304 stainless hlau yeeb nkabyog cov qib engineers ncav cuag thaum lawv xav tau cov khoom tiv thaiv corrosion tsis muaj tus nqi ntawm 316. Taug kev los ntawm cov nroj tsuag tshuaj, chaw kho dej, lossis chaw tsim khoom lag luam, thiab koj yuav pom nws threaded, welded, lossis flanged rau hauv qhov chaw. HT PIPE is aastm a269 tp304 stainless hlau tubingtus xa khoom nrog 15+ kev xa tawm.Tiv tauj pebkom paub ntau ntxiv thiab quotes dawb!
Common Specifications thiab Standards
ASTM A 312 Cov Lus Qhia Tshwj Xeebyog qhov tshwj xeeb tshwj xeeb rau 304 stainless hlau yeeb nkab hauv feem ntau cov lag luam xa tawm. Nws npog ob qho tib si seamless thiab welded yeeb nkab, qhia qhov ntev (NPS thiab lub sij hawm), thiab yuav tsum tau kuaj hydrostatic los yog tsis yog - kev ntsuam xyuas puas rau seamless yeeb nkab.
ASTM A 213npog seamless ferritic / austenitic (duplex) thiab austenitic stainless hlau raj, feem ntau siv rau cov cua kub exchangers thiab boilers. Yog koj yuav304 stainless hlau rajes tsis yog yeeb nkab, qhov no yog qhov spec.
TS EN 10216-5(seamless) thiabTS EN 10217-7(welded) yog cov European sib npaug. RauEU PEBKev ua raws li cov cuab yeej siv siab, cov ntaub ntawv rau EN 10204 3.1 yog yuav tsum tau- cov ntaub ntawv pov thawj kev xeem nrog cov nqi ntsuas tiag tiag, tsis yog nqe lus ntawm kev ua raws cai.
JIS G3459yog tus qauv Nyiv Pooj, muaj nyob rau hauv cov haujlwm Esxias Qab Teb Hnub Tuaj uas Nyiv - cov cuab yeej tshwj xeeb tau teev tseg.
Yog tias koj qhov project nyob hauvLub teb chaws Yelemees, Ltalis, Netherlands, lossis lwm lub tebchaws EU, xyuas kom tseeb tias koj tus neeg muag khoom muab EN- cov ntaub ntawv txheem. Ib daim ntawv pov thawj ASTM ib leeg yuav tsis txaus siab rau PED audit.
Phab ntsa Thickness: Teem caij 10, 40, 80-Qhov haum rau koj qhov project
Cov yeeb nkab yog teev los ntawm nominal yeeb nkab loj (NPS) thiab tus lej teem sijhawm. Lub sij hawm txiav txim siab phab ntsa thickness.
Teem caij 10: Nyias phab ntsa. Siv rau qis- cov ntawv thov siab, siv cov qauv, thiab qhov hnyav hnyav. OD kam rau ua yog looser.
Teem caij 40: Standard workhorse. Feem ntau cov kav dej thiab cov txheej txheem dav dav kav dej poob ntawm no.
Teem caij 80: Phab ntsa hnyav. Kev ntsuas siab siab, kev siv tshuab.
Teem caij 160: hnyav ntxiv. Tshwj xeeb rau siab - siab lossis siab - kev siv kub.
Surface Finishes: Yam koj tau txais tiag tiag
Feem ntau 304 stainless hlau yeeb nkab nkoj nkoj hauv ib qho ntawm peb qhov tiav:
| Ua kom tiav | Rau (µm) | Kev siv yam |
|---|---|---|
| 2B | 0.1–0.5 | Lub hom phiaj dav dav, feem ntau tom qab annealing thiab pickling |
| Tsis yog . 1 | 1.0–3.0 | Mill tiav, tsis polished, feem ntau siv rau kev siv tshuab |
| Bright Annealed (BA) | 0.05–0.2 | Polished sab hauv, zoo corrosion kuj |
Rausab nraum zoov los yog ntug hiav txwv raug-xavUAE, Qatar, lossis Saudi ntug dej hiav txwv- qhov ua tiav ntawm qhov chaw tseem ceeb tshaj li feem ntau cov ntawv spec lees paub. Ib qho rougher nto (Ra siab dua) tuav cov dej noo thiab chlorides yooj yim dua. polished los yog BA tiav nrog Ra hauv qab 0.5 µm yuav tiv taus pitting pib zoo dua. Nws yog tus nqi me me uas them tawm hauv lub neej ntev.
304 vs 316: Puas yog Kev Txhim Kho Tsim Nyog?
316 stainless hlau yeeb nkab ntxiv 2-3% molybdenum. Uas pob PREN los ntawm ~19–20 txog ~ 24–26. Cov molybdenum ho txhim kho chloride tsis kam.
Raudej hiav txwv, ntug hiav txwv dej, los yog siab -chloride ib puag ncig- feem ntau hauvMiddle East desalination tej yaam num, offshore platforms nyob rau hauv lub Gulf, los yog cov ntug dej hiav txwv tshuaj nroj tsuag-316 lossis 316L feem ntau yog qhov kev xaiv zoo dua. Tus nqi premium khiav roughly 20-30%.
Rauhuab cua- cua txias hauv tsev ib puag ncig, thaj chaw ua haujlwm qhuav, lossis qis- daim ntawv thov corrosion-uas npog ntauKev tsim kho kev lag luam sab hnub tuaj Asia-304 stainless hlau yeeb nkab yog tsim nyog thiab cov nqi txuag yog tiag tiag.
Qhov yuam kev qee tus neeg yuav khoom ua: lawv ua rau 316 "kom nyab xeeb" yam tsis tau kuaj xyuas seb 304 puas ua haujlwm rau cov kev pabcuam. Koj siv nyiaj koj tsis tas yuav siv. Los yog hloov pauv, lawv spec 304 rau kab ciam teb -chloride ib puag ncig thiab xav paub yog vim li cas nws tsis ua haujlwm ntawm 18 lub hlis.
304 Stainless Hlau Yeeb Nkab Nqe Factors
Dab tsi tiag txav tus nqi?
Cov nqi raw khoom: Nickel yog tus nqi tseem ceeb tsav tsheb. Thaum nickel txav, 304 txav.
Seamless vs welded: Seamless commands tus nqi, feem ntau 20-40% tshaj qhov sib npaug welded.
Phab ntsa thickness: Lub sijhawm hnyav dua siv cov khoom siv ntau dua.
Mill keeb kwm: Japanese thiab European mills feem ntau tus nqi siab dua Taiwanese thiab Kauslim mills, uas zaum saum cov neeg tsim khoom hauv Suav teb. Kev sib kis qhia txog kev tswj xyuas cov txheej txheem, cov ntaub ntawv zoo, thiab sib xws.
Cov ntaub ntawv pob: Mill test reports, EN 10204 3.1 daim ntawv pov thawj, thib peb-kev soj ntsuam tog-cov no ntxiv cov nqi tab sis kuj ntxiv kev ruaj ntseg.
