Q345 Tsawg-Tsuas Kub Seamless Carbon Steel Kub-Rolled Pipes
--Lub pob txha ruaj khov rau cov kav dej hauv kev pabcuam txias txias
Lus piv txwv: Txias tsis yog ib qho teeb meem - Nws yog peb qhov pov thawj sib ntaus sib tua
Hauv kev tsim hluav taws xob, qhov kub tsis tshua muaj ib txwm yog qhov tseem ceeb "kev faib kab" rau kev xaiv cov khoom siv. Thaum lub ambient kub poob qis dua -20 degree, qhov cuam tshuam toughness ntawm cov pa roj carbon zoo tib yam deteriorates sharply, thiab txoj kev pheej hmoo ntawm brittle fractures nce exponentially - tshwj xeeb tshaj yog nyob rau hauv weld seams thiab kev ntxhov siab -chaw zones. Peb Q345 qis-kub seamless carbon steel kav yog cov txheej txheem kev daws teeb meem tsim los daws qhov kev sib tw no, sib txuas cov khoom ua kom zoo tshaj plaws nrog cov tshuab kub dov.
Peb nkag siab tag nrho tias cov roj xa hluav taws xob hla lub permafrost, qhov chaw nres nkoj LNG nyob rau hauv thaj tsam siab -latitude, lossis cheeb tsam cua sov network nyob rau sab qaum teb metropolis - cov tshuab no nqa deb tshaj li xov xwm yooj yim; lawv ris lub zog ruaj ntseg, kev noj qab haus huv rau pej xeem, thiab kev sov siab ntawm ntau lab tsev neeg. Yog vim li ntawd peb yeej tsis khom rau "zoo txaus." Es tsis txhob, peb hais rauquantifiable low -kub toughness, tag nrho traceable zoo tswj, thiab meej, customizable xa- txhim kho lub hauv paus ruaj khov rau txhua qhov dej txias - kev pabcuam kav dej.
Material Superiority: Deep Optimization los ntawm Grain mus rau Kev Ua Haujlwm
Q345 qib yog tsim raws liGB/T 1591 "High-Strength Low-Alloy Structural Steels", nrog nws lub tswv yim tseem ceeb hauv paus hauv "micro-alloying + tswj dov thiab tswj kom txias":
Grain Refinement Mechanism: Los ntawm kev ntxiv micro-alloying cov ntsiab lus xws li niobium (Nb, Tsawg dua lossis sib npaug li 0.07%), vanadium (V, Tsawg dua lossis sib npaug li 0.15%), thiab titanium (Ti, Tsawg dua lossis sib npaug li 0.20%), nplua carbonitride precipitates raug tsim thaum kub dov. Cov no zoo pin lis ciam teb tsiv teb tsaws, refining ferrite grain loj rauQib 9-12 (ASTM txuj). Lub microstructure refined ib txhij txhim kho ob qho tib si lub zog thiab toughness - lub cev lav rau qis -kub los tiv thaiv.
Ntsuas qhov qis-Tub kub cuam tshuam Toughness: Ntawm -40 degree, Charpy V-notch cuam tshuam absorbed zog (Akv) tsis tu ncua mus txogNtau dua lossis sib npaug li 60 J- Ntau tshaj qhov GB / T 1591 qhov yuav tsum tau muaj ntawm Ntau dua lossis sib npaug rau 27 J rau Q345D qib. Qee qhov kev kub siab tshaj plaws txawm tias ua tiav 80 J lossis siab dua. Qhov no txhais tau hais tias txawm tias nyob rau hauv cov xwm txheej tam sim no (xws li, lub ncov qaumteb qabteb tsis zoo lossis cov tub yees tso tawm), cov yeeb nkab khaws cia kom muaj zog txaus.
Ductile-rau-Brittle Transition Temperature (FATT): Los ntawm kauj ruam- ntsuas qhov ntsuas kub, FATT ntawm cov khoom siv no tau txheeb xyuas kom ruaj khov hauv qab no-55 degree, xyuas kom meej tias ntawm -40℃kev pabcuam kub cov khoom siv ua haujlwm zoo nyob rau hauv thaj tsam saum txee toughness - qhov tseem ceeb tshem tawm qhov kev pheej hmoo ntawm kev puas tsuaj ntawm cov pob txha tawg.
Sab-los ntawm- sab piv nrog Q235B zoo tib yam thiab 20 # steel kav:
| Performance Indicator | Q345 Tsawg-Temp Pipe | Ordinary 20 # Yeeb Nkab | Q235B welded yeeb nkab |
|---|---|---|---|
| Lub zog cuam tshuam ntawm -40℃(Akv) | Ntau dua lossis sib npaug li 60 J | 15 ~ 25 J (ntse poob) | 10~20 J |
| Tensile zog Rm (MPa) | 470–630 | 410–530 | 375–500 |
| Yield zog ReL (MPa) | Ntau dua lossis sib npaug rau 345 (tsawg dua lossis sib npaug rau 16mm) | Ntau dua lossis sib npaug li 245 | Ntau dua lossis sib npaug rau 235 |
| FATT (kwv yees) | Tsawg dua los yog sib npaug rau -55 degree | Qhov kub ntawm qhov kub thiab txias ntawm qhov kub ntawm qhov kub ntawm -20 degrees | Qhov ntsuas kub ntawm qhov ntsuas kub ntawm qhov ntsuas kub yog -10 degree |
| Qhov kev pabcuam kub tsawg kawg nkaus | -45℃(ntev) | Tsis pom zoo hauv qab -20 degree | Tsis pom zoo hauv qab -10 degree |
Xaus: Q345 qis-kub seamless yeeb nkab ua tiav qhov kev sib npaug ntawm lub zog, ductility, thiab qis- qhov kub thiab txias - ua rau nws nyiam tus nqi- zoo rau kev kho dua tshiab ntawm cov pa roj carbon steel hauv qhov chaw txias.
