Q1: Dab tsi yog cov neeg tsim tawm tseem ceeb ASTM A53 steel yeeb nkab hauv ntiaj teb?
Suav teb yog lub ntiaj teb cov neeg tsim khoom loj tshaj plaws ntawm A53 cov yeeb nkab steel, suav rau ntau tshaj 50% ntawm cov khoom siv thoob ntiaj teb. Cov khoom lag luam loj xws li Tianjin yeeb nkab, baosteel, thiab lwm yam raws li cov steel hlau) thiab sab qab teb steel) kuj tseem ceeb tshaj plaws cov nqi export nrog tus nqi export nrog tus nqi export. Cov neeg tsim khoom Asmeskas Asmeskas (xws li nucor) tsom rau kev ua lag luam siab, tab sis tus nqi yog qhov siab. Cov kav hlau steel los ntawm Middle East (xws li Saudi Arabia) feem ntau yog siv hauv cov roj av thiab ntsib tus qauv API 5L. Thaum kev yuav khoom, nws yog ib qho tsim nyog los them sai sai rau qhov sib txawv hauv cov qauv hauv txawv teb chaws (xws li GB / T 8163 VS ASTM A53).
Q2: Cov yam ntxwv tseem ceeb cuam tshuam rau tus nqi ntawm ASTM A53 cov yeeb nkab steel?
Tus Nqi Cov Khoom Siv Ntawm Cov Khoom Siv Raw (Kub-Rolled Coils) Ncaj Ncees Tus Nqi Ntawm Cov Kav Hlau, Nyiaj Txiag Rau 60% -70% ntawm cov muag khoom. Ua cov txheej txheem xws li galvanizing, txheej los yog kev kho cua sov yuav ntxiv 20% ntxiv rau tus nqi. Cov nqi tsheb thauj mus los (tshwj xeeb thoob ntiaj teb kev xa khoom) muaj qhov cuam tshuam tseem ceeb ntawm cov lus kawg. Kev lag luam khoom lag luam thiab kev thov (xws li cov peev txheej hauv tsev loj hlob) yuav thawb tus nqi hauv lub sijhawm luv luv. Cov kev yuav khoom tuaj (xws li ntau tshaj 100 tons) feem ntau tau txais ib qho 5% -10% luv nqi.
Q3: Cov neeg siv khoom lag luam twg yog cov neeg siv tseem ceeb ntawm ASTM A53 kav hlau?
Kev lag luam kev tsim kho (scaffolding, kev pab txhawb, kev siv tau txog 40% ntawm A53 cov kav hlau, tshwj xeeb tshaj yog hauv kev lag luam tawm. Cov roj thiab roj kev lag luam siv nws rau cov roj hluav taws xob qis dua kis pipelines thiab casings cov phiajings rau 25% ntawm kev thov. Kev ua liaj ua teb iRrrigation tshuab xum txais galvanized A53 kav dej vim yog lawv cov huab cua tsis kam thiab tus nqi tsawg. Cov kev tsim khoom lag luam kev lag luam siv cov kav dej seamless kom ua cov txheej txheem shaft, hydraulic kheej kheej kheej thiab lwm yam. Kev siv hauv nroog Engineering (dej so, tso dej) yog qhov ruaj khov ntawm kev thov, tshwj xeeb tshaj yog galvanized kav dej.
Q4: Dab tsi yog cov nquag hloov cov astm ATM A53 Cov Kav Hlau?
ASTM A106 kav hlau yog tsim nyog rau qhov kub thiab kub lub sijhawm, tab sis tus nqi yog 20% -30% siab dua. API 5L Pipeline Hlau (xws li X42-X70) muaj zog thiab yog siv rau cov roj ntev thiab roj av. Stainless hlau (304/316) yog corrosion-resistant tab sis cov nqi 3-5 zaug ntau tshaj A53. PVC lossis HDPE yas roj hmab maj mam hloov A53 hauv kev tso dej ntawm cov dej tsis muaj siab, tab sis lawv muaj qhov kub tsis kam. Aluminium kav yog lub teeb ci thiab corrosion-resistant, tab sis tsis muaj lub zog thiab feem ntau siv rau kev kho kom zoo nkauj lossis lub teeb txheej txheem.
Q5: Kuv yuav ua li cas thiaj li kuv yuav tau them nyiaj rau thaum yuav aun
Paub meej tias tus neeg muab khoom siv zeb xeem (MTC) kom ua raws li ASTM cov qauv. Kuaj seb cov npoo ntawm cov yeeb nkab steel muaj cov kab nrib pleb, nti lossis xeb, tshwj xeeb yog qhov zoo tshaj plaws ntawm welds. Txheeb xyuas seb puas kam rau siab ntev (xws li txheej txheej hla ± 1%, phab ntsa thickness ± 12.5%) raws li tus qauv. Rau galvanized kav, zinc txheej tuab yuav tsum muaj ntau dua los yog sib npaug rau 85μm (600 g / m²). Thov kev sim thib peb (xws li SGS) tuaj yeem zam kev txaus ntshai zoo, tshwj xeeb tshaj yog thaum yuav khoom hauv ntau.
