ASTM B705 UNS N08825 (Incoloy 825) Welded Nickel Alloy Yeeb Nkab: Kev Tsim Khoom Muaj Peev Xwm & Cov Khoom Qhia Tshwj Xeeb Duab Tshwj Xeeb

ASTM B705 UNS N08825 (Incoloy 825) Welded Nickel Alloy Yeeb Nkab: Kev Tsim Khoom Muaj Peev Xwm & Cov Lus Qhia Txog Khoom

Kev Piav Qhia Luv:

Womic Steel muab ASTM B705 UNS N08825 (Incoloy 825) welded nickel alloy yeeb nkab rau qhov chaw corrosive heev suav nrog cov kua qaub muaj zog (sulfuric, phosphoric, nitric), dej hiav txwv, kev pabcuam qaub nrog H₂S siab thiab chlorides, thiab kev siv kub siab. N08825 muaj qhov tsawg kawg nkaus ntawm 240 MPa (35,000 psi) thiab lub zog tensile ntawm 550 MPa (80,000 psi) nrog kev ua haujlwm zoo heev. Cov hlau muaj nickel (38-46%), chromium (19.5-23.5%), molybdenum (2.5-3.5%), tooj liab (1.5-3.0%), thiab titanium stabilization, muab kev tiv thaiv zoo rau pitting, crevice corrosion, thiab kev ntxhov siab corrosion cracking hauv ob qho tib si txo thiab oxidizing ib puag ncig. Kev tsim khoom suav nrog ERW rau cov kab uas hla me me thiab EFW rau cov kab uas hla loj, ob qho tib si nrog kev nkag mus tag nrho thiab kev daws teeb meem tom qab vuam. Sab nraud txoj kab uas hla ntawm 6.35mm txog 610mm (1/4″ - 24″) rau ERW; txog li 1219mm (48″) rau EFW/LSAW, phab ntsa tuab 0.5mm - 50mm, qhov ntev txheem txog li 12m, kev cai txog li 18m. Daim ntawv pov thawj zeb, hydrotest, 100% UT, cov tshuaj annealed thiab pickled tiav, beveled lossis tiaj tus kawg muaj. Haum rau cov nroj tsuag sulfuric acid, phosphoric acid ntau lawm, nuclear roj rov ua dua tshiab, offshore sour kev pabcuam (siab H₂S + chlorides), dej hiav txwv txias (kub siab dua), tshuaj tankers, thiab flue gas desulfurization (FGD) absorber outlets.

Qhov Loj ntawm Cov Yeeb Nkab Welded Nickel Alloy:Sab Nraud Txoj Kab uas hla: 6.35mm – 1,219mm (1/4″ – 48″), Phab Ntsa Thickness: 0.5mm – 50mm (Teem sijhawm 5S, 10S, 40S, 80S), Ntev: 6m – 12m tus qauv, kev cai ntev txog li 18m

Tus Qauv & Qib ntawm Welded Nickel Alloy Yeeb Nkab:ASTM B705 (cov yeeb nkab vuam) / ASTM B709 (cov yeeb nkab vuam) UNS N08825; kuj tseem ASME SB-705; Sib npaug rau Incoloy 825; Werkstoff 2.4858; EN 2.4858

Kev Siv Cov Yeeb Nkab Welded Nickel Alloy:Cov chaw tsim cov kua qaub sulfuric (oleum, concentrated H₂SO₄, dilute acid service), phosphoric acid production (wet process, evaporators), nuclear fuel reprocessing (nitric acid nrog fluorides), offshore sour service (siab H₂S ib nrab siab nrog chlorides), seawater cooling systems nrog high temperature (50-80°C), chemical tankers thiab cargo piping (ntau yam tshuaj lom neeg), flue gas desulfurization (FGD) outlet ducts, pickling thiab acid regeneration plants, hydrofluoric acid service (dilute), wastewater treatment (highly corrosive industrial nkim pov tseg), roj thiab roj tsim nrog high CO₂, H₂S, thiab chlorides (qab zib thiab qaub service)

Womic Steel muab cov khoom zoo thiab cov nqi sib tw ntawm ASTM B705 UNS N08825 welded nickel alloy yeeb nkab, Incoloy 825 welded raj, CRA yeeb nkab, acid resistant alloy yeeb nkab, sour service nickel alloy yeeb nkab. Daim ntawv pov thawj zeb EN 10204 3.1/3.2, hydro test, UT, solution annealed, beveled/plain ends, pickled finish muaj. Lub Hoobkas ncaj qha muab rau cov tshuaj lom neeg, nuclear, offshore, thiab acid cog projects thoob ntiaj teb.

