ASTM A671 Fais Fusion Welded (EFW) yeeb nkab
Lub ntsiab lus tseem ceeb
Standard specification rauhluav taws xob-fusion-welded steel yeeb nkabtsim nrogfiller hlau ntxiv, fabricated los ntawmsiab hlab ntsha zoo daim hlau. ASTM A671 yog tsim rausiab - kev pabcuam siab ntawm atmospheric thiab qis dua, ua rau nws yog qhov tseem ceeb rau loj - txoj kab uas hla piping nyob rau hauv lub hwj chim tsim, petrochemical, thiab industrial infrastructure siv .
Lub npe piav qhia
| Ib feem | Lub ntsiab lus |
|---|---|
| ASTM | ASTM International |
| A671 | Tus qauv specification tooj rau hluav taws xob -fusion-welded steel yeeb nkab rau atmospheric thiab qis kub |
| Hluav taws xob Fusion Welded (EFW) | Cov txheej txheem tsim khoom - cov yeeb nkab tsim los ntawm phaj thiab welded longitudinally los yog kauv siv hluav taws xob arc vuam nrogntxiv cov hlau nplaum |
| Qhov Tseem Ceeb | Sib txawv ntawm ERW (tsis muaj cov hlau muab tub lim) - EFW sivfiller hlauthaum vuam |
Cov yam ntxwv tseem ceeb ntawm ASTM A671 EFW Pipe
| Feature | Kev piav qhia |
|---|---|
| Khoom siv | Fabricated los ntawmsiab hlab ntsha zoo daim hlau(xws li ASTM A285, A515, A516, A537, A517) |
| Kev tsim khoom | Hluav taws xob Fusion Welded (EFW)- feem ntauLongitudinal Submerged Arc Welded (LSAW)los yogOb chav Submerged Arc Welded (DSAW)nrog muab tub lim ntxiv |
| Daim ntawv thov tseem ceeb | Siab - kev pabcuam siab ntawmatmospheric thiab qis kub |
| Txoj kab uas hla | 16 nti (400 mm) thiab loj duanpe |
| Phab ntsa Thickness | 1/4 nti (6 mm) thiab ntau dua |
| Ntev | Feem ntau 6 m thiab 12 m, kho tau raws li qhov yuav tsum tau ua |
| Kub tsom | Tshwj xeeb tsim rauqis kub toughness(tsis ua haujlwm kub siab) |
Cov ntsiab lus tseem ceeb: Qib vs
To taub qhov txawv ntawmQibthiabChav kawmQhov tseem ceeb rau ASTM A671:
| Lub sij hawm | Txhais | Piv txwv |
|---|---|---|
| Qib | Designates lubhom phaj siab lub nkoj sivlos tsim cov yeeb nkab. Qib qhia txog cov khoom siv tshuaj lom neeg muaj pes tsawg leeg thiab qib zog. | CA55, CB60, CC60, CC65, CC70 |
| Chav kawm | Xaiv peb yam tseem ceeb ntawm kev tsim khoom:Kev kho cua sov tau ua, sebweld yog kuaj radiographically, thiab seb covcov yeeb nkab raug kuaj . | 10, 12, 22, 32, 42, 52 (saib cov lus hauv qab no) |
Common Qib (Plate Material Designations)
Cov "Qib" hauv ASTM A671 sib haum rau cov phaj siab tshwj xeeb tshwj xeeb:
| Qib | Sib Plate Specification | Daim ntawv thov |
|---|---|---|
| CA 55 | ASTM A285 Qib A lossis B | General carbon steel kev pab |
| CB 60 | ASTM A516 Qib 60 | Lub zog nruab nrab, zoo toughness |
| SIB CB65 | ASTM A516 Qib 65 | Siab zog, txhim kho toughness |
| SIB 70 | ASTM A516 Qib 70 | Siab zog, zoo heev toughness |
| CC 60 | ASTM A516 Qib 60 (nrog rau kev xav tau ntxiv) | Tsawg-kev pabcuam kub |
| CC65 ua | ASTM A516 Qib 65 (nrog rau kev xav tau ntxiv) | Tsawg-kev pabcuam kub |
| CC70 ua | ASTM A516 Qib 70 (nrog rau kev xav tau ntxiv) | Feem ntau tshwm sim rau qis - cov ntawv thov kub |
| CJA115 | Alloy steel phaj | Siab - siv zog alloy |
