ASTM A691 5Cr CL22 EFW Cov Yeeb Nkab Hlau rau Refinery thiab Power Service: Cov Lus Qhia, PWHT thiab Daim Ntawv Thov Duab Tshwj Xeeb

ASTM A691 5Cr CL22 EFW Cov Yeeb Nkab Hlau rau Chaw Tsim Khoom thiab Kev Pabcuam Fais Fab: Cov Lus Qhia, PWHT thiab Daim Ntawv Thov

Kev Piav Qhia Luv:

Womic Steeltsim cov yeeb nkab hlau ASTM A691 5Cr CL22 hluav taws xob-fusion-welded (EFW) rau kev pabcuam siab, kub siab qhov twg qhov chaw ua haujlwm xav tau kev tiv thaiv tshaj qhov 1.25Cr lossis 2.25Cr tuaj yeem muab. Qib 5Cr (4–6% chromium, 0.45–0.65% molybdenum) yog los ntawm ASTM A387 Gr.5 lub phaj siab thiab tau teev tseg rau cov chaw ua haujlwm refinery uas tuav cov dej sulfur-bearing thiab hydrogen-nplua nuj ntawm qhov kub siab. Chav Kawm 22 ua ke kev txo kev ntxhov siab tom qab vuam, kev kuaj xyuas radiographic ntawm cov leeg ntev, thiab kev sim hydrostatic. Nplooj ntawv no npog qib chemistry, nws txoj haujlwm hauv tsev neeg chrome-moly, lub luag haujlwm tseem ceeb ntawm kev kho cua sov tom qab vuam rau 5Cr yeeb nkab, thiab dab tsi yuav tsum qhia thaum xaj.

Cov lus tseem ceeb uas siv rau hauv nplooj ntawv no: ASTM A691 5Cr CL22, A691 5Cr yeeb nkab, 5Cr EFW yeeb nkab, chrome moly EFW yeeb nkab, A387 Gr.5 welded yeeb nkab, kub siab EFW yeeb nkab, ASTM A691 Chav Kawm 22, 5Cr vs 2.25Cr, 5Cr PWHT.

Xa email rau peb Cov Lus Qhia Txog Khoom

Cov Khoom Qhia Txog Khoom

Cov Cim Npe Khoom

ASTM A691 5Cr CL22 Txhais Li Cas

ASTM A691 npog cov yeeb nkab carbon thiab alloy steel, electric-fusion-welded nrog filler hlau ntxiv, ua los ntawm lub phaj siab-zoo, tsim nyog rau kev pabcuam siab ntawm qhov kub siab. Lub npe faib ua peb ntu.

Qib 5Crqhia txog lub phaj puag. Qib no sib raug rau ASTM A387 Gr.5, lub phaj hlau chromium-molybdenum alloy nrog cov ntsiab lus chromium nominal ntawm 5% thiab cov ntsiab lus molybdenum ntawm 0.5%. Cov ntsiab lus chromium siab dua piv rau 1.25Cr thiab 2.25Cr muab kev tiv thaiv zoo dua rau kev oxidation thiab, qhov tseem ceeb rau kev pabcuam refinery, kev tiv thaiv rau sulfidation thiab hydrogen tawm tsam ntawm qhov kub siab.

Chav Kawm 22txhais cov kev kho cua sov thiab kev sim. Chav Kawm 22 xav kom cov yeeb nkab raug txo kev ntxhov siab tom qab vuam, qhov txuas txuas ntev yuav tsum tau kuaj xyuas radiographically, thiab cov yeeb nkab tiav lawm yuav tsum tau kuaj hydrostatic. Rau 5Cr yeeb nkab, kev kho kev ntxhov siab tsis yog ib qho kev ua raws li txoj cai - nws yog qhov tseem ceeb rau kev ruaj khov ntawm cov hlau thiab yuav tsum tau tswj hwm hauv qhov kub tshwj xeeb.

EFWqhia txog txoj kev tsim khoom: cov hlau alloy phaj yog tsim rau hauv cov duab cylindrical, thiab cov kab sib txuas ntev yog welded siv submerged arc vuam nrog cov hlau ntxiv.

Cov Khoom Siv Tshuaj thiab Khoom Siv Kho Tshuab

Vim tias 5Cr khi rau A387 Gr.5 phaj, cov yeeb nkab tiav lawm cov tshuaj lom neeg thiab lub zog ua raws li tus qauv phaj ntawd.

