Nyob rau hauv cov hnub qub, rau Gas Pipe nws zoo dua los sivCov yeeb nkab dubQhov no feem ntau yog vim qhov tsis zoo ntawm kev galvanizing.Niaj hnub noyeeb nkab galvanizedtsis raug txwv tsis pub siv rau roj av lawm.Qhov kev tawg ntawm cov galvanizing hauv cov yeeb nkab yog tshwm sim los ntawm lwm cov pa roj xws li cov pa roj thee uas yog "cov pa roj tsim tawm" tsis yog ntuj. "Cov yeeb nkab hlau yuav tsum yog Schedule 40 lossis hnyav dua, yuav tsum ua raws li ib qho ntawm cov qauv teev tseg thiab tuaj yeem yog hlau dub lossis galvanized. Tsis zoo li kev ntseeg nrov, cov pa roj ntuj tsis cuam tshuam tsis zoo nrog cov txheej zinc ntawm cov yeeb nkab galvanized". Cov lus zoo sib xws kuj siv rau hauv tsab xyoo 2006 hauv Code thiab Lus Qhia ntawm IFGC (International Fuel Gas Code). Cov kws kho dej feem ntau siv cov yeeb nkab dub nrog roj rau ob qho laj thawj tseem ceeb. Ib qho yog tias nws pheej yig dua li galvanized. Qhov thib ob yog tias yog cov yeeb nkab galvanized siv rau dej ces siv dub rau roj sib txawv ob qho kev siv. Ib qho lus qhia zoo yog tias khiav cov yeeb nkab hlau dub rau roj rau sab nraud ntawm lub tsev yog pleev xim daj kom tiv thaiv cov kab xeb. Nws nyob ntawm qhov project tsim kho.
Qhov Sib Txawv Ntawm Cov Yeeb Nkab Dub & Cov Yeeb Nkab Galvanized
Dej thiab roj av xav tau cov kav dej los muab hluav taws xob rau cov tsev nyob thiab cov lag luam. Roj av muab hluav taws xob rau cov qhov cub, cov cua sov dej, cov cub tawg thiab lwm yam khoom siv. Dej yog qhov tseem ceeb thiab pom tseeb. Ob hom yeeb nkab hlau feem ntau siv los nqa dej thiab roj av yog yeeb nkab dub thiab yeeb nkab galvanized. Yog li, qhov txawv ntawm yeeb nkab dub & yeeb nkab galvanized yog dab tsi.
* Cov Kav Hlau Galvanized
Cov yeeb nkab hlau galvanized yog npog nrog cov khoom siv zinc kom ua rau cov yeeb nkab hlau tiv taus xeb. Kev siv tseem ceeb ntawm cov yeeb nkab galvanized yog los muab dej. Cov zinc kuj tseem tiv thaiv kev sib sau ua ke ntawm cov minerals uas tuaj yeem txhaws cov kav dej.
* Cov Kav Hlau Dub
Cov yeeb nkab hlau dub txawv ntawm cov yeeb nkab galvanized vim nws tsis tau coated. Cov xim tsaus ntuj los ntawm cov hlau-oxide tsim rau ntawm nws qhov chaw thaum lub sijhawm tsim khoom. Lub hom phiaj tseem ceeb ntawm cov yeeb nkab hlau dub yog nqa cov roj av mus rau hauv tsev thiab cov lag luam. Cov yeeb nkab dub seamless yog tsim tsis muaj seam, ua rau nws yog cov yeeb nkab muaj zog thiab muaj kev nyab xeeb dua los nqa cov roj. Cov yeeb nkab hlau dub welded kuj tseem siv rau cov tshuab tua hluav taws.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-27-2024