ZH300-2009高压管、管件及紧固件标准(3)

330±1%430.3421.7453.27175

219×22175±1%221.2216.8108.27245×24197±1%247.5242.5132.51273×28217±1%275.7270.3171.38299×30239±1%302296201.01325×30265±1%328.3321.7221.09356×32292±1%359.6352.4259.02377×36305±1%380.8373.2305.77426×40

346

±1%

430.3

421.7

384.58

螺纹（管子、管件、紧固件）

6.1管子、管件园根螺纹数据按表6的规定。

表6

英制、普通螺纹对

照

公称直径（mm）

公称尺寸

螺距

PN260PN220PN160

螺纹代号

中径

小径

工作长度

园角半径

中径

小径

中径

外螺纹

内螺纹

管子、管件园根螺纹数据

管子、管件普通螺纹加工尺寸（mm）

DNDNDNdd2d1hr最大最小最大最小最大最小最大最小

610

610

610

M14×1.56G/6hM24×2

6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h6G/6h

1.52222223344466666666

1424334248526580100

13.02612．3760.81222.70121.8351.08331.70130.8351.08340.70139.8351.08346.70145.8351.08350.70149.8351.08363.70162.8351.08378.05276.7521.62498.05296.7521.624

0.2160.2890.2890.2890.2890.2890.2890.4330.4330.5770.5770.5770.8660.8660.8660.8660.8660.8660.8660.866

1424334248526580

13.76413.02612．88612．70812．67613．23813．20623.72022.70122．53122．28821．87322．96322．73932.72031.70131．53131．28830．87331．96331．73941.72040.70140．53140．28839．87340．96340．73947.72046.70146．52145．28845．87346．97546．73951.72050.70150．52149．28849．87350．97550．73964.72063.70163．52164．28862．87363．97563．73979.62578.05277．84077．30076．80078．40078．100

15

152532-40506580100125150175200

2532-40506580100125150175200225

2532-40506580100125150175200225

M33×2M42×2M48×2M52×2M65×2M80×3M100×3M125×4M155×4M175×4M215×6M240×6M270×6

10099.62598.05297．82897．30096．80098．40098．100125124.525122.402462155154.525152.402462175174.525172.402462215240270295320350370420

214.4211.103210.788209.385208.585211.608211.183239.4236.103235.788234.385233.585236.608236.183269.4266.103265.788264.385263.585266.608266.183294.4291.103290.788289.385288.585291.608291.183319.4316.103315.788314.385313.585316.608316.183349.4346.103345.788344.385343.585346.608346.183369.4366.103365.788364.385363.585366.608366.183419.4416.103415.788415.385414.585416.608416.183

125122.402120.6702.165155152.402150.6702.165175172.402170.6702.165215211.103208.5053.248240236.103233.5053.248270266.103263.5053.248295291.103288.5053.248320316.103313.5053.248350346.103343.5053.248370366.103363.5053.248420416.103413.5053.248

(225)(250)(250)M295×6225250

250300

250300

M320×6M350×6

(275)(300)(300)M350×6300

350

350

M420×6

6.2紧固件采用普通螺纹，其园根螺纹数据按GB/T192、GB/T193、GB/T196、GB/T197的规定。6.3普通螺纹的螺距按GB/T192、GB/T193、GB/T196、GB/T197的规定，外螺纹牙型槽底为圆弧形。6.4螺纹精度按GB/T197选取中等级精度。为了保证足够的接触高度，选用G/h配合，因本标准选用螺纹的旋合长度大部为N组内，故不考虑旋合长度的影响。内螺纹公差全部选用6G，外螺纹公差全部为6h。6.5所有外螺纹牙底形状为园根，其曲线部分的半径R不应小于0.125P。

7螺纹连接用管子及管件的端部加工（包括阀门）

7.1螺纹连接用管子及管件的端部加工（包括阀门）按图1和表7的规定，当管内径DB超出表7规定时应按GB/T20801.3要求进行强度计算。7.2螺纹收尾按GB3规定。

图1螺纹连接用管子及管件的端部加工图表7管子及管件端部加工尺寸

公称公称磨光倒角螺纹车光倒角压力直径

螺纹外径内径表面直径长度尺寸半径DN

DDHDBD1D2L1L2r(mm)(mm)(mm)(mm)(mm)(mm)(mm)6

M14×1.514＜71010.620253M24×224＜14.11819.128333M33×235＜20.5272930353M42×243＜27.6353832405M48×249＜32.1414435435M65×2

68＜44.6586242505260

M80×383＜54.97076.250605M100×3102＜70.4909660705M125×4127＜88.411211875858M155×4159＜110.7130149901008M175×4180＜125.7155166951058M215×6

219＜154.21932061151258175

M240×6245＜1732182331351458M270×6273＜196.32432621451558M295×6299＜215.12752871551658M320×6325＜233.92953121801908M350×6356＜256.53263421952058M370×6377＜271.53503621902008M420×6

426

＜309.8

385

412

225

235

8

7（续）

公称公称倒角螺纹车光倒角压力

直径螺纹外径内径磨光表面直径长度尺寸半径DNDDHDBD1D2L1L2r(mm)(mm)(mm)(mm)(mm)(mm)(mm)175

M240×6245＜182.32212331351458M270×6273＜206.72452621451558M295×6299＜226.42752871551658M320×6325＜246.22983121801908M350×6356＜2703303421952058M370×6377＜285.83503621902008M420×6

426＜325.939041222523586

M14×1.514＜81010.620253M24×224＜15.71819.128333M24×224＜15.719.520.428333M33×235＜22.8282930353M42×243＜30.43838.532405M52×2

57＜38485038465160

M65×268＜49.1616242505M80×383＜60.57576.250605M100×3102＜77.2949660705M125×4127＜96.811511875858M155×4159＜121.3146149901008M175×4

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说公务员考试ZH300-2009高压管、管件及紧固件标准(3)在线全文阅读。