Vaj tse	Tus nqi ib txwm muaj
Cov pa roj carbon (siab tshaj plaws)	0.15%
Manganese	0.30–0.60%
Phosphorus (max)	0.025%
Sulfur (max)	0.025%
Silicon (siab tshaj plaws)	0.50%
Chromium	4.00–6.00%
Molybdenum	0.45–0.65%
Lub Zog Tawm (min)	310 MPa
Lub zog tensile	515–690 MPa
Kev ntev (min)	18%

Cov tshuaj lom neeg thiab cov nqi kho tshuab yog sawv cev rau A387 Gr.5 phaj thiab tiav A691 5Cr yeeb nkab. Cov txiaj ntsig xeem tiag tiag ntawm daim ntawv pov thawj zeb qhia txog qhov kub tshwj xeeb thiab phaj siv. Chav Kawm 22 kev ntxhov siab txo qis tsis hloov pauv cov tshuaj lom neeg hauv paus.

Kev Sib Piv Qib: 2.25Cr vs 5Cr vs 9Cr

Cov qib chrome-moly hauv A691 tsim kev nce qib ntawm cov ntsiab lus chromium, txhua tus haum rau cov chaw kub siab dua.

Qib	Phaj Pib	Cov Ntsiab Lus Cr	Cov Ntsiab Lus Mo	Tus Tsav Tsheb Tseem Ceeb rau Kev Xaiv
2.25Cr	A387 Qib 22	2.00–2.50%	0.90–1.10%	Kev pabcuam hydrogen, lub zog fais fab nroj tsuag
5Cr	A387 Qib 5	4.00–6.00%	0.45–0.65%	Refinery sulfidation, cov txheej txheem kub siab
9Cr	A387 Qib 9	8.00–10.00%	0.90–1.10%	Kev oxidation hnyav, lub voj voog fais fab siab heev

5Cr raug xaiv tshaj 2.25Cr thaum cov txheej txheem muaj cov tshuaj sulfur uas yuav ua rau muaj sulfidation ntau dhau ntawm cov hlau chromium qis dua ntawm qhov kub ua haujlwm. Nws raug xaiv tshaj 9Cr thaum qhov kev pabcuam tsis xav tau cov ntsiab lus chromium siab dua ntawm 9Cr rau kev tiv thaiv oxidation, vim 5Cr pheej yig dua thiab muaj cov ntaub ntawv ntev dua hauv kev siv refinery.

Chav Kawm 22 thiab Lub Luag Haujlwm Tseem Ceeb ntawm PWHT rau 5Cr Yeeb Nkab

Chav Kawm 22 xav tau kev txo kev ntxhov siab tom qab vuam, kev kuaj xyuas tag nrho ntawm cov leeg ntev, thiab kev sim hydrostatic. Rau 5Cr yeeb nkab, kev kho cua sov tom qab vuam (PWHT) yog kauj ruam tseem ceeb tshaj plaws hauv cov txheej txheem tsim khoom.

5Cr-0.5Mo hlau rhiab heev rau kev tawg hauv thaj chaw kub-cuam tshuam yog tias vuam thiab txias tsis raug tswj kom zoo. Cov khoom siv xav tau PWHT los ua kom cov qauv tawv tsim thaum lub sijhawm vuam thiab kom txo cov kev ntxhov siab seem. Txawm li cas los xij, cov kev teeb tsa PWHT yuav tsum tau xaiv kom zoo. Kev tshawb fawb ntawm 5Cr-0.5Mo welded pob qij txha tau qhia tias PWHT hnyav - txawm tias ntawm qhov kub ntau dhau lossis rau lub sijhawm tuav ntau dhau - tuaj yeem ua kom cov txheej txheem puas tsuaj sai dua los ntawm kev txhawb nqa kev tsim carbide ntawm cov ciam teb noob, zoo ib yam li qhov tshwm sim thaum lub sijhawm ntev ntawm qhov kub siab. Qhov no txhais tau tias qhov kub thiab txias PWHT thiab lub sijhawm tuav yuav tsum tau teev tseg thiab tswj hwm hauv cov kev txwv tsim nyog rau cov tshuaj tshwj xeeb thiab phab ntsa tuab, tsis yog "kub li sai tau rau ntev li ntev tau."

Rau A691 5Cr yeeb nkab, qhov kub ntawm kev ntxhov siab feem ntau yog nyob rau hauv 650–760 ° C, nyob ntawm seb cov tshuaj lom neeg ntawm cov phaj tshwj xeeb thiab cov cai tsim qauv. Daim ntawv qhia PWHT yuav tsum muaj nyob rau hauv cov ntaub ntawv zoo kom tus neeg yuav khoom tuaj yeem txheeb xyuas tias kev kho mob poob rau hauv lub qhov rais teev tseg.

