55°圆柱管螺纹的型式和尺寸

1、55。圆柱管螺纹的型式和尺寸PBSPP/BSPF(JISPF)BritishPipeThread(惠氏管螺纹)-圆柱(BSPP/BSPF)螺纹代号基本尺寸大径mmd=D螺距mmP每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高度H1底孔尺寸mmG1/81/89.7280.907289.1478.5660.5818.7G1/41/413.1571.3371912.30111.4450.85611.6G3/83/816.6621.3371915.80614.950.85615G1/21/220.9551.8141419.79318.6311.16219G5/85/822.9111.81414

2、21.74920.5871.16220.75G3/43/426.4411.8141425.27924.1171.16224.5G刀87/830.2011.8141429.03927.8771.16228G1133.2492.3091131.7730.2911.47930.5G11/811/837.8972.3091136.41834.9391.47935G11/411/441.912.3091140.43138.9521.47939.5G13/813/844.3232.3091142.84441.3651.47941.5G11/211/247.8032.3091146.32444.8451.4

3、7945G13/413/453.7462.3091152.26750.7881.47951G2259.6142.3091158.13556.6561.47957G21/421/465.712.3091164.23162.7521.47963G21/221/275.1842.3091173.70572.2261.47972.5G23/423/481.5342.3091180.05578.5761.47979G3387.8842.3091186.40584.9261.47985.G31/431/493.982.3091192.50191.0221.47991G31/231/2100.332.309

4、1198.35197.3721.47997.75G33/433/4106.682.30911105.201103.7221.479104G44113.032.30911111.55110.0721.479110.5G41/241/2125.732.30911124.251122.7721.479123G55138.432.30911136.951135.4721.479136G51/251/2151.132.30911149.651148.1721.479148.5G66163.832.30911162.351160.8721.479161.555。圆锥管螺纹型式和尺寸BSPT(JISPT)5

5、5。圆锥管螺纹(BSPT)螺纹代号基本尺寸英寸大径mmd=D螺距mmP每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高度H1圆弧尺寸r底孔尺寸mmR1/161/167.7230.907287.1426.5610.5810.1256.4R1/81/89.7280.907289.1478.5660.5810.1258.4R1/41/413.1571.3371912.30111.4450.8560.18411.2R3/83/816.6621.3371915.80614.9500.8560.18414.75R1/21/220.9551.8141419.79318.6311.1620.24918.

6、25R3/43/426.4411.8141425.27924.1171.1620.24923.75R1133.2492.3091131.7730.2911.4790.31730R11/411/441.9102.3091140.43138.9521.4790.31738.5R11/211/247.8032.3091146.32444.8451.4790.31744.5R2259.6142.3091158.13556.6561.4790.31756R21/221/275.1842.3091173.70572.2261.4790.31771R3387.8842.3091186.40584.9261.

7、4790.31785.5R44113.0302.30911111.551110.0721.4790.317110.5R55138.4302.30911136.951135.4721.4790.317136R66163.8302.30911162.351160.8721.4790.317161.5管螺纹的基本尺寸表（3-29）Gl/2、ZG1/2、表（3-29）螺纹基本尺寸（单位:mm）尺寸代号每25.4mm类的牙数n螺距p牙型咼度h圆弧半径r基面上的基本直径基准距离有效螺纹长度大径（基准直径）d=D中径d2=D2小径d1=D11/16280.9070.5810.1257.7237.1426.5

8、614.06.51/8280.9070.5810.1259.7289.1478.5664.06.51/4191.3370.5860.18413.15712.30111.4456.09.73/8191.3370.5860.18416.66215.80614.9506.410.11/2141.8141.1620.24920.95519.79318.6318.213.23/4141.8141.1620.24926.44125.27924.1179.514.51112.3091.4790.31733.24931.77030.29110.416.81.1/4112.3091.4790.31741.910

9、40.43138.95212.719.11.1/2112.3091.4790.31747.80346.32444.84512.719.12112.3091.4790.31759.61458.13556.65615.923.42.1/2112.3091.4790.31775.18473.70572.22617.526.73112.3091.4790.31787.88486.40584.92620.629.83.1/2112.3091.4790.317100.33098.85197.37222.231.44112.3091.4790.317113.030111.551110.07225.435.8

