英制螺纹_规格__牙型_对照表

英制普通螺纹 (惠氏螺纹) -- 小螺纹系列 (BA)55°圆锥管螺纹型式和尺寸：指螺纹的牙型角为55°、螺纹具有1：16的锥度；NPT 是 National (American) Pipe T每英寸牙数tpi28281111基本尺寸英 寸螺纹代号R 1/16R 1/8R 1/4R 3/8R 1/2R 3/4R 1R 1 1/4R 1 1/2R 2R 2 1/2R 3R 4R 5R 61/16＂1/8＂1/4＂3/8＂1/2＂3/4＂1＂1 1/4＂1 1/2＂2＂2 1/2＂3＂4＂5＂6＂大径mmd=D7.7239.72813.15716.66220.95526.44133.24941.9147.80359.61475.18487.884113.03138.43163.83螺距mmp0.9070.9071.3371.3371.8141.8142.3092.3092.3092.3092.3092.3092.3092.3092.309中径mmd2=D27.1429.14712.30115.80619.79325.27931.7740.43146.32458.13573.70586.405111.551136.951162.351小径外螺纹d36.5618.56611.44514.9518.63124.11730.29138.95244.84556.65672.22684.926110.072135.472160.872牙型高度H10.5810.5810.8560.8561.1621.1621.4791.4791.4791.4791.4791.4791.4791.4791.479名义尺寸Ww1/16＂3/32＂1/8＂5/32＂3/16＂7/32＂1/4＂5/16＂3/8＂7/16＂1/2＂5/8＂3/4＂牙型代号BSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSW大径mmd=D1.5872.3813.1753.9694.7625.5566.357.9389.52511.11312.715.87619.051制惠氏螺纹的型式尺寸英制普通螺纹 (惠氏螺纹) -- 粗牙 (BSW)每英寸牙螺距数中径小径mmtpimm外螺纹pd2=D2d30.423601.3151.050.529482.0411.7030.635402.7682.3620.793323.4592.9521.058244.0843.4071.058244.8784.2011.27205.5374.7241.411187.0346.1311.588168.5097.4921.814149.9518.7892.1171211.3459.992.3091114.39712.9182.541017.42415.798牙型高H10.270.3380.4060.5070.6770.6770.8130.9041.0171.1621.3551.4791.627

7/8＂1＂1 1/8＂1 1/4＂1 3/8＂1 1/2＂1 5/8＂1 3/4＂1 7/8＂2＂2 1/4＂2 1/2＂2 3/4＂3＂3 1/4＂3 1/2＂3 3/4＂4＂4 1/4＂4 1/2＂4 3/4＂5＂5 1/4＂5 1/2＂5 3/4＂6＂BSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSWBSW22.22625.428.57631.75134.92638.141.27744.45247.62750.80257.15263.50269.85376.20382.55388.90395.254101.604107.954114.304120.665127.005133.355139.705146.055152.4062.8223.1753.6293.6294.2334.2335.085.085.6455.6456.356.357.2577.2577.8167.8168.4678.4678.8358.8359.2379.2379.6779.67710.1610. 1/24 1/2443 1/23 1/23 1/43 1/4332 7/82 7/82 3/42 3/42 5/82 5/82 1/22 1/220.41923.36826.25329.42832.21535.39138.02441.19944.01247.18753.08659.43665.20571.55677.54883.89989.83296.182102.297108.647114.74121.09127.159133.509139.549145.918.61121.33523.92927.10429.50532.6834.77137.94640.39843.57349.0255.3760.55866.90972.54478.89484.4190.7696.639102.99108.625115.176120.963127.313133.043139.3941.8072.0332.3242.3242.7112.7113.2533.2533.6143.6144.0664.0664.6474.6475.0055.0055.4225.4225.6575.6575.9155.9156.1966.1966.5066.506英制普通螺纹 -- 细牙 -- BSF英制普通螺纹 (惠氏螺纹) -- 细牙 (BSW)每英寸牙大径螺距数中径小径mmmmtpimm外螺纹d=Dpd2=D2d34.7630.794324.2553.7475.5560.907284.9754.3946.350.977265.7255.17.1420.977266.5185.8937.9381.156227.1996.4599.5251.27208.7127.89911.1131.4111810.2099.30412.71.5881611.68410.66814.2881.5881613.27212.25615.8751.8141414.71213.549名义尺寸BSF3/167/321/49/325/163/87/161/29/165/8牙型代号BSFBSFBSFBSFBSFBSFBSFBSFBSFBSF牙型高H10.5080.5810.6250.6250.7390.8130.9041.0171.0171.162