Xa email rau peb Cov Lus Qhia Txog Khoom

Cov Khoom Qhia Txog Khoom

Cov Cim Npe Khoom

1. Womic Steel: Kev Muaj Peev Xwm Tsim Khoom & Lub Zog ntawm Lub Tuam Txhab

Womic Steel Group yog ib lub chaw tsim khoom tseem ceeb thiab xa tawm thoob ntiaj teb nrog ntau tshaj 20 xyoo ntawm kev txawj ntse hauv kev tsim cov kav dej tiv taus corrosion alloy (CRA) suav nrog nickel alloys, duplex stainless steels, thiab titanium. Peb lub chaw tsim khoom tshwj xeeb nickel alloy welded yeeb nkab siv ntau yam thev naus laus zis vuam nrog kev tswj hwm nruj ntawm cov cua sov nkag thiab kev kho cua sov tom qab vuam kom tswj tau qhov corrosion tsis kam thiab cov khoom siv kho tshuab:

●ERW (Fais fab tsis kam vuam) Kab:Rau cov kab uas hla ntawm 6.35mm txog 610mm (1/4″ - 24″), phab ntsa tuab ntawm 0.5mm txog 12.7mm. Kev vuam zaus siab nrog cov cua sov qis kom tsis txhob muaj kev sib cais. Zoo tagnrho rau cov kav dej me me mus rau nruab nrab txoj kab uas hla N08825 rau cov kab ntsuas, kev txhaj tshuaj tshuaj, thiab cov kav dej ua haujlwm.

●EFW (Fais Fab Fusion Vuam) Kab:Rau cov txoj kab uas hla ntawm 219mm txog 1219mm (8″ - 48″), phab ntsa tuab ntawm 4.0mm txog 50mm. TIG (GTAW) cov hauv paus hla nrog SAW fill hla, siv cov hlau sib phim (ERNiCrMo-3 lossis ERNiCrMo-10) thiab cov pa roj inert shielding.

●LSAW / SAWL Kab rau Nickel Alloys:Rau cov kab uas hla ntawm 406mm txog 1524mm (16″ - 60″), phab ntsa tuab txog li 50mm. Kev vuam arc hauv qab ntawm cov phaj hlau nickel uas dov nrog kev tswj cua sov.

Txhua lub kav dej nickel alloy welded raug annealing (kev kho cua sov) ntawm 980-1040 ° C ua raws li kev quenching dej lossis cua txias sai kom rov qab tiv taus corrosion thiab yaj cov carbide lossis intermetallic precipitates, ua raws li pickling thiab passivation.

Cov Ntawv Pov Thawj Zoo & Kev Ua Raws Cai:

● ISO 9001: 2015 Tau Ntawv Pov Thawj

● PED 2014/68/EU (CE Marking) rau cov khoom siv siab

● EN 10204 3.2 Daim Ntawv Pov Thawj nrog kev lees paub los ntawm lwm tus (TÜV, BV, SGS, LR)

● Kev Tshuaj Xyuas Sab Nraud (TPI) tau pom zoo los ntawm SGS, BV, ABS, DNV, TÜV

● NACE MR0175 / ISO 15156 rau kev pabcuam qaub (H₂S)

● ASME Boiler thiab Pressure Vessel Code (Seem VIII, Div. 1) thaum thov

Womic Steel muab cov kav dej nickel alloy welded rau ntau tshaj 30 lub tebchaws thoob plaws kev ua tshuaj lom neeg, kev tsim chiv, nuclear, thiab kev lag luam offshore.

Kev Yooj Yim Tsim Khoom:

● ERW: 6.35–610mm OD × 0.5–12.7mm WT × ≤ 12m

● EFW: 219–1219mm OD × 4.0–50mm WT × ≤ 12m (ntev dua yog thov)

● LSAW: 406–1524mm OD × 6.0–50mm WT × ≤ 18m

● Cov kev xaiv tiav: Annealed thiab pickled, bright annealed (rau cov raj me me)

2. ASTM B705 UNS N08825: Cov Khoom Siv Sib xyaw & Cov yam ntxwv ua tau zoo

UNS N08825 (Incoloy 825) yog ib qho hlau nickel-iron-chromium alloy nrog ntxiv molybdenum, tooj liab, thiab titanium. Nws yog tsim los muab kev tiv thaiv zoo heev rau ob qho tib si txo thiab oxidizing acids, nrog rau chloride-induced kev ntxhov siab corrosion cracking (SCC) thiab pitting. Cov titanium ntxiv stabilizes lub alloy tiv thaiv intergranular tawm tsam tom qab welding (zoo ib yam li stabilized stainless hlau). Cov nickel siab (38-46%) muab kev tiv thaiv zoo heev rau chloride SCC, thaum chromium thiab molybdenum muab kev tiv thaiv pitting. Tooj liab ntxiv kev tiv thaiv rau sulfuric thiab phosphoric acids.

Cov Tshuaj Lom Zem (Kev Tshuaj Xyuas Ladle, % los ntawm pawg):

Khoom	UNS N08825 (ASTM B705)
C	≤ 0.050 (feem ntau ≤ 0.025)
Mn	≤ 1.00
P	≤ 0.030
S	≤ 0.030
Si	≤ 0.50
Cr	19.5 – 23.5
Ni	38.0 – 46.0
Mo	2.5 – 3.5
Cu	1.5 – 3.0
Ti	0.6 – 1.2
Al	≤ 0.20
Fe	Qhov Nyiaj Tshuav

Cov Khoom Siv Kho Tshuab (Chav Kub, Tshuaj Annealed):

Vaj tse	UNS N08825
Lub Zog Tawm (qis tshaj, 0.2% offset)	240 MPa (35,000 psi)
Lub zog Tensile (min)	550 MPa (80,000 psi)
Kev ncua ntev (min, 50mm gauge)	30%
Qhov nyuaj (ib txwm)	75-85 HRB

Cov Khoom Siv Lub Cev:

● Qhov Ceev: 8.14 g/cm³

● Modulus ntawm Elasticity: 195 GPa (28.3 × 10⁶ psi)

