Uns S31803 Duplex Stainless Hlau Yeeb Nkab
UNS S31803 Duplex Stainless Hlau Yeeb Nkab yog lub hauv paus ntawm tsev neeg duplex. Qhov sib npaug austenite thiab ferrite nplej muab kwv yees li ob npaug ntawm cov khoom muaj zog ntawm 316L, thaum lub PREN Ntau dua los yog sib npaug rau 34 tiv thaiv pitting thiab chloride stress-corrosion. Peb tsim cov qib ua tiav raws li ASTM A790, EN 10216-5, thiab NORSOK M-001 los ntawm 100% European yaj, kom ntseeg tau tias txhua qhov Uns S31803 Duplex Stainless Steel Pipe peb nkoj muaj cov pedigree uas koj cov neeg soj ntsuam xav tau. Txawm hais tias koj xav tau ib lub sij hawm 10 spool rau subsea umbilical los yog ib lub sij hawm 160 manifold kab rau qaub kev pab cuam, no 22 Cr - 5 Ni - 3 Mo - 0.15 N alloy muab qhov zoo tshaj plaws ua ke ntawm lub zog, weldability, thiab pricing nyob rau hauv niaj hnub kev lag luam corrosion.
Nta & Qhov Zoo
- Seem efficiency - Yield Ntau dua los yog sib npaug rau 485 MPa tso cai rau 20-30% qhov hnyav txo piv rau 316L los ntawm kev poob ib phab ntsa tuab.
- Chloride tiv thaiv kab mob - PREN 34-36 tiv taus pitting hauv 3% NaCl ntawm 60 degree; Qhov tseem ceeb pitting kub yog feem ntau 35 degree, uas yog ob zaug ntawm 316L.
- Weld yam xyuam xim nrog cov pa roj carbon tsawg (tsawg dua lossis sib npaug li 0.03%) thiab sib npaug ferrite (35-55%), tshem tawm cov ncej-weld sensitization. Feem ntau cov thicknesses tsis xav tau kev kho cua sov tom qab vuam.
- Tus nqi ruaj khov - Nickel cov ntsiab lus yog 5% qis dua hauv qib 6-Mo, yog li cov nqi khoom siv taug qab LME tsawg dua thiab koj cov lus hais tseem siv tau ntev dua.
- Cov lus teb sib nqus - Ferritic theem ua rau yooj yim PMI kev soj ntsuam hauv thaj teb, thaum lub zog nyob qis dua 100 J ntawm -46℃rau kev nyab xeeb ntawm ntug dej hiav txwv.
Daim ntawv thov
- Cov neeg yuav khoom siv Uns S31803 Duplex Stainless Steel Pipe rau:
- Subsea flow- kab, risers thiab hydraulic tswj kab
- Sab saum toj-sab dej hiav txwv txias, ballast thiab hluav taws-dej nplhaib- lub ntsiab
- LNG nkoj thauj cov caj npab thiab cov xaim xaim xaim mus rau -50 degree
- Pulp digester cawv rhaub, dawb- cawv kab thiab tshuaj ntxuav tes
- Desalination siab -siab brine thiab permeate collectors
- Petrochemical kem overhead condensers nplua nuj nyob rau hauv chlorides
- Flue-gas desulphurisation absorber recycle thiab gypsum slurry kev pab cuam
- Civil architecture: choj nro rods, tes -rail thiab ntug hiav txwv façade txhua qhov twg ntsev - tsuag xav tau ntau tshaj 316L.
Specifications & Technical Parameters
| Qeb | Paub meej |
| Qhov ntau thiab tsawg | OD 6-219 hli, phab ntsa thickness 0.8-25 hli, ntev Less tshaj los yog sib npaug rau 12 m |
| Cov qauv kev tswj hwm | ASTM A790, A928; ASME SA790, SA928; EN 10216-5 1.4462; NORSOK MDS D41; JIS G3459 SUS329J3L |
| Chemical muaj pes tsawg leeg (wt%) | Cr 22.0–23.0; Nim 4.5–6.5; Mo 3.0–3.5; N 0.14–0.20; Mn Tsawg dua lossis sib npaug rau 2.0; Si Less tshaj los yog sib npaug rau 1.0; C Tsawg dua lossis sib npaug li 0.03; P Tsawg dua lossis sib npaug li 0.03; S Tsawg dua lossis sib npaug rau 0.02; Fe bal. |
| Mechanical Properties (kev daws teeb meem-annealed) | Tensile zog 620-770 MPa; Yield zog Ntau dua los yog sib npaug rau 485 MPa; Elongation Ntau dua lossis sib npaug li 25%; Hardness Tsawg dua los yog sib npaug rau 28 HRC; Kev cuam tshuam lub zog 100 J ntawm -46 degree; PIB 34-36 |
PebKev pabcuam
01
Tshuag thiab logistics
Ntau tshaj 220 qhov ntau thiab tsawg tau tuav hauv cov tsev khaws khoom sib koom ua ke hauv Shanghai thiab Rotterdam, nrog kev xa khoom tsis pub dhau peb hnub ntawm FOB, CIF, lossis DDP.
02
MTC Pob
EN 10204 3.1 yog lub neej ntawd, nrog 3.2 los ntawm TÜV lossis Lloyd muaj nyob hauv 5 hnub ua haujlwm.
Kev ntim khoom nyab xeeb muaj txhua lub yeeb nkab kawg tau capped thiab qhwv nrog VCI zaj duab xis, lub thawv plywood raug cua sov- kaw thiab steel strapped, thiab silica gel rau kev hla hiav txwv.
03
Tom qab - kev muag khoom
Mill metallurgists ntawm kev ua haujlwm 24-teev; ib qho kev thov zoo tau tshuaj xyuas hauv 48 teev, thiab cov khoom siv hloov pauv tau xa tawm ntawm peb cov nqi yog tias pom zoo.
FAQ
Q: Puas yog Uns S31803 Duplex Stainless Hlau Yeeb Nkab xav tau PWHT tom qab vuam?
A: Normally no. With correct heat input 0.5-1.5 kJ/mm and inter-pass ≤ 150 °C, properties remain intact; PWHT is only advised for thick sections (>25 mm) hauv kev pabcuam qaub.
Q: Nws coj li cas hauv 50℃seawater?
A: Qhov ntsuas kub tseem ceeb yog feem ntau 35-40℃. Rau kev nthuav tawm tas li saum toj no, peb pom zoo kom super-duplex lossis nce molybdenum band rau 3.2% min.
Q: Kuv puas tuaj yeem xaj ib qho random ntev?
A: Yog. Peb muab SRL (5-7 m), DRL (11-13 m) los yog txiav-rau-ntev nyob rau hauv ± 2 hli kam rau ua.
Q: Kuv yuav tsum siv lub tshuab xaim dab tsi?
A: Siv ER2209 rau GTAW/SAW lossis E2209-17 rau SMAW; Lawv phim lub zog hlau thiab khaws ferrite 35-60% hauv qhov vuam.
Q: Puas yog cov yeeb nkab haum rau -50℃LNG?
A: Charpy cuam tshuam 100 J ntawm -46℃yog tus qauv; rau -50℃peb ua qhov kev sim ntxiv thiab tuaj yeem txwv cov pa roj carbon tsawg dua lossis sib npaug li 0.025% los lav 70 J.
Cim npe nrov: uns s31803 duplex stainless hlau yeeb nkab, Tuam Tshoj, manufacturers, lwm tus neeg, Hoobkas, lag luam wholesale, nqe, hauv Tshuag
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