| CJB115 | Alloy steel phaj | Siab - siv zog alloy |
| CF65/CF70 | Nickel steel phaj | Txhim kho qis -kub toughness |
Class Designations – Ua kom tiav Reference Table
Qhov "Class" txiav txim siab txog kev kho cua sov, kev kuaj hluav taws xob, thiab kev ntsuas siab. Cov chav kawm ua raws li kev txheeb xyuas tus lej uas qhovthawj tus lej qhia txog hom kev kho cua sov, thiab covTus lej thib ob qhia txog qib kev soj ntsuam :
| Chav kawm | Kev kho cua sov | Xov tooj cua | Kev ntsuas siab | Daim ntawv thov |
|---|---|---|---|---|
| 10 | Tsis muaj | Tsis muaj | Tsis muaj | Tsis yog -tseem ceeb, qis- siab |
| 11 | Tsis muaj | Yog lawm | Tsis muaj | Thaum weld kev ntseeg tseeb tseeb xav tau yam tsis muaj kev sim siab |
| 12 | Tsis muaj | Yog lawm | Yog lawm | Feem ntau yog siv rau raws li -welded kev pab cuam yuav tsum tau soj ntsuam tag nrho |
| 13 | Tsis muaj | Tsis muaj | Yog lawm | Siab- sim xwb |
| 20 | Kev ntxhov siab | Tsis muaj | Tsis muaj | Kev nyuaj siab nyem rau qhov seem stability |
| 21 | Kev ntxhov siab | Yog lawm | Tsis muaj | Txhim kho kev ntxhov siab nrog kev ntsuam xyuas weld |
| 22 | Kev ntxhov siab | Yog lawm | Yog lawm | Feem ntau tshwm sim rau kev ntxhov siab -kev pab cuam |
| 23 | Kev ntxhov siab | Tsis muaj | Yog lawm | Kev ntxhov siab nrog kev sim siab nkaus xwb |
| 30 | Li qub | Tsis muaj | Tsis muaj | Normalized rau grain refinement |
| 31 | Li qub | Yog lawm | Tsis muaj | Normalized nrog weld kuaj |
| 32 | Li qub | Yog lawm | Yog lawm | Feem ntau rau kev pabcuam normalized |
| 33 | Li qub | Tsis muaj | Yog lawm | Normalized nrog kev ntsuas siab nkaus xwb |
| 40 | Normalized & Tempered | Tsis muaj | Tsis muaj | Txhim kho cov khoom siv kho tshuab |
| 41 | Normalized & Tempered | Yog lawm | Tsis muaj | Txhim kho cov khoom nrog kev kuaj xyuas weld |
| 42 | Normalized & Tempered | Yog lawm | Yog lawm | Kev kho cua sov tag nrho thiab tshuaj xyuas |
| 43 | Normalized & Tempered | Tsis muaj | Yog lawm | Ua kom muaj zog nrog kev ntsuas siab |
| 50 | Quenched & Tempered | Tsis muaj | Tsis muaj | Lub zog siab tshaj plaws |
| 51 | Quenched & Tempered | Yog lawm | Tsis muaj | Lub zog siab tshaj plaws nrog kev ntsuam xyuas weld |
| 52 | Quenched & Tempered | Yog lawm | Yog lawm | Lub zog siab tshaj plaws nrog kev tshuaj xyuas tag nrho |
| 53 | Quenched & Tempered | Tsis muaj | Yog lawm | Lub zog siab tshaj plaws nrog kev ntsuas siab |
| 70/71/72/73 | Quenched & Precipitation Thaum tshav kub kub kho | Ntau yam | Ntau yam | Tshwj xeeb alloy steels |
Nco tseg:Chav kawm lej system ua haujlwm raws li hauv qab no:
Thawj tus lej(10-70): Kev kho cua sov hom (10=as-welded, 20=kev nyuaj siab relieved, 30=normalized, 40=normalized & tempered, 50=quenched & tempered)
Tus lej thib ob(0,1,2,3): Qib soj ntsuam (0=tsis muaj, 1=RT nkaus xwb, 2=RT + hydrotest, 3=hydrotes nkaus xwb)
Chemical Composition (Hom rau Carbon Steel Qib)
| Qib | Cov pa roj carbon (C)% | Silicon (Si)% | Manganese (Mn)% | Phosphorus (P)% | Sulfur (S)% |
|---|---|---|---|---|---|
| CA 55 | 0.28 max | - | 0.98 max | 0.035 max | 0.035 max |
