JIS G3455 Carbon Steel Seamless Pipes rau siab -Kev Pabcuam Kub
Txheej txheem cej luam
JIS G3455yog Japanese Industrial Standard raucarbon steel seamless yeeb nkab npaj rau siab -kev pab kubnyob rau hauv boilers, tshav kub exchangers, superheaters, thiab lwm yam kev siv siab uas siab kub zog yog tseem ceeb heev. Nws yog tus Japanese sib npaug rauASTM A106 1thiabTIAB SA 17175, tshwj xeeb tsim rau cov kev pabcuam siab tshaj 350 degree.
Qib Steel & Cov Chav Kawm Kub
JIS G3455 txhais cov qhab nia raws li qhovQhov siab tshaj plaws qhov kev pabcuam kub:
| Qib Qib | Qhov Kev Pab Cuam Siab Tshaj Plaws | Sib piv ASTM Qib | Cov yam ntxwv tseem ceeb |
|---|---|---|---|
| STPA 12 | Mus txog 425 degree | A106 gr. C / A53 Gr. B | General high -kub carbon steel |
| STPA 20 | Mus txog 450 degree | A335 gr. P1 / T1 | 0.5% Molybdenum steel rau creep kuj |
| STPA 22 | Mus txog 475 degree | A335 gr. P2 / T2 | 0.5Cr-0.5Mo cov hlau tsis tshua muaj hlau |
| TIAB SA 23 | Txog li 500 degree | A335 gr. P12 / T12 | 1Cr-0.5Mo alloy hlau |
| STPA 24 | Txog li 550 degree | A335 gr. P11/T11 | 1.25Cr-0.5Mo-Si alloy hlau |
| STPA 25 | Txog li 550 degree | A335 gr. P22 / T22 | 2.25Cr-1Mo alloy hlau |
| TIAB SA 26 | Txog li 600 degree | A335 gr. P5 / T5 | 5Cr-0.5Mo alloy hlau |
Nomenclature:
STP: Seamless Tube rau lub hom phiaj siab
A: Taw qhia alloy steel (siab dua qib)
Tus lej: Kev xaiv qib kawm raws qib (tsis yog lub zog-raws li)
Mechanical Properties ntawm Chav Kub
| Qib | Tensile zog (MPa) | Yield zog (MPa) Min | Elongation (%) Min |
|---|---|---|---|
| STPA 12 | Ntau dua lossis sib npaug rau 410 | 245 | 25 |
| STPA 20 | Ntau dua lossis sib npaug rau 410 | 245 | 25 |
| STPA 22 | Ntau dua lossis sib npaug rau 410 | 245 | 25 |
| TIAB SA 23 | Ntau dua lossis sib npaug rau 410 | 245 | 25 |
| STPA 24 | Ntau dua lossis sib npaug rau 410 | 245 | 25 |
| STPA 25 | Ntau dua lossis sib npaug rau 410 | 245 | 25 |
| TIAB SA 26 | Ntau dua lossis sib npaug rau 410 | 245 | 25 |
Lus Cim: Kev kub siab tensile zog yog txhais nyob rau hauv cov rooj sib cais rau kev xam tsim.
Chemical Composition (Maximum%)
| Qib | C | Si | Mn | P | S | Cr | Mo | Lwm yam |
|---|---|---|---|---|---|---|---|---|
| STPA 12 | 0.25 | 0.35 | 0.60 | 0.035 | 0.035 | - | - | - |
| STPA 20 | 0.15 | 0.35 | 0.60 | 0.035 | 0.035 | - | 0.45-0.65 | - |
| STPA 22 | 0.15 | 0.35 | 0.60 | 0.035 | 0.035 | 0.50-0.80 | 0.45-0.65 | - |
| TIAB SA 23 | 0.15 | 0.35 | 0.60 | 0.035 | 0.035 | 0.80-1.25 | 0.45-0.65 | - |
| STPA 24 | 0.15 | 0.50-1.00 | 0.60 | 0.035 | 0.035 | 1.00-1.50 | 0.45-0.65 | - |
| STPA 25 | 0.15 | 0.35 | 0.60 | 0.035 | 0.035 | 2.00-2.50 | 0.90-1.20 | - |
| TIAB SA 26 | 0.15 | 0.35 | 0.60 | 0.035 | 0.035 | 4.00-6.00 | 0.45-0.65 | - |
Tag nrho cov qib yog tua hlau nrog tswj cov ntsiab lus txhuas rau cov nplej refinement.
