T91 + Alloy 28 Bimetal Metallurgical Clad Pipe | Kub Siab + Corrosion Resistant Seamless Tube - Womic Steel

Kev Piav Qhia Luv:

T91 + Alloy 28 cov yeeb nkab uas sib txuas ua ke nrog hlau. Sab nraud T91 (X10CrMoVNb9-1) muab lub zog nkag mus txog 650 ° C; sab hauv Alloy 28 (UNS N08028) tiv taus cov chlorides siab, sulfuric / phosphoric acid, thiab cov xwm txheej qaub. Ua los ntawm centrifugal casting + kub extrusion - tag nrho seamless, tsis muaj longitudinal weld. Zoo tagnrho rau cov raj superheater, cov cua sov pov tseg, cov tshuaj hloov pauv kub siab.

Xa email rau peb Cov Lus Qhia Txog Khoom

Cov Khoom Qhia Txog Khoom

Cov Cim Npe Khoom

Sab Nraud (Tom Qab)

Sab Nraud (Tom Qab):T91 (X10CrMoVNb9-1 / 1.4903 / A213 T91) - hlau martensitic uas tiv taus kev nkag, kev pabcuam siab tshaj plaws 650 ° C

Sab Hauv (Cladding):Alloy 28 (UNS N08028 / 1.4563 / Sandvik 28) - siab Cr/Ni/Mo/Cu austenitic alloy, PREN 38-40

Qhov Loj Ntau:OD 38mm – 168mm; Phab ntsa sab nraud tuab 4mm – 15mm; Cladding tuab 1.8mm – 3.5mm; Ib qho ntev txog li 15m

Txheej Txheem:Centrifugal casting + kub extrusion - metallurgical bond shear zog ≥300 MPa

Cov Qauv:ASTM A213 (T91), API 5LD (clad yeeb nkab), NACE MR0175, PED 2014/68/EU

Cov ntawv thov:Cov tshuab ua kom sov / rov ua kom sov kub heev, cov chaw rov qab tau cua sov pov tseg (cov nroj tsuag sulfuric acid), cov tshuab hloov cua sov kub rau cov hydrocarbons chlorinated, cov nroj tsuag biomass / pov tseg-rau-lub zog

1. Txheej txheem cej luam - Vim li cas T91 + Alloy 28 Clad Pipe

Kev pabcuam kub siab feem ntau ua rau muaj teeb meem: cov khoom siv muaj zog txaus kom dim ntawm kev nkag mus (zoo li T91) xeb hauv cov pa roj lossis cov txheej txheem; cov hlau nplaum uas tiv taus xeb (zoo li Alloy 28) tsis muaj zog kub siab thiab kim heev.

T91 + Alloy 28 bimetal clad yeeb nkabdaws qhov no los ntawm kev sib cais cov haujlwm:

lSab Nraud T91ntsib qhov kub thiab txias siab (piv txwv li, cov pa roj flue ntawm 600-650 ° C) thiab muab lub zog tawg.

lSab Hauv Alloy 28kov cov kua dej corrosive (piv txwv li, acid condensate, chlorides) ntawm nws sab hauv.

Qhov kev sib xyaw ua ke yogtsis muaj qhov tsis sib xws– tsis muaj qhov txuas txuas ntev – ua tsaug rau qhov centrifugal casting + hot extrusion process. Qhov no tshem tawm qhov tsis muaj zog tshaj plaws uas pom muaj nyob rau hauv cov kav dej welded clad.

Cov kev npaj ib txwm muaj uas T91 + Alloy 28 zoo tshaj plaws:

