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ASTM A312 TP304N Cov Yeeb Nkab Hlau Stainless Welded: Kev Muaj Peev Xwm Tsim Khoom & Cov Lus Qhia Txog Khoom Duab Tshwj Xeeb
  • ASTM A312 TP304N Cov Yeeb Nkab Hlau Stainless Welded: Kev Muaj Peev Xwm Tsim Khoom & Cov Lus Qhia Txog Khoom

ASTM A312 TP304N Cov Yeeb Nkab Hlau Stainless Welded: Kev Muaj Peev Xwm Tsim Khoom & Cov Lus Qhia Txog Khoom

Kev Piav Qhia Luv:

 

Womic Steel muab ASTM A312 TP304N welded stainless hlau yeeb nkab, ib tug nitrogen-strengthened stainless hlau 304 nrog siab yield zog (275 MPa) dua li tus qauv 304 thaum tswj tau zoo heev corrosion tsis kam, ductility, thiab weldability. Nitrogen ntxiv txhim kho lub zog thiab pitting tsis muaj upgraded rau duplex stainless hlau.

Tsim los ntawm ERW thiab EFW cov txheej txheem nrog cov kua annealing thiab pickled tiav. Muaj nyob rau hauv OD 6.35mm–1219mm (1/4″–48″), phab ntsa tuab 0.5mm–50mm, thiab ntev txog li 24m. Muab nrog daim ntawv pov thawj zeb, kev sim hydrostatic, kev tshuaj xyuas UT, thiab kev kho kom haum rau qhov kawg.

Cov ntawv thov:
Cov hlab ntsha siab, kev ua tshuaj lom neeg, cov platforms offshore, cov khoom sib pauv cua sov, cov tshuab hydraulic, kev kho dej, cov chaw ua ntawv, thiab cov kav dej kev lag luam siab.

Tus Qauv & Qib:
ASTM A312 TP304N / ASME SA312 / EN 10217-7 1.4315 (AISI 304N)


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 thiab xa khoom thoob ntiaj teb nrog ntau tshaj 20 xyoo ntawm kev txawj ntse hauv kev tsim cov khoom siv tubular stainless hlau. Peb lub chaw tsim khoom tshwj xeeb TP304N welded yeeb nkab siv ntau yam thev naus laus zis vuam nrog kev tswj cua sov kom tswj tau cov ntsiab lus nitrogen hauv cov hlau vuam:

  • 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 kev teeb tsa zoo tshaj plaws kom khaws cov nitrogen. Zoo tagnrho rau cov kav dej me mus rau nruab nrab txoj kab uas hla TP304N rau kev siv siab thiab cov qauv.
  • 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 sau hla, siv cov hlau sib phim (ER304N lossis ER308 nrog nitrogen).
  • LSAW / SAWL Kab rau Stainless: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 TP304N dov.

Txhua lub kav dej TP304N uas tau vuam lawm yuav raug annealing (kev kho cua sov) ntawm 1040-1120 ° C ua raws li kev quenching dej kom khaws cov nitrogen hauv cov tshuaj khov thiab rov qab tiv thaiv xeb, ua raws li kev pickling thiab passivation.

Cov Ntawv Pov Thawj Zoo & Kev Ua Raws Cai:

  • ISO 9001: 2015 Daim 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
  • ASME Boiler thiab Pressure Vessel Code (Tshooj VIII, Div. 1) thaum thov

Womic Steel muab cov kav dej TP304N welded rau ntau tshaj 40 lub tebchaws thoob plaws kev lag luam siab, kev tsim kho, thiab tshuaj lom neeg.

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: 406–1524 hli OD × 6.0–50 hli WT × ≤ 18m
  • Cov kev xaiv tiav: Annealed thiab pickled, ci annealed, polished (180 # txog 320 #)

2. ASTM A312 TP304N: Cov Khoom Siv Sib xyaw & Cov yam ntxwv ua tau zoo

ASTM A312 TP304N yog ib hom hlau stainless 304 uas muaj nitrogen ua kom muaj zog. Nitrogen (0.10-0.16%) muab kev txhawb zog rau cov kua khov, ua rau lub zog tsim tau kwv yees li 35% thaum tseem ua kom nws cov khoom siv tau yooj yim, tawv, thiab tiv taus xeb zoo heev. Qhov no ua rau cov phab ntsa nyias dua rau tib qib siab, txo qhov hnyav thiab tus nqi.

