亚博网页登陆

亞博網頁登陸

亞博網頁登陸閥門

亞博網頁登陸

zhaiyao:jieshaoleyizhongpingjiaquanhanjiefatiguanxianqiufahanjiejietouanquanxingdefangfa,genjuhanjiejietouduanlierendu ctod shiyanzhi,duimaihuhanhanjiejietoumianhanhourechulidekenengxingjinxinganquanpingding。weidaxingquanhanjiefatiguanxianqiufazhizaotigongkexueyiju。

關鏈詞全焊接閥休管線球閥焊接接頭免焊后熱處理裂紋尖端張開位移(CTOD)

一、前言

石油、天然氣輸送管道是一條能源供給線,線上的緊急切斷閥為全焊接閥體管線球閥,要求 30 年以上的無維護使用壽命。但服役條件卻十分惡劣:從北極圈到赤道,從高原到海底,從沙漠到荒原;其間穿過地震帶、沼澤地、凍土層、江河、湖泊和山坡;有架設的,有直埋地下的;在野外,無人操作,維護困難.既承受管道內部壓力,又承受外部載荷,如地基沉降、泥石流和地震,管道溫度應力以及地下水的電位腐蝕、應力腐蝕。

quanhanjiefatidehanjiejietouyibanjunshejiweizhaijianxihoubimaihuhan,liru class600,20in deqiufa,hanjiebihouwei 44mm,c1ass900,48in deqiufa,hanjiebihouwei 140mm。weichaodahoudutongzhuanghanjiejietou。houbiduocenghanjieguochengshijinshucailiaoduocifanfujiarehelengquedeguocheng,daozhihanjiejietouzuzhidebujunyunxingheliezhihua,chanshengjiaogaodecanliuyingli,shenzhichanshenghanjiequexian。hanjieyoushigaichanpinzuzhuanghoudezuihouyidaogongxu,faqiangneiyoufeijinshumifengcailiaoxiangjiaohejusifuyixisuliao,bunengjinxinghanhourechuli。

lingwai,zaifatihanjiejietoushejizhong,weiduizhunhedingwei,zaihanfenggenbucunzaiyitiaohuanxingdezhuangpeixifeng,zheyixifengzaineibuyalihewaibuhezaizuoyongxia,jiangchanshengjibeiganzhengchanggongzuoyinglideyinglijizhong,tongyangshigongchengshimennanyuchuli。

因此,閥體焊接接頭的根部縫隙的應力集中,殘留應力,組織劣質化成為閥體結構中的薄弱環節,為國內外閥門界關注,但又未見有任何解決這一問題的相關報道,成為這個產品結構邊界完整性的一個隱患。

jumeiguo 20 shiji 90 niandaidetongji,hanjiejietoushixiaoeryinqijingjisunshidadaoguominjingjide 5%。zaidaliangdeduijinshucailiaohanjiejiegoushixiaoshiguzhong,qifenxijieguobiaoming,dabufenhanjiejietoushixiaoshijinshucailiaorenxingbuzuzaochengde。jietouzhongjinshucailiaozaihanjieguochengzhongkuaisuronghuayoukuaisuninggu,shoudaozhoubianjinshuyueshulidezuoyongchanshengjiaodadecanliuyingli,erjinshucailiaoyouduocifanfujinglironghua—ninggudexiangbianguocheng,xingchengcudadezhuzhuangjingli,bingchanshengxichu、jiaza、qikongheweiliewendengquexian,shicailiaodechuxingmingxianjiangdi。youganshigudefuzaxing,yuyanmouyijiegouyinmouzhongyuanyinshixiaoshikunnande,dancongtongjixuejiaoduyan,dabufenhanjiejiegoudepohuaishiyougancailiaoderenxingbuzu,youweixiaodequexianyinfapilaoliewen,bingbuduankuozhanzaochengde。

youyuhanhoujinshucailiaodebujunyunxing,liezhihuahequexian,cailiaoxuezhongdesangejibenjiashe;lianxuxingjiashe、junyunxingjiashehegexiangtongxingjiasheyibumanzu,zhejiuxuyaoyingyongduanlielixuedelilun。duanlielixuederenwujiushiconggoujianzhongcunzaihongguandeweiliewendeshishichufa,yongxiandanxingduanlielixuehedansuxingduanlielixuedefenxifangfalaijiejuegoujiandeliewenwenti。jibagoujianzhongliewendaxiao、gongzuoyinglihecailiaodikangliewendenengli(jiliewenjianduanzhangkaiweiyi ctod duanlierenduzhi)dingliangdilianxiqilai,duihanyouweiliewendegoujianhezuzhiliezhihuadejietou,jinxinganquanxingheshoumingshiyanfenxiyupinggu。

