Dab tsi yog Classification Societies?
Cov koom haum kev faib tawm yog ywj siab, tsis yog -tsoomfwv cov koom haum kev tshaj lij uas tsim thiab tswj cov qauv kev tsim kho, kev tsim qauv, thiab kev saib xyuas cov nkoj thiab cov chaw nyob sab nraud. Dating rov qab mus rau lub xyoo pua 18th, cov koom haum no tau tsim feem ntau los muab cov neeg tuav pov hwm marine thiab cov tswv nkoj nrog lub hom phiaj kev ntsuas ntawm lub nkoj seaworthiness. Niaj hnub no, thaum lawv cov peev txheej tau nthuav dav mus rau hauv cov qauv kev sib tw digital, lwm cov roj hluav taws xob, thiab lub zog txuas ntxiv mus, lawv lub hom phiaj tseem ceeb tseem tsis tau hloov pauv: kev tiv thaiv tib neeg lub neej, khoom vaj khoom tsev, thiab ib puag ncig marine.
Txhawm rau kom muaj kev sib raug zoo thoob ntiaj teb, cov koom haum kev faib tawm loj tau koom tes los ntawm International Association of Classification Societies (IACS). IACS tsim cov Kev Cai Sib Koom Tes (UR) uas tsim cov qauv kev qhia yam tsawg kawg nkaus thoob plaws txhua lub koom txoos. Rau cov khoom siv steel hlau, lub hauv paus tswj hwm feem ntau txhais raws li IACS UR W11, uas tswj hwm cov kev cai rau kev tsim khoom, txwv tsis pub tshuaj, kev sim tshuab, thiab qhov ntev ntev rau qhov qub thiab siab dua - lub zog steel phaj.
Lub neej voj voog ntawm Mill Certification
Daim ntawv pov thawj kev faib tawm rau Shipbuilding Steel Phaj tsis yog cov ntaub ntawv tsim tawm thaum kawg ntawm kev tsim khoom. Nws sawv cev rau qhov tshwm sim ntawm cov txheej txheem kev ruaj ntseg zoo txuas ntxiv uas pib ntev ua ntej ib qho tshwj xeeb batch ntawm cov hlau yog nchuav.
Kev Pom Zoo thiab Txheej Txheem:Ua ntej lub zeb zeb tuaj yeem tsim cov ntawv pov thawj marine steel, nws cov kab tsim khoom yuav tsum tau soj ntsuam nruj thiab kev pom zoo los ntawm cov neeg hauv chav kawm. Cov neeg soj ntsuam ntsuam xyuas cov cuab yeej siv hluav taws xob (xws li Basic Oxygen Rauv lossis Hluav Taws Xob Arc Rauv), ladle refining muaj peev xwm, nruam casting txoj kev, dov mills, thiab cov khoom siv kho cua sov (xws li Thermo-Mechanical Controlled Processing, lossis TMCP).
Quality Audits:Lub zeb yuav tsum ua kom pom tag nrho cov metallurgical tswj, ua kom tiav cov cua sov- mus rau - cov tshuaj lom neeg ua kom sov, thiab muaj kev tswj xyuas zoo hauv kev ua raws li cov qauv thoob ntiaj teb.
Thib peb-Kev soj ntsuam tog:Thaum lub sijhawm tsim khoom tiag tiag, cov kws tshawb fawb hauv chav kawm ywj pheej feem ntau ua pov thawj cov qauv, kev sim tshuab, tsis yog -kev ntsuas kev puas tsuaj, thiab kev tshuaj xyuas saum npoo ntawm - qhov chaw ntawm lub zeb.
Muab Daim Ntawv Pov Thawj Mill Test (MTC):Thaum lub tshav kub los yog batch ntawm steel ua tau raws li tag nrho cov kev cai hauv chav kawm ntawv, cov kev faib pawg neeg teeb meem los yog pom zoo ib tug official cov ntaub ntawv pov thawj. Cov ntaub ntawv no taug qab cov phaj hlau ncaj qha rov qab mus rau nws qhov qub ladle tshuaj tshuaj ntsuam xyuas, cov txiaj ntsig kev ntsuas tshuab, thiab tus lej kub tshwj xeeb.