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

Khoom TP304N (ASTM A312) TP304 (rau kev sib piv)
C ≤ 0.08 ≤ 0.08
Mn ≤ 2.00 ≤ 2.00
P ≤ 0.045 ≤ 0.045
S ≤ 0.030 ≤ 0.030
Si ≤ 1.00 ≤ 1.00
Cr 18.0 – 20.0 18.0 – 20.0
Ni 8.0 – 11.0 8.0 – 11.0
N 0.10 – 0.16 ≤ 0.10
Fe Qhov Nyiaj Tshuav Qhov Nyiaj Tshuav

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

Vaj tse TP304N TP304
Lub Zog Tawm (qis tshaj, 0.2% offset) 275 MPa (39,900 psi) 205 MPa (30,000 psi)
Lub zog Tensile (min) 550 MPa (79,800 psi) 515 MPa (74,700 psi)
Kev ncua ntev (min, 50mm gauge) 35% 40%
Qhov nyuaj (siab tshaj plaws) 90 HRB 90 HRB

Cov Khoom Siv Lub Cev:

  • Qhov Ceev: 7.93 g/cm³
  • Modulus ntawm Elasticity: 200 GPa (29 × 10⁶ psi)
  • Kev Ua Kub: 16.2 W/m·K ntawm 100°C
  • Cov Coefficient ntawm Thermal Expansion: 17.2 × 10⁻⁶/°C (20-100°C)

Kev Tiv Thaiv Kev Xeb:

  • Zoo ib yam li 304 hauv feem ntau ib puag ncig (zoo tiv taus cov kua qaub oxidizing, cov kua qaub organic)
  • Kev tiv thaiv pitting zoo dua me ntsis vim yog nitrogen (PREN ≈ 19-20 vs 18 rau 304)
  • Zoo heev tsis kam rau intergranular corrosion tom qab vuam (thaum cov tshuaj annealed kom zoo)
  • Tsis haum rau kev pabcuam chloride saum qhov kub thiab txias (siv 316N lossis duplex rau chlorides)

Cov txiaj ntsig tseem ceeb tshaj 304:

  • Lub zog ua kom cov khoom loj dua 35% ua rau cov phab ntsa nyias dua (txo qhov hnyav 20-25%)
  • Kev ntxhov siab siab dua ib qho ASME Tshooj VIII rau cov hlab ntsha siab
  • Kev sib piv ntawm weldability thiab formability
  • Kev tiv thaiv pitting zoo dua me ntsis

3. Kev Ua Raws Li Qhov Ntev thiab Cov Qauv

Khoom Cov Lus Qhia Tshwj Xeeb
Tus Qauv ASTM A312 / ASME SA312 (kuj yog A358, A249)
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 24m
Xaus tiav Qhov Kawg Plain (PE), Qhov Kawg Beveled (BE)
Qhov Chaw Tiav Annealed & Pickled, Bright Annealed, Polished
Kev kam rau siab OD: ±0.5% lossis ±3.2 hli; WT: ±12.5% ​​(ib qho ASTM A999); Ntev: +50 hli / -0 hli

 

