A672 Qib B65 Carbon Steel Yeeb Nkab rau Siab -Kev Pabcuam Siab
A672 Qib B65yog asiab -lub zog carbon-manganese steel yeeb nkabtsim tshwj xeeb rausiab -siab, siab -kev pabcuam kub, tshwj xeeb tshaj yog nyob rau hauv fais fab nroj tsuag, refineries, thiab chemical processing industries.
Cov yam ntxwv tseem ceeb
Khoom siv:Hluav taws xob-fusion-welded carbon steel yeeb nkab
Primary Standard: ASTM A672 / ASME SA-672 Cov Lus Qhia- Txheem Specification rau Hluav Taws Xob-Fusion-Welded Steel Yeeb Nkab rau Siab- Kev Pabcuam Siab ntawm Cov Kub Kub Kub
Kev tsim khoom:Hluav taws xob fusion vuam nrog kev kho cua sov tom qab
Qhov kub thiab txias:Haum rau nruab nrab mus rau qhov kub thiab txias
Kev ntsuas siab:Tsim los rau kev siv siab -siab
Qib Qib Kev Ntsuas
A672= ASTM specification rau hluav taws xob -fusion-welded yeeb nkab
B= Yam tsawg kawg nkaus yield zog (tsim 240 MPa / 35 ksi yield zog)
65= Tsawg tensile lub zog hauv ksi (65,000 psi=450 MPa)
Tshuaj muaj pes tsawg leeg (ASTM A672 Qib B65)
| Lub ntsiab | Cov ntsiab lus (%) | Sau ntawv |
|---|---|---|
| C (Carbon) | Tsawg dua lossis sib npaug li 0.22 | Sib npaug rau weldability thiab lub zog |
| Manganese (Mn) | Tsawg dua lossis sib npaug rau 1.20 | Muab lub zog thiab hardenability |
| P (phosphorus) | Tsawg dua lossis sib npaug li 0.035 | Qhov siab tshaj plaws |
| S (Sulfur) | Tsawg dua lossis sib npaug li 0.035 | Qhov siab tshaj plaws |
| Si (Silicon) | Tsawg dua los yog sib npaug li 0.35 | Deoxidizer, txhim kho lub zog |
| Cu (kwv yees) | Tsawg dua los yog sib npaug li 0.35 | Thaum tau teev tseg (kev txhim kho corrosion kuj) |
| Ni (Nickel) | Tsawg dua lossis sib npaug li 0.25 | Thaum tau teev tseg |
| Cr (Chromium) | Tsawg dua lossis sib npaug li 0.25 | Thaum tau teev tseg |
| Molybdenum (zeeg) | Tsawg dua lossis sib npaug li 0.08 | Thaum tau teev tseg |
| V (Vanadium) | Tsawg dua lossis sib npaug li 0.03 | Thaum tau teev tseg |
Nco tseg: Cov txiaj ntsig ntawm Cu, Ni, Cr, thiab Mo yuav tsum tsis pub tshaj 0.75% tshwj tsis yog tias pom zoo.
Mechanical Properties
| Khoom | Kev xav tau | Sib npaug hauv ksi |
|---|---|---|
| Tensile zog (min) | 450 MPa | 65,000 psi |
| Yield zog (min) | 240 MPa | 35,000 psi |
| Elongation hauv 2 nti (min) | Raws li phab ntsa thickness: • t Tsawg dua lossis sib npaug ntawm 0.787 hauv.: 30% • t > 0.787 nyob rau hauv.: 28% |
Kev kho cua sov yuav tsum tau
A672 Qib B65 xav taupost-weld kev kho cua sov (PWHT)raws li tau teev tseg:
| Cov xwm txheej chav kawm | Kev kho cua sov | Tej kev siv |
|---|---|---|
| Chav Kawm 12 | Li qub | Feem ntau yog rau qib B65 |
| Chav Kawm 13 | Normalized thiab tempered | Rau kev txhim kho toughness |
| Chav Kawm 22 | Kev ntxhov siab nkaus xwb | Txwv tsis pub siv |
| Chav Kawm 32 | Raws li -welded | Feem ntau tsis siv rau B65 |
Nco tseg:Chav Kawm 12 (normalized) yog qhov feem ntau teev rau Qib B65.
