.77/32BSW5.5561.058244.8784.2010.6774.51/4BSW6.351.27205.5374.7240.8135.15/16BSW7.9381.411187.0346.1310.9046.53/8BSW9.52

6、51.588168.5097.4921.0177.97/16BSW11.1131.814149.9518.7891.1629.21/2BSW12.72.1171211.3459.991.35510.45/8BSW15.8762.3091114.39712.9181.47913.43/4BSW19.0512.541017.42415.7981.62716.257/8BSW22.2262.822920.41918.6111.80719.251BSW25.43.175823.36821.3352.033221 1/8BSW28.5763.629726.25323.9292.32424.51 1/4B

7、SW31.7513.629729.42827.1042.32427.251 3/8BSW34.9264.233632.21529.5052.71130.251 1/2BSW38.14.233635.39132.682.71133.51 5/8BSW41.2775.08538.02434.7713.25335.51 3/4BSW44.4525.08541.19937.9463.25338.51 7/8BSW47.6275.6454 1/244.01240.3983.61441.252BSW50.8025.6454 1/247.18743.5733.61444.52 1/4BSW57.1526.3

8、5453.08649.024.066502 1/2BSW63.5026.35459.43655.374.066562 3/4BSW69.8537.2573 1/265.20560.5584.64761.53BSW76.2037.2573 1/271.55666.9094.647683 1/4BSW82.5537.8163 1/477.54872.5445.00573.75牙型代号3 1/2BSW88.9037.8163 1/483.89978.8945.005803 3/4BSW95.2548.467389.83284.415.42285.54BSW101.6048.467396.18290.

9、765.422924 1/4BSW107.9548.8352 7/8102.29796.6395.657984 1/2BSW114.3048.8352 7/8108.647102.995.657104.24 3/4BSW120.6659.2372 3/4114.74108.6255.9151105BSW127.0059.2372 3/4121.09115.1765.915116.55 1/4BSW133.3559.6772 5/8127.159120.9636.196122.55 1/2BSW139.7059.6772 5/8133.509127.3136.196128.55 3/4BSW14

10、6.05510.162 1/2139.549133.0436.506134.56BSW152.40610.162 1/2145.9139.3946.506141英英制制普普通通螺螺纹纹 - 细细牙牙 - BSFBSF英制普通螺纹 (惠氏螺纹) - 细牙 (BSW)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径BSFmmmmtpimm外螺纹H1mmd=Dpd2=D2d33/16BSF4.7630.794324.2553.7470.50847/32BSF5.5560.907284.9754.3940.5814.61/4BSF6.350.977265.7255.10.6255.39/32B

11、SF7.1420.977266.5185.8930.6256.15/16BSF7.9381.156227.1996.4590.7396.83/8BSF9.5251.27208.7127.8990.8138.37/16BSF11.1131.4111810.2099.3040.9049.71/2BSF12.71.5881611.68410.6681.01711.19/16BSF14.2881.5881613.27212.2561.01712.75/8BSF15.8751.8141414.71213.5491.1621411/16BSF17.4631.8141416.315.1371.16215.5

12、3/4BSF19.052.1171217.69316.3361.35516.7513/16BSF20.6382.1171219.28117.9241.35518.257/8BSF22.2252.3091120.74719.2691.47919.751.00BSF25.42.541023.77422.1481.62722.751 1/8BSF28.5752.822926.76924.9631.80726.51 1/4BSF31.752.822929.94428.1381.80728.751 3/8BSF34.9253.175832.89330.8612.03331.51 1/2BSF38.13.

13、175836.06834.0362.03334.51 5/8BSF41.2753.175839.24337.2112.033381 3/4BSF44.453.629742.12639.8022.32440.52 BSF50.83.629748.47646.1522.324472 1/4BSF57.154.234654.4451.732.711532 1/2BSF63.54.234660.7958.082.711592 3/4BSF69.854.234667.1464.432.711-3 BSF76.25.08572.94669.6923.253-3 1/4BSF82.555.08579.296

14、76.0423.253-3 1/2BSF88.95.6454 1/285.28581.673.614-3 3/4BSF95.255.6454 1/291.63588.023.614-4 BSF101.65.6454 1/297.98594.373.614-4 1/4BSF107.956.354103.88699.8224.066-5555圆圆柱柱管管螺螺纹纹的的型型式式和和尺尺寸寸British Pipe Thread (惠氏管螺纹) - 圆柱 (BSPP/BSPF)螺纹代号基本尺寸大径螺距每英寸牙数中径小径牙型高度底孔尺寸mmmmtpimm外螺纹H1mmd=Dpd2=D2d3G 1/81/8

15、9.7280.907289.1478.5660.5818.7G 1/41/413.1571.3371912.30111.4450.85611.6G 3/83/816.6621.3371915.80614.950.85615G 1/21/220.9551.8141419.79318.6311.16219G 5/85/822.9111.8141421.74920.5871.16220.75G 3/43/426.4411.8141425.27924.1171.16224.5G 7/87/830.2011.8141429.03927.8771.16228G 1133.2492.3091131.7730

16、.2911.47930.5G 1 1/81 1/837.8972.3091136.41834.9391.47935G 1 1/41 1/441.912.3091140.43138.9521.47939.5G 1 3/81 3/844.3232.3091142.84441.3651.47941.5G 1 1/21 1/247.8032.3091146.32444.8451.47945G 1 3/41 3/453.7462.3091152.26750.7881.47951G 2259.6142.3091158.13556.6561.47957G 2 1/42 1/465.712.3091164.2