11/163/413/167/81.001 1/81 1/41 3/81 1/21 5/81 3/422 1/42 1/22 3/433 1/43 1/23 3/444 1/4BSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSFBSF17.46319.0520.63822.22525.428.57531.7534.92538.141.27544.4550.857.1563.569.8576.282.5588.995.25101.6107.951.8142.1172.1172.3092.542.8222.8223.1753.1753.1753.6293.6294.2344.2344.2345.085.085.6455.6455.6456.35 1/24 1/24 1/2416.317.69319.28120.74723.77426.76929.94432.89336.06839.24342.12648.47654.4460.7967.1472.94679.29685.28591.63597.985103.88615.13716.33617.92419.26922.14824.96328.13830.86134.03637.21139.80246.15251.7358.0864.4369.69276.04281.6788.0294.3799.8221.1621.3551.3551.4791.6271.8071.8072.0332.0332.0332.3242.3242.7112.7112.7113.2533.2533.6143.6143.6144.066螺纹代号G 1/8G 1/4G 3/8G 1/2G 5/8G 3/4G 7/8G 1G 1 1/8G 1 1/4G 1 3/8G 1 1/2G 1 3/4G 2G 2 1/4G 2 1/2G 2 3/4基本尺寸1/8＂1/4＂3/8＂1/2＂5/8＂3/4＂7/8＂1＂1 1/8＂1 1/4＂1 3/8＂1 1/2＂1 3/4＂2＂2 1/4＂2 1/2＂2 3/4＂55°圆柱管螺纹的型式和尺寸British Pipe Thread (惠氏管螺纹) -- 圆柱 (BSPP/BSPF)每英寸牙大径螺距数中径小径牙型高度mmmmtpimm外螺纹H1d=Dpd2=D2d39.7280.907289.1478.5660.58113.1571.3371912.30111.4450.85616.6621.3371915.80614.950.85620.9551.8141419.79318.6311.16222.9111.8141421.74920.5871.16226.4411.8141425.27924.1171.16230.2011.8141429.03927.8771.16233.2492.3091131.7730.2911.47937.8972.3091136.41834.9391.47941.912.3091140.43138.9521.47944.3232.3091142.84441.3651.47947.8032.3091146.32444.8451.47953.7462.3091152.26750.7881.47959.6142.3091158.13556.6561.47965.712.3091164.23162.7521.47975.1842.3091173.70572.2261.47981.5342.3091180.05578.5761.479

