Tianjin Brisk Metalwork Co., Ltd. yog ib qho ntawm cov ua lag luam thiab cov neeg muag khoom ntawm astm a572 lsaw structural steel yeeb nkab hauv Suav teb. Peb muaj lub ntiaj teb- cov cuab yeej tsim khoom thiab muaj peev xwm tsim tau zoo. Thov koj xav tias dawb mus yuav cov khoom ruaj khov astm a572 lsaw structural steel yeeb nkab los ntawm peb lub hoobkas.
Tianjin Brisk Steel yog ib qho ntawm cov tuam ntxhab ntawm Rectangular Steel Tube hauv Suav teb. Peb cov khoom raug xa tawm mus rau Middle East, Southeast Asia, Europe, New Zealand, thiab lwm thaj chaw.Yog tias koj xav paub ntau ntxiv txog peb cov khoom, thov hu rau peb thiab xa koj daim ntawv teev npe.
Product Core txhais
IbASTM A572 LSAW Steel Yeeb Nkabyog ib qho hnyav-phab ntsa, loj- txoj kab uas hla cov yeeb nkab tsim los ntawm High-Strength Low-Alloy (HSLA) columbium-vanadium steel. Nws yog qhov zoo li los ntawm kev ua kom txias txias- ua cov phaj hlau zoo thiab welded longitudinally siv cov txheej txheem kev ntseeg siab dual -sab Submerged Arc Vuam (SAW) txheej txheem.
Nkag siab txog LSAW Manufacturing
Standard Specifications & Material Chemistry
ASTM A572 Cov Qauv & Qib Ua Haujlwm
ASTM A572 yog tus qauv qhia tshwj xeeb rau High-Lub Zog Tsawg-Alloy Columbium-Vanadium Structural Steel. Nws npog tsib qib steel:Qib 42, Qib 50, Qib 55, Qib 60, thiab Qib 65.
Ntawm cov no,Qib 50 [345 MPa]yog lub ntiaj teb no benchmark rau cov qauv siv, muab tus nqi tshaj -zoo piv ntawm siab yield zog rau zoo weldability thiab atmospheric corrosion kuj.
Tshuaj muaj pes tsawg leeg (ASTM A572 Qib 50 vs. Common Qib)
Txhawm rau ua tiav lub zog siab yam tsis muaj kev vam khom cov ntsiab lus hnyav uas cuam tshuam rau kev sib txuas, ASTM A572 siv micro- alloying ntsiab xws li Columbium (Niobium, Nb) thiab Vanadium (V).
Txhawm rau ntsuas qhov weldability, cov kws tsim khoom siv cov qauv Carbon Equivalent Value (CEV):
Feem ntau, CEV Tsawg dua los yog sib npaug rau 0.43% qhia tau zoo heev weldability yam tsis muaj qhov tsim nyog ntawm qhov siab -kub preheating.
| Chemical Element | ASTM A572 Qib 42 (max %) | ASTM A572 Qib 50 (max %) | ASTM A572 Qib 60 (max %) |
| Cov pa roj carbon (C) | 0.21 | 0.23 | 0.26 |
| Silicon (Si) | 0.40 | 0.40 | 0.40 |
| Manganese (Mn) | 1.35 | 1.35 | 1.35 |
| Phosphorus (P) | 0.03 | 0.03 | 0.03 |
| Sulfur (S) | 0.03 | 0.03 | 0.03 |
| Columbium (Nb) / Vanadium (V) | Ntau dua lossis sib npaug rau 0.005 / Ntau dua lossis sib npaug rau 0.01 | Ntau dua lossis sib npaug rau 0.005 / Ntau dua lossis sib npaug rau 0.01 | Ntau dua lossis sib npaug rau 0.005 / Ntau dua lossis sib npaug rau 0.01 |
Mechanical Properties ntawm ASTM A572 LSAW Pipes
| Qib | Min. Yield zog (ReH) | Min. Tensile zog (Rm) | Min. Elongation hauv 2 nti (50.8mm) |
| Qib 42 | 290MPa (42 ksi) | 415MPa (60 ksi) | 20% |
| Qib 50 | 345MPa (50 ksi) | 450MPa (65 ksi) | 18% |
| Qib 55 | 380MPa (55 ksi) | 485 MPa (70 ksi) | 17% |
| Qib 60 | 415MPa (60ksi) | 520MPa (75 ksi) | 16% |
| Qib 65 | 450MPa (65ksi) | 550MPa (80 ksi) | 15% |
Qhov tseem ceeb Technical Advantages ntawm ASTM A572 LSAW Pipe
Xaiv LSAW kav hla lwm txoj kev tsim khoom tau txais txiaj ntsig zoo hauv kev tsim vaj tsev hnyav:
1. Tsawg Residual Stress ntawm Mechanical Expansion
Raws li tau tham nyob rau hauv cov txheej txheem mechanics, txias- tsim ua rau muaj kev kub ntxhov thiab compression kev ntxhov siab nyob thoob plaws cov yeeb nkab hla -section. Vim LSAW cov kav dej tau txais kev tshaj tawm -weldmechanical txias-expanding process, cov kev ntxhov siab sab hauv no sib npaug thiab txo qis.