● Kev Ua Kub: 11.1 W/m·K ntawm 100°C

● Cov Coefficient ntawm Thermal Expansion: 14.0 × 10⁻⁶/°C (20-100°C)

Kev Tiv Thaiv Kev Xeb:

● Tiv taus cov kua qaub sulfuric zoo heev rau ntau yam kev sib xyaw (txog li 96% ntawm qhov kub nruab nrab)

● Kev tiv taus zoo heev rau phosphoric acid (txheej txheem ntub dej) uas muaj chlorides thiab fluorides

● Zoo tiv taus nitric acid thiab cov organic acids

● Kev tiv thaiv zoo heev rau kev tawg ntawm chloride stress corrosion (SCC)

● Tiv thaiv xeb zoo thaum muaj qhov pitting thiab crevice hauv cov chaw chloride (PREN ≈ 30-35)

● Tiv taus kev xeb intergranular tom qab vuam (titanium stabilized)

● Haum rau kev pabcuam qaub (NACE MR0175) txog li qhov siab H₂S ib nrab ntawm cov siab

Cov Kev Txwv ntawm Kev Xeb (Kwv yees li):

● Cov kua qaub sulfuric (H₂SO₄): siv tau txog li 96% ntawm qhov kub thiab txias hauv chav tsev; txwv thaum npau

● Phosphoric acid (H₃PO₄): zoo heev txog li 80% ntawm 100°C

● Hydrochloric acid (HCl): txwv rau dilute (< 5%) ntawm chav tsev kub

● Nitric acid (HNO₃): zoo txog li 40% ntawm qhov kub nruab nrab

3. Kev Ua Raws Li Qhov Ntev thiab Cov Qauv

Khoom	Cov Lus Qhia Tshwj Xeeb
Tus Qauv	ASTM B705 / ASME SB-705 (yeeb nkab); ASTM B709 (tubing)
Cov Txheej Txheem Tsim Khoom	ERW, EFW, LSAW
Sab Nraud Txoj Kab uas hla	ERW: 6.35 - 610mm; EFW/LSAW: 219-1524mm
Phab ntsa tuab ntau yam	ERW: 0.5-12.7mm; EFW/LSAW: 4.0-50mm
Lub Sijhawm Teem Caij	5S, 10S, 40S, 80S (rau NPS 1/8″ - 48″)
Qhov Ntev Ntau	Txheem: 6m; Ncua: 12m, 18m, txog li 18m (ntev dua yog thov)
Xaus tiav	Qhov Kawg Plain (PE), Qhov Kawg Beveled (BE)
Qhov Chaw Tiav	Annealed & Pickled, Bright Annealed
Kev kam rau siab	OD: ±0.5% lossis ±3.2 hli; WT: ±12.5% (ib qho ASTM B775); Ntev: +50 hli / -0 hli

4. Qhov Loj & Cov Lus Qhia Tshwj Xeeb Muaj - ASTM B705 UNS N08825 Welded Nickel Alloy Yeeb Nkab (Xaiv Cov Qhov Loj Ib Txwm)

NPS	OD (hli)	Teem sijhawm	Qhov hnyav (hli)	Qhov hnyav (kg/m2)	Qhov Ntev Txheem	Daim Ntawv Thov Ib Txwm Muaj
1/2″	21.3	40S	2.77	1.27	6m	Kev txhaj tshuaj
3/4″	26.7	40S	2.87	1.69	6m	Cov kab ntsuas
1″	33.4	40S	3.38	2.50	6m	Cov kab noj kua qaub
1-1/2″	48.3	40S	3.68	4.05	6m	Cov kav dej ua haujlwm
2″	60.3	40S	3.91	5.44	6m / 12m	Cov kua qaub sulfuric
3″	88.9	40S	5.49	11.3	6m / 12m	Cov kua qaub phosphoric
4″	114.3	40S	6.02	16.1	6m / 12m	Cov kab evaporator
6″	168.3	40S	7.11	28.3	6m / 12m	Qhov chaw muag khoom FGD
8″	219.1	40S	8.18	42.6	12m	Offshore sour line
10″	273.0	40S	9.27	60.3	12m	Kev rov ua dua ntawm cov kua qaub
12″	323.9	40S	10.31	79.8	12m	Lub taub hau kua qaub tseem ceeb
16″	406.4	40S	12.70	123.4	12m	Kev ua dua tshiab ntawm nuclear
20″	508.0	40S	15.09	183.5	12m	Txoj kab uas hla loj
24″	609.6	40S	17.48	255.5	12m	Daim ntawv thov tshwj xeeb

*Muaj cov qhov loj me tshwj xeeb sab nraum cov no. Cov kav dej N08825 welded yuav tsum siv sijhawm ntev dua (tsawg kawg 60 hnub) vim yog kev xaiv tshwj xeeb ntawm cov strip/phaj.*

5. Cov Qauv Nickel Alloy & Qib Uas Womic Steel Tsim

Tus Qauv	Cov Qib Hlau / Alloy	Daim Ntawv Thov Ib Txwm Muaj	Txheej Txheem Vuam
ASTM B705	UNS N08825 (Incoloy 825)	Sulfuric, phosphoric acid	EFW/LSAW/ERW
ASTM B709	UNS N08825	Cov kav dej, cov khoom siv hloov pauv cua sov	ERW
ASTM B619	UNS N06022 (Hastelloy C-22), N10276 (C-276)	Muaj zog heev	EFW/LSAW
ASTM B622	UNS N06022, N10276	Kev Siv Raj	ERW
ASTM B464	UNS N08020 (20 Cov Hlau)	Cov kua qaub sulfuric	EFW
ASTM B729	UNS N08020	Kev Siv Raj	ERW

Kev Siv:Cov chaw tsim kua qaub (H₂SO₄, H₃PO₄, HNO₃), kev ua dua tshiab ntawm nuclear, kev pabcuam kua qaub ntawm ntug dej hiav txwv, FGD, cov nkoj thauj tshuaj lom neeg.