G 3G 3 1/4G 3 1/2G 3 3/4G 4G 4 1/2G 5G 5 1/2G 63＂3 1/4＂3 1/2＂3 3/4＂4＂4 1/2＂5＂5 1/2＂6＂87.88493.98100.33106.68113.03125.73138.43151.13163.832.3092.3092.3092.3092.3092.3092.3092.3092.31111111186.40592.50198.351105.201111.55124.251136.951149.651162.35184.92691.02297.372103.722110.072122.772135.472148.172160.8721.4791.4791.4791.4791.4791.4791.4791.4791.479RC2英寸锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高（深）=2.309×0.64即1.479，锥度是固定的即1：R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1：32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、密封管螺纹（R）　　英制密封管螺纹的基本尺寸及其公差　　配合方式　　英制密封管螺纹有两种配合方式：圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合；圆锥内螺纹与圆锥外螺纹组成“锥/锥”配合.　　欧洲国家主要采用“柱/锥”配合螺纹；而欧洲以外国家则主要采用“柱/锥”配合螺纹.两种螺纹的检验量规存在一定不同；目前的IS编辑本段密封管螺纹的标记　　英制密封管螺纹的完整标记由螺纹特征代号、螺纹尺寸代号和旋向代号组成.　　英制密封圆柱内螺纹的特征代号为：RP；　　英制密封圆锥内螺纹的特征代号为：RC；　　英制密封圆锥外螺纹的特征代号为：R1（与英制密封圆柱内螺纹配合使用）；　　R2（与英制密封圆锥内螺纹配合使用）；　　左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标.　　对密封管螺纹，利用RP/R1，RC/R2分别表示“柱/锥” 和“锥/锥”螺纹副.　　2、非密封管螺纹　　英制非密封管的基本尺寸及其极限偏差　　标记:　　英制非密封管螺纹的完整标记由螺纹特征代号，螺纹尺寸代号，中径公差等级代号和旋向代号组成.　　英制非密封圆柱螺纹的特征代号为：G　　对英制非密封圆柱内螺纹，其中径公差等级代号省略不标；而英制非密封圆柱外螺纹的中径公尺等级代号分别为A和B.　　左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标.　　当表示英制非密封管螺纹的螺纹副时，仅标注外螺纹的标记代号.　　示例：　　尺寸代号为2的右旋，非密封圆柱内螺纹：G2　　尺寸代号为3的A级，右旋，非密封圆柱外螺纹：G3A　　尺寸代号为4的B级，左旋，非密封圆柱外螺纹：G4 B-LH　　尺寸代号为2的右旋，非密封圆柱内螺纹与A级圆柱外螺纹组成的螺纹副：G2A　　加工内孔螺纹的是管螺纹丝锥 加工外螺纹的有板牙。

　　其他：　　55°圆锥管螺纹的转化　　55°圆锥管螺纹，是指螺纹的牙型角为55°、螺纹具有1：16的锥度。该系列螺纹在世界上应用广泛，它的代号，各国规定不同。　　中国 英国 法国 日本 iso　　代号 ZG R（外） G PT R　　R(外螺纹) Rc（内） R R Rc　　60°圆锥管螺纹的转化　　60°圆锥管螺纹是指牙型角为60°、螺纹锥度为1：16的管螺纹，此系列螺纹在我国机床行业和美国、前苏联应用。它的代号，我

ipe Thread 的缩写，属于规格外径mm公称内径DN15DN20DN25DN32DN40DN50DN65DN80DN100DN125DN150DN200DN200英寸1/2 4分 3/411.251.522.534568821.326.933.742.448.360.376.188.9114.3140168.3219.16.0(焊管)219.16.5(热镀锌)壁厚mm2.82.83.23.53.53.84444.54.5最小壁厚mm2.452.452.83.063.063.3253.5圆弧尺寸底孔尺寸rmm0.1250.1250.1840.1840.2490.2490.3170.3170.3170.3170.3170.3170.3170.3170.3176.48.411.214.7518.2523.753038.544.5567185.5110.5136161.5底孔直径mm1.151.92.53.23.74.55.16.57.99.210.413.416.25

19.252224.527.2530.2533.535.538.541.2544.5505661.56873.758085.59298104.2110116.5122.5128.5134.5141底孔直径mm44.65.36.16.88.39.711.112.714

15.516.7518.2519.7522.7526.528.7531.534.53840.5475359-------BSPF)底孔尺寸mm8.711.6151920.7524.52830.53539.541.54551576372.579

85.59197.75104110.5123136148.5161.5×0.64即1.479，锥度是固定的即1：16纹与圆锥外螺纹组成“锥/锥”配合.螺纹的检验量规存在一定不同；目前的ISO英制密封管螺纹量规标准（ISO 7-2：2000）是按“柱/锥”配合体系设计的.中径公尺等级代号分别为A和B.

上应用广泛，它的代号，各国规定不同。行业和美国、前苏联应用。它的代号，我国过去规定为K，后来规定为Z，现在改为NPT.