10、5112.3091.4790.317138.430136.951135.47228.640.16112.3091.4790.317163.830162.351160.87228.640.1锥管螺纹的基本尺寸表（3-28）1/2PT、1/2NPT、表（3-28）螺纹基本尺寸（单位:mm）尺寸代号每25.4mm类的牙数n基面上的基本直径基准距离大径（基准直径）d=D中径d2=D2小径d1=D11/16277.8957.1426.3894.0641/82710.2429.4898.7364.1021/41813.61612.48711.3585.7863/81817.05515.92614.7976

11、.0961/21421.22319.77218.3218.1283/41426.56825.11723.6668.611111.533.22831.46129.69410.1601.1/411.541.98540.21838.45110.6681.1/211.548.05446.28744.52010.668211.560.09258.32556.55811.0742.1/2872.69970.15967.61917.3233888.60886.06883.52819.4563.1/28101.31698.77696.23620.85348113.973111.433108.893121.43

12、8螺纹-各国的不同标记方法一.用螺纹密封的管螺纹（GB7306与ISO7/1相同）用螺纹密封的管螺纹不加填料或密封质就能防止渗漏。用螺纹密封的管螺纹有圆柱内螺纹和圆锥外螺纹、圆锥内螺纹和圆锥外螺纹两种连接形式。压力在5x105Pa以下时，用前一种连接已足够紧密，后一种连接通常只在高温及高压下采用。用螺纹密封的管螺纹内螺纹有圆锥、圆柱两种形式。外螺纹只有圆锥一种形式。牙型如下：锥度1：16，牙形角55，旧螺纹标准示例：ZG3/8；标记示例：圆锥内螺纹Rc3/8圆柱内螺纹Rp3/8圆锥外螺纹R3/8当螺纹为左旋螺纹时Rc3/8-LH（LH表示左旋螺纹）Rp1/2-DIN299R1/2DIN2999

13、GB7306规定的标记方法与ISO7/1的规定是一样的。在ISO7/1作出统一之前，标准号螺纹种类圆锥内螺纹圆柱内螺纹圆锥外螺纹ISOISO7/1-1982Rc1/2Rp1/2R1/2英国BS21-1973Rc1/2Rp1/2R1/2法国NFE03-004G1/2JG1/2各国的标记方法如下：德国DIN2999日本JIS130203PT1/2PS1/2PT1/2苏联rOCT6211KTPYBl/2KTPYB1/2GBGB133-74ZG1/2ZG1/2二非螺纹密封的管螺纹（GB7307）该螺纹标准与ISO228/1相同。牙型角：55，锥度：1：16。3.标记示例：11/2左旋内螺纹G11/2-

14、LH（右旋不标）11/2A级外螺纹G11/2A11/2B级外螺纹G11/2B内外螺纹装配G11/2/G11/2A4用途：非螺纹密封的管螺纹主要用于压力较低的不、煤气管道，连接时就加填料或密封质（麻丝、铅丹、聚四氟乙烯胶带等），以防止渗漏。5非螺纹密封的管螺纹与用螺纹密封的管螺纹相同点是：两者牙型一样均为55，相同规格螺纹的螺距、牙高、基本直径相同。6.非螺纹密封的管螺纹与用螺纹密封的管螺纹不同点是：用螺纹密封的管螺纹内螺纹有圆柱螺纹和圆锥螺纹两种形式，外螺纹只有圆锥螺纹一种形式。非螺纹密封的管螺纹不论内外螺纹都只有圆柱螺纹一种形式。两种螺纹部分规格的公差不同。非螺纹密封的内圆柱管螺纹可以和用螺

15、纹密封的外圆锥管螺纹相连接，但非螺纹密封的外圆柱管螺纹却不可以和用螺纹密封的内管螺纹形成用螺纹密封的连接。各国的不同标记方法：标准号螺纹种类圆柱内螺纹圆柱外螺纹ISOISO228/1-1982G1/2G1/2AB英国BS2779-1973法国NFE03-005德国DIN259日本JIS130202苏联OCT6357GBGB133-74G1/2G1/2R1/2PF1/2ABTPYB1/2心2Kn3G1/2G1/2ABHG1/2ABK1/2PF1/2ABTPYB1/2Kn2Kn3G1/2各国常用螺纹及其代号螺纹是应用非常广泛的紧固件，按螺距大小分为粗牙和细牙；按旋向分为左旋和右旋；按线数分为单线与