6. Cov Txheej Txheem Tsim Khoom - Welded Nickel Alloy Yeeb Nkab (ERW, EFW, LSAW)

Kev vuam hlau nickel yuav tsum tau tswj hwm qhov kub nkag thiab kev kho cua sov tom qab vuam kom tswj tau qhov corrosion tsis kam. Alloy 825 yog titanium-stabilized, tab sis qhov kub nkag ntau dhau tseem tuaj yeem ua rau muaj kev cuam tshuam lossis kev sib cais.

ERW (Fais fab tiv taus vuam) Txheej Txheem - Me me mus rau nruab nrab txoj kab uas hla (6.35–610mm OD):

●Kev Tshuaj Xyuas Khoom Siv Raw (Strip / Coil):Daim hlau nickel alloy tau txheeb xyuas rau N08825 muaj pes tsawg leeg (Ni 38-46%, Cr 19.5-23.5%, Mo 2.5-3.5%, Cu 1.5-3.0%, Ti 0.6-1.2%). Txhua lub kauj muaj tus lej cua sov tshwj xeeb nrog kev taug qab tag nrho.

●Kev Tshem Tawm & Kev Sib Tw

●Kev Txiav Ntug Ntug

●Kev tsim:Kev tsim cov yob tas mus li.

●Kev Vuam Zaus Siab:Siv cua sov tsawg (≤ 1.2 kJ/mm2) los tiv thaiv kev sib cais. Siv vuam hauv huab cua inert (argon shielding) kom tsis txhob oxidation.

●Kev Sib Dhos Seam:Induction annealing ua raws li kev txias sai.

●Kev Loj thiab Kev Ncaj Ncees

●Txiav kom ntev

●NDT:Kev sim tam sim no eddy (100%) + xaiv tau UT.

●Kev Kho Mob Kub (Tag Nrho Cov Yeeb Nkab):980-1040°C, dej tua (lossis cua txias sai). Yuav tsum tau kho kom rov qab tiv taus xeb.

●Kev Ntsuas Hydrostatic

●Kev Ua Kua Txob thiab Kev Ua Kom Tsis Txhob Mob(siv cov kua qaub tshwj xeeb rau cov hlau nickel)

●PMI (XRF) & Ferrite kuaj xyuas (tsis muaj ferrite hauv nickel alloy)

●Kev Tshuaj Xyuas Zaum Kawg & Kev Cim

EFW (Electric Fusion Vuam) Txheej Txheem - Txoj Kab uas hla loj (219–1219mm OD, 4.0–50mm WT):

●Kev Npaj Phaj:Phaj hlau nickel, cov npoo beveled (X bevel).

●Kev Tsim Dov

●Kev Sib Txuas Tack

●TIG (GTAW) Root Pass:Cov hlau sib phim (ERNiCrMo-3 lossis ERNiCrMo-10), argon backing gas nrog oxygen getter.

●Daim Ntawv Sau & Lub hau ntawm SAW:Kev siv cua sov tsawg (≤ 1.5 kJ/mm), qhov kub thiab txias ntawm qhov chaw hla ≤ 150°C. Cov dej ntws tshwj xeeb rau cov hlau nickel (tsawg sulfur).

●Sab Hauv Weld (rau cov kab uas hla loj)

●100% RT + UT(ib qho ASTM B775)

●Kev daws teeb meem Annealing:Kev kho cua sov tag nrho cov yeeb nkab (980-1040 ° C), dej tua.

●Kev Ua Kua Txob thiab Kev Ua Kom Tsis Txhob Mob

●Kev Ntsuas Hydrostatic

●PMI & Kev Tshuaj Xyuas Qhov Ntev

●Kev cim

Cov Txheej Txheem LSAW rau Nickel Alloys - Txoj Kab uas hla loj heev (406–1524mm OD, 6.0–50mm WT):

● UOE lossis JCOE tsim los ntawm nickel alloy phaj

● Ob sab SAW vuam nrog cua sov tsawg

● Kev kho kom sov tag nrho tom qab vuam

Cov Ntsiab Lus Tswj Xyuas Tseem Ceeb rau N08825 Vuam:

● Cov cua sov nkag: ≤ 1.5 kJ/mm (lub hom phiaj ≤ 1.2 kJ/mm)

● Kub ntawm qhov nkag mus: ≤ 150°C

● Cov roj tiv thaiv: Argon (100%) rau TIG; argon + helium rau SAW

● Kev Ntxuav: Tshem cov roj ntau dhau ua ntej vuam (cov hlau nickel uas rhiab rau sulfur thiab lead)

● Kev ua kom cov tshuaj kub hnyiab: 980-1040°C, dej tua - yuav tsum tau ua.