17、3162.7521.47963G 2 1/22 1/275.1842.3091173.70572.2261.47972.5G 2 3/42 3/481.5342.3091180.05578.5761.47979G 3387.8842.3091186.40584.9261.47985.5G 3 1/43 1/493.982.3091192.50191.0221.47991G 3 1/23 1/2100.332.3091198.35197.3721.47997.75G 3 3/43 3/4106.682.30911105.201103.7221.479104G 44113.032.30911111

18、.55110.0721.479110.5G 4 1/24 1/2125.732.30911124.251122.7721.479123G 55138.432.30911136.951135.4721.479136G 5 1/25 1/2151.132.30911149.651148.1721.479148.5G 66163.832.30911162.351160.8721.479161.5RC2英寸锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高（深）=2.3090.64即1.479，锥度是固定的即1：16R等于1/32乘以长度1/32意思是，锥螺纹的锥度是1：16 ，单边就是1

19、：32长度意思是：定位点加有效长度比如我定位3.0，有效长度是12.0R=1/32 X（3+12）=0.46875 1 1、密密封封管管螺螺纹纹（R R）英英制制密密封封管管螺螺纹纹的的基基本本尺尺寸寸及及其其公公差差配配合合方方式式英英制制密密封封管管螺螺纹纹有有两两种种配配合合方方式式：圆圆柱柱内内螺螺纹纹与与圆圆锥锥外外螺螺纹纹组组成成“柱柱/ /锥锥”配配合合；圆圆锥锥内内螺螺纹纹与与圆圆锥锥外外螺螺纹纹组组成成“锥锥/ /锥锥”配配合合. .欧欧洲洲国国家家主主要要采采用用“柱柱/ /锥锥”配配合合螺螺纹纹；而而欧欧洲洲以以外外国国家家则则主主要要采采用用“柱柱/ /锥锥”配配合合螺

20、螺纹纹. .两两种种螺螺纹纹的的检检验验量量规规存存在在一一定定不不同同；目目前前的的ISOISO英英制制密密封封管管螺螺纹纹量量规规标标准准（ISOISO 7-27-2：20002000）是是按按“柱柱/ /锥锥”配配合合体体系系设设计计的的. .编编辑辑本本段段密密封封管管螺螺纹纹的的标标记记英英制制密密封封管管螺螺纹纹的的完完整整标标记记由由螺螺纹纹特特征征代代号号、螺螺纹纹尺尺寸寸代代号号和和旋旋向向代代号号组组成成. .英英制制密密封封圆圆柱柱内内螺螺纹纹的的特特征征代代号号为为：RPRP；英英制制密密封封圆圆锥锥内内螺螺纹纹的的特特征征代代号号为为：RCRC；英英制制密密封封圆圆锥

21、锥外外螺螺纹纹的的特特征征代代号号为为：R1R1（与与英英制制密密封封圆圆柱柱内内螺螺纹纹配配合合使使用用）；R2R2（与与英英制制密密封封圆圆锥锥内内螺螺纹纹配配合合使使用用）；左左旋旋螺螺纹纹的的旋旋向向代代号号为为LHLH；右右旋旋螺螺纹纹的的旋旋向向代代号号省省略略不不标标. .对对密密封封管管螺螺纹纹，利利用用RP/R1RP/R1，RC/R2RC/R2分分别别表表示示“柱柱/ /锥锥” 和和“锥锥/ /锥锥”螺螺纹纹副副. .2 2、非非密密封封管管螺螺纹纹英英制制非非密密封封管管的的基基本本尺尺寸寸及及其其极极限限偏偏差差标标记记: :英英制制非非密密封封管管螺螺纹纹的的完完整整标

22、标记记由由螺螺纹纹特特征征代代号号，螺螺纹纹尺尺寸寸代代号号，中中径径公公差差等等级级代代号号和和旋旋向向代代号号组组成成. .英英制制非非密密封封圆圆柱柱螺螺纹纹的的特特征征代代号号为为：G G对对英英制制非非密密封封圆圆柱柱内内螺螺纹纹，其其中中径径公公差差等等级级代代号号省省略略不不标标；而而英英制制非非密密封封圆圆柱柱外外螺螺纹纹的的中中径径公公尺尺等等级级代代号号分分别别为为A A和和B.B.左左旋旋螺螺纹纹的的旋旋向向代代号号为为LHLH；右右旋旋螺螺纹纹的的旋旋向向代代号号省省略略不不标标. .当当表表示示英英制制非非密密封封管管螺螺纹纹的的螺螺纹纹副副时时，仅仅标标注注外外螺螺纹纹的的标标记记代代号号. .示示例例：尺尺寸寸代代号号为为2 2的的右右旋旋，非非密密封封圆圆柱柱内内螺螺纹纹：G2G2尺尺寸寸代代号号为为3 3的的A A级级，右右旋旋，非非密密封封圆圆柱柱外外螺螺纹纹：G3AG3A尺尺寸寸代代号号为为4 4的的B B级级，左左旋旋，非非密密封封圆圆柱柱外外螺螺纹纹：G4G4 B-LHB-LH