4. Qhov Loj & Cov Lus Qhia Tshwj Xeeb - ASTM A312 TP304N Welded Stainless Steel Pipe

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 10S 2.11 1.00 6m Txoj kab hydraulic
3/4″ 26.7 10S 2.11 1.28 6m Kev siv tshuaj lom neeg
1″ 33.4 10S 2.77 2.09 6m Dej siab
1-1/2″ 48.3 10S 2.77 3.11 6m Cov txheej txheem
2″ 60.3 10S 2.77 3.93 6m / 12m Lub thawv siab
3″ 88.9 10S 3.05 6.46 6m / 12m Cov qauv kem
4″ 114.3 10S 3.05 8.37 6m / 12m Cov khoom siv hloov cua sov
6″ 168.3 10S 3.40 13.8 6m / 12m Lub tshuab ua ntawv
8″ 219.1 10S 3.76 20.0 12m Offshore topside
10″ 273.0 10S 4.19 27.8 12m Kev txhawb nqa ntawm cov qauv
12″ 323.9 10S 4.57 36.0 12m Lub taub hau tseem ceeb
16″ 406.4 10S 4.78 47.4 12m Lub plhaub ntawm lub nkoj siab
20″ 508.0 10S 5.54 68.6 12m Txoj kab uas hla loj
24″ 609.6 10S 6.35 94.4 12m Lub tank cia khoom

Cov qhov ntev tshwj xeeb sab nraum cov ntau yam no muaj. TP304N tso cai rau cov phab ntsa nyias dua 304 rau tib qhov ntsuas siab.

5. Cov Qauv Hlau Stainless Hlau & Qib Uas Womic Steel Tsim

Tus Qauv Cov Qib Hlau Daim Ntawv Thov Ib Txwm Muaj Txheej Txheem Vuam
ASTM A312 TP304N, TP304, TP304L, TP316N, TP316 Kev pabcuam xeb, siab ERW/EFW/LSAW
ASTM A358 TP304N, TP304, TP316 Kev sib txuas hluav taws xob welded EFW
ASTM A249 TP304N Boiler, superheater, cua sov exchanger ERW/EFW
ASTM A312 TP304L, TP316L Kev pabcuam xeb dav dav ERW/EFW/LSAW
EN 10217-7 1.4315 (304N) Lub hom phiaj ntawm kev siab SAW/ERW

Kev Siv:Cov hlab ntsha siab, cov khoom sib xyaw, cov kav dej hauv hiav txwv, kev ua tshuaj lom neeg, cov khoom sib pauv cua sov, cov khoom siv ntawv.

6. Cov Txheej Txheem Tsim Khoom - Cov Yeeb Nkab Hlau Stainless Steel Welded (ERW, EFW, LSAW)

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

1. Kev Tshuaj Xyuas Khoom Siv Raw (Strip / Coil):Daim kab xev TP304N tau txheeb xyuas seb puas muaj cov khoom xyaw (Cr 18-20%, Ni 8-11%, N 0.10-0.16%). Txhua lub kauj muaj tus lej kub tshwj xeeb.

2. Kev Tshem Tawm & Kev Sib Tw

3. Kev Txiav Ntug Ntug

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

5. Kev Vuam Zaus Siab:Siv cua sov zoo tshaj plaws (≤ 1.5 kJ/mm2) kom khaws cov nitrogen. Tej zaum yuav xav tau kev khiav ceev dua.

6. Kev Sib Dhos Seam:Induction annealing ua raws li dej quenching.

7. Kev Loj thiab Kev Ncaj Ncees

8. Txiav kom ntev

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

10.Kev Kho Mob Kub (Tag Nrho Cov Yeeb Nkab):1040-1120 ° C, dej tua. Tseem ceeb rau kev yaj cov nitrides thiab rov qab kho cov khoom.

11.Kev Ntsuas Hydrostatic

12.Kev Ua Kua Txob thiab Kev Ua Kom Tsis Txhob Mob

13.PMI (XRF) & kev txheeb xyuas Nitrogen (yog tias tau teev tseg)

14.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):