● Tsis muaj ferrite hauv cov hlau vuam (cov hlau nickel alloy welds yog austenitic tag nrho)

7. Kev Tswj Xyuas Zoo & Cov Txheej Txheem Ntsuas rau ASTM B705 UNS N08825 Welded Nickel Alloy Pipe

Theem	Txoj Kev Tshuaj Xyuas	Lub Hom Phiaj
Cov Khoom Siv Raw	Kev Tshuaj Xyuas Tshuaj (OES lossis ICP)	Txheeb xyuas cov kev txwv N08825 (Ni, Cr, Mo, Cu, Ti, Fe)
Cov Khoom Siv Raw	Kev Ntsuas Tensile	Tawm los ≥ 240 MPa, Tensile ≥ 550 MPa
Cov Khoom Siv Raw	Qhov nyuaj	75-85 HRB feem ntau
Cov Khoom Siv Raw	Kev Ntsuas Kev Xeb (ASTM G28)	Kev tiv thaiv corrosion intergranular (rau kev pabcuam kua qaub tseem ceeb)
Nyob rau hauv-Txheej Txheem	Kev Saib Xyuas Kub	≤ 1.5 kJ / hli
Nyob rau hauv-Txheej Txheem	Kub ntawm qhov sib tshuam	≤ 150 ° C
Vuam (ERW)	Eddy Tam Sim No (100%)	Kev ncaj ncees ntawm kev vuam
Kev vuam (EFW/LSAW)	100% UT (los yog PAUT)	Tshawb nrhiav qhov tsis zoo ntawm vuam
Kev vuam (EFW/LSAW)	RT (10-100% ib qho spec)	Qhov zoo ntawm vuam
Kev vuam	Cov Tshuaj Pleev Xim (PT)	Cov kab nrib pleb ntawm qhov chaw
Tom qab Annealing Solution	Kev Ntsuas Qhov Nyuaj	Xyuas kom meej tias cov tshuaj tau annealed lawm
Cov Yeeb Nkab Tiav Lawm	Kev Ntsuas Hydrostatic	Kev ua siab ncaj ncees
Cov Yeeb Nkab Tiav Lawm	PMI (XRF)	Paub meej qib (Ni, Cr, Mo)
Cov Yeeb Nkab Tiav Lawm	Kev Ntsuas Kev Xeb (ASTM G28 Xyaum A)	IGC tsis kam (yog tias teev tseg)
Cov Yeeb Nkab Tiav Lawm	Kev Pom thiab Kev Cim	Kev taug qab tau

Kev Xeem Xaiv Tau Rau Kev Pabcuam Tseem Ceeb:

● ASTM G28 Xyaum A (50% H₂SO₄ – ferric sulfate) rau kev tiv thaiv xeb intergranular

● ASTM G48 kev sim pitting (hauv FeCl₃, 6% ntawm 40 ° C) rau kev tiv thaiv chloride pitting

● Kev kuaj HIC/SSC rau kev pabcuam qaub (NACE TM0284, TM0177)

● Kev sim tensile kub siab (piv txwv li, ntawm 300 ° C)

● Kev ntsuas Ferrite (yuav tsum < 1% rau cov hlau nickel)

8. Cov Ntawv Thov Tseem Ceeb - ASTM B705 UNS N08825 Welded Nickel Alloy Pipe

●Cov nroj tsuag sulfuric acid:Siv rau kev tswj cov roj oleum (H₂SO₄ + SO₃), cov kua qaub concentrated (96-98%), cov kua qaub dilute (5-10%), thiab cov kav dej txias uas muaj kua qaub. Hloov cov hlau tsis xeb uas xeb sai.

●Kev tsim cov kua qaub phosphoric (txheej txheem ntub):Cov evaporators, flash coolers, thiab cov kav dej uas tuav phosphoric acid nrog chlorides thiab fluorides. Alloy 825 tiv taus ob qho tib si oxidizing thiab txo cov xwm txheej.

●Kev siv roj nuclear dua tshiab:Kev siv cov roj nuclear siv lawm uas yaj hauv nitric acid nrog fluorides. N08825 tiv taus xeb hauv qhov chaw muaj kev kub ntxhov heev no (siv rau hauv cov nroj tsuag Magnox thiab THORP).

●Kev pabcuam Offshore:Kev tsim roj thiab roj av nrog H₂S siab ib nrab siab (txog li 10 bar) ua ke nrog cov chlorides siab thiab kub txog li 200 ° C. NACE MR0175 tau tsim nyog.

●Dej hiav txwv txias (kub siab):Cov tshuab ua dej txias hauv cov chaw ua roj av ntug dej hiav txwv thiab cov chaw tsim hluav taws xob uas qhov kub ntawm dej hiav txwv tshaj 45 ° C (qhov twg 2205 thiab txawm tias super duplex yuav pitting). N08825 tiv taus pitting txog li 80 ° C.

●Cov kav dej tawm ntawm cov pa roj flue desulfurization (FGD):Cov dej ntws ntawm cov absorbers qhov twg ntub dej chloride-nplua nuj acidic gases muaj nyob. Alloy 825 yog tus qauv rau qhov hluav taws xob ducting thiab stack liners.