Cov khoom siv qib, cov txheej txheem xeem, thiab cov kev xav tau zoo
Marine hull cov qauv xav tau cov yam ntxwv ua haujlwm zoo uas mus deb tshaj tus qauv qauv carbon steel siv nyob rau hauv onshore pej xeem kev tsim kho. Yog li ntawd, kev faib cov cai faib marine structural steel rau hauv cov pawg muaj zog thiab cov qib toughness.
Qeb Muaj Zog thiab Kub Toughness Qib
Shipbuilding steel yog ib qho tseem ceeb categorized los ntawm yield zog rau hauv ib txwm muaj zog steel (nominal yam tsawg kawg nkaus yield zog ntawm 235 Megapascals) thiab siab zog steel (nominal yam tsawg kawg nkaus yield zog ntawm 315, 355, 390, 460, los yog siab dua Megapascals).
Nyob rau hauv txhua pawg muaj zog, cov qauv hlau tau tawg ntxiv rau hauv cov qib zoo sib txawv raws li lawv qhov kev sib tw toughness -tshwj xeeb, lawv lub peev xwm los nqus lub zog thaum muaj kev cuam tshuam rau kev thauj khoom ntawm qhov kub thiab txias yam tsis muaj kev tawg tawg:
Qib Siab Lub Zog: Qib A (kuaj ntawm ambient kub lossis +20 degree), Qib B (kuaj ntawm 0 degree), Qib D (kuaj ntawm -20 degree), thiab Qib E (kuaj ntawm -40 degree).
Qib Siab Zog: Cov no muaj cov lus qhia ua ntej sib piv lawv lub zog tawm los (xws li A, D, E, thiab F) ua ke nrog lawv lub zog tsim. Piv txwv li, Qib AH36, DH36, EH36, thiab FH36 txhua tus muaj qhov tsawg kawg nkaus lub zog ntawm 355 Megapascals, tab sis lawv cov Charpy V-notch cuam tshuam qhov ntsuas kub sib txawv: AH36 raug kuaj ntawm 0 degree, DH36 ntawm -20 degree, EH36, ntawm -40 degree.
Rau cov icebreakers, polar nkoj, thiab offshore platforms ua hauj lwm nyob rau hauv frigid seas, siv tsis tshua muaj heev - qib kub zoo li EH36 los yog FH36 xyuas kom meej tias lub nkoj tseem ductile thiab resistant rau kev puas tsuaj tawg txawm tias muaj kev cuam tshuam hnyav rau dej hiav txwv.
Mechanical and Chemical Test Protocols
Yuav kom tau txais daim ntawv pov thawj kev faib tawm, txhua pawg tsim khoom ntawm Shipbuilding Steel Phaj yuav tsum tau ua raws li kev siv tshuab thiab tshuaj lom neeg nruj:
Tensile thiab Yield Testing: Txheeb xyuas qhov kawg tensile lub zog, tawm los taw tes, thiab elongation feem pua los xyuas kom meej cov qauv load peev xwm nyob rau hauv yoj dabtsi yog khoov lub sij hawm.
Charpy V-Kev ntsuas qhov cuam tshuam: ntsuas lub zog nqus hauv Joules ntawm qhov ntsuas kub tsis zoo. Qhov kev ntsuam xyuas no tau lees paub tias cov khoom siv hluav taws xob - mus rau - qhov hloov pauv kub ntawm cov phaj hlau yog qhov muaj kev nyab xeeb hauv qab qhov chaw ua haujlwm ntawm lub hom phiaj lub nkoj.
Los ntawm -Thickness (Z-Kev taw qhia) Kev Ntsuas: Rau cov pob qij txha nruj heev, xws li kev sib tshuam ntawm lub tis tank lossis lub lawj hnyav, cov phaj hlau yuav raug mob los ntawm lamellar tearing. Cov ntawv pov thawj hauv chav kawm tuaj yeem suav nrog "Z- qib" cov npe (Z15, Z25, Z35), uas tau lees paub qhov kev ua haujlwm siab ntawm cov tuab tuab.