1. Kev Npaj Phaj:TP304N phaj, cov npoo beveled (X bevel).

2. Kev Tsim Dov

3. Kev Sib Txuas Tack

4. TIG (GTAW) Root Pass:Cov khoom sib phim (ER308 lossis ER304N), argon backing gas.

5. Daim Ntawv Sau & Lub hau ntawm SAW:SAW ntau zaus nrog kev tswj cua sov nkag (≤ 1.8 kJ/mm2), interpass ≤ 150°C.

6. Sab Hauv Weld

7. Kev Ntsuas Xoo Hluav Taws Xob 100%(ib qho ASTM A358)

8. Kev daws teeb meem Annealing:Kev kho cua sov tag nrho cov yeeb nkab (1040-1120 ° C), dej tua.

9. Kev Ua Kua Txob thiab Kev Ua Kom Tsis Txhob Mob

10.Kev Ntsuas Hydrostatic

11.Kev Tshuaj Xyuas Qhov Ntev & Kev Cim

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

  • UOE lossis JCOE tsim los ntawm TP304N phaj
  • Ob Sab SAW vuam
  • Kev daws teeb meem tag nrho tom qab vuam

Cov Kev Xav Tshwj Xeeb rau TP304N:

  • Cov ntsiab lus ntawm nitrogen yuav tsum tau tswj kom tsis txhob muaj nitride precipitation
  • Qhov kub ntawm kev ua kom cov kua kub siab dua (1080-1120 ° C) kom yaj cov nitrides
  • Yuav tsum tau tso dej kom qhuav kom khaws cov nitrogen hauv cov kua khov
  • Cov khoom siv vuam yuav tsum muaj cov ntsiab lus nitrogen sib xws (ER308L nrog N ntxiv)
b35784dc-660f-46c6-a1a9-dca3f174f62f

7. Kev Tswj Xyuas Zoo & Cov Txheej Txheem Ntsuas rau ASTM A312 TP304N Welded Stainless Steel Pipe

Theem Txoj Kev Tshuaj Xyuas Lub Hom Phiaj
Cov Khoom Siv Raw Kev Tshuaj Xyuas Tshuaj (OES + Kev Kub Hnyiab rau N) Xyuas kom tseeb tias TP304N (N 0.10-0.16%, Cr 18-20%, Ni 8-11%)
Cov Khoom Siv Raw Kev Ntsuas Tensile Xyuas kom tseeb tias qhov tawm los ≥ 275 MPa, tensile ≥ 550 MPa
Cov Khoom Siv Raw Qhov nyuaj ≤ 90 HRB
Nyob rau hauv-Txheej Txheem Kev Saib Xyuas Kub ≤ 1.8 kJ / hli
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 (qhov chaw lossis 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 ≤ 90 HRB
Tom qab Annealing Solution Kev Txheeb Xyuas Nitrogen (yog tias teev tseg) Paub meej tias cov ntsiab lus N hauv cov yeeb nkab tiav lawm
Cov Yeeb Nkab Tiav Lawm Kev Ntsuas Hydrostatic Kev ua siab ncaj ncees
Cov Yeeb Nkab Tiav Lawm Kev Sib Nraus / Kev Coj Khoov Kev yoog tau
Cov Yeeb Nkab Tiav Lawm PMI (XRF) Paub meej qib (Cr, Ni)
Cov Yeeb Nkab Tiav Lawm Kev Pom thiab Kev Cim Kev taug qab tau

Kev Xeem Xaiv Tau:

  • Kev sim tensile kub siab (yog tias xav tau rau kev tsim qauv)
  • Kev kuaj xeb ntawm qhov pitting (ASTM G48) rau kev pabcuam tseem ceeb
  • Kev sim xeb intergranular (ASTM A262 Xyaum E)

8. Cov Ntawv Thov Tseem Ceeb - ASTM A312 TP304N Welded Stainless Steel Pipe

1. Cov thoob dej siab thiab cov thoob dej cia khoom:Kev ntxhov siab siab dua ib qho ASME Tshooj VIII tso cai rau cov phab ntsa nyias dua (txuag tau 20-25% qhov hnyav) piv rau 304.

2. Cov khoom siv hauv cov chaw ua haujlwm corrosive:Cov kev txhawb nqa sab saum toj ntawm lub platform offshore, cov qauv ntawm cov nroj tsuag tshuaj, cov ncej ntawm cov nroj tsuag ua zaub mov. Lub zog siab dua ua rau qhov loj ntawm seem txo qis.