●Cov tsheb thauj tshuaj lom neeg:Cov kav dej thauj khoom rau cov tshuaj lom neeg hnyav xws li sulfuric acid, phosphoric acid, thiab organic acids. N08825 tau txais kev pom zoo los ntawm cov tuam txhab xa khoom tshuaj loj.

●Cov nroj tsuag pickling thiab acid regeneration:Cov kab hydrochloric acid (dilute) thiab cov kab sib xyaw ua ke rau cov hlau tsis xeb.

●Kev kho dej khib nyiab:Cov khib nyiab hauv kev lag luam uas muaj zog heev los ntawm cov chaw tsim tshuaj lom neeg (cov kua qaub sib xyaw, cov hlau hnyav, cov tshuaj chlorides).

9. Ntim & Xa Khoom - ASTM B705 UNS N08825 Welded Nickel Alloy Yeeb Nkab

Ntim:

●Kev tiv thaiv xeb:Yas qhwv los yog ntawv VCI. Rau kev siv tshuaj lom neeg, tsis pub muaj roj seem (ntim huv).

●Cov hau kawg:Cov hau yas ruaj khov (xim coded - feem ntau yog txiv kab ntxwv rau N08825).

●Kev Sib Txuas (Cov kab uas hla me me):Txhua lub yeeb nkab raug qhwv ib leeg, tom qab ntawd muab cov hlua khi uas tsis yog hlau khi ua ke (tsis txhob kov cov hlua khi hlau kom tiv thaiv kev ua qias tuaj).

●Kev ntim khoom ib leeg (Cov kab uas hla loj):Yas zaj duab xis qhwv nrog cov nplhaib ua npuas ncauj ntawm cov kav dej.

●Cov thawv ntoorau cov ntawv thov tseem ceeb (nuclear, pharmaceutical).

Kev Xa Khoom:

● Cov thawv rau ≤ 610 hli, cov khoom tawg rau cov kab uas hla loj dua.

●Cov ntaub ntawv pov thawj:MTC 3.1/3.2 (EN 10204), daim ntawv qhia txog kev kuaj dej, daim ntawv qhia UT/RT, daim ntawv qhia PMI, daim ntawv qhia txog kev kuaj xeb (ASTM G28 yog tias teev tseg), daim ntawv qhia txog qhov ntev, daim ntawv teev cov khoom ntim, COO. Kev taug qab tag nrho los ntawm tus lej cua sov mus rau cov yeeb nkab tiav.

10. Cov txiaj ntsig ntawm Womic Steel & FAQ - ASTM B705 UNS N08825 Welded Nickel Alloy Pipe

Vim li cas thiaj koom tes nrog Womic Steel rau N08825 Welded Pipe?

● Qhov Loj Tag Nrho: ERW 1/4″ – 24″, EFW/LSAW 8″ – 48″.

● Kev ua kom cov kua kub tag nrho tom qab vuam (980-1040°C, dej tua).

● Muaj kev sim xeb sib txuas ntawm cov khoom siv ib yam li ASTM G28 (yuav tsum muaj rau kev pabcuam kua qaub).

● NACE MR0175 daim ntawv pov thawj rau kev pabcuam qaub.

● Kev tswj xyuas zoo nruj - tsis muaj ferrite hauv cov hlau vuam.

● Lub sijhawm ua khoom sib tw rau cov kav dej nickel alloy: 60-75 hnub rau ERW, 75-90 hnub rau EFW.

Cov Lus Nug Feem Ntau (FAQ) - ASTM B705 UNS N08825 Cov Yeeb Nkab Welded

Q: Qhov txawv ntawm Incoloy 825 (N08825) thiab Alloy 20 (N08020) yog dab tsi?
A: Ob qho tib si siv rau kev pabcuam sulfuric acid. Alloy 20 (N08020) muaj nickel qis dua (32-38%) thiab chromium siab dua (19-21%) nrog tooj liab. N08825 muaj nickel siab dua (38-46%) thiab molybdenum (2.5-3.5%) ntxiv rau titanium stabilization. N08825 muaj kev tiv thaiv zoo dua rau pitting thiab chloride SCC thiab yog qhov tsim nyog dua rau kev pabcuam qaub (H₂S). Alloy 20 yog qhov pheej yig dua rau phosphoric acid thiab dilute sulfuric acid tsis muaj chlorides. N08825 feem ntau yog teev rau cov xwm txheej nruj dua.

Q: Puas yog N08825 tiv taus cov kua qaub sulfuric ntawm txhua qhov concentration?
A: Tsis muaj. N08825 zoo heev rau cov kua qaub sulfuric txog li 60% ntawm qhov kub txog li 100 ° C, thiab rau cov concentration ntawm 85-96% ntawm chav tsev kub. Hauv qhov nruab nrab (60-85%) thiab ntawm qhov kub siab dua, cov nqi xeb tuaj yeem siab. Rau cov kub siab concentrated H₂SO₄ (> 90%, > 150 ° C), cov hlau tshwj xeeb xws li Hastelloy C-276 yuav tsum tau. Ib txwm sab laj nrog cov ntawv qhia xeb rau cov xwm txheej tshwj xeeb.