Qhov no tiv thaiv tus qauv deformation (twisting, bowing, lossis springing) thaum lub sij hawm ntawm -site txiav, vuam, thiab siab - kev nyuaj siab load hloov.
2. Exceptional phab ntsa Thickness muaj peev xwm
Tsis zoo li Electric Resistance Welded (ERW) kav, uas feem ntau txwv rau phab ntsa thicknesses qis dua $20\\text{mm}$, LSAW kav tau yooj yim tsim nrog hnyav phab ntsa thicknesses mus txog rau.60mm lossis 80mm. Qhov no ua rau lawv muaj peev xwm txhawb nqa qhov loj axial compression loads uas yuav tsum tau rau siab -nce kem thiab tob-dej choj piers.
3. Nyob ze -Zoo meej Geometric Roundness thiab Ncaj
JCOE tsim cov xovxwm, ua ke nrog qhov kawg ntawm kev nthuav dav, xyuas kom meej tias qhov tawm ntawm - ntawm - roundness (ovalization) ntawm LSAW kav yog khaws cia zoo hauv qab 0.5% ntawm sab nraud txoj kab uas hla. High geometric roundness dramatically txhim kho lubkab buckling kujnyob rau hauv axial loading, tso cai rau engineers los tsim cov qauv los ze zog mus rau lub theoretical txwv ntawm steel yield zog.
4. Flawless Weld Zoo thiab Fatigue Resistance
Los ntawm kev siv automated multi-wire Submerged Arc Welding, longitudinal seam ua tiav 100% nkag mus nrog ib tug du, uniform weld reinforcement hlaws. Qhov tsis muaj qhov tsis xws luag (tshwj xeeb los ntawm 100% UT thiab RT kuaj) tiv thaiv kev ntxhov siab ntawm qhov vuam seam, muab cov yeeb nkab zoo zog tiv thaiv nyob rau hauv cyclic cua, yoj, lossis seismic loading.
Cov Ntsiab Lus Thov Cov Txheej Txheem
Qhov tshwj xeeb ntawm cov tshuab hneev taw ntawm ASTM A572 LSAW steel kav ua rau lawv tseem tsis tau muaj nyob hauv ntau qhov kev lag luam loj thiab cov qauv siv:
1. Deep Foundation Piling (High-Load Structural Piling)
Rau marine terminals, tob-dej ports, thiab skyscraper foundations, steel kav yuav tsum tau tsav mus tob rau hauv lub ntiaj teb los yog seabed. ASTM A572 Qib 50 LSAW cov kav dej yog cov qauv kev lag luam rau cov txheej txheem piling vim tias lawv tuaj yeem tiv taus lub zog loj loj ntawm pawg - tsav rauj yam tsis muaj buckling lossis sib cais ntawm cov seams.
2. Steel Tube kab hauv siab -Rise Buildings
Niaj hnub nimno skyscraper designs vam khom rau pob zeb -Filled Steel Tube (CFT) kab. Loj - txoj kab uas hla ASTM A572 LSAW kav ua haujlwm rau sab nraud steel plhaub. Lawv ua raws li siab - lub zog longitudinal reinforcement thaum tib lub sij hawm muab cov txheej txheem kaw rau lub siab - lub zog ua vaj tse, zoo heev txhim kho lub seismic ductility ntawm lub tsev.