Kev teeb tsa	Sab nraud	Sab hauv	Piv txwv
Lub tshuab cua sov Boiler	Cov pa roj tua hluav taws (650 ° C, oxidizing)	Chav (450 550 ° C, ntshiab)	T91 tiv taus kev oxidation sab nraud; Tsis tas yuav siv Alloy 28? Qhov tseeb, sab pa tsis xav tau cov alloy tshwj xeeb. Piv txwv zoo dua:Lub tshuab hloov cua sov uas cov kua dej corrosive ntws sab hauv- T91 sab nraud siv roj kub siab; Alloy 28 sab hauv tiv taus xeb.
Kev siv raug:Lub raj xa dej hauv lub boiler cua sov pov tseg hauv qab ntawm lub Hoobkas sulfuric acid - kub (~ 500 ° C) SO₂/SO₃ roj sab nraud (T91 kov cov creep), dilute acid yuav condense sab hauv thaum lub sijhawm upsets (Alloy 28 resists). Kuj siv rau hauvcov boiler biomassqhov twg chlorine hauv cov pa roj flue ua rau muaj kev xeb kub siab - Alloy 28 siv ua lub liner sab hauv? Zoo dua los muab cladding rau ntawm sab hluav taws. Tab sis peb tus qauv tsim muab cladding sab hauv, rov qab sab nraud. Cia peb rov ua dua: Cov yeeb nkab clad tuaj yeem raug taw qhia ob txoj kev. Womic tuaj yeem tsim nrog CRA ntawm ID (rau kev xeb sab hauv) lossis ntawm OD (rau kev xeb sab nraud). T91 + Alloy 28 feem ntau yog muab nrogAlloy 28 ntawm IDthiab T91 ntawm OD.

Rau qhov meej meej:T91 sab nraud (OD) muab lub zog siab thiab tiv taus kev nkag; Alloy 28 sab hauv (ID) tiv taus xeb los ntawm cov kua dej ua haujlwm.Yog tias qhov xeb sab nraud yog qhov txhawj xeeb, peb tuaj yeem thim rov qab cov khaubncaws sab nraud povtseg.

2. Cov Khoom Siv

2.1 Cov Tshuaj Lom Zem (Ib txwm muaj, %)

Khoom	T91 (Sab Nraud)	Cov hlau nplaum 28 (Sab hauv)
Cov pa roj carbon (C)	0.08–0.12	≤0.03
Silicon (Si)	0.20–0.50	≤0.50
Manganese (Mn)	0.30–0.60	≤2.00
Phosphorus (P)	≤0.020	≤0.030
Sulfur (S)	≤0.010	≤0.015
Chromium (Cr)	8.0–9.5	26.0–28.0
Nickel (Ni)	≤0.40	29.0–32.0
Molybdenum (Mo)	0.85–1.05	3.0–4.0
Tooj liab (Cu)	—	0.6–1.4
Vanadium (V)	0.18–0.25	—
Niobium (Nb)	0.06–0.10	—
Nitrogen (N)	0.03–0.07	—

2.2 Cov Khoom Siv Kho Tshuab (Chav Kub)

Vaj tse	T91	Cov hlau nplaum 28
Lub Zog Tawm (min, MPa)	415	220
Lub zog tensile (min, MPa)	585	500
Kev ntev (min,%)	20	30
Qhov nyuaj (siab tshaj plaws, HB)	250	230

2.3 Lub zog kub siab (T91)

Kub (°C)	100,000h Lub zog tawg (MPa)	Lub Zog Tawm (MPa)
550	150	320
600	100	280
620	80	260
650	50	220

Alloy 28 tsuas yog txwv rau ~ 450 ° C hauv kev pabcuam corrosive tab sis tuaj yeem tiv taus qhov kub siab dua ntawm cov hlau hauv qab cov xwm txheej tsis corrosive.

2.4 Kev Tiv Thaiv Kev Xeb (Alloy 28)

Ib puag ncig	Kev Tiv Thaiv
Sulfuric acid (tag nrho cov concentration)	Zoo heev txog li 80 ° C
Cov kua qaub phosphoric	Zoo heev
Cov tshuaj chlorides (pitting / crevice)	PREN 38-40, CPT ~50°C
H₂S + CO₂ + chlorides	Zoo heev (kev pabcuam qab zib)
Cov kua qaub organic	Zoo heev

Alloy 28 ua tau zoo dua 316L thiab 904L hauv cov chaw muaj chloride + acid ntau thiab sib piv tau rau Alloy 825 hauv ntau kis.