Cov ntawv thov thiab Engineering Adaptability
| Kev lag luam sector | Cov kev pabcuam tshwj xeeb | Qhov laj thawj rau kev xaiv |
|---|---|---|
| Petrochemical | Condensate rov qab, qis -temp txheej txheem kab, dej txias circuits | Resistant chav / dej yaig; tsis muaj nkig tsis ua hauj lwm thaum lub caij txias kaw |
| Cheeb tsam cua sov | Primary HT hot-dej networks (DN200–DN600), theem nrab LT networks | Sib npaug siab -temp creep zog nrog txias- pib toughness nyob rau lub caij ntuj no |
| LNG / LPG Cia | Vaporizer kua-phase kav, BOG (boil-tawm roj) cov kab rov qab | Feem ntau tus nqi -kev xaiv seamless zoo rau -40℃rau -162℃kev pabcuam |
| Mining | High-density backfill lines, underground dewatering systems | Resistant khov-thaw cycling; Ntau phab ntsa thickness rau corrosion pub |
| Marine & Offshore | Lub cav txias, lub tshuab hluav taws xob, cov hluav taws kub hnyiab- sib ntaus sib tua | Chav kawm ntawv pov thawj muaj; withstands marine huab cua thiab qis -temp dej hiav txwv |
| Lub zog tiam | Pa cua txias (nuclear), auxiliary txias (thermal nroj tsuag) | Ua tau raws li RCC-M lossis ASME ntxiv rau qis- qhov yuav tsum tau muaj qhov kub thiab txias |
Size Range & Customization Services
Peb muab ib tug dav spectrum ntawm tiav cov yeeb nkab qhov ntev:
OD ntauLoj: 12mm-914mm
NtevStandard: 6m / 9m / 12m; kev cai ntev txog li 18m (raws li kev thauj mus los txwv)
Xaus kev ua tiav: Plain xaus, beveled (V-type/U-type/compound), threaded los yog grooved raws li kev thov
Tus nqi - ntxiv cov kev pabcuam: Pickling & passivation, xeb -kev tiv thaiv oiling, kev cai stenciling, ntoo rooj plaub los yog steel-framed export ntim
Yam tsawg kawg nkaus kom muaj nuj nqis: Ntau dua lossis sib npaug li 5 tons ib qho tshwj xeeb rau kev tsim khoom; me -batch mus sib hais kuj txais tos.
Xaiv qhov Project References
| Tuam Tshoj-Russia Eastern Gas Pipeline (txoj kab) | Tsawg- qhov kub thiab txias valve chaw nres tsheb hla cov kav dej, siv Φ273 × 8mm Q345E (-40℃cuam tshuam). Tshaj 100 lub caij txias pib / nres hauv ob xyoos - xoom xau kaw. |
| Inner Mongolia CHP District Heating Project | Lub hauv paus network mainline DN500, nrog rau lub caij ntuj no txias ntawm -38 degree. Ua tiav peb lub caij cua sov uas tsis muaj qhov txias txias. |
| Guangdong LNG Satellite Chaw nres tsheb | Vaporizer inlet / qhov hluav taws xob qis -temp kua seem, siv Φ159 × 6mm Q345D. Nrog typhoon cuam tshuam thiab refrigerant drills nrog kev ruaj ntseg zoo. |
Kev cog lus thiab kev pabcuam lav
Ua ntej- kev txhawb nqa kev muag khoom: Cov yeeb nkab pub dawb- ntsuas qhov loj me, phab ntsa- txheeb xyuas qhov tuab, thiab nthuav dav- cov lus pom zoo sib koom ua ke.
Lub sijhawm ua haujlwm: Txheem qhov ntau thiab tsawg hauv Tshuag - xa hauv 3 hnub ua haujlwm; kev tsim khoom hauv 15-25 hnub.
Tom qab -muag teb: Kev daws teeb meem hauv 24 teev rau cov teeb meem zoo; ntawm -kev pab hauv 48 teev yog tias tsim nyog.
Nqe lus kaw
Qhov kub thiab txias tsis yog "tsis paub qhov txawv" rau cov kav dej - nws yog ib qho kev xam pom tseeb thiab kev tshawb fawb tswj tau "txhua yam xwm txheej." Q345 qis-kub seamless kub- dov carbon steel kav yog cov hauv paus hauv cov qauv GB paub tab, txhawb nqa los ntawm kev tswj cov txheej txheem nruj, thiab tau lees paub los ntawm cov ntaub ntawv ntsuas kub tsawg -. Tej zaum lawv yuav tsis yog qhov kev xaiv kim tshaj plaws, tab sis lawv yog qhov tseebqhov zoo tshaj qhov sib npaug ntawm kev ntseeg tau thiab tus nqi -effectivenessnyob rau hauv txias- chaw ua haujlwm.
Cim npe nrov: low-kub seamless carbon steel kub- dov kav, Tuam Tshoj qis-kub seamless carbon steel kub- dov kav manufacturers, lwm tus neeg, Hoobkas
