1.Cov lus nug: Dab tsi yog cov khoom siv hlau nplaum uas siv los ua LSAW Yeeb Nkab, EFW Yeeb Nkab, ERW Yeeb Nkab, thiab HFW Yeeb Nkab? Cov qhab nia tseem ceeb yog dab tsi?
1.Cov lus teb: Tag nrho plaub hom welded kav siv carbon structural steel thiab qis- alloy siab- lub zog steel raws li lawv cov khoom tseem ceeb. Cov qib sib txawv nyob ntawm daim ntawv thov: dav dav - cov pa roj carbon monoxide muaj xws li Q235B thiab Q195-L, haum rau kev thauj mus los zoo tib yam; qis- alloy siab{13}}lub zog steels suav nrog Q355B (yav tas los Q345B) thiab X42-X80 (pipeline steel), haum rau siab- siab thiab ntev- cov kav dej sib txawv; rau cov ntawv tshwj xeeb, LSAW Yeeb Nkab feem ntau siv X100-X120 ultra-high-strength pipeline steel, HFW yeeb nkab feem ntau siv cov ntaub ntawv corrosion-resistant xws li 09CrCuSb, EFW Yeeb Nkab feem ntau siv precision carbon steel, thiab ERW Pipe npog tag nrho cov khoom uas tau hais los saum toj no, muab qhov kev hloov tau zoo tshaj plaws.
2.Nrhiav: Dab tsi yog phab ntsa thickness ntau ntawm LSAW Yeeb Nkab? Nws cov phab ntsa thickness txawv li cas ntawm peb hom welded kav?
2.Cov lus teb: LSAW cov kav dej muaj phab ntsa tuab ntawm 6.3mm-60mm, feem ntau ua cov kav dej tuab -walled kav; qee cov txheej txheem tshwj xeeb tuaj yeem tsim cov kav dej ultra- tuab- phab ntsa mus txog 80mm tuab. HFW cov kav dej muaj phab ntsa tuab ntawm 1.2mm{11}}12.7mm, feem ntau nyias-walled thiab nruab nrab-nyias- cov kav dej. ERW kav dej muaj phab ntsa tuab ntawm 1.5mm-25mm, me ntsis dav dua HFW kav. EFW kav dej muaj qhov nqaim tshaj plaws phab ntsa thickness ntau, los ntawm 2.0mm-8.0mm, teej tug mus rau nyias-walled precision welded kav, thiab tsis tuaj yeem tsim cov khoom tuab-walled.
3.Cov lus nug: Dab tsi yog qhov kev sib raug zoo ntawm lub zog vuam thiab lub hauv paus hlau lub zog ntawm plaub hom welded kav? Qhov twg welded yeeb nkab muaj lub zog weld ze tshaj ntawm cov hlau puag?
3.Cov lus teb: Txoj cai tseem ceeb yog: HFW Yeeb Nkab> EFW Yeeb Nkab> ERW Yeeb Nkab> LSAW Yeeb Nkab. HFW cov kav dej ua tiav qhov muaj zog ntawm 95% -105% ntawm lub hauv paus hlau lub zog. High- zaus cua sov ceev tiv thaiv overheating thiab softening ntawm lub hauv paus hlau, uas ua rau qhov zoo tshaj plaws microstructure sib xws thiab ze tshaj lub zog ntawm lub weld thiab lub hauv paus hlau. EFW cov kav dej ua tiav qhov kev sib tw ntawm 90% -98% ntawm lub hauv paus hlau lub zog vim kev tswj cov txheej txheem fusion meej. Ib txwm ERW cov kav dej tau ua tiav qhov kev sib tw ntawm 85% -95% ntawm lub hauv paus hlau lub zog, muaj kev poob qis vim qhov cuam tshuam ntawm vuam tam sim no zaus. LSAW cov kav dej, vim muaj cov cua kub nkag ntawm submerged arc vuam thiab thaj chaw muaj cua sov loj hauv lub hauv paus hlau, muaj qhov sib txuas ntawm tsuas yog 80% -90% ntawm lub hauv paus hlau lub zog, sawv cev qhov sib txawv loj tshaj plaws ntawm lub zog vuam thiab lub hauv paus hlau lub zog ntawm plaub hom.
4.Ntiaj teb: Dab tsi yog cov yam ntxwv ntawm kev kub siab thiab corrosion kuj rau LSAW kav, EFW kav, thiab ERW / HFW kav?
4.Cov lus teb: Hais txog kev ua haujlwm siab: LSAW Yeeb Nkab (thick-walled, loj-}inch) > HFW Yeeb Nkab > ERW Yeeb Nkab > EFW Yeeb Nkab. LSAW Yeeb Nkab yog tsim rau siab - cov kav dej siab siab tshaj 10MPa (xws li ntev - cov kav dej thiab cov roj kav ntev), HFW Yeeb Nkab yog tsim rau nruab nrab- cov xwm txheej siab ntawm 2-8MPa, ERW Yeeb Nkab yog tsim rau 1-5MPa tsuas yog qis dua, scenarios ntawm 0.5-3MPa. Hais txog corrosion kuj: Tsis muaj plaub hom welded kav inherently muaj corrosion kuj; nws nyob ntawm cov khoom siv los yog txheej. HFW Yeeb Nkab yog yooj yim yoog rau galvanizing thiab anti-corrosion txheej txheej txheem, nrog muaj zog txheej adhesion. ERW Yeeb Nkab yog qhov zoo tshaj plaws thib ob. LSAW Yeeb Nkab muaj txheej txheem txheej txheej txheej txheej txheej txheej txheej nyuaj dua, thiab EFW Yeeb Nkab muaj qhov tsis muaj zog me ntsis tag nrho corrosion tsis kam vim yog cov txheej txheej nyias nyias tau yooj yim puas.
5.Cov lus nug: Qhov dav ntawm tshav kub yog dab tsi - thaj tsam cuam tshuam ntawm LSAW Yeeb Nkab? Dab tsi yog nws qhov zoo thiab qhov tsis zoo piv rau ERW / HFW Pipe?
5.Cov lus teb: Lub tshav kub- cuam tshuam cheeb tsam (HAZ) qhov dav ntawm LSAW kav yog 2-5mm vim muaj cov cua kub loj (feem ntau 1.5-3.0kJ/mm) hauv submerged arc vuam, ua rau HAZ dav dua. HFW kav dej muaj HAZ dav ntawm tsuas yog 0.5-1.5 hli, nrog rau cov cua kub ntau zaus, ua rau HAZ nqaim. ERW kav dej (tseem siv tsawg zaus vuam) muaj HAZ dav ntawm 1-3 hli, ntog ntawm ob. Qhov zoo thiab qhov tsis zoo ntawm HAZ dav: Lub nqaim HAZ yog qhov zoo dua, txo cov kev hloov pauv ntawm cov khoom siv hauv paus thiab txhim kho tag nrho cov toughness thiab qaug zog tsis kam ntawm cov yeeb nkab. Yog li ntawd, cov kav dej HFW yog qhov zoo tshaj rau LSAW kav hauv HAZ tswj, nrog rau cov kav dej ERW ua tau zoo me ntsis.