3. Cov kav dej sab saum toj ntawm Offshore platform:Cov txheej txheem kav dej uas xav tau qhov ntsuas siab dua tab sis tsis tas yuav tsum muaj duplex. TP304N muab lub zog nruab nrab.

4. Kev ua tshuaj lom neeg (cov txheej txheem siab dua):Cov kav dej nkag/tawm ntawm lub reactor, cov kab hloov pauv siab uas 304 tsis txaus tab sis 316L tau teev tseg ntau dhau.

5. Cov plhaub thiab cov raj xa dej kub sib pauv:Lub zog ntawm sab plhaub tuaj yeem nce ntxiv yam tsis ua rau lub plhaub tuab. Cov raj tuaj yeem muaj cov phab ntsa nyias dua rau kev hloov pauv cua sov zoo dua.

6. Cov khoom siv ua ntawv:Cov kab tshuab zom zaub mov, cov kav dej npaj khoom noj uas muaj zog dua tiv taus kev yaig-xeb.

7. Cov kav dej ua npias thiab mis nyuj:Cov tshuab CIP siab (Clean-In-Place) thiab cov kab khoom ua haujlwm ntawm 10-15 bar.

8. Cov kab hydraulic:Cov cuab yeej siv thiab cov kab tswj hwm xav tau qhov siab tawg siab dua 304.

9. Lub cev twj tso kua mis thiab lub valve:Cov khoom siv cam khwb cia lossis tsim ua (hloov 304 nrog lub zog siab dua).

10.Cov tshuab kho dej siab:Cov kab rov qab osmosis pub (qhov ntsuas siab dua).

11.Cov qauv vaj tse:Qhov twg lub zog siab dua tso cai rau cov profiles nyias dua (hanrails, supports).

9. Ntim & Xa Khoom - ASTM A312 TP304N Welded Stainless Steel Pipe

Ntim:

  • Kev tiv thaiv xeb:Cov kav dej uas muaj roj los yog daim ntawv VCI. Rau cov khoom noj/ua npias, tsis muaj roj seem (yas qhwv).
  • Cov hau kawg:Cov kaus mom yas rau cov qhov kawg beveled.
  • Kev Sib Txuas (Cov kab uas hla me me):Cov khoom siv nrog cov hlua hlau thiab cov ntawv sib txuas.
  • Kev ntim khoom ib leeg (Cov kab uas hla loj):Yas zaj duab xis qhwv.
  • Cov thawv ntoorau cov ntawv thov tseem ceeb.

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, daim ntawv qhia txog hydrotest, daim ntawv qhia txog eddy current/UT, daim ntawv qhia PMI, daim ntawv qhia txog qhov ntev, daim ntawv teev cov khoom ntim, COO.

10. Cov txiaj ntsig ntawm Womic Steel & FAQ - ASTM A312 TP304N Welded Stainless Steel Pipe

Vim li cas thiaj koom tes nrog Womic Steel rau TP304N Welded Pipe?

  • Qhov Loj Tag Nrho: ERW 1/4″ – 24″, EFW/LSAW 8″ – 60″.
  • Kev daws teeb meem tag nrho tom qab vuam (1040-1120 ° C, dej quench).
  • Kev khaws cia nitrogen tau txheeb xyuas los ntawm kev tshuaj xyuas kev kub hnyiab.
  • Lub zog siab dua tso cai rau cov phab ntsa nyias dua - txuag qhov hnyav ntawm 20-25% dhau 304.
  • Lub sijhawm ua khoom sib tw: 25-35 hnub rau ERW, 35-50 hnub rau EFW / LSAW.
  • Daim ntawv pov thawj thoob ntiaj teb: ISO 9001, PED (CE), EN 10204 Hom 3.2.