Kev tsim khoom
Txoj kev tsim khoom:
Hlau Ua:Hluav taws xob arc lossis cov pa hluav taws xob yooj yim nrog kev ua kom zoo dua qub
Ingot Casting:Tua steel nrog tswj solidification
Kub ua haujlwm:Piercing ntawm Mannesmann txheej txheem ua raws li kub dov los yog extrusion
Kev kho cua sov: Yuav tsum tau- Tag nrho cov kav dej yog kho cua sov:
STPA 12:Normalized los yog normalized thiab tempered
STPA 20-26:Normalized thiab tempered
Ua tiav:Ncaj, txiav, kuaj, tshuaj xyuas
Qhov Loj Loj:
Sab nraud txoj kab uas hla:10.5mm txog 900mm (≈ 0.4 "mus rau 35")
Phab ntsa Thickness:1.0mm txog 100mm
Ntev:Feem ntau 4-8m; ntev ntev mus txog 18m muaj
Kev kho cua sov yuav tsum tau
| Qib | Yuav tsum tau kho cua sov | Hom kub ntau yam |
|---|---|---|
| STPA 12 | Normalized, los yog Normalized & Tempered | Normalize: 880-950 degree Kub: 600-700 degree |
| STPA 20 | Normalized & Tempered | Normalize: 880-950 degree Kub: 630-730 degree |
| STPA 22 | Normalized & Tempered | Normalize: 900-980 degree Kub: 650-750 degree |
| TIAB SA 23 | Normalized & Tempered | Normalize: 900-1000 degree Kub: 680-780 degree |
| STPA 24 | Normalized & Tempered | Normalize: 900-1000 degree Kub: 680-780 degree |
| STPA 25 | Normalized & Tempered | Normalize: 900-1000 degree Kub: 680-780 degree |
| TIAB SA 26 | Normalized & Tempered | Normalize: 900-1050 degree Kub: 700-800 degree |
Lus Cim: Cov nqi cua txias thiab lub sij hawm tempering yog tswj kom ua tiav qhov tsim nyog microstructure.
Kev Ntsuas & Kev Ntsuam Xyuas Cov Cai
| Kuaj | Standard Reference (JIS) | Kev xav tau |
|---|---|---|
| Tensile Test | TIAB SA 2241 | Ib qho cua sov. Transverse specimens rau OD Ntau dua lossis sib npaug li 40mm. |
| Flattening Test | TIAB SA 2248 | Rau cov kav dej nrog OD Tsawg dua lossis sib npaug ntawm 50mm thiab phab ntsa <10% ntawm OD. |
| Hardness Test | TIAB SA 2245 | Feem ntau teev rau cov qib alloy los xyuas kom meej tempering. |
| Hydrostatic Test | JIS G 3455 Tshooj 8 | Yuav tsum tau.Siab siab tshaj los yog sib npaug rau 7 MPa los yog xam cov mis. |
| Kev kuaj tsis raug | UT, RT, lossis MT | Tej zaum yuav raug teev rau cov ntawv thov tseem ceeb. |
| Grain Size Test | TIAB SA 0551 | Feem ntau yuav tsum tau rau creep- qib resistant. |
| Siab -Tseem Tensile | TIAB SA 2271 | Tej zaum yuav raug teev rau kev tsim validation. |
Hydrostatic Test Siab:
Yam tsawg kawg nkaus:7 MPa ua(1,015 psi)
Muab xam: P=2×S×tDP=D2×S×t
Qhov twg S=70% ntawm min yield zog ntawm chav tsev kub
Dimensional Tolerances
| Dimension | Kev kam rau siab (Per JIS G 3455) |
|---|---|
| Sab nraud txoj kab uas hla | OD Tsawg dua lossis sib npaug 50 hli: ± 0.5 hli 50 < OD Tsawg dua lossis sib npaug 200 hli: ± 1.0% OD> 200 hli: ± 0.75% |
| Phab ntsa Thickness | +12.5%, -10% ntawm nominal phab ntsa |
| Ntev | Tsau ntev: +10 mm, 0 mm |
| Kev ncaj | Tsawg dua lossis sib npaug li 0.2% ntawm tag nrho qhov ntev |
| Qhov hnyav | ± 10% ntawm theoretical qhov hnyav rau ib leeg |
Daim ntawv thov
Primary Industries:
Kev tsim hluav taws xob:Main chav kab, kub reheat kab, superheaters, boiler raj
Petrochemical:Catalytic crackers, hloov dua siab tshiab, cua sov raj
Kev kho kom zoo:Siab -kub txheej txheem piping, hloov kab
Muaj boilers:High-siab tshuab tshuab
