SA671 CH100 Carbon Steel Boiler Steel Yeeb Nkab
Taw qhia
ASTM A671 CH100 yog asiab-lub zog, tshav kub- kho, hluav taws xob- fusion-welded carbon steel phaj yeeb nkabtsim rausiab-siab thiab siab- qhov kev pabcuam kub. Nws yog ib qib tshwj xeeb hauv ASTM A671 specification.
Covnomenclatureyog qhov tseem ceeb:
SWB 671:Lub hauv paus specification rau hluav taws xob -fusion-welded yeeb nkab.
C:Qhia tias cov yeeb nkab yog tsim los ntawmcarbon steel phaj.
H:Ib qho yuav tsum tau ua kom paub tseeb tias cov khoom siv kho tshuab tau teev tseg yuav tsum tau ua raws li hauvkub- kho mobrau covtag nrho lub cev(tsis yog thaj chaw weld).
100:Sawv cev rauYam tsawg kawg nkaus uas muaj zog ntawm 100 ksi (690 MPa).
Lub npe "H" yog qhov tseem ceeb. Nws txhais tau hais tias cov yeeb nkab ua tiav tau ua tiav tag nrho - kev kho cua sov hauv lub cev (xws li normalizing thiab tempering) tom qab fabrication, kom ntseeg tau tias cov khoom sib xws thiab cov khoom siv kho kom zoo thoob plaws.
Cov yam ntxwv tseem ceeb
Khoom siv:Siab - lub zog carbon steel.
Kev tsim khoom:Hluav taws xob-Fusion-Welded (EFW) los ntawm cov hlau phaj, ua raws lipuv -kev kho lub cev kub.
Cov khoom tseem ceeb: Exceptionally siab thiab uniform yield / tensile lub zog nrog txhim kho toughnessvim kev kho cua sov.
Thaum tshav kub kub kho mob: Yuav tsum tau- Cov kav dej tau muab rau hauv qhov cua sov- kho mob.
Yam Kev Pabcuam Kub Kub:Haum rau qhov kub thiab txias, nrog rau kev tso cai kev ntxhov siab los ntawm cov lej xws li ASME BPVC Tshooj II, Ntu D.
Daim Ntawv Thov Tseem Ceeb:Tseem ceeb heev -siab, siab -kub kav hauv cov chaw tsim hluav taws xob thiab kev lag luam hnyav uas qhov siab tshaj plaws thiab kev ntseeg siab yog qhov tseem ceeb.
Qauv:ASTM A671 Cov Khoom Siv Hluav Taws Xob
Chemical Composition (Hom / Yuav Tsum Tau, %)
Cov tshuaj muaj pes tsawg leeg yog qhov tseem ceeb kom ua tiav lub zog tshwj xeeb tom qab kev kho cua sov. Nws zoo ib yam li C100 tab sis nrog kev tswj nruj dua.
| Lub ntsiab | Qhov siab tshaj plaws (%) | Sau ntawv |
|---|---|---|
| Cov pa roj carbon (C) | 0.20 - 0.25 | Ua tib zoo sib npaug rau lub zog (hardenability) thiab weldability. |
| Manganese (Mn) | 1.15 - 1.50 | Lub hauv paus tseem ceeb ntxiv dag zog; ntau optimized rau kev kho cua sov. |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025 | Khaws qis heev los khaws cov toughness. |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.025 | Khaws qis heev los tiv thaiv kub luv thiab txhim kho weldability. |
| Silicon (Si) | 0.15 - 0.40 | Deoxidizer thiab cov kua nplaum muaj zog. |
| Carbon sib npaug (CE) | ~0.40 - 0.48 (IIW Formula) | Tus nqi suav (C + Mn / 6 + ...) uas yuav tsum tau tswj kom ntseeg tau tias weldability yam tsis muaj pre/post- cov teeb meem kev kho cua sov. |
* Ceebtoom: Cov khoom siv phaj tiag tiag feem ntau ua raws li qhov tshwj xeeb xws li ASTM A537 Chav Kawm 2 lossis cov cua sov zoo sib xws- qib kho tau. Cov kev qhia tshwj xeeb ntawm cov neeg yuav khoom feem ntau hais txog qhov txwv.*
Mechanical Properties (Rov kub-Tho tau mob)
| Khoom | Tus nqi (Imperial) | Tus nqi (Metric) | Xwm Txheej / Ceeb Toom |
|---|---|---|---|
| Yield zog (min) | 100 ksg | 690 MPa ua | Nyob rau hauv chav tsev kub. |
| Tensile zog (min) | 115 ksg | 795mpa ua | Nyob rau hauv chav tsev kub. |
| Elongation (min,%) | 16 | 16 | Hauv 2 ntiv tes (50mm) ntsuas qhov ntev. |
| Hardness (max) | 225 HWBlos yog235 hwv | 225 HWBlos yog235 hwv | Feem ntau tau teev los xyuas kom meej weldability zoo thiab tsis kam rau hydrogen -induced cracking (HIC). |
* Impact Toughness: Rau CH100, Charpy V-Qhov kev ntsuas qhov cuam tshuam feem ntau yogqhia los ntawm tus neeg yuav khoom. Xav tau lub zog nqus (piv txwv li, 20 ft-lb / 27 J avg) thiab ntsuas kub (piv txwv li, 32℃F / 0℃lossis siab dua) tau txhais hauv daim ntawv xaj khoom raws li kev tsim qauv.*
Yuav tsum tau kho cua sov
Txheej txheem:Covtag nrho cov yeeb nkab tiavyuav tsum tau txais kev kho cua sov xws linormalizinglos yogNormalizing thiab tempering.