Kev tsim khoom
Electric Fusion Vuam:Longitudinal seam vuam
Kev tsim:Phaj los yog daim ntawv tsim ua cylindrical
Vuam:Tsis siv neeg txheej txheem nrog muab tub lim hlau
Kev kho cua sov:Tag nrho normalization ntawm cov yeeb nkab tiav
Kev kuaj:NDE nthuav dav thiab kev sim tshuab
Kev sib piv nrog Cov Qib Pipe
| Parameter | A672 B65 | A106 B | A53 B |
|---|---|---|---|
| Kev tsim khoom | Hluav taws xob fusion welded | Seamless | Seamless los yog ERW |
| Min Yield zog | 240 MPa | 240 MPa | 240 MPa |
| Min Tensile zog | 450 MPa | 415 MPa rau | 415 MPa rau |
| Kev Pabcuam Kub | Nruab nrab mus rau siab | Kub kub | Lub hom phiaj dav dav |
| Siv dav | Siab -piping siab | High -kub kav | General siab piping |
| Nqi | Nruab nrab | Siab dua | qis |
Tej kev siv
1. Kev tsim hluav taws xob:
Boiler feedwater kab
Siab - siab zog piping (tsis yog- tseem ceeb)
Kev pabcuam piping hauv cov nroj tsuag muaj zog
Dej phab ntsa headers
2. Petrochemical Kev Lag Luam:
Txheej txheem kav
High -kev thauj cov kua dej
Utility piping systems
3. Cov nroj tsuag muaj:
Siab - cua thiab roj kab
Hydraulic systems
Compressed gas piping
4. Cov ntawv thov tshwj xeeb ntawm boiler:
Economizer inlet / qhov hluav taws xob headers
Tsawg-kub superheater txuas
Boiler sab nraud piping (ib ASME B31.1)
Loj thiab Dimension Range
| Parameter | Hom kab mob |
|---|---|
| Sab nraud txoj kab uas hla | 18 "mus rau 100" (457mm txog 2540mm) |
| Phab ntsa Thickness | 0.25 "mus rau 3.0" (6.4mm txog 76mm) |
| Ntev | Feem ntau 20-40 ft (6-12 m) |
Lus Cim: A672 yog tshwj xeeb rau cov kav dej loj.
Vuam thiab Fabrication Considerations
| Yam | Requirement/Recommendation |
|---|---|
| Preheating | Required for thick sections (>1" / 25mm) |
| Interpass kub | 300-600 ° F (150-315 ° F) |
| PWHT | Yuav tsum tau tom qab vuam (normalization) |
| Filler hlau | AWS E7018, E8018, or matching composition |
| Cov txheej txheem vuam | GMAW, GMAW, SAW |
Cov kev xav tau zoo thiab kev xeem
ASTM A672 qhia txog kev xeem nruj:
Hydrostatic Test:Yuav tsum tau ua rau txhua lub yeeb nkab
Tensile Tests:Los ntawm cov yeeb nkab lossis cov ntawv xeem
Flattening Test:Rau welded pob qij txha
Tsis yog-Kev kuaj xyuas kev puas tsuaj:
Kev kuaj hluav taws xob (RT) ntawm tag nrho cov vuam ntev
Ultrasonic kuaj (UT) raws li ntxiv
Kev tshuaj xyuas qhov muag:Sab hauv thiab sab nraud
Siab -Tsuas Ntsuas
Cov txiaj ntsig kev ntxhov siab tso cai rau A672 B65 tau muab rau hauvASME B31.1 (Lub zog Piping)thiabASME Section II, Part D:
| Kub (degree F / degree) | Tso cai Stress (ksi/MPa) - kwv yees |
|---|---|
| 100℃F / 38 degree | 17.5 ksi / 120 MPa |
| 400℃F / 204 degree | 17.5 ksi / 120 MPa |
| 650℃F / 343 degree | 15.0 KSI / 103 MPa |
| 800℃F / 427 degree | 12.5 ksi / 86 MPa |
Nco tseg: Cov nqi tiag tiag yuav tsum tau txais los ntawm ASME Tshooj II, Tshooj D.