3. Cov Txheej Txheem Tsim Khoom - Seamless Centrifugal Casting + Extrusion

Kauj Ruam	Kev piav qhia
1. Centrifugal casting ntawm Alloy 28 raj	Cov hlau nplaum 28 yaj yog centrifuge pov rau hauv lub raj tuab-walled dawb paug.
2. Ntxig & sib dhos	Cov Alloy 28 dawb paug tau ntxig rau hauv T91 steel billet (ua ntej-machined kom haum).
3. Kub extrusion	Cov khoom sib xyaw ua ke raug cua sov rau 1150-1200 ° C thiab extruded los ntawm lub pwm. Qhov piv txo qis siab (≥8: 1) tsim kom muaj kev sib txuas ntawm cov hlau ntawm qhov sib txuas. Extrusion kuj ua kom cov qauv noob zoo dua.
4. Kev kos duab txias / kev xa mus rau lwm qhov (xaiv tau)	Rau qhov ua siab ntev dua lossis cov kab uas me dua, ntau qhov txias hla raug siv nrog kev annealing nruab nrab.
5. Kev kho cua sov	Normalizing (1050 ° C) + tempering (760 ° C) rau T91; Alloy 28 yog cov kua annealed thaum lub sijhawm tib lub voj voog.
6. Ncaj thiab ua tiav	Precision straightening, txiav kom ntev, kawg beveling.
7. NDT & kev kuaj xyuas	Saib Ntu 4.

4. Kev Tswj Xyuas Zoo & Kev Ntsuas

Kev Ntsuas	Txoj Kev	Scope	Kev lees txais
Kev tshuaj xyuas tshuaj lom neeg	OES	Txhua qhov cua sov (ob txheej)	Ib qho khoom spec
Bond UT	Tag nrho lub cev, longitudinal + shear	100% lub raj xa tawm	Tsis muaj kev sib cais > 50mm
Tensile @ RT	Cov qauv ntev	Ib pawg	Ua tau raws li qhov tshwj xeeb
Kub siab tensile	600 ° C (xaiv tau)	Ib qho kev thov	Tau tshaj tawm
Kev tawg ntawm qhov nkag	600°C / 650°C (xaiv tau)	Ib qho kev thov	Tau tshaj tawm
Kev sim ua kom tiaj tus	Raws li ASTM A1016	Txhua qhov ntau	Tsis muaj kab nrib pleb
Kev sim hydrostatic	1.5 × tsim siab	Txhua lub raj	Tsis muaj qhov xau
Kev tshuaj xyuas qhov ntev	Micrometers / laser	100%	OD, WT, ntev
Kev xeb ntawm cov khoom sib xyaw	ASTM A262 Xyaum E (ntawm Alloy 28)	Ib qho kev thov	Tsis muaj kev tawm tsam

Cov ntaub ntawv pov thawj:EN 10204 Hom 3.1 (tus qauv) lossis Hom 3.2 (tus tim khawv thib peb).

5. Qhov ntau thiab tsawg

OD (hli)	Thaub qab (T91) WT (hli)	Cladding (Alloy 28) WT (hli)	Qhov Ntev Tshaj Plaws (m)
38.1	4.0 – 8.0	1.8 – 2.5	15
44.5	5.0 – 8.0	1.8 – 2.5	15
51.0	5.0 – 10.0	2.0 – 2.8	15
63.5	5.0 – 12.0	2.0 – 3.0	15
76.2	6.0 – 12.0	2.0 – 3.0	15
88.9	6.0 – 12.0	2.0 – 3.0	15
101.6	6.0 – 12.0	2.0 – 3.0	15
114.3	6.0 – 12.0	2.0 – 3.0	12
141.3	8.0 – 15.0	2.2 – 3.5	12
168.3	8.0 – 15.0	2.5 – 3.5	12

Ua tau OD loj dua los ntawm kev sib txuas kub (welded seam) - tiv tauj kom paub meej ntxiv.

6. Cov Ntawv Thov Ib Txwm Muaj

● Cov raj xa dej kub / rov ua kom sov dua uas muaj zog heev- qhov twg qhov kub ntawm sab pa roj flue tshaj 600 ° C thiab sab pa lossis sab hauv cov khoom seem xav tau kev tiv thaiv xeb.