Cov Lus Nug Feem Ntau (FAQ) - ASTM A312 TP304N Welded Pipe

Q: Qhov zoo ntawm TP304N dua li tus qauv 304 yog dab tsi?
A: TP304N muaj zog dua 35% (275 MPa vs 205 MPa) thaum tswj kev tiv thaiv xeb, ductility, thiab weldability zoo sib xws. Qhov no tso cai rau cov neeg tsim qauv siv cov phab ntsa nyias dua rau cov hlab siab thiab cov kav dej, txo qhov hnyav los ntawm 20-25% thiab txo cov nqi khoom siv rau tib qhov ntsuas siab. Rau cov ntawv thov kev tsim kho, qhov loj me me tuaj yeem siv tau.

Q: TP304N puas kim dua 304?
A: Me ntsis, vim yog nitrogen alloying thiab kev tswj cov khoom sib xyaw nruj dua. Txawm li cas los xij, qhov hnyav txuag (20-25% phab ntsa nyias dua) feem ntau ua rau cov nqi khoom siv qis dua rau cov ntawv thov uas muaj siab. Rau cov ntawv thov kev tsim kho qhov twg lub zog yog qhov tseem ceeb, qhov hnyav txo qis yuav them taus tus nqi siab dua.

Q: TP304N puas tuaj yeem vuam tau yam tsis poob nitrogen?
A: Yog, nrog rau cov kev ntsuas vuam kom raug (qhov nkag cua sov tsawg, ≤ 1.8 kJ / mm) thiab cov hlau filler tsim nyog (ER308 lossis ER304N). Cov nitrogen khaws cia rau hauv cov hlau vuam feem ntau yog 80-90% ntawm cov hlau puag. Womic's ERW txheej txheem siv cov vuam zaus siab uas txo qis kev poob nitrogen. Rau cov ntawv thov tseem ceeb, kev daws teeb meem tom qab vuam rov qab kho cov nitrogen faib tawm.

Q: TP304N puas xav tau kev daws teeb meem tom qab vuam?
A: ASTM A312 xav tau kev kho kom sov rau cov yeeb nkab vuam. Rau TP304N, kev kho kom sov ntawm 1040-1120 ° C ua raws li kev tso dej kom yaj cov nitrides uas yuav tau tsim thaum lub sijhawm vuam thiab rov qab kho qhov tsis kam xeb thiab cov khoom siv kho tshuab. Womic ua kev kho kom sov rau txhua lub yeeb nkab vuam TP304N.

Q: TP304N puas haum rau kev pabcuam dej hiav txwv?
A: Tsis pom zoo. TP304N muaj kev tiv thaiv pitting zoo ib yam li 304 (PREN ≈ 19-20). Rau cov dej hiav txwv lossis cov chaw muaj chloride ntau, siv 316N (nrog Mo) lossis duplex stainless hlau. TP304N yog rau cov ntawv thov uas xav tau lub zog siab dua hauv cov chaw tsis muaj chloride lossis cov chaw muaj chloride tsawg.

Q: Qhov kev ntxhov siab tso cai rau TP304N hauv ASME Seem VIII yog dab tsi?
A: Thaum sov li chav tsev, qhov kev ntxhov siab uas tso cai rau TP304N yog kwv yees li 137 MPa (20,000 psi) vs 115 MPa (16,700 psi) rau 304 - kwv yees li 19% siab dua. Cov nqi tiag tiag nyob ntawm qhov kub thiab txias; saib ASME Seem II, Ntu D. Cov neeg tsim qauv yuav tsum siv cov nqi kev ntxhov siab raug rau qib tshwj xeeb.

Q: Lub sijhawm ua khoom siv rau TP304N welded stainless hlau yeeb nkab yog dab tsi?
A: 25-35 hnub rau ERW (cov kav me mus rau nruab nrab), 35-50 hnub rau EFW/LSAW (cov kav loj). TP304N yog qib txheem rau ntau lub Hoobkas, yog li lub sijhawm ua khoom zoo ib yam li 304.

Q: TP304N puas siv tau rau kev pabcuam kub siab (saum toj no 500 ° C)?
A: TP304N lub zog thaum kub siab zoo dua 304 vim yog cov kua nitrogen ua kom muaj zog. Txawm li cas los xij, rau kev pabcuam ntev tshaj 550 ° C, cov qib nrog cov pa roj carbon ntau dua (304H) lossis cov qib tiv taus kev nkag (321H, 347H) yog qhov zoo dua. TP304N zoo tshaj plaws rau qhov kub nruab nrab (< 425 ° C) qhov twg xav tau lub zog.

