Schedule 80 Galvanized yeeb nkab yog dab tsi?
Teem caij 80 galvanized yeeb nkab yog hais txog ib hom steel yeeb nkab uas yog coated nrog ib txheej ntawm zinc los pab tiv thaiv corrosion. Lub npe "80-gauge" yog hais txog phab ntsa tuab ntawm cov yeeb nkab, nrog No. 80 yeeb nkab yog tuab thiab muaj peev xwm tiv taus siab dua li No. 40 yeeb nkab. Hom yeeb nkab no feem ntau yog siv rau hauv cov ntawv thov uas tiv thaiv corrosion thiab high-pressure ib puag ncig yog qhov tseem ceeb, xws li kev lag luam thiab kev lag luam.
Teem sijhawm 80 galvanized yeeb nkab tensile yuav tsum:
Tensile lub zog yuav tsum tau rau Schedule 80 galvanized yeeb nkab feem ntau txiav txim siab los ntawm cov qauv tshwj xeeb thiab cov qauv tsim los ntawm cov koom haum tswj hwm lossis cov koom haum kev lag luam. Cov kev xav tau no yuav txawv raws li cov yam ntxwv xws li cov yeeb nkab cov khoom muaj pes tsawg leeg, txheej txheem tsim khoom, thiab daim ntawv thov npaj. Nco ntsoov xa mus rau cov qauv tseem ceeb xws li ASTM (American Society for Testing and Materials) lossis lwm yam kev qhia tshwj xeeb los txiav txim siab lub zog tensile tiag tiag rau No. 80 galvanized yeeb nkab hauv koj cov ntaub ntawv tshwj xeeb.
Cov hauv qab no yog cov piv txwv ntawm qhov yuav tsum tau muaj zog tensile rau Gauge 80 galvanized yeeb nkab raws li cov qauv sib txawv:
ASTM A53: Tsawg tensile zog 48, 000 psi
ASTM A106: Tsawg tensile zog 60, 000 psi
API 5L: Tsawg kawg tensile lub zog sib txawv nyob ntawm seb cov qib tshwj xeeb ntawm cov hlau siv
Teem sijhawm 80 Galvanized Pipe Dimensions:
Teem sijhawm 80 galvanized yeeb nkab qhov ntau thiab tsawg yuav txawv nyob ntawm seb qhov loj me thiab cov qauv tshwj xeeb ua raws. Txawm li cas los xij, rau kev siv dav dav, ntawm no yog qee qhov ntau thiab tsawg rau 80 gauge galvanized steel yeeb nkab:
Nominal loj: 1/8 "mus rau 16".
Sab nraud txoj kab uas hla (OD): Nws txawv raws li nominal loj.
Phab ntsa Thickness: Feem ntau thicker dua No. 40 yeeb nkab, kev ntsuas nyob ntawm nominal loj thiab tus qauv.
Ntev: Tus qauv ntev yog feem ntau 21 ko taw mus rau 24 ko taw.
Teem sijhawm 80 Galvanized Yeeb Nkab Siab Ntsuas:
Kev ntsuas siab ntawm Schedule 80 galvanized yeeb nkab nyob ntawm ntau yam, suav nrog qhov loj me, qhov kub thiab txias, thiab cov qauv tshwj xeeb lossis cov cai ua raws. Raws li cov lus qhia dav dav, cov hauv qab no yog cov kev ntsuas siab rau Gauge 80 galvanized yeeb nkab ntawm chav tsev kub (70 degree F / 21 degree):
1/8 "rau 1": 690 psi
1 1/4" rau 2": 630 psi
2 1/2" rau 3": 550 psi
3 1/2" rau 4": 510 psi
5 "rau 6": 490 psi
8 "rau 10": 420 psi
12 "mus rau 14": 360 psi
16 nti: 280 phaus ib square inch
Yuav ua li cas Galvanize Teem caij 80 Pipe?
Galvanizing Schedule 80 yeeb nkab muaj cov txheej txheem hu ua kub-dip galvanizing, uas feem ntau yog siv los tiv thaiv hlau los ntawm corrosion. Nov yog cov kauj ruam dav dav rau galvanizing 80 gauge yeeb nkab:
(1) Kev kho deg
Ntxuav cov kav dej kom tshem tawm cov xeb, roj, lossis nplai uas yuav nyob ntawm qhov chaw. Qhov no feem ntau ua tiav los ntawm kev sib xyaw ua ke ntawm alkaline ntxuav, pickling thiab rinsing.
(2) Flux
Cov yeeb nkab ntxuav yog ces dipped rau hauv cov tshuaj flux los txhawb kev adhesion ntawm zinc txheej. Flux kuj tseem pab tshem tawm cov oxides seem ntawm cov hlau.
(3) Galvanized
Raus cov yeeb nkab npaj rau hauv da dej ntawm molten zinc ntawm qhov kub ntawm kwv yees li 840 degree F (449 degree ). Ua tib zoo tswj lub sijhawm so kom paub tseeb tias txheej txheej tuab.
(4) Kev tshuaj xyuas thiab quenching
Tom qab galvanizing, xyuas seb cov yeeb nkab puas sib npaug, thiab tom qab ntawd tua thiab txias hauv dej.
(5) Tom qab ua tiav
Yog tias xav tau, cov yeeb nkab galvanized tuaj yeem raug kho ntxiv xws li passivation lossis chromate hloov dua siab tshiab txheej los txhim kho cov khoom ntawm txheej galvanized.