3. Loj -Span Space Truss Structures
Rau lub tshav dav hlau davhlau ya nyob twg ru tsev, siab - chaw nres tsheb ciav hlau ceev, thiab cov chaw ua si loj loj, cov kws tsim qauv tsim qauv tsim peb - qhov chaw seem. Lub siab ncaj, huv si zoo nkauj, thiab nruj me ntsis kam rau ua ntawm LSAW kav ua rau lawv zoo meej rau cov node complex -rau-node vuam.
4. Offshore Jacket Platforms thiab Cua Turbine Foundations
Offshore cov qauv yog tsis tu ncua battered los ntawm cyclic yoj loads thiab corrosion. ASTM A572 LSAW kav yog siv los ua offshore tsho ob txhais ceg, kab pheeb ces kaum braces, thiab monopiles rau offshore cua turbines. Lawv qhov kev ntxhov siab qis qis tiv thaiv micro-kev pib tawg nyob rau hauv qhov tsis muaj zog marine qaug zog.
Comparative Analysis: LSAW vs. SSAW vs. ERW Pipes
Thaum yuav khoom loj - txoj kab uas hla cov kav dej, xaiv cov txheej txheem tsim khoom tsis raug tuaj yeem ua rau muaj kev cuam tshuam ntawm cov qauv lossis cov nqi hnyav dhau. Cov lus hauv qab no qhia txog kev sib piv engineering ntawm LSAW thiab lwm hom yeeb nkab:
| Feature / Metric | LSAW (Longitudinal SAW) | SSAW (Spiral SAW) | ERW (Electric Resistance Welded) |
| Kev tsim khoom Weld Seam | Ib leeg / Ob chav ncaj longitudinal seam | Nruam kauv helical seam | Siab - zaus induction longitudinal seam |
| Weld Length ib Meter | Yam tsawg kawg nkaus (1.0m ntawm weld ib meter ntawm cov yeeb nkab) | Siab (txog 1.5-2.0 m ntawm weld ib meter) | Yam tsawg kawg nkaus (1.0 m ntawm weld ib meter ntawm cov yeeb nkab) |
| Residual Stress Level | Tsawg heev(Relieved ntawm mechanical expansion) | Siab(High residual kev nyuaj siab los ntawm nruam kauv twisting) | Nruab nrab mus rau siab(Yuav tsum tau localized seam annealing) |
| Phab ntsa Thickness Range | tuab heev(6.0mm - 80.0 hli) | Nyias mus rau nruab nrab (6.0 mm - 25.4 mm) | Nyias mus rau nruab nrab (1.5 mm - 22.0 mm) |
| Geometric Qhov tseeb | Zoo heev(Zoo meej roundness & straightness) | Nruab nrab (Nyob rau kauv twisting thiab ovality) | Zoo (tsuas rau me me diameters) |
| Risk ntawm Local Buckling | Tsawg heev(Qhov zoo tshaj plaws rau cov kab hnyav) | Siab dua (Helical weld orientation txo cov ntshiab axial tsis kam) | Nruab Nrab (tsuas los ntawm thickness-rau- txoj kab uas hla) |
| Tus nqi Profile | Hwm (High - phaj zoo, ua haujlwm JCOE) | Kev lag luam (Tshuaj ncaj qha los ntawm kub-rolled steel coils) |
Kev lag luam siab heev (High-kev tsim khoom ceev, txwv me me ntau) |
Kev Txiav Txim Siab:Rau kev thauj khoom tseem ceeb- cov kab kabmob, cov piers choj, dynamic offshore cua monopiles, lossis siab - thaj chaw muaj kev pheej hmoo seismic,LSAW yog tib txoj kev xaiv raws li txoj cai. SSAW yuav tsum tau tshwj tseg rau qis- kev sib kis dej, kev tso dej, lossis qis- thauj khoom pab pawg.
Cov lus nug nquag nug (FAQ)
Q: Dab tsi yog qhov sib txawv ntawm qhov txias txias- tsim cov yeeb nkab thiab nthuav LSAW yeeb nkab hais txog qhov seem seem?