Lub hom phiaj:
Txhawm rau kho cov qauv nplej ntawm ob lub hauv paus phaj thiab vuam / cua sov- cuam tshuam cheeb tsam (HAZ).
Txhawm rau kom ua tiav cov txheej txheem microstructure (piv txwv li, nplua pearlite / ferrite) thoob plaws hauv lub cev yeeb nkab.
Txhawm rau kom tau txais cov khoom siv kho tshuab tau teev tseg.
Txhawm rau txo qis kev ntxhov siab los ntawm kev tsim thiab vuam txheej txheem.
Rauho txhim kho toughness thiab kuj rau brittle puas.
Tsis yog -Kev Tshawb Fawb Kev Ua Phem (NDE)
Vim nws qhov kev pabcuam tseem ceeb, qib siab ntawm NDE yog tus qauv:
Radiography (RT):Lub longitudinal seam weld yog100% radiographed(feem ntau ua raws li ASTM A671Chav Kawm 12).
Kev Ntsuas Ultrasonic (UT):Feem ntau teev rau cov vuam seam thiab qee zaum lub hauv paus phaj txhawm rau txheeb xyuas qhov tsis zoo ntawm cov txheej txheem.
Kev Ntsuas Hydrostatic:Txhua lub yeeb nkab yog ntsuas siab mus rau qib uas tau teev tseg los ntawm tus qauv lossis tus neeg yuav khoom.
Tej kev siv
Tseem ceeb heev -Ntsuj Siab Chav Kab(lub ntsiab chav, kub reheat) hauv ultra-supercritical (USC) thee- hluav taws xob hluav taws xob.
Siab -Hloov Feedwater Heater Plhaub thiab Tubes.
Hnyav-Wall Reactor Vesselsthiab hydrocracker Cheebtsam hauv petrochemical kev lag luam.
Nuclear fais fab nroj tsuagauxiliary siab- lub tshuab siab (tsis yog- sab nuclear).
Txhua daim ntawv thov xav tau qhov zoo tshaj plaws ua ke ntawm siab zog, toughness, thiab siab ncaj ncees.
Sib piv: C100 vs. CH100
| Feature | TIAB SA 671 C100 | TIAB SA 671 CH100 |
|---|---|---|
| Kev kho cua sov | Weld seam stress nyemyog yuav tsum tau. Tag nrho - kev kho lub cev kub yogxaiv tautshwj tsis yog tias tau teev tseg. | Tag nrho -kev kho lub cev kub (xws li, normalize & temper) yog MANDATORY. |
| Cov khoom sib xws | Cov khoom yog feem ntau lav rau lub hauv paus phaj. Weld/HAZ cov khoom yuav txawv. | Uniform mechanical zogguaranteed rautag nrho lub cev, suav nrog weld thiab HAZ. |
| Toughness & Microstructure | Zoo. Nyob ntawm phaj zoo thiab txheej txheem vuam. | Superior.Kev kho cua sov refines cov qauv nplej, ua rauzoo dua toughness thiab tawg tsis kam. |
| Nqi & Lub Sijhawm Ua Haujlwm | Tus nqi qis dua thiab lub sijhawm ua haujlwm luv dua CH100. | Tus nqi siab dua thiab lub sijhawm ua haujlwm ntev dua vim qhov yuav tsum tau ua puv - lub cev kho cua sov lub voj voog. |
| Hom Siv Case | General high - kev pabcuam siab qhov chaw tso cai. | Kev pabcuam tseem ceeb tshaj plawsqhov twg qhov kev ntseeg siab tshaj plaws, kev sib txig sib luag, thiab qhov hnyav tsis yog - sib tham. |
Standards & Certification
Primary Standard: ASTM A671 Cov Lus Qhia Tshwj Xeeb- Txuj Specification for Electric-Fusion-Welded Steel Yeeb Nkab rau Siab-Kev Pabcuam Siab ntawm Cov Kub Kub Kub.
Txoj Cai Tswjfwm:Feem ntau siv hauv qabASME Boiler thiab Pressure Vessel Code (BPVC), Tshooj I thiab Tshooj VIII.
Ntawv pov thawj:Yuav tsum muaj qhov davMill Test Certificate (MTC) - EN 10204 3.2, suav nrog:
Plate cov ntaub ntawv pov thawj nrog tag nrho chemistry thiab kev xeem.
Pipe chemical thiab mechanical test reports los ntawm cov yeeb nkab kho.
Cov ntawv ceeb toom cuam tshuam (yog tias tau teev tseg).
Cov ntaub ntawv qhia txog kev kho cua sov(kub, sijhawm, voj voog).
100% NDE qhia(RT, UA).
Hydrostatic test report.
Nco ntsoov:SA671 CH100 sawv cev raupremium qibcarbon steel welded yeeb nkab. Nws fabrication, tshwj xeeb tshaj yog vuam thiab tom qab kev kho cua sov, yuav tsum tau nruj heev nruj txheej txheem tsim nyog (PQR / WPQ) thiab zoo tswj kom nws superior zog. Nws yog cov khoom siv uas tau teev tseg rau cov ntawv thov uas xav tau tshaj plaws.
