1. Lus nug:Dab tsi yog qhov txawv ntawm seamless thiab welded kav ntawm ASTM A106 Qib B, thiab thaum twg koj yuav tsum xaiv cov welded version?Teb:Qhov sib txawv tseem ceeb ntawm seamless thiab welded ASTM A106 Qib B kav yog lawv cov txheej txheem tsim khoom: seamless kav yog tsim los ntawm tho ib lub pob zeb thiab dov mus rau hauv lub raj hollow, thaum welded kav yog tsim los ntawm dov steel phaj rau hauv ib lub cylindrical zoo thiab welding seam. Welded A106 Qib B kav feem ntau yog tus nqi ntau dua - zoo dua cov kav dej seamless, tshwj xeeb tshaj yog rau cov kab uas muaj npe loj dua (siab dua 12 ntiv tes), vim lawv xav tau cov khoom siv raw thiab kev tsim khoom yooj yim dua. Koj yuav tsum xaiv cov welded version thaum daim ntawv thov cuam tshuam nrog qis mus rau nruab nrab siab (txog 370 degree) thiab tsis tas yuav muaj qhov siab tshaj plaws ntawm cov qauv kev ncaj ncees- xws li hauv dej, xa tawm, thiab cov kav dej dav dav. Cov kav dej seamless yog nyiam rau siab - siab, siab - daim ntawv thov kub (xws li, fais fab nroj tsuag) qhov uas tsis muaj vuam seam yuav txo tau txoj kev pheej hmoo ntawm tsis ua hauj lwm.
2. Lus nug:Cov ntsiab lus carbon ntawm ASTM A333 Qib 6 welded steel kav yuav ua li cas cuam tshuam rau lawv qhov qis- qhov kub thiab txias, thiab cov ntawv thov twg xav tau qib no?Teb:ASTM A333 Qib 6 welded steel kav muaj cov pa roj carbon tsawg (C Tsawg dua lossis sib npaug li 0.18%), uas txhim kho lawv qhov qis - kub toughness thiab tsis kam rau nkig tawg. Cov ntsiab lus qis dua yuav txo qhov tsim ntawm nkig carbides, tso cai rau cov yeeb nkab kom tswj tau qhov ductility txawm tias qhov kub thiab txias li -45℃(-49℃F). Cov qib no tshwj xeeb yog tsim los rau cov ntawv thov kub qis, suav nrog kev khaws cia cryogenic thiab kev thauj mus los ntawm cov roj liquefied (piv txwv li, LNG, kua nitrogen), nrog rau cov kav dej hauv cov huab cua txias (piv txwv li, cov roj av arctic thiab cov kav xa hluav taws xob, cov nroj tsuag tub yees). Cov ntsiab lus tsis tshua muaj carbon kuj txhim kho weldability, kom ntseeg tau tias cov vuam seam khaws cov khoom qis qis dua li cov hlau puag.
3. Lus nug:Dab tsi yog qhov yuav tsum tau welding rau API 5L X52 welded kav, thiab qhov vuam zoo thiab kev ncaj ncees raug txheeb xyuas li cas?Teb:API 5L X52 welded kav yuav tsum nruj vuam tswj kom muaj zog thiab kav ntev. Cov txheej txheem vuam yuav tsum siv cov hlau muab tub lim sib haum nrog X52 cov tshuaj lom neeg muaj pes tsawg leeg (xws li ER70S-6 rau GMAW, E7018 rau SMAW) thiab tswj cov cua sov kom zoo kom tsis txhob muaj cua sov lossis cua sov, uas tuaj yeem ua rau cov vuam tsis muaj zog. Pre-weld tu (tshem tawm xeb, roj, thiab khib nyiab) thiab preheating (yog tias xav tau rau cov phab ntsa tuab) kuj yuav tsum tau ua. Weld zoo thiab kev ncaj ncees raug txheeb xyuas los ntawm ntau qhov kev ntsuam xyuas: kev tshuaj xyuas qhov muag (kom kuaj xyuas qhov tsis xws luag xws li cov kab nrib pleb, porosity, thiab tsis tiav fusion), ultrasonic kuaj (UT) txhawm rau txheeb xyuas cov teeb meem sab hauv, kuaj hluav taws xob (RT) rau cov ntawv thov tseem ceeb, thiab kev ntsuam xyuas tensile thiab khoov kom paub meej tias cov khoom siv. Tsis tas li ntawd, weld seam yuav tsum ua tau raws li API 5L cov qauv rau qhov raug thiab cov hlaws hlaws profile.
4. Lus nug:Dab tsi yog qhov kev tiv thaiv corrosion ntawm Qib 316L stainless hlau welded kav, thiab "L" cov lus cuam tshuam li cas rau lawv cov kev ua tau zoo piv rau qib 316?Teb:Qib 316L stainless hlau welded kav dej muaj kev tiv thaiv corrosion zoo heev, tshwj xeeb tshaj yog tiv thaiv acidic, alkaline, thiab chloride- muaj ib puag ncig. Lawv muaj 16-18% chromium (Cr), 10-14% npib tsib xee (Ni), thiab 2-3% molybdenum (Mo), uas tsim cov txheej txheem oxide passive rau ntawm qhov chaw tiv thaiv corrosion. Cov lus "L" qhia txog cov ntsiab lus qis qis (C Tsawg dua lossis sib npaug li 0.03%), uas txawv ntawm cov qauv Qib 316 (C Tsawg dua lossis sib npaug li 0.08%). Cov ntsiab lus qis dua no txo qhov kev pheej hmoo ntawm kev sib tsoo ntawm kev sib tsoo (IGC) thaum vuam thiab kho cua sov, vim nws txo qis kev tsim cov chromium carbides ntawm cov ciam teb-cov carbides tuaj yeem deplete thaj tsam ntawm chromium, ua rau cov txheej txheem tsis muaj zog. 316L yog li nyiam nyob rau hauv daim ntawv thov qhov twg vuam yuav tsum tau thiab corrosion kuj, xws li tshuaj lom neeg kev lag luam.
5. Lus nug:Dab tsi yog cov ntawv thov ntawm JIS G 3454 Qib STK 400 welded steel kav, thiab cov khoom siv dab tsi ua rau lawv haum rau cov kev siv no?Teb:JIS G 3454 Qib STK 400 welded steel kav feem ntau yog siv rau hauv cov qauv siv, xws li lub tsev thav duab, txuas hniav, scaffolding, thiab cov cuab yeej siv cuab yeej txhawb nqa, nrog rau hauv qis - kev thauj mus los ntawm cov kua (piv txwv li, dej, cua). Lawv cov khoom tseem ceeb muaj xws li lub zog tensile Ntau dua lossis sib npaug ntawm 400 MPa, lub zog tawm los Ntau dua lossis sib npaug li 245 MPa, thiab elongation Ntau dua lossis sib npaug li 21%. Cov khoom no ua rau lawv tsim nyog rau kev siv cov qauv vim tias lub zog tensile siab ua kom lawv tuaj yeem tiv taus cov khoom hnyav, thaum lub zog nruab nrab ntawm lub zog thiab zoo elongation muab ductility thiab tsis kam rau deformation. Tsis tas li ntawd, STK 400 cov kav dej muaj qhov sib txuas zoo, tso cai rau kev sib dhos yooj yim rau hauv cov txheej txheem nyuaj, thiab lawv raug nqi - zoo dua piv rau qib siab dua - cov qauv hlau, ua rau lawv muaj kev xaiv nrov hauv kev tsim kho thiab kev siv lub teeb.