A: Tus qauv txias- tsim cov kav dej (xws li cov khoov ntawm chav tsev kub yam tsis muaj kev kho mob tom ntej) khaws qhov siab, tsis muaj kev ntxhov siab nyob ib puag ncig- feem ntau ncav cuag li 80% ntawm cov khoom siv lub zog tawm los, tshwj xeeb tshaj yog nyob ib ncig ntawm cov ces kaum ntawm square seem los yog cov seams ntawm unexpanded voj voog. Qhov no tuaj yeem ua rau cov yeeb nkab warp lossis caij nplooj ntoos hlav qhib thaum txiav.
Conversely, hwm LSAW kav dej undergo amechanical txias expansiontheem. Los ntawm kev ncab cov yeeb nkab radially dhau ntawm nws qhov kev txwv tsis pub dhau, kev tsim khoom -kev cuam tshuam cov kev ntxhov siab raug faib ua ib feem thiab txo qis rau ib feem ntawm lawv cov nqi qub, ua kom muaj kev ruaj ntseg zoo thaum lub sij hawm txiav thiab vuam.
Q: Vim li cas ASTM A572 Qib 50 nyiam tshaj tus qauv A36 cov qauv carbon steel?
A:
Txheem ASTM A36 steel muaj lub zog tawm ntawm 250 MPa (36 ksi), thaum ASTM A572 Qib 50 muab 345 MPa (50 ksi)-a38% nce hauv load-cov kabmob muaj peev xwm.
Los ntawm kev siv Qib 50, cov kws tsim qauv tsim tuaj yeem txo cov phab ntsa tuab thiab tag nrho cov hlau hnyav ntawm cov qauv los ntawm 20% mus rau 25% yam tsis muaj kev nyab xeeb. Qhov kev txo qhov hnyav no txo qis cov nqi ntawm cov khoom siv raw khoom, kev xa khoom / nqi thauj khoom, thiab cov kev xav tau ntawm pawg hauv paus, ua rau muaj txiaj ntsig zoo tshaj plaws ROI tag nrho.
Q: Yuav ua li cas weld seam kev ncaj ncees ntawm ASTM A572 LSAW yeeb nkab tau txheeb xyuas?
A: Weld kev ncaj ncees yog ruaj ntseg siv ntau -phase tswj raws tu qauv:
- Online UAS Automatic:Tiag - lub sij hawm ultrasonic kuaj xyuas cov vuam seam tam sim ntawd tom qab vuam.
- Phau ntawv UT:Ua los ntawm cov kws tshaj lij qib II / III tau lees paub los txheeb xyuas qhov tsis txaus ntseeg uas tau teev tseg los ntawm lub tshuab tsis siv neeg.
- Radiographic Testing (RT/X-Ray):Siv los tshuaj xyuas cov kev sib tshuam ntawm cov hlua khi thiab cov yeeb nkab kawg txhawm rau txhawm rau txhawm rau txhawm rau ntsuas qhov tsis zoo xws li roj porosity, slag suav nrog, lossis tsis muaj fusion.
- Kev Ntsuas Hydrostatic:Cov yeeb nkab yog ntim nrog dej thiab pressurized los xyuas kom meej lub cev.
Q: Puas yog qhov ntev ntawm qhov vuam seam ntawm LSAW yeeb nkab sawv cev rau qhov tsis muaj zog ntawm cov qauv?
A: Tsis yog. Nyob rau hauv cov yeeb nkab LSAW kws tshaj lij, lub vuam seam yog tiag tiagmuaj zog duatshaj niam txiv hlau phaj. Vim hais tias ntawm ntau-wire submerged arc vuam txheej txheem thiab siab -qib weld consumables siv, cov weld deposit ua tiav ib tug tshaj- sib piv yield thiab tensile zog piv rau lub hauv paus phaj.
Thaum lub sij hawm ntsuas tensile tus qauv ntawm LSAW yeeb nkab qauv, qhov tawg tsis tu ncua tshwm sim hauv cov niam txiv hlau, nyob deb ntawm thaj tsam weld. Tsis tas li ntawd, vim tias LSAW welds khiav nruj me ntsis rau tib lub sijhawm ntev, lawv ua raws li cov kev taw qhia ntawm compressive stresses nyob rau hauv txhua kab, txo qis shear rog hla txoj kab weld.
Cim npe nrov: Tuam Tshoj astm a572 lsaw structural steel yeeb nkab manufacturers, lwm tus neeg, Hoobkas