| CB 60 | 0.24 max | 0.13-0.45 | max 1.30 Nws | 0.035 max | 0.035 max |
| SIB CB65 | 0.28 max | 0.13-0.45 | max 1.30 Nws | 0.035 max | 0.035 max |
| SIB 70 | 0.31 max | 0.13-0.45 | max 1.30 Nws | 0.035 max | 0.035 max |
| CC 60 | 0.21 max | 0.55-0.98 | 0.79-1.30 | 0.035 max | 0.035 max |
| CC65 ua | 0.24 max | 0.55-0.98 | 0.79-1.30 | 0.035 max | 0.035 max |
| CC70 ua | 0.27 max | 0.55-0.98 | 0.79-1.30 | 0.035 max | 0.035 max |
Qhov chaw:
Mechanical Properties
| Qib | Yield zog (MPa) min | Tensile zog (MPa) | Elongation% (ntev) |
|---|---|---|---|
| CA 55 | 205 | 380-515 | 27 |
| CB 60 | 220 | 415-550 | 25 |
| SIB CB65 | 240 | 450-585 | 23 |
| SIB 70 | 260 | 485-620 | 21 |
| CC 60 | 220 | 415-550 | 25 |
| CC65 ua | 240 | 450-585 | 23 |
| CC70 ua | 260 | 485-620 | 21 |
Vuam Point Tensile Strength:Yuav tsum tau ntsib los yog tshaj qhov tsawg kawg nkaus tensile lub zog ntawm lub hauv paus hlau qib.
Kev tsim khoom
ASTM A671 EFW cov kav dej yog tsim los siv cov txheej txheem hauv qab no:
Kev npaj phaj:Lub nkoj siab zoo steel phaj raug xaiv raws li qib yuav tsum tau (A516, A515, A285, thiab lwm yam).
Kev tsim:Cov phaj yog tsim rau hauv cov duab cylindrical sivPeb Yob Khoovlos yog technology zoo sib xws.
Vuam:Longitudinal seam yog welded sivSubmerged Arc Welding (SAW)txheej txheem nrogntxiv cov hlau nplaum- qhov no txawv ntawm EFW los ntawm ERW (uas tsis siv cov hlau muab tub lim).
Mechanical Expanding:Cov yeeb nkab tau nthuav dav kom ua tiav qhov kev ua tau zoo ntawm qhov ntev.
Kev kho cua sov:Siv raws li cov chav kawm uas tau teev tseg (kev ntxhov siab txo qis, normalizing, quenching & tempering).
NDT & Test:Kev kuaj hluav taws xob, kuaj hydrostatic, kuaj ultrasonic raws li qhov xav tau los ntawm Chav Kawm.
Ua tiav:Kev npaj kawg (beveled, tiaj), daim ntawv thov txheej raws li tau teev tseg.
Cov lus sib piv: ASTM A671 vs ASTM A672
ASTM A671 feem ntau piv nrog ASTM A672, raws li ob qho tib si yog EFW cov qauv yeeb nkab los ntawm cov phaj siab siab:
| Yam | ASTM A671 Cov Lus Qhia Tshwj Xeeb | ASTM A672 Cov Lus Qhia Tshwj Xeeb |
|---|---|---|
| Kev Pabcuam Kub | Atmospheric thiab qis dua | Nruab nrab thiab siab dua |
| Ua kom pom tseeb | Tsawg-kub toughness, cuam tshuam cov khoom | Siab kub lub zog, creep kuj |
| Hom Qib | CC60, CC65, CC70 (A516-raws li) | B60, B65, B70 (zoo sib xws daim hlau tab sis txawv yuav tsum tau) |
| Cov ntawv thov siv | Tsawg-Cov txheej txheem ntsuas kub, LNG, kev pabcuam txias | Boiler sab nraud piping, siab -kub txheej txheem kab |
| Kev ntsuam xyuas cuam tshuam | Feem ntau yuav tsum tau ua rau qis -kev pabcuam kub | Feem ntau tsis tas yuav tsum tau tshwj tsis yog tau teev tseg |
Kev Ntsuas & Kev Ntsuam Xyuas Cov Cai
Nyob ntawm chav kawm xaiv, ASTM A671 cov kav dej tau txais:
| Hom kev xeem | Lub hom phiaj | Kev siv tau |
|---|---|---|
| Kev Ntsuas Siab | Txheeb xyuas qhov tawm los thiab lub zog tensile | Txhua qib |
| Transverse Guided Weld Khoov Test | Txheeb xyuas qhov vuam ductility thiab kev ncaj ncees | Tag nrho cov kav dej |