Qib sib npaug thiab zoo sib xws
| Txuj | Qib sib npaug / Similar |
|---|---|
| ASME | SA-672 B65 (zoo tib yam) |
| ISO | Tsis muaj qhov sib npaug ncaj qha |
| DIN | Zoo ib yam li DIN 17175 St 45.8 |
| JIS | Zoo ib yam li JIS G3456 STPT 410 |
Qhov zoo thiab qhov txwv
Qhov zoo:
Tus nqi- zoorau txoj kab uas hla loj siab -siab piping
Zoo weldabilitynrog cov txheej txheem kom raug
Muaj nyob rau hauv qhov loj metsis yooj yim ua seamless
Tag nrho normalizationua kom cov khoom sib xws
Extensive NDEmuab kev ntseeg siab rau qhov zoo
Kev txwv:
Welded kev tsim khotej zaum yuav muaj kev txhawj xeeb HAZ
Tsis yog rau kev pabcuam cyclictsis muaj kev xav tshwj xeeb
Txwv rau qhov kub thiab txias(feem ntau Tsawg dua lossis sib npaug rau 800℃F / 427 degree)
Tsis yog rau kev pabcuam corrosion hnyavtsis muaj kev tiv thaiv
Boiler Code Ua raws cai
ASME Boiler thiab Pressure Vessel Code Txais:
Ntu I:Tso cai rau qee qhov boiler sab nraud piping
B31.1:Dav siv rau cov kav dej fais fab
Ntu VIII:Txaus siab rau cov hlab ntsha hauv qhov kub thiab txias
Tseem ceeb:A672 cov kav dej xav tauCode Caselos yog kev pom zoo tshwj xeeb rau Tshooj I kev tsim kho thaum siv rau qee daim ntawv thov.
Ordering Information
Yam khoom specification muaj xws li:
ntawv nyeem
ASTM A672 Qib B65 Chav Kawm 12 Loj: OD x Phab Ntsa Thickness x Length Cov Lus Qhia Ntxiv: S1, S2, thiab lwm yam raws li xav tau Kev kho cua sov: Normalized (Class 12) Kev Npaj Kawg: Beveled rau vuam
Kev sib piv nrog Lwm Cov Qib A672
| Qib | Min Yield (MPa/ksi) | Min Tensile (MPa/ksi) | Siv dav |
|---|---|---|---|
| B55 | 205/30 | 380/55 | Tsawg siab |
| B65 | 240/35 | 450/65 | Txheem siab -siab |
| B70 | 240/35 | 485/70 | Siab zog |
| C65 | 275/40 | 450/65 | Ntau zog tawm los |
Cov ntsiab lus
ASTM A672 Qib B65yog asiab -zoo hluav taws xob- fusion-welded carbon steel yeeb nkabtshwj xeeb engineered rausiab -siab, nruab nrab- kev pabcuam kubhauv cov ntawv thov tseem ceeb xws li cov chaw tsim hluav taws xob thiab cov refineries. Nws muaj pes tsawg leeg ntawm carbon thiab manganese muab lub zog zoo thaum tuav weldability. Kev kho cua sov yuav tsum tau ua kom cov khoom siv kho kom zoo ib yam thiab txo cov kev ntxhov siab uas nyob ntawm vuam.
Thaum tsis yog "boiler tube" cov khoom siv rau ib tus se (xws li SA-213), nws tau siv dav rauboiler sab nraud piping, headers, thiab siab -pressure feedwater kabhauv cov chaw tsim hluav taws xob. Nws txoj kev siv welded tso cai rau kev lag luam ntawm cov kab loj loj uas yuav nyuaj lossis kim los tsim cov yeeb nkab seamless. Thaum tau teev tseg kom raug, tsim kho, thiab tshuaj xyuas, A672 B65 muab kev ua tau zoo txhim khu kev qha hauv kev xav tau siab - siab siv kev lag luam.