Qhov Loj thiab Kev Xaiv Tsim Khoom

Womic tsim cov yeeb nkab A691 5Cr CL22 siv LSAW nrog ib txoj kab ncaj lossis ob txoj kab ncaj. ASTM A691 nominally npog cov yeeb nkab 16 nti (400 mm) sab nraud txoj kab uas hla thiab loj dua nrog phab ntsa tuab txog li 3 nti (75 mm).

Cov Qauv	Ntau yam
Sab Nraud Txoj Kab uas hla	16″ txog 100″ (400 mm txog 2,540 mm)
Phab ntsa tuab	6 hli mus txog 75 hli (hnyav dua raws li qhov thov)
Ntev	6 m, 12 m tus qauv; txog li 18 m lossis 24 m yog tias thov
Txoj Kev Tsim Khoom	EFW / LSAW nrog cov hlau sau
Hom Seam	Ib txoj kab ncaj nraim los yog ob txoj kab ncaj nraim

Ib Txoj Kab Ncaj vs Ob Txoj Kab Ncaj

Ib txoj kab ncaj nraimsiv thaum ib lub phaj tuaj yeem dov mus rau hauv ib lub tog raj kheej puv. Ntawm Womic qhov no npog OD txog li 1,422 hli nrog phab ntsa tuab txog li 50.8 hli ntawm kab JCOE. Ib qho vuam ntev tsom mus rau kev tshuaj xyuas ntawm ib qho seam.

Ob chav ncaj seamsiv thaum txoj kab uas hla lossis phab ntsa tuab tshaj qhov uas ib lub phaj tuaj yeem tsim tau. Ob lub phaj raug dov ua ib nrab-lub tog raj kheej thiab txhua lub yog welded longitudinally. Qhov no npog OD txij li ntawm 1,200 hli txog 2,540 hli nrog phab ntsa tuab txog li 75 hli lossis ntau dua.

Cov ntawv thov rau A691 5Cr CL22 Yeeb Nkab

Qib 5Cr muaj feem cuam tshuam nrog kev pabcuam refinery qhov twg kev tiv taus sulfidation yog tus qauv xaiv cov khoom siv.

Cov chaw kho dua tshiab thiab cov chaw ua haujlwm visbreaking—5Cr-0.5Mo cov yeeb nkab hlau yog siv dav hauv cov chav kho dua tshiab thiab visbreaking ntawm cov chaw ua roj, qhov twg qhov kub ua haujlwm ntawm 400–500 ° C yog qhov ib txwm muaj thiab cov txheej txheem ntws muaj cov tshuaj sulfur.

Cov kab hloov pauv kub siabhauv cov chaw ua roj av uas nqa cov kua dej uas yuav ua rau muaj kev xeb ntau dhau ntawm cov hlau carbon lossis 2.25Cr piping

Cov kav dej fais fabqhov twg qhov kub ua haujlwm thiab cov pa roj flue xav tau kev tiv thaiv oxidation siab dua li 2.25Cr tuaj yeem muab tau

Cov chaw tsim khoom siv roj avkev tswj cov dej ntws uas muaj sulfur ntawm qhov kub thiab txias siab

Cov Ntaub Ntawv Zoo

Txhua qhov kev xa khoom ntawm A691 5Cr CL22 yeeb nkab los ntawm Womic Steel suav nrog:

● Daim ntawv pov thawj xeem EN 10204 3.1 nrog cov tshuaj lom neeg sib xyaw thiab cov txiaj ntsig ntawm kev xeem kho tshuab uas taug qab mus rau tus lej cua sov ntawm lub phaj

● Daim ntawv qhia txog kev kuaj mob radiographic rau qhov txuas weld

● Cov ntaub ntawv xeem hydrostatic

● Daim ntawv qhia txog kev kho cua sov tom qab vuam nrog qhov kub thiab txias, lub sijhawm tuav, thiab txoj kev txias

● Daim ntawv qhia txog kev soj ntsuam qhov ntev

● Kev tshuaj xyuas los ntawm lwm tus neeg muaj thaum thov (SGS, BV, TÜV)

Ntim thiab Xa Khoom

Cov kav dej muaj cov qhov kawg uas muaj cov hau yas los yog cov qhov kawg tiaj tiaj raws li tau teev tseg. Cov nplaim ntawm cov kav dej tau txais ib txheej tiv thaiv uas tsim nyog rau kev thauj mus los thiab kev khaws cia. Cov kav dej me thiab nruab nrab muaj cov hlua hlau; cov kav dej loj thiab cov kav dej phab ntsa hnyav raug xa ib leeg nrog lub thawv ntoo. Kev tshuaj xyuas ua ntej xa khoom los ntawm lwm tus neeg tuaj yeem npaj tau.

Cov Lus Nug Feem Ntau

Q: Qhov txawv ntawm 5Cr thiab 2.25Cr hauv ASTM A691 yog dab tsi?

