Galvanized steel kav tau muab faib ua cov kav dej txias galvanized thiab kub-dip galvanized steel kav. Cov kav dej txias galvanized steel tau raug cuam tshuam, thiab tom kawg kuj tau txhawb nqa los ntawm lub xeev siv ib ntus. Hauv xyoo 1960 thiab 1970s, cov kav dej tsim tau pib tsim cov kav dej tshiab thoob ntiaj teb, thiab cov kav dej galvanized raug txwv. Plaub lub luag haujlwm thiab cov haujlwm xws li Ministry of Construction ntawm Tuam Tshoj kuj tau ua cov khoom kom meej meej rau cov yeeb nkab galvanized galvanized ua cov kav dej los ntawm 2000. Cov kav dej txias hauv cov zej zog tshiab tsis tshua siv cov kav dej galvanized. Cov kav dej kub hauv qee cov zej zog siv cov kav dej galvanized. Kub-dip galvanized steel kav yog siv dav hauv hluav taws xob, hluav taws xob thiab kev loj.
Qhov hnyav coefficient ntawm galvanized steel yeeb nkab
Nominal phab ntsa thickness (MM): 2.0, 2.5, 2.8, 3.2, 3.5, 3.8, 4.0, 4.5.
Coefficient tsis muaj (C): 1.064, 1.051, 1.045, 1.040, 1.036, 1.034, 1.032, 1.028.
Lus Cim: Cov khoom siv hlau hlau yog cov cim tseem ceeb los xyuas kom meej qhov kev ua tau zoo kawg (kev ua haujlwm zoo) ntawm cov hlau. Nws nyob ntawm cov tshuaj muaj pes tsawg leeg thiab thermal kho system ntawm steel. Nyob rau hauv cov txheej txheem steel yeeb nkab, raws li kev siv sib txawv, kev ua haujlwm ncab (lub zog tensile, yield zog lossis yield point, elongation point) thiab hardness, toughness indicators, thiab high thiab low temperature yuav tsum tau los ntawm cov neeg siv.
Hlau tooj: Q215A; Q215B; qw 235a;. q235 ib.
Ntsuas tus nqi /MPA:D10.2-168.3mm yog 3MPa; D177.8-323.9mm yog 5MPa
Kev xav tau rau cov kav hlau galvanized
1. Hom tshuaj thiab cov khoom xyaw tshuaj
Daim hlau thiab cov khoom siv tshuaj lom neeg ntawm cov kav hlau galvanized yuav tsum ua tau raws li daim npav thiab cov khoom siv tshuaj lom neeg ntawm cov yeeb nkab dub uas tau teev tseg hauv GB / T3091.
2. Txoj kev tsim khoom
Txoj kev tsim khoom (qhov cub vuam lossis vuam) ntawm cov raj dub yog xaiv los ntawm cov chaw tsim khoom. Galvanizing siv kub-soaking galvanized txoj kev.
3. Xov thiab yeeb nkab sib txuas
(A) Galvanized steel kav nrog threaded xa khoom yuav tsum tau nqa tawm tom qab galvanized. Cov xov yuav tsum ua raws li cov cai ntawm YB 822.
(B) Cov yeeb nkab steel yuav tsum ua raws li cov cai ntawm YB 238; forged cam khwb cia hlau yeeb nkab txuas yuav tsum ua raws li cov kev cai ntawm YB 230.
4. Mechanical kev ua tau zoo Cov khoom siv kho tshuab ua ntej galvanized steel kav yuav tsum ua raws li cov cai ntawm GB 3091.
5. Lub uniformity ntawm galvanized txheej Lub galvanized steel yeeb nkab yuav tsum tau sim ntawm uniformity ntawm galvanized txheej. Cov yeeb nkab steel qauv yog impregnated nrog tooj liab sulfate daws rau 5 zaug sib law liag thiab tsis tuaj yeem ua liab (tooj liab-plated).
6. Galvanized steel kav nrog kev ntsuas txias dabtsi yog khoov nrog lub caliber tsis siab tshaj 50mm yuav tsum tau siv rau kev ntsuas txias dabtsi yog khoov. Lub kaum sab xis yog 90 degree, thiab qhov nkhaus nkhaus yog 8 npaug ntawm txoj kab uas hla. Yog tias tsis ua tiav thaum lub sijhawm kuaj, tus qauv weld yuav tsum nyob rau sab nraud lossis sab saud ntawm qhov kev taw qhia nkhaus. Tom qab kev sim, yuav tsum tsis txhob muaj cov kab nrib pleb thiab zinc txheej ntawm cov qauv.
7. Kev ntsuas hydraulic hydraulic yuav tsum tau ua nyob rau hauv lub raj dub, thiab lub vortex kuj tseem siv tau los ntawm kev ntsuas hydraulic. Kev ntsuas siab lossis vortex nrhiav kom pom qhov sib piv piv txwv loj yuav tsum ua raws li cov kev cai ntawm GB 3092. Steel mechanical kev ua tau zoo yog ib qho tseem ceeb ntawm kev ua kom ntseeg tau qhov kev ua tau zoo kawg (kev ua haujlwm zoo) ntawm cov hlau.