Q: Puas yog N08825 xav tau kev kho cua sov tom qab vuam?
A: Rau feem ntau daim ntawv thov, N08825 tuaj yeem siv rau hauv qhov xwm txheej raws li-welded vim tias titanium stabilization tiv thaiv kev rhiab heev. Txawm li cas los xij, ASTM B705 xav tau kev daws teeb meem annealing (kev kho cua sov) rau cov yeeb nkab welded kom tau raws li cov khoom siv kho tshuab thiab kev tiv thaiv corrosion. Womic ua cov tshuaj annealing rau txhua cov yeeb nkab welded. Rau kev vuam teb, tsis tas yuav PWHT rau N08825.

Q: Cov hlau vuam twg raug pom zoo rau N08825?
A: AWS A5.14 ERNiCrMo-3 (Inconel 625) lossis ERNiCrMo-10 (Inconel 622) feem ntau siv rau kev vuam N08825. Cov khoom sib phim yuav yog ERNiCrMo-3. Womic siv ERNiCrMo-3 rau cov txheej txheem EFW. Rau kev vuam teb, tib yam khoom sib xws raug pom zoo.

Q: Puas siv tau N08825 rau kev pabcuam dej hiav txwv?
A: Yog. N08825 muaj kev tiv thaiv zoo heev rau kev xeb ntawm qhov pitting thiab crevice hauv dej hiav txwv, txawm tias nyob rau qhov kub siab (txog li 80 ° C). Nws feem ntau raug xaiv rau cov tshuab txias dej hiav txwv hauv cov chaw ua roj thiab cov chaw tsim hluav taws xob ntug dej hiav txwv qhov twg super duplex (2205) yuav raug kev txom nyem ntawm qhov kub siab dua. Txawm li cas los xij, rau feem ntau cov ntawv thov dej hiav txwv, duplex lossis super duplex yog txaus thiab pheej yig dua. N08825 feem ntau yog tseg rau cov tshuab dej hiav txwv nrog cov tshuaj lom neeg ntxiv (piv txwv li, dej hiav txwv chlorinated, kua qaub paug).

Q: N08825 puas haum rau kev pabcuam qaub (H₂S)?
A: Yog. N08825 tau tsim nyog raws li NACE MR0175/ISO 15156 rau kev pabcuam qaub nrog H₂S ib nrab siab txog li 1 bar (15 psi) thiab siab dua, nyob ntawm kev tswj qhov nyuaj. Nws feem ntau siv rau cov raj xa dej hauv qhov, cov kab dej ntws, thiab cov kav dej ua haujlwm hauv cov roj qaub thiab cov roj av uas 2205 duplex tsis txaus vim muaj H₂S lossis chlorides siab.

Q: Lub sijhawm ua khoom siv rau UNS N08825 welded yeeb nkab yog dab tsi?
A: 60-75 hnub rau ERW (me mus rau nruab nrab), 75-90 hnub rau EFW/LSAW (loj). Lub sijhawm ua khoom ntev dua li cov hlau tsis xeb vim tias cov hlau nplaum/phaj yog tsim tawm hauv cov khoom me me nrog lub sijhawm ua khoom ntev dua. Kev tshuaj xyuas los ntawm lwm tus neeg ntxiv 7-14 hnub. Kev txiav txim maj (45-60 hnub) tej zaum yuav ua tau rau cov qhov loj me yog tias cov khoom muaj nyob hauv Tshuag.

Q: Qhov kub siab tshaj plaws rau N08825 yog dab tsi?
A: N08825 siv tau rau kev pabcuam txuas ntxiv mus txog 550 ° C (1020 ° F) hauv cov chaw tsis muaj kua qaub. Rau kev pabcuam corrosive, qhov kub siab tshaj plaws yog txwv los ntawm corrodent. Hauv sulfuric acid, kev pabcuam feem ntau yog txwv rau <100 ° C; hauv phosphoric acid rau <150 ° C. Rau kev pabcuam oxidizing kub siab, cov hlau nrog chromium siab dua (xws li Alloy 600, 601, lossis 625) raug pom zoo.

Cov Lus Qhia Txog Qhov Project - North American Sulfuric Acid Plant Reboiler thiab Piping Replacement

Lub Tebchaws:Tebchaws Meskas (Louisiana, Gulf Coast chemical corridor)
Tus Qauv & Qib:ASTM B705 UNS N08825 (Incoloy 825)
Qhov Loj & Qhov Ntau:

● OD 219.1mm (8″) × Schedule 40S (8.18mm WT) – 600 meters (kwv yees li 20 tons) – EFW txheej txheem

● OD 168.3 hli (6″) × Schedule 40S (7.11 hli WT) – 400 meters (kwv yees li 10 tons) – EFW txheej txheem

● OD 88.9mm (3″) × Schedule 40S (5.49mm WT) – 800 meters (kwv yees li 8 tons) – ERW txheej txheem

● OD 60.3 hli (2″) × Schedule 80S (5.54 hli WT) – 1,000 meters (kwv yees li 6 tons) – ERW txheej txheem
Tag Nrho:2,800 meters, kwv yees li 44 tons

Cov Lus Qhia:ASTM B705 UNS N08825 cov tshuaj annealed thiab pickled, beveled kawg. Kev kuaj hydrostatic. 100% UT rau EFW kav dej, eddy tam sim no + UT rau ERW. PMI ntawm txhua lub kav dej. Yuav tsum tau kuaj xeb intergranular raws li ASTM G28 Xyaum A (ferric sulfate-sulfuric acid txoj kev) - tus nqi xeb < 10 mpy (mil ib xyoos). Kev kuaj tiv thaiv hydrofluoric acid (tus neeg siv khoom tshwj xeeb). Kev tshuaj xyuas thib peb los ntawm SGS USA.

