ASTM A312 rau seamless (sms) thiab welded ustenitic stainless hlau yeeb nkab tshwj xeeb yog rau high- kub thiab cov kev pab cuam corrosive. Ntawm cov qhab nia nrov tshaj plaws tau teev tseg hauv A312, Qib 304L (undom s9403 / en 1.4307) sawv raws li qhov qis- carbon variant ntawm alloy 304; Nws cov ntsiab lus tseem ceeb yog qhov zoo dua rau cov rhiab thiab kev txhim kho corrosion.
ATM A UK 312 1.4307 304 l s smls cov kab ntsig nqe
Tus nqi tiag tiagATM A 312 304 l seamless yeeb nkabyog xam tau siv cov mis uas suav nrog cov khoom siv ua hauv paus ntawm cov nqe, tus lej sib luag, cov nqi tsim khoom, thiab cov khoom siv hluav taws xob.
Cov lus hauv no qhia txog tus nqi li nqi ib phaus rau ntau qhov sib.
|
Yeeb nkab nominal loj (NB) |
Sab Nraum Incha (OD) |
Raug sij hawm |
Kev tsim khoom nyuaj nyuaj |
Hypothetical ex - Zeb nqe ntsuas (USD / KG) |
|
Me Bore |
1/2 'rau 1' ' |
Sch 40 - Sce 80 |
Siab (Precision Txias Dracuction) |
6.50 - 9.00 |
|
Nruab nrab bore |
2 '' rau 8 '' |
Sch 10 -} sch 40 |
Nruab Nrab (Txheem Mill khiav) |
5.50 - 7.50 |
|
Loj Bore |
10 '' rau 16 '' |
Sch 10 -} sch 40 |
Siab (Tshwj Xeeb Dov / Tho) |
6.00 - 8.50 |
Cov hauv qab no yog qhov tseem ceeb rau tus nqi ntawm Astm 312 1.4307 304 l seamless yeeb nkab.
Cov khoom siv Raw (npib tsib xee thiab chromium)
Tus nqi ntawm ib qho stainless hlau, suav nrog 304L, yog khi rau tus nqi ntawm nws thawj qhov muaj. Qeb 304L yog chromium-}}}} cov ntsiab lus uas ib txwm muaj txij li 8.0% mus rau 12.0% thiab chromium los ntawm 18.0%.
1. Npib Volatility thiab LME Performance Index
Nickel yog ib qho kev sib txawv tshaj plaws thiab muaj feem cuam tshuam hauv tus nqi qauv ntawm 304L yeeb nkab. Cov nqi yog cov roj teeb hnyav tiv thaiv London hlau pauv music index.
Txhua txoj haujlwm tseem ceeb hauv LME tus nqi txhais yuav luag tam sim ntawd, tus nqi ib hlis lossis peb hlis lossis peb hlis lossis peb lub hlis lossis peb hlis lossis peb lub hlis lossis peb hlis lossis peb lub hlis twg rau lub hauv paus nqe ntawm cov hlau.
Qhov kev them se no feem ntau yog ib feem ntawm cov lab tus nqi, ua rau Nickel nqe saib xyuas qhov tseem ceeb rau kev kwv yees raug.
2. Ferro - chrome thiab ua lag luam ruaj khov
Thaum tsis tshua muaj ntxhiab dua li npib tsib xee, chromium, muab tau ntawm ferrocrome, kuj cuam tshuam tus nqi.
Cov nqi tsim tau: Seamless vs. Welded
ATM A {312 304 l seamless yeeb nkab yog tus nqi siab dua istm A312L Welded.
Qhov kev sib txawv ntawm cov txheej txheem ncaj qha los ntawm cov txheej txheem tsim khoom:
Seamless cov yeeb nkab yog tsim los ntawm kub - extruding los yog ua kom tiav cov khoom txias lossis ua kom tiav qhov xav tau ntawm lub taub thiab phab ntsa thickness.
Cov txheej txheem no yuav tsum loj heev, cov tshuab ua kom muaj zog, thiab cov kev ntsuas hluav taws xob tseem ceeb los xyuas kom ntseeg tau tias yog cov khoom tsis zoo ntawm Weld.
Cov yeeb nkab resulting muaj cov txheej txheem zoo tshaj plaws, cov khoom siv tsis sib xws ntawm txoj kev ncig saib welded rau kev siv cuav.
Txoj kev ua tsis tau yog muaj cov txiaj ntsig qis dua piv rau Vuam thiab Rolling Sawb Hlau. Qhov tsis xws luag nyob rau hauv qhov tho lossis cov nplooj ntoo kos duab tuaj yeem ua rau cov tuab neeg ua siab tawv, tshwj xeeb yog {{- txoj hauj lwm uas hla hla.
Cov kev tsim khoom lag luam no tau ua rau tus nqi kawg, ua rau tus nqi siab dua ib phaus lossis ib meter ntawm cov yeeb nkab smlram.