| Flattening Test | Tshawb xyuas ductility | Raws li tau teev tseg |
| Kev kuaj hluav taws xob (RT) | Tshawb xyuas qhov tsis xws luag | Yuav tsum muaj rau cov chav kawm nrog "1" lossis "2" ua tus lej thib ob |
| Hydrostatic Test | Cov ntaub ntawv pov thawj ntawm leak-tightness | Yuav tsum muaj rau cov chav kawm nrog "2" lossis "3" ua tus lej thib ob |
| Impact Testing (Charpy V-notch) | Txheeb xyuas qhov qis-kub toughness | Feem ntau xav tau rau qhov kev pabcuam kub qis qis, teev raws li kev xav tau ntxiv |
| Kev kuaj ultrasonic (UT) | Tshawb xyuas cov teeb meem ntawm laminar | Kev xav tau ntxiv |
| Dimensional soj ntsuam | Txheeb xyuas OD, phab ntsa thickness, ncaj | 100% |
Cov ntawv thov siv
ASTM A671 EFW kav yog dav siv hauv:
| Kev lag luam | Daim ntawv thov |
|---|---|
| Fais fab nroj tsuag | Cov kav dej txias, condensers, feedwater systems |
| LNG thiab Petrochemical | Tsawg-tej txheej txheem piping, cov kev pabcuam cryogenic |
| Roj & Roj | Tsawg-rau- cov kav dej nruab nrab siab rau cov kua dej txias, cov roj sib sau ua ke |
| Industrial Infrastructure | Cov kav dej uas yuav tsum tau muaj zog ntawm qhov kub thiab txias |
| Refineries | Cov kav dej tawm sab nraud, cov khoom siv hluav taws xob hauv cov huab cua txias |
| Cheeb tsam cua sov | Kev faib tawm tes hauj lwm (thaum kub nruab nrab) |
| Kev kho dej | Loj - kab kab dej uas xav tau lub peev xwm siab |
Hom Loj Muaj
| Parameter | Ntau yam |
|---|---|
| Sab nraud txoj kab uas hla | 16 "(400mm) txog 100" (2500mm) + |
| Phab ntsa Thickness | 6mm (0.25 ") mus rau 75mm (3") |
| Ntev | 6 m, 12 m, lossis kev cai raws li xav tau |
| Xaus Xaus | Plain xaus, beveled xaus rau vuam |
Surface Finish & Protection Options
| Hom tiav | Daim ntawv thov |
|---|---|
| Mill tiav(raws li -welded) | Txheem, rau kev ua haujlwm ntxiv |
| Primer - pleev xim rau | Kev tiv thaiv corrosion ib ntus |
| Epoxy txheej | Kev tiv thaiv corrosion rau faus / kev pabcuam kab |
| 3 LPE txheej | faus cov kav dej, ib puag ncig hnyav |
| Galvanized | Tsis tshua muaj tshwm sim vim loj diameters |
Cov Txheej Txheem Xaiv Chav
Xaiv cov chav kawm tsim nyog nyob ntawm cov kev xav tau kev pabcuam:
| Kev Pabcuam | Chav Kawm pom zoo | Kev xav |
|---|---|---|
| Tsis yog -tseem ceeb, qis- siab | 10 lub 13 | Tus nqi qis tshaj, kev sim tsawg kawg nkaus |
| General kev lag luam, nruab nrab siab | 12 | Raws li -welded nrog kev soj ntsuam tag nrho (RT + hydrotest) |
| Cov hlab ntsha siab, kev pabcuam tseem ceeb | 22 | Kev ntxhov siab daws nrog kev tshuaj xyuas tag nrho -feem ntau siv rau ntau daim ntawv thov |
| Tsawg-kev pabcuam kub | 32o42 ib | Normalized los yog normalized & tempered rau grain refinement thiab toughness |
| Siab - yuav tsum muaj zog | 52 | quenched & tempered rau siab tshaj plaws lub zog |
| Kev pabcuam hnyav | 42 lossis 52 nrog cov kev xav tau ntxiv | Kev kho cua sov tag nrho thiab tshuaj xyuas |
Qhov zoo ntawm ASTM A671 EFW Pipe
| Qhov zoo | Kev piav qhia |
|---|---|
| Loj Loj Muaj peev xwm | Muaj peev xwm tsim cov kav dej ntau dua li seamless lossis ERW muaj peev xwm |
