A252 Qeb 2 Hlau Yeeb Nkab Rau Cov Hluav Taws Xob Hluav Taws Xob
Thaum nws los txog rau underground gas pipe installation, ib qho ntawm qhov tseem ceeb tshaj plaws yog qhov kev xaiv ntawm vuam txoj kev los txuas cov kav dej.Helical Submerged Arc Vuam(HSAW) yog cov txheej txheem vuam nrov siv los koom nrog A252 Qib 2 cov yeeb nkab steel hauv cov kav dej hauv av.Txoj kev no muaj ntau yam zoo, nrog rau kev siv vuam zoo, kev ua haujlwm zoo heev, thiab kev ntseeg tau ntev.
A252 Qib 2 steel yeeb nkabyog tsim tshwj xeeb rau kev siv hauv kev siv siab xws li thauj cov pa roj carbon monoxide.Cov kav dej no paub txog lawv lub zog tensile siab thiab corrosion kuj, ua rau lawv zoo tagnrho rau cov kav dej hauv av.Txawm li cas los xij, cov txheej txheem vuam yog ib qho tseem ceeb los xyuas kom meej tag nrho cov kev ncaj ncees thiab lub neej ntev ntawm cov kav dej ntuj.
Mechanical Property
| Qib 1 | Qib 2 | Qib 3 | |
| Yield Point lossis yield zog, min, Mpa (PSI) | 205 (30 000) | 240 (35 000) | 310 (45 000) |
| Tensile zog, min, Mpa (PSI) | 345 (50 000) | 415 (60 000) | 455 (66 000) |
Kev tshuaj xyuas khoom
Cov hlau yuav tsum tsis pub ntau tshaj 0.050% phosphorous.
Permissible variations In Weights and Dimensions
Txhua qhov ntev ntawm cov yeeb nkab pawg yuav tsum tau hnyav nyias thiab nws qhov hnyav yuav tsum tsis txhob sib txawv ntau dua 15% tshaj lossis 5% raws li nws qhov hnyav, suav nrog nws qhov ntev thiab nws qhov hnyav ntawm ib chav tsev ntev.
Sab nraud txoj kab uas hla yuav tsum tsis txhob sib txawv ntau tshaj ± 1% ntawm lub npe nominal sab nraud txoj kab uas hla
Phab ntsa thickness ntawm txhua qhov chaw yuav tsum tsis pub ntau tshaj 12.5% raws li cov phab ntsa thickness
Ntev
Ib qho random ntev: 16 txog 25ft (4.88 txog 7.62m)
Ob chav random ntev: tshaj 25ft txog 35ft (7.62 txog 10.67m)
Uniform lengths: permissible variation ± 1in
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kauv submerged arc vuam yog nws cov vuam zoo.Txoj kev no ua rau muaj kev tso nyiaj ntau, ua rau kev sib txuas sai dua thiab muaj txiaj ntsig ntau ntxiv.Yog li ntawd, installation ntawmcov kav dej hauv avtuaj yeem ua tiav raws sijhawm raws sijhawm, txo qis kev cuam tshuam thiab poob sijhawm.
Tsis tas li ntawd, HSAW muaj kev ua haujlwm zoo heev.Cov txheej txheem vuam tsim kom muaj kev sib raug zoo thiab txuas ntxiv ntawm A252 Qib 2 steel kav, kom ntseeg tau tias cov kav dej tuaj yeem tiv taus cov kev kub ntxhov sab nraud thiab ib puag ncig ib puag ncig hauv av.Qhov kev ncaj ncees ntawm cov qauv no yog qhov tseem ceeb rau kev nyab xeeb thiab kev ntseeg siab thauj cov pa roj carbon monoxide mus ntev.
Ntxiv nrog rau kev ua tau zoo thiab kev ua haujlwm ruaj khov, kauv submerged arc vuam muab kev ntseeg tau ntev.Welded pob qij txha tsim siv cov thev naus laus zis no tshwj xeeb rau kev ua haujlwm ntev thiab kev tiv thaiv corrosion, kom ntseeg tau tias cov kav dej hauv av nyob twj ywm hauv qhov kev pom zoo rau lub sijhawm ntev.Qhov kev ua neej ntev no yog qhov tseem ceeb rau kev txo qis kev saib xyuas thiab kho cov nqi cuam tshuam nrog cov kav dej ntuj.
Zuag qhia tag nrho, kev xaiv ntawm txoj kev vuam rau kev koom nrog A252 Qib 2 steel kav hauv cov kav dej hauv av hauv av tau ua lub luag haujlwm tseem ceeb hauv kev nyab xeeb thiab kev ua tau zoo ntawm cov pa xa hluav taws xob.Kauv submerged arc vuam muaj qhov zoo ntawm kev siv vuam, kev ua haujlwm ruaj khov thiab kev ntseeg tau ntev, ua rau nws zoo tagnrho rau kev ua kom muaj kev ncaj ncees ntawm cov kav dej hauv av.
Nyob rau hauv cov ntsiab lus, qhov tseem ceeb ntawm A252 Qib 2 steel yeeb nkab kauv submerged arc vuam nyob rau hauv underground gas pipeline installation tsis tau underestimated.Txoj kev vuam no muaj ntau yam zoo, nrog rau kev siv vuam zoo, kev ua haujlwm zoo heev, thiab kev ntseeg tau ntev.Los ntawm kev xaiv HSAW welded A252 Qib 2 steel yeeb nkab, cov kav dej xa hluav taws xob tuaj yeem ua kom muaj kev nyab xeeb thiab txhim khu kev qha kev thauj mus los rau xyoo tom ntej.