Cov yeeb nkab cov yeeb yam: Teem sijhawm, cov kab uas hla, thiab ntev
Qhov tshwj xeeb tshaj plaws dictated los ntawm kev txiav txim yuav tau cuam tshuam ntau dua tus nqi ntawm ASTM A {{0 l yeeb nkab.
1. Teem Caij (Phab Ntsa Thickness)
Cov tsheb kauj ruam yog tus nqi ncaj qha rau ntau ntau, raws li nws txiav txim siab qhov loj ntawm cov khoom siv ntev. Cov sijhawm ua haujlwm siab dua tsis tsuas yog cov khoom siv hnyav tab sis tuaj yeem ua tau ntau cov kauj ruam tsim kev tsim khoom, yog li nce lub sijhawm ua thiab nqi. Heev txawv txawv lossis tsis- Cov rooj tsav xwm txheem feem ntau ua rau lub moq lossis ib qho siab dua ib-}} tsev tus nqi.
2. Cov taub uas nyob sab nraud thiab cov nqi loj
Cov yeeb nkab od plays yog lub luag haujlwm tseem ceeb. Cov kab laum me me me me thiab txoj kab uas hla ntau ob leeg nyiam tus nqi them tus nqi.
Tsis muaj cov khoom siv txias tshwj xeeb, thaum loj}}}}} piercers yuav tsum muaj zog, cov kav dej tshwj xeeb thiab dov thiab dov mills.
Tus nqi qis tshaj plaws yog feem ntau pom nyob rau hauv lub nruab nrab, siab {{} eg, 4 'nb) qhov twg zeb muaj txiaj ntsig tau ua kom tiav.
3. Ntev yuav tsum tau
Txheem seamless yeeb nkab feem ntau yog muag hauv srl lossis drl. Yuav tsum muaj qhov tseeb, meej txiav qhov ntev ntxiv cov kauj ruam fab thiab cov txiaj ntsig hauv cov khoom siv uas yuav los ntawm tus neeg yuav khoom los ntawm kev txiav hwm.
Kev ntseeg zoo thiab kev pov thawj
1. Ob daim ntawv pov thawj dua thiab PMI kuaj
304L yeeb nkab feem ntau yog dua me ntsis-} Tau lees paub tias yog AQUM A312L / ASME SA312 TORP312. Cov nqi ua tiav suav nrog kev sim siab, xws li transverse thiab kev xeem ntev ntev, farthening / flaring kev xeem, thiab ndt.
Tsis tas li ntawd, kev thov kom paub tseeb tias cov ntaub ntawv ntsuas PMI, lossis Charpanular Corrosion, lossis Charpy Kev Ntsuam Xyuas Kev Pab Cryogenic ntxiv cov nqi sib ntxiv.
Tus nqi ntawm tag nrho cov khoom ntawv pov thawj yog ib txwm siab dua li ntawm tsis -}}}}}} Daim ntawv pov thawj steel.
2. Keeb kwm thiab zeb lub koob npe nrov
Lub teb chaws ntawm keeb kwm thiab lub koob npe nrov ntawm kev tsim cov txiv neej tseem ceeb cuam tshuam tus nqi. Cov mills hwm paub txog xyoo lawm ntawm kev ua tau zoo ib yam thiab ua raws li cov qauv nruj feem ntau ua rau tus nqi siab dua.
Hloov siab, cov khoom siv tsis muaj cov khoom siv tsawg dua tuaj yeem muab cov nqi qis dua uas tsis muaj nqi
Tiam sis kev ua lag luam thiab cov khoom siv cov saw hlau
1. Ntiaj teb muaj peev xwm thiab cov sij hawm ua
Thaum tau thov khoom seem, cov thawj coj ua tau nce ntxiv, thiab cov tuam ntxhab tuaj yeem tswj cov nqi siab dua.
Tsis tas li ntawd, cov qib cov khoom lag luam muaj los ntawm cov neeg faib khoom ua si ib lub luag haujlwm buffering; Tus neeg faib khoom tsawg txhais tau tias cov neeg yuav khoom raug yuam kom them tus nqi them rau kev xa khoom tam sim lossis txais lub sijhawm ntev nqa ntev.
2. Logistics thiab rau cov kev cuam tshuam
Cov nqi thauj khoom thauj tau dhau los ua cov neeg muaj zog zuj zus thiab yuav tsum tau ua rau tus nqi xa khoom kawg.
Tsis tas li ntawd, xws li cov cai ua lag luam tawm, xws li anti - Cov teb chaws muaj los ntawm kev lag luam stip, qee zaum ntxiv 15% rau 50% rau tus nqi ntawm cov ntaub ntawv txawv teb chaws.
Nkag siab cov yam yuav pab cov neeg yuav khoom rau cov neeg yuav khoom los sib tham, kom lawv muaj kev ruaj ntseg ntawm cov yeeb nkab ntawm tus nqi tsim nyog.