Daim Ntawv Thov:Kev hloov cov kav dej acid reboiler thiab cov kab txheej txheem cuam tshuam hauv lub Hoobkas rov ua dua sulfuric acid. Lub Hoobkas rov qab tau cov sulfuric acid siv lawm los ntawm cov chav alkylation (refinery) los ntawm kev rhuav tshem thiab rov ua dua thermal. Cov kav dej tuav cov sulfuric acid kub (85-95% H₂SO₄) ntawm 150-200 ° C hauv seem reboiler, thiab dilute acid (5-10% H₂SO₄) ntawm 80-100 ° C hauv seem quench. Cov kav dej Alloy 20 (N08020) yav dhau los tsis ua haujlwm tom qab 4 xyoos vim muaj kev xeb thiab tawg intergranular. N08825 tau xaiv rau nws qhov kev tiv thaiv zoo rau ob qho tib si concentrated thiab dilute acid, nrog rau nws cov titanium stabilization.

Cov Kev Sib Tw thiab Kev Dais Teeb Meem:

●Cov kua qaub sulfuric uas kub thiab txias heev (85-95%, 150-200°C)– Cov hlau nplaum 20 xeb ntawm tus nqi > 50 mpy nyob rau hauv cov xwm txheej no. N08825 nrog cov tshuaj annealed mob thiab metallurgy kom zoo muab tus nqi xeb <5 mpy hauv ASTM G28 kev sim thiab hauv tus neeg siv khoom simulated txheej txheem daws teeb meem (85% H₂SO₄ ntawm 180 ° C, 336 teev). Womic muab cov ntawv qhia kev sim zeb thiab daim coupon kuaj xeb.

●Kev pheej hmoo ntawm kev xeb intergranular tom qab vuam- Txawm hais tias N08825 yog titanium stabilized, qhov cua sov tsis raug thaum lub sijhawm tsim khoom tuaj yeem ua rau chromium carbide nag lossis daus ntawm cov ciam teb noob. Womic tswj hwm weld cua sov nkag mus rau ≤ 1.2 kJ / mm thiab ua tiav tag nrho cov tshuaj annealing tom qab vuam. ASTM G28 kev sim ntawm cov qauv weld qhia tau tias tus nqi xeb 4-7 mpy (qis dua 10 mpy txwv).

●Kev tsim nyog ntawm cov txheej txheem vuam hauv thaj teb– Xav tau pab pawg neeg saib xyuas cog khoom los kho qhov chaw. Womic tau muab 20 daim coupon weld ntawm 6″ Schedule 40S nrog WPS pom zoo: GTAW nrog ERNiCrMo-3 filler, 100% argon backing, interpass ≤ 150°C. Cov coupon tau dhau qhov kev kuaj radiographic, PT, thiab ASTM G28. Pab pawg neeg vuam ntawm tus neeg siv khoom tau lees paub cov txheej txheem.

●Kev txheeb xyuas PMI - qhov sib txawv ntawm N08825 los ntawm cov hlau qis dua– Kev pheej hmoo ntawm kev sib xyaw N08825 nrog Alloy 825 (tib yam UNS) piv rau Alloy 625 (sib xyaw sib txawv). Womic tau ua XRF rau txhua lub yeeb nkab thiab sau txhua lub nrog cov cim xim (txiv kab ntxwv rau 825). Tsis muaj kev sib xyaw tshwm sim.

●Kev thauj khoom thaum lub sijhawm hloov pauv uas tau npaj tseg (4-lub lim tiam kaw)– Cov kav dej tau raug xa los ntawm Shanghai mus rau New Orleans, tom qab ntawd thauj mus rau Louisiana qhov chaw. Tag nrho 44 tons tau xa tuaj 10 hnub ua ntej pib ua haujlwm. Womic tau muab daim ntawv pov thawj zeb (EN 10204 Hom 3.2) thiab cov ntawv qhia kev kuaj xeb ua ntej rau tus neeg siv khoom QA pom zoo.

Qhov Tshwm Sim:Lub Hoobkas rov ua kua qaub tau rov pib dua tom qab tig rov qab. Tom qab 12 lub hlis ntawm kev ua haujlwm, kev tshuaj xyuas ntawm N08825 cov kav dej tsis pom muaj xeb ntsuas tau, tsis muaj tawg, thiab tsis muaj kev tawm tsam intergranular. Tus neeg siv khoom kwv yees tias cov kav dej tshiab yuav kav ntev li 15+ xyoo (piv rau 4 xyoos rau Alloy 20). Womic Steel tau ntxiv rau daim ntawv teev cov khoom siv pom zoo ntawm lub Hoobkas rau kev hloov cov kev pabcuam kua qaub yav tom ntej.

Tiv tauj:
Lub Vas Sab: www.womicsteel.com
Email: sales@womicsteel.com

Xov tooj / WhatsApp / WeChat:
Victor: +86 15575100681
Nkaus: +86 18390957568

Womic Steel - Koj tus khub txhim khu kev qha rau ASTM B705 UNS N08825 welded nickel alloy kav dej rau cov nroj tsuag sulfuric thiab phosphoric acid, nuclear reprocessing, offshore sour service, thiab cov dej hiav txwv kub siab thoob ntiaj teb.