16、多线；按用途分，可分为联接螺纹、传动螺纹和承载螺纹三种。目前国际交往日益增多，备品备件的国产化也愈来愈多。目前主要存在的问题有：将美国英制螺纹1/2的螺距每英寸为13牙,误为与英国英制1/2每英寸为12牙;将锥管螺纹R的牙型角a=55。与a=60锥管螺纹NPT牙型角60昆用，导致无法联接及泄漏。以下将各国常用螺纹及其他代号作一简介。中国常用螺纹及代号中国常用螺纹及代号见表1所示。表1中国常用螺统陲代号名称标淮号代号标惟示例备注普通轍皱GBrT192197-19?lMNIW（懸,Ml庁汽1卫细牙）牙型角cc=50矩形螺纹无标桂X螺距方形如灯梯我蛭顿GBrT5?36.1796.41?g9TM0岁7

17、牙型角圧=却-锯齿螺纹GE?T13576.M357Ai992B牙型角a=2管，蛭管联接用细丈同晋通蛭纹MM2O1.5牙型角cc=50非螺纹密封的筒甥纹GBa7-2001aG3/4LH-左施（右症不标）牙型角cc-55n用螺纹艷封的锥莒镭纹GB)Ta6.U7306.2-2000RR3/4牙型常-5r【老代号対云E）60-圆锥莒揺魏(j&rn2716-1991NPTNPT3/4牙型角cc=50B（老代号肯X）GBm41-5-1992ZM-ZM10-标准萃苗牙型角a=60英国标准螺纹及代号英国标准螺纹及代号见表2所示。茗称标谁号代号标谁示例笛注惠氏标港螺纹(VMworththiea.di-.0S84

18、195SBSW牙BSF细牙牙/in3T8BSF-20牙/in牙型ffi=a=55n英国BA螺纹BSP3-1P51012牙型角=47.5表2孑编代号美国标准螺纹及代号美国标准螺纹及代号见表3所示。表3美国标灌螺磁代号标范号代号及示例牙型曲ASA-BII1549分四类：蹶(UN。N.细牙(UNF,NF.特细牙(UlNEJF)特种牙12N,18N)乂以每英寸牙数命名cc=aANHEI11982UNUNR(牙底为磁*=眇55英制恵氏螺纹厝以下每英寸牙数与英国恵氏蝮纹栢同1/r为止牙，V及严以上每英寸牙馥均対g牙没有i/r、勅聲、5/16、7“旷g曲、11/16等规格ANSIBI204-1P76NPTF

19、密封锥管幌纵如NPTF1/S27牙cc=50aUSASB;2-26S.NPT,NPTC,NPTRcc=60aUSASB226&NPTF,PTFSAEcc=50nANSIB11P74B13-1197fS米制幌散匕I13Mcc=50n日本标准螺纹及代号日本标准螺纹及代号见表4所示。表4日本标推螺驭代号代号标准示例标准目MMidJISB0205细聞螺统MJISB0207UNC3/SL6UNCJISB0206细牙恵氏蝮纹1JNFNO摂一並UNFJISBOJO:孔梯册螺纹TMTM20JISB0221勺y梯形蝮绞TMM20”JISB022355密封管幌纹-鏈螺険PTPT3/4JISB0203柱螺姿PSPS

20、3/4喊韭密封管爐纹PFPF1/2JISB0302专电线舊管用螺纹CC15JISB0204自行车用螺级通用鬲条用:BCB03/4JISBOS缝纫机用蝮纹,SMSM1/4牙40JISB0226灯口螺纹EEl。JISC7709汽车轮胎汽门螺统；TV；TVS:JISD4208自行车轮胎汽门螺纹CTV,：養TVS牙30JSD942：2螺纹代号ThreadCode一、英制螺纹（螺纹牙型角55度）ThreadofBritishstandard（Threadpitchshapeangle55BSW英国标准惠氏螺纹（粗牙）BritishStandardWhitworthThread（Coarse）BSF英国标

21、准惠氏螺纹（细牙）BritishStandardWhitworthThread（Fine）G直管螺纹（外螺纹分A、B两面级、丝锥分G、GD）Straightpipethread（Outside）threadinAB:tapsinG、GD）R锥管外螺纹（旧代号ZG;KG）Outsidepaperpipethread（OldthreadcodeZG,KG）RC锥管内螺纹（旧代号ZG;KG）Insidetaperpipethread（OldthreadcodeZG,KG）二、美制螺纹（螺纹牙型角60度）ThreadofAmericanstandard（Threadpitchshapeangle60UNC统一制粗牙螺纹（代替NC）Unifiedcoarsepitchthread（InsteadofNC）UNF统一制细牙螺纹（代替NF）Unifiedfinepitchthr