11. Cov Lus Qhia Txog Qhov Project - Offshore Platform Topside Piping & Structural Supports (Brazil)

Lub Tebchaws:Brazil (Campos Basin, offshore Rio de Janeiro)
Tus Qauv & Qib:ASTM A312 TP304N (welded)
Qhov Loj & Qhov Ntau:

  • OD 219.1mm (8″) × Schedule 10S (3.76mm WT) – 1,200 meters (kwv yees li 28 tons) – EFW txheej txheem
  • OD 168.3mm (6″) × Schedule 10S (3.40mm WT) – 1,800 meters (kwv yees li 22 tons) – ERW txheej txheem
  • OD 114.3mm (4″) × Schedule 10S (3.05mm WT) – 2,500 meters (kwv yees li 20 tons) – ERW txheej txheem
  • OD 60.3 hli (2″) × Schedule 10S (2.77 hli WT) – 3,000 meters (kwv yees li 12 tons) – ERW txheej txheem
  • OD 406.4mm (16″) × Schedule 10S (4.78mm WT) – 300 meters (kwv yees li 12 tons) – EFW txheej txheem (cov kem qauv)

Tag Nrho:8,800 meters (8.8 km), kwv yees li 94 tons

Cov Lus Qhia:ASTM A312 TP304N kua annealed thiab pickled, beveled kawg. Hydrostatic kev kuaj xyuas. 100% UT rau EFW kav dej, eddy tam sim no rau ERW. PMI ntawm txhua lub kav dej. Tensile kev kuaj xyuas (cov txiaj ntsig ≥ 275 MPa, ua tiav 310-340 MPa; tensile ≥ 550 MPa, ua tiav 580-620 MPa). Charpy cuam tshuam ntawm -20 ° C (min 27J, ua tiav 100-150J). Intergranular corrosion kev xeem ib ASTM A262 Xyaum E (dhau). Kev tshuaj xyuas thib peb los ntawm DNV Brazil.

Daim Ntawv Thov:Cov kav dej ua haujlwm sab saud thiab cov kev txhawb nqa rau lub platform tsim khoom hauv hiav txwv hauv Campos Basin. Cov kav dej ua haujlwm tau tsim dej thiab roj av qis ntawm 50-80 ° C nrog cov chloride tsawg (dej kho tau). Cov kev txhawb nqa yog rau cov khoom siv skids thiab cov khib yeeb nkab. Lub platform xav tau kev txo qhov hnyav kom ntev nws lub neej kev pabcuam (txhawj xeeb txog kev qaug zog). TP304N tau raug xaiv rau nws lub zog siab dua 35%, tso cai rau cov phab ntsa nyias dua (Schedule 10S es tsis yog Schedule 40S) rau ob qho tib si kav dej thiab cov khoom siv.

Cov Ntsiab Lus Txog Kev Tsim Kho:Lub platform thawj zaug yog tsim los rau 304 piping. Los ntawm kev hloov kho mus rau TP304N thiab txo cov phab ntsa tuab ntawm Schedule 40S (4.55-8.18mm) mus rau Schedule 10S (2.77-4.78mm), pab pawg engineering tau ua tiav qhov hnyav txo 45% ntawm cov kav dej thiab txo 30% ntawm cov kev txhawb nqa - tag nrho qhov hnyav txuag tau 35 tons (27% ntawm qhov hnyav thawj). Qhov no tso cai rau lub platform kom nyob hauv nws cov peev nyiaj qhov hnyav sab saud.