5Cr siv A387 Gr.5 phaj nrog 4.00–6.00% chromium, thaum 2.25Cr siv A387 Gr.22 phaj nrog 2.00–2.50% chromium. Cov chromium ntau dua ntawm 5Cr muab kev tiv thaiv zoo dua rau sulfidation thiab oxidation ntawm qhov kub siab. 5Cr raug xaiv thaum cov txheej txheem ntws muaj cov tshuaj sulfur uas yuav ua rau muaj kev xeb tsis zoo ntawm 2.25Cr hlau, uas yog ib txwm muaj hauv kev kho dua tshiab thiab cov chav visbreaking.

Q: Vim li cas PWHT thiaj li tseem ceeb rau 5Cr yeeb nkab?

Cov hlau 5Cr-0.5Mo tsim cov qauv tawv, tawg-raug rau hauv thaj chaw kub-cuam tshuam thaum lub sijhawm vuam. PWHT ua rau cov qauv no sov thiab txo qhov kev ntxhov siab seem. Txawm li cas los xij, PWHT yuav tsum tau tswj hwm hauv qhov kub thiab lub sijhawm kom raug. Kev tshawb fawb tau qhia tias PWHT ntau dhau tuaj yeem txhawb kev tsim carbide ntawm cov ciam teb noob thiab ua kom nrawm dua qhov kev puas tsuaj, yog li cov kev kho cua sov yuav tsum tau teev tseg thiab txheeb xyuas, tsis yog tso rau ntawm lub tshuab txiav txim siab.

Q: Chav Kawm 22 txhais li cas rau A691 5Cr yeeb nkab?

Chav Kawm 22 txhais tau tias cov yeeb nkab raug kev ntxhov siab tom qab vuam, qhov txuas ntawm qhov vuam ntev tau txais kev kuaj xyuas radiographic tag nrho, thiab cov yeeb nkab tiav lawm raug kuaj hydrostatically. Rau cov yeeb nkab 5Cr, qhov kev ntxhov siab ntawm Chav Kawm 22 yog qhov tseem ceeb, thiab daim ntawv qhia PWHT yuav tsum tau saib xyuas ua ib feem ntawm pob ntawv pov thawj.

Q: Koj puas tuaj yeem muab A691 5Cr nrog kev sim cuam tshuam?

Yog. Kev kuaj qhov cuam tshuam Charpy V-notch yog qhov yuav tsum tau ua ntxiv raws li ASTM A691. Qhia meej qhov kub thiab txias ntawm kev kuaj, kev taw qhia ntawm cov qauv, thiab cov qauv lees txais hauv daim ntawv xaj yuav khoom. Kev kuaj qhov cuam tshuam rau cov yeeb nkab 5Cr tsis tshua muaj ntau dua li cov qib carbon steel kub qis, tab sis tuaj yeem npaj tau thaum cov lus qhia ntawm qhov project xav tau.

Q: Qhov kub siab tshaj plaws rau A691 5Cr yog dab tsi?

Qhov kub siab tshaj plaws ua haujlwm nyob ntawm tus qauv tsim tshwj xeeb thiab qhov corrosion ntawm cov txheej txheem ntws. Hauv kev pabcuam refinery, 5Cr piping feem ntau siv hauv 400–500 ° C. Saum toj no qhov ntau thiab tsawg no, oxidation thiab creep dhau los ua txwv, thiab cov qib chromium siab dua xws li 9Cr tej zaum yuav xav tau.

Q: Puas yog A691 5Cr zoo ib yam li A387 Gr.5?

Tsis yog raws nraim. A387 Gr.5 yog cov hlau phaj specification. A691 5Cr yog cov yeeb nkab specification uas siv A387 Gr.5 phaj ua cov khoom pib, tsim thiab welds nws rau hauv yeeb nkab, siv cov kev kho cua sov uas xav tau los ntawm chav kawm, thiab ua qhov kev sim tshwj xeeb. Cov yeeb nkab tiav lawm muaj chemistry thiab lub zog sib xws nrog A387 Gr.5, tab sis cov khoom tsim thiab cov txheej txheem sim yog tswj hwm los ntawm A691.

Tiv tauj Womic Steelrau ASTM A691 5Cr CL22 EFW cov lus hais txog cov yeeb nkab. Muab qhov ntev ntawm sab nraud, phab ntsa tuab, qhov ntau npaum li cas, qhov ntev, qhov kawg tiav, thiab lwm yam kev xav tau ntxiv rau kev kuaj xyuas. Peb yuav paub meej tias muaj thiab lub sijhawm ua tiav hauv ib hnub ua haujlwm.

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