斷裂力學學科的發展,已定義一種“裂紋尖端張開位移值”(Crack Tip opening Displacement,CTOD),它能準確地評估焊接接頭的韌性。1991 年,英國焊接研究所提出標準 BS7448 Part1,給出了金屬材料的臨界 CTOD、J 積分和 KIC 的試驗方法。1997 年,又提出該標誰的第二部分 BS7448 Part Ⅱ《確定焊縫金屬材料 KIC,臨界 CTOD 和 J 積分的方法》,針對焊接接頭中各區域性能不均勻性和存在殘留應力等特征,對 BS7448 Part1 進行了補充規定,這就是目前國際上被工程界普遍認可的,測定焊接接頭 CTOD 斷裂韌度值的試驗標準。

suihou,2000 nianyingguobiaozhunjufabiao bs7910-1999《jinshujiegouzhongquexianyanshoupingdingfangfadaoze》,tacaiyongjiyuduanlielixueyuanlideshixiaopingdingtu(fad)laijinxingpingdingjinshujiegouzhongdequexian。meiguoshiyouxuehuigenju bs7448 part ⅱ deshiyanfangfa,zai api 1104《guandaohanjieyuxiangguansheshi》debiaoshuizhongzengjialefulu a,tichuguandaohanjiejietou ctod zhideyanshoubiaoshui。nuoweichuanjishe dnv-os-401 zaigongchengxiangmudeyanshoupingguzhongyidui ctod zhitichuyigepingguyanshoubiaozhun,yibianduidaxingjiegoujianjinxinghanhoumianrechulijinxinggongchengpinggu。ctod zhishijishangshiyuhanjiemucai、hansi、hanji、hanjiegongyi、hanjiefangfa、hanfengjiegouchicunhehoududengyinsuyouguan,shiyigecailiaodikangliewennenglidezonghecanshuhexingnengzhibiao。

guoneiyiyoudalianghanjiegongzuozheyingyong ctod duanlierendushiyanpingdinghanfenganquanxing。haiyangshiyougongchenggufenyouxiangongsizaihaiyangshiyoupingtaijianzaozhong,yingyong ctod duanlierendushiyanpingjiahanfengdediwenduanlierendu,shiyanjieguobiaoming,weijinghanhourechulide eh36 ganghantiaodianhuhan、dansimaihuhanheshuangsimaihuhandesanzhonghanjiegongyihanjiejietouhereyingxiangqu,diwenxiajuedabufenshiyangdeduanlierenduzhishihegede,pingjiahanjiejietoukeyizaibujinxinghanhourechulideqingkuangxiashiyong,suoduanhaiyangpingtaijiegoudezhizaozhouqi,jiangdizhizaochengben,zhenggeshiyangongzuodedaomeiguo philips shiyougongsihe dnv nuoweichuanjishedehaoping。

tianjindaxueanzhaoouzhougongtongtijiegouwanzhengxingdepingdingfangfa(sinap)deyaoqiu,yingyong ctod shiyanfangfa,duihaidiyouqiguandaoanquanxingjinxingpinggu,genjushiyanjieguozuochukendingjielun。

wuhanligongdaxuehezhongguochuanjishetongguo ctod zhi,pingdingcongerzhongbutongdewureshixiaochulidehanjiegongyizhongquedingchuzuijiahanjiegongyi。

tianjindaxuegenju ctod(liewenjianduanzhangkaiweiyi)shiyanjieguo,xianhoucaiyongyingguobiaozhunxiehuitichude bs7910 biaozhunheougongtitichudejiegouwanzhengxingpingdingfangfa sintap,zhendui eh36 guanxianganghanjiejietouhanzhichudebiaomianliewenjinxingpingding。

qinghuadaxueduichangyongqiaolianggang q370qe he q345qd gangjinxing ctod shiyan,fenbiejisuancailiaozaicuiduan、rencuipohuaiherenxingpohuaishide ctod zhi,zuoweixiudingchangguichongjirendubiaozhundeyiju。

qinghuadaxuetongligehezhongguoshiyoutianranqiguandaokexueyanjiuyuanbaishiwu、liufangneng,jianliyucegaoqiangduguanxiangang(x70)hanjiejietouxingnengcanshuliewenjianduanzhangkaiweiyi(ctod)de bp shenjingwangluomoxing,weihanjiegongyicanshuyouhuatigongyouxiaoshouduan。

yi class600,20in quanhanjiefatiguanxianqiufa 44mm houyuantongzhuangfatihanjiejietouweili,genju api 1104 fulu a he dnv-os-401 debiaohuaihe ctod deshiyanjieguo,pingdinggaimaihuhanhanjiejietoujubeikemianhanhourechulidetiaojianshichongfende。

(全文未完,請看下一篇《全焊接閥體管線球閥焊接接頭安全評估(影響閥體焊縫安全性的因素)》)


本文地址:http://zapped-it.net/tech/qf/396.html


下一篇:全焊接閥體管線球閥焊接接頭安全評估(影響閥體焊縫安全性的因素)
上一篇:長輸管線全焊接球閥焊接工藝慨述


免責聲明
  • 本網站致力于提供正確、完整的技術資料,但不保證信息的正確性和完整性,且不對因信息的不正確或遺漏導致的任何損失或損害承擔責任。
  • 本站所提供的技術文章,僅供參考,如自行使用本站資料發生偏差,本站概不負責,亦不負任何法律責任。
  • 本站所提供的技術文章,部分內容來源為網絡,作者不知,如有侵權請聯系刪除。
  • 如需技術支持,請致電我公司技術與銷售咨詢熱線:021-66059666。

火狐体育 环球体育 英亚体育 亚博网站登陆 立博app