Cov Kev Sib Tw thiab Kev Dais Teeb Meem:

  • Txo qhov hnyav yam tsis muaj kev cuam tshuam rau qhov ntsuas siab– TP304N lub zog siab dua tso cai rau cov phab ntsa nyias dua raws li ASME B31.3. Rau 8″ piping, Schedule 10S (3.76mm) hloov Schedule 40S (8.18mm), txo qhov hnyav los ntawm 54%. Womic muab daim ntawv pov thawj qhov ntev thiab cov ntawv qhia kev sim siab. Kev xeem hydrostatic ntawm 3.0 MPa dhau (kev tsim siab 1.8 MPa, kev sim siab 2.7 MPa).
  • Kev sib phim ntawm lub zog ntawm cov hlau vuam– ERW thiab EFW vuam hlau yuav tsum muaj lub zog sib npaug li cov hlau puag. Womic optimized ERW parameters kom ua tiav weld joint efficiency ntawm 95% (tensile strength 560 MPa vs base 590 MPa). EFW welds siv ER308 filler tau ua tiav 100% kev sib koom ua ke. Tag nrho cov kev xeem tensile weld dhau.
  • Kev tiv thaiv xeb ntawm qhov tuab ntawm phab ntsa txo qis– Cov phab ntsa nyias dua muaj qhov tso cai xeb tsawg dua. Cov dej tsim tawm yog cov chloride tsawg (< 50 ppm) nrog pH 6.5-7.5, yog li tus nqi xeb qis. TP304N muaj kev tiv thaiv pitting zoo dua me ntsis dua li 304 vim yog nitrogen. Womic tau ua qhov kev sim pitting ASTM G48 (24 teev ntawm 22 ° C) - tsis muaj pitting. Cov neeg siv khoom lees txais.
  • Kev tsim qauv txhawb nqa siv TP304N– Cov kem qauv 16″ siv Schedule 10S (4.78mm) es tsis yog Schedule 40S (9.53mm). Kev tshuaj xyuas cov khoom siv kawg (FEA) tau lees paub tias phab ntsa nyias dua nrog TP304N lub zog siab dua muab lub peev xwm thauj khoom sib npaug. Womic muab kev kam rau siab ncaj ≤ 0.15% rau kev ruaj khov ntawm kem.
  • Cov txheej txheem vuam teb rau TP304N– Pab neeg saib xyuas platform xav tau los hloov cov kav dej thaum lub sijhawm teeb tsa. Womic tau muab WPS siv GTAW nrog ER308 filler, cua sov nkag ≤ 1.8 kJ/mm, interpass ≤ 150°C. 20 daim coupon weld dhau RT, PT, thiab tensile testing.
  • Kev thauj mus rau Campos Basin– Cov kav dej xa los ntawm Shanghai mus rau Rio de Janeiro, tom qab ntawd mus rau lub platform hauv hiav txwv los ntawm lub nkoj xa khoom. DNV tau tshuaj xyuas cov kav dej thaum thauj khoom. Tag nrho 94 tons tau xa tuaj hauv ob qho kev xa khoom dhau 5 lub lis piam.

Qhov Tshwm Sim:Cov kav dej sab saud thiab cov kev txhawb nqa ntawm lub platform tau teeb tsa rau hauv Q2 2024. Qhov hnyav txo tau 35 tons tau tso cai rau lub platform kom ua tau raws li nws qhov hnyav sab saud yam tsis tas yuav tsum tau txhawb nqa cov qauv. Tom qab 12 lub hlis ntawm kev ua haujlwm, kev tshuaj xyuas tsis pom muaj kev xeb lossis kev sib txuas tsis zoo. Tus neeg teb xov tooj npaj yuav siv TP304N rau kev hloov kho platform yav tom ntej kom txo qhov hnyav thiab txuas lub neej ntawm cov khoom. Womic Steel tam sim no yog tus neeg muab khoom tsim nyog rau tus neeg teb xov tooj no cov kev xav tau ntawm cov kav dej stainless hlau.

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

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Womic Steel - Koj tus khub txhim khu kev qha rau ASTM A312 TP304N welded stainless hlau kav rau cov hlab ntsha siab, cov platforms offshore, cov ntawv thov kev tsim kho, thiab cov tshuab tshuaj lom neeg siab thoob ntiaj teb.

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