1. Q: Dab tsi yog "Galvanized" carbon steel yeeb nkab, thiab nws lub ntsiab kom zoo dua yog dab tsi?
A:Galvanized yeeb nkab yog carbon steel yeeb nkab uas tau coated nrog ib txheej ntawm zinc. Cov txheej txheem no, hu ua galvanization, muab kev tiv thaiv kev tiv thaiv uas ua rau kom cov yeeb nkab tiv thaiv corrosion thiab xeb. Nws yog feem ntau siv rau kev siv sab nraum zoov, cov kav dej, thiab hauv qhov chaw corrosive.
2. Q: Qhov nominal loj npaum li cas ntawm cov yeeb nkab (piv txwv li, NPS 2") cuam tshuam rau nws txoj kab uas hla?
A:Rau NPS 12 "thiab me dua, Nominal Pipe Size (NPS) yogtsis yogqhov tseeb sab nraud txoj kab uas hla. Piv txwv li, NPS 2" yeeb nkab muaj ib txoj kab uas hla sab nraud ntawm 2.375 ntiv tes. Qhov no yog ib qho qub txeeg qub teg ntawm cov qauv kev tsim cov yeeb nkab.
3. Q: Lub hom phiaj ntawm "Hydrostatic Test" ntawm cov kav dej yog dab tsi?
A:Kev ntsuam xyuas hydrostatic yog qhov tsis yog -kev sim ua kom puas tsuaj qhov twg cov yeeb nkab tau ntim nrog dej thiab ua kom siab mus rau qib uas tau teev tseg (tseem ceeb dua li nws qhov ntsuas ua haujlwm siab) txhawm rau txheeb xyuas nws lub zog thiab xau- nruj. Nws yog ib qho kev xav tau rau feem ntau cov kav dej siab specifications.
4. Q: Dab tsi yog qhov kev txwv tseem ceeb ntawm carbon steel yeeb nkab piv rau stainless hlau?
A:Qhov tseem ceeb txwv yog nws cov tsis zoo corrosion kuj. Cov pa roj carbon steel yuav yooj yim xeb thaum raug ya raws thiab oxygen. Stainless hlau muaj chromium, uas tsim ib qho passive oxide txheej uas tiv thaiv nws los ntawm corrosion, ua rau nws haum rau ntau yam ntawm corrosive media thiab huv si daim ntaub ntawv.
5. Q: Hauv pipeline terminology, "Pickled thiab Oiled" yeeb nkab yog dab tsi?
A:"Pickled thiab Oiled" yog hais txog cov txheej txheem kho saum npoo. Cov yeeb nkab yog muab tso rau hauv cov kua qaub ("pickling") kom tshem tawm cov nplai thiab cov impurities, ua rau kom huv si, du nto. Tom qab ntawd nws yog coated nrog lub teeb roj los tiv thaiv xeb thaum lub sij hawm cia thiab kev thauj mus los ua ntej ntxiv fabrication los yog txheej. Qhov no yog ib txwm muaj rau cov kav dej uas yuav tsum tau muaj qhov siab - ua kom tiav qhov zoo.