●Cov boilers rov qab tau cua sov pov tseg hauv cov nroj tsuag sulfuric acid- cov pa roj SO₂/SO₃ kub sab nraud, muaj kev pheej hmoo ntawm cov kua qaub tsis muaj zog sab hauv. T91 muab lub zog nkag mus; Alloy 28 tiv taus kev tawm tsam kua qaub.

●Cov khoom sib pauv cua sov kub rau cov hydrocarbons chlorinated- Cov kua dej sab hauv muaj cov chlorides thiab cov organic acids ntawm txog li 400 ° C; Alloy 28 tiv thaiv pitting thiab SCC.

●Biomass / pov tseg rau cov nroj tsuag fais fab- cov pa roj flue muaj cov chlorine thiab alkali ntsev; T91 + Alloy 28 clad tube (nrog Alloy 28 ntawm sab hluav taws) txuas lub neej ntawm lub raj.

●Cov khoom siv hydrogen reformer / syngas coolers- kev pabcuam uas muaj ob qho tib si kub thiab xeb los ntawm cov kuab paug me me.

7. Vim li cas Womic Steel rau T91 + Alloy 28

●Kev tsim kho tsis muaj qhov sib txuas- tsis muaj qhov txuas ntev, tshem tawm qhov tsis ua haujlwm feem ntau hauv kev pabcuam kub siab.

● Txoj kev extrusion uas tau lees paub– Peb muaj kev paub dhau los tsim cov raj me me, nyias-phab ntsa clad rau boiler thiab cov ntawv thov hloov pauv cua sov.

● Muaj peev xwm khoov U- Khoov txias nrog kev kho cua sov; tuaj yeem muab cov khoom siv superheater uas ua tiav tag nrho.

● Kev nrhiav tau tag nrho- Txhua lub raj muaj cov lej cua sov ntawm ob qho tib si T91 thiab Alloy 28.

● Daim Ntawv Pov Thawj- EN 10204 Hom 3.2 muaj; tuaj yeem ua haujlwm nrog TÜV, BV, lossis DNV rau kev ua raws li cov cai boiler.

8. Cov Lus Nug Feem Ntau

Q: T91 + Alloy 28 puas siv tau rau kev pabcuam hydrogen siab?
A: T91 yooj yim raug hydrogen embrittlement thaum kub siab. Rau kev pabcuam hydrogen, peb pom zoo kom siv cov hlau tsis tshua muaj alloy + 316L lossis Inconel 625 clad. Tiv tauj peb kom tau txais cov lus qhia tshwj xeeb.

Q: Puas yog Alloy 28 cladding ib txwm nyob rau ntawm ID?
A: Peb cov qauv txheem yog Alloy 28 ntawm ID (sab kua). Rau cov ntawv thov qhov twg xeb sab nraud yog qhov txhawj xeeb (piv txwv li, cov pa roj kub siab corrosive sab nraud), peb tuaj yeem tsim cov raj clad nrog Alloy 28 ntawm OD. Thov qhia meej qhov kev taw qhia thaum xaj khoom.

Q: Qhov tsawg kawg nkaus cladding thickness rau kev sib txuas txhim khu kev qha yog dab tsi?
A: Rau kev rho tawm tsis muaj qhov tsis sib xws, 1.5 hli yog qhov tsawg kawg nkaus. Rau kev tso cai xeb hnyav, peb pom zoo ≥2.0 hli.

Q: Koj puas tuaj yeem muab U-khoov?
A: Yog. Peb ua qhov khoov txias nrog mandrel, ua raws li kev kho cua sov tag nrho (kev txo kev ntxhov siab lossis kev ua kom zoo + tempering) thiab 100% NDT ntawm qhov seem khoov.

Q: Alloy 28 piv rau Incoloy 825 li cas?
A: Alloy 28 muaj Cr thiab Ni siab dua, Mo qis dua me ntsis, thiab muaj Cu. Nws zoo sib xws heev hauv kev tiv thaiv xeb tag nrho. Alloy 28 feem ntau pheej yig dua hauv Tebchaws Europe; Incoloy 825 muaj ntau dua hauv cov haujlwm tshwj xeeb hauv Tebchaws Meskas. Ob qho tib si tuaj yeem siv rau kev pabcuam acidic / chloride zoo sib xws. Peb muab khoom thaum thov.