| Phab ntsa tuab | Haum rau siab - cov ntawv thov siab xav tau cov phab ntsa tuab heev |
| Khoom siv yooj yim | Ntau yam ntawm cov qib phaj muaj rau cov kev pabcuam sib txawv |
| Tsawg-Tsub Toughness | Tshwj xeeb tsim rau atmospheric thiab qis kub kev pab cuam |
| Kev Tswj Xyuas Zoo | Chav kawm system tso cai rau qib kev soj ntsuam zoo sib xws rau kev pabcuam tseem ceeb |
| Pov thawj Performance | Cov keeb kwm ntev hauv kev siv hluav taws xob, petrochemical, thiab kev lag luam |
| Fabrication los ntawm Plate | Ua kom siv cov khoom siv siab ntawm cov hlab ntsha zoo nrog cov khoom pov thawj |
Cov Lus Cim Xaiv Tseem Ceeb
1. Qib Xaiv
Qauv TSIS MUAJ: CA55, CB60, CB65, CB70:General carbon steel kev pab
Qauv TSIS MUAJ: CC60, CC65, CC70 Txaus siab rau kev siv qis -kubyuav tsum tau txhim kho toughness
Ntau dua=lub zog siab dua (60, 65, 70 qhia tias kwv yees lub zog tensile hauv ksi)
2. Chav Kawm Xaiv Logic
Chav kawm lej system ua rau xaiv ncaj nraim:
Thawj tus lej= kev kho cua sov: 10 (raws li -welded), 20 (kev ntxhov siab relieved), 30 (normalized), 40 (normalized & tempered), 50 (quenched & tempered)
Tus lej thib ob= kev tshuaj xyuas: 0 (tsis muaj), 1 (RT nkaus xwb), 2 (RT + hydrotest), 3 (hydrotest nkaus xwb)
Kev xaiv ntau tshaj plaws:
Chav Kawm 12:Raws li -welded, kuaj tag nrho - rau kev pabcuam dav dav
Chav Kawm 22:Txo kev ntxhov siab, tshuaj xyuas tag nrho -txheem rau ntau daim ntawv thov
Chav Kawm 32:Zoo li qub, tshuaj xyuas tag nrho - rau qis -kev pabcuam kub
3. Kev txwv kub
ASTM A671 tshwj xeeb rauatmospheric thiab qis kub
For elevated temperature service (>400℃F / 200 degree), qhia meejASTM A672 Cov Lus Qhia Tshwj Xeebxwb
Rau qhov kub qis heev (qis dua -50℃F /-45 degree), txheeb xyuas qhov kev ntsuas cuam tshuam nrog cov lus qhia ntxiv
4. Kev Ua Raws Cai
ASME Code: Feem ntau siv raws liSIB-671rau Boiler thiab Pressure Vessel Code daim ntawv thov
Nrog rau kev tsim kho cov cai (ASME B31.3, B31.1, thiab lwm yam) rau kev lees paub thiab tsim qauv
5. Quality Assurance
Mill Test Certificate:EN 10204 3.1 lossis 3.2feem ntau xav tau rau cov ntawv thov tseem ceeb
Xyuas kom txhua qhov kev xeem uas yuav tsum tau ua (RT, hydrotest, cuam tshuam) rau ib chav kawm teev tseg
Thaum kawg Takeaway: ASTM A671 EFW Yeeb Nkabyog covtxheem specification rau loj -inch, hluav taws xob-fusion-welded steel yeeb nkabfabricated los ntawm siab hlab ntsha zoo daim hlau rausiab - kev pabcuam siab ntawm atmospheric thiab qis dua. Nws yog qhov txawv ntawm nwsQib(qhia cov khoom siv phaj, piv txwv li, CC70 los ntawm A516 Gr.70) thiabChav kawm(qhia txog kev kho cua sov thiab qib tshuaj ntsuam xyuas, piv txwv li, Chav Kawm 22 rau kev ntxhov siab-relieved nrog radiography thiab hydrotest). Cov yeeb nkab no yog qhov tseem ceeb raufais fab nroj tsuag txias tshuab, LNG chaw, petrochemical txheej txheem piping, thiab industrial infrastructurexav tau cov kab loj loj, cov phab ntsa tuab, thiab txhim khu kev qha qis - kub ua haujlwm. Qhov kev qhia tshwj xeeb tshaj plaws rau qis - qhov kev pabcuam kub yogASTM A671 CC70 Qib 22 .