Cov nroj tsuag tshuaj:High -kub reactor systems
Cov Kev Pabcuam Tshwj Xeeb:
Superheated steam (>400 degree)
Cov roj kub thiab cov kua dej thermal
Cov txheej txheem gases ntawm qhov kub thiab txias
Thaum tshav kub kub hloov kua hauv exchangers
Siab -kev pabcuam kub hydrogen (nrog rau kev txwv)
Kev sib piv nrog International Standards
| Qib | JIS G3455 | ASTM sib npaug | DIN sib npaug | EN sib npaug |
|---|---|---|---|---|
| STPA 12 | C Tsawg dua lossis sib npaug 0.25%, 425℃max | A106 gr. C | ib 35.8 | P235GH |
| STPA 20 | 0.5Mo, 450℃max | A335 P1/T1 | 15 hmo 3 | 16 hmo 3 |
| STPA 22 | 0.5Cr-0.5Mo, 475℃max | A335 P2/T2 | 13CrMo4-5 | 13CrMo4-5 |
| TIAB SA 23 | 1Cr-0.5Mo, 500℃max | A335 P12/T12 | 14MOV 6-3 | 14MOV 6-3 |
| STPA 24 | 1.25Cr-0.5Mo-Si, 550℃max | A335 P11/T11 | 10CrMo9-10 | 10CrMo9-10 |
| STPA 25 | 2.25Cr-1Mo, 550℃max | A335 P22/T22 | 10CrMo9-10 | 10CrMo9-10 |
| TIAB SA 26 | 5Cr-0.5Mo, 600℃max | A335 P5/T5 | 12CrMo19-5 | 12CrMo19-5 |
Qhov zoo & Tshwj xeeb nta
Creep Resistance:Tshwj xeeb yog tsim los rau ntev - lub sij hawm siab - kub kev pab cuam
Microstructural Stability:Kev kho cua sov kom ruaj khov microstructure ntawm qhov kub thiab txias
Oxidation Resistance:Alloy qib tiv thaiv scaling ntawm qhov kub thiab txias
Quality Consistency:Japanese mills tswj nruj tswj kev kho cua sov
Cov ntaub ntawv:Cov ntawv tshaj tawm kev xeem suav nrog cov ntaub ntawv kho cua sov
Tsim & Fabrication Considerations
Vuam:
Preheat Yuav tsum tau:Rau txhua qib alloy (STPA 20-26)
Ncej -Kev kho cua sov: Yuav tsum taurau cov qib alloy los kho cov khoom
Filler hlau:Yuav tsum phim los yog overmatch puag hlau muaj pes tsawg leeg
Txheej Txheem Kev Tsim Nyog:Qhov tseem ceeb ntawm cov ntsiab lus alloy
Creep Design:
Tso cai rau kev ntxhov siab yog qhov kub thiab txias -nyob ntawm
Creep rupture cov ntaub ntawv muaj rau tsim
Kev xav txog kev ntxhov siab yog qhov tseem ceeb
Kev ntsuas cua sov yuav tsum raug ntsuas
Fabrication:
Khoov:Kub dabtsi yog khoov nyiam rau cov qib alloy
Kev tsim:nyuaj dua li carbon steel vim cov ntsiab lus alloy
Machining:Yuav tsum muaj cov cuab yeej tsim nyog thiab cov txheej txheem
Ntxuav:Yuav tsum tshem tawm txhua yam kab mob ua ntej kev pabcuam
Cov ntaub ntawv pov thawj & Traceability
Cov ntaub ntawv xav tau:
Mill Test Certificate:Tag nrho tshuaj ntsuam xyuas rau txhua yam
Cov ntaub ntawv kho cua sov:Lub sij hawm, qhov kub thiab txias, tus nqi txias
Mechanical Test Reports:Chav thiab qhov ntsuas kub siab yog tias tau teev tseg
Hydrostatic Test Records:Siab, lub sijhawm, tus neeg soj ntsuam
Traceability:Ua tiav cov saw hlau los ntawm yaj mus rau cov yeeb nkab tiav
Cov Lus Cog Tseg:
Chaw tsim tshuaj paus lub npe/trademark
Txheem (JIS G3455)
Qib (piv txwv li, STPA 24)
Loj (OD × phab ntsa thickness)
Kub naj npawb
Kev kho cua sov cim
Inspector lub cim
Ordering Information
Cov ntaub ntawv tseem ceeb Specification:
Standard & Qib:JIS G3455 STPA [Number]
Qhov Loj:OD (mm) × WT (mm) × Length (mm los yog m)
Kev kho cua sov:Qhia yog tias txawv ntawm tus qauv
Kev kuaj:Standard xeem thiab lwm yam kev xav tau ntxiv
Kev npaj kawg:Plain, beveled, los yog tshwj xeeb
Ntawv pov thawj:MTC cov cai (lus, hom)
Marking:Cov lus qhia tshwj xeeb cim