Chemical Composition thiab Weldability txwv: Marine steel yuav tsum tau yooj yim welded nyob rau hauv shipyard ib puag ncig yam tsis muaj preheating qhov twg ua tau. Cov zej zog hauv chav kawm nruj nruj txwv cov ntsiab lus carbon thiab cap lub Carbon Equivalent Value (CEV) lossis Cold Cracking Susceptibility parameter (Pcm). Cov pa roj carbon tsawg dua qhov tseem ceeb txo qis qhov kev pheej hmoo ntawm hydrogen- pab tawg hauv tshav kub- thaj chaw cuam tshuam (HAZ) ntawm cov welded seams.
Tsis yog-Kev Ntsuas Kev Puas Tsuaj (NDT): Kev kuaj ultrasonic (UT) yog ib txwm ua los kuaj xyuas cov laminations sab hauv, suav nrog, lossis sub-voids saum npoo uas tuaj yeem cuam tshuam cov qauv kev ncaj ncees hauv qab thauj khoom.
Sib sib zog nqus dhia mus rau hauv Cov Tsev Kawm Ntawv Loj: ABS, DNV, thiab LR
Thaum IACS tsim kom muaj kev sib koom ua ke, cov koom haum kev faib tawm ib leeg tswj hwm lawv tus kheej cov ntawv cai sib txawv, cov kev qhia tshwj xeeb, thiab cov txheej txheem tshwj xeeb uas tsim nyog rau lawv cov lag luam lag luam.
American Bureau of Shipping (ABS)
Founded hauv 1862, American Bureau of Shipping yog lub hauv paus hauv Teb Chaws Asmeskas thiab tuav txoj haujlwm tseem ceeb hauv lub zog sab nraud, kev xa khoom lag luam, thiab kev tsim nkoj nkoj thoob plaws Asmeskas thiab thoob ntiaj teb lub zog.
ABS cov cai rau cov ntaub ntawv hlau tau piav qhia hauv ABS Cov Cai rau Cov Khoom Siv thiab Vuam. Cov ntawv hlau uas tau lees paub los ntawm ABS muaj cov khoom sib txawv, xws li "ABS Qib EH36" lossis "ABS Qib A." ABS muab kev tsom ntsoov rau kev ncaj ncees rau kev tsim khoom tsim khoom thiab kev xa tawm (FPSO) cov chaw, kev xyaum ua haujlwm, thiab cov nkoj tawm sab nrauv cua turbine. ABS daim ntawv pov thawj cov txheej txheem hais txog kev ruaj ntseg zoo nyob ib puag ncig hnyav- cov phaj tuab siv nyob rau hauv cov khoom siv sab nrauv cantilever, ceg ceg rau jack- nce rigs, thiab siab - tensile structural zones hauv cov thawv loj loj.
Det Norske Veritas (DNV)
Tsim los ntawm kev sib koom ua ke ntawm DNV thiab Germanischer Lloyd (GL), DNV yog lub hauv paus hauv Norway thiab sawv cev rau lub ntiaj teb kev faib tawm loj tshaj plaws. Muab nws cov keeb kwm Nordic, DNV muaj lub ntiaj teb- muaj kev paub zoo tshaj plaws hauv kev hnyav-ib puag ncig cov qauv sab nrauv, Arctic navigation, LNG cov neeg nqa khoom, thiab cov cuab yeej siv dav hlau ntsuab.
DNV muab ntawv pov thawj marine steel daim hlau raws li nws cov txheej txheem DNV Class Rules rau Nkoj - Cov Khoom Siv thiab Vuam. Cov ntaub ntawv tsim los qhia txog DNV nomenclature, xws li "DNV NV E36" lossis "DNV NV F40." DNV cov ntaub ntawv pov thawj muab qhov hnyav tshwj xeeb rau kev ua haujlwm tawg, qaug zog tus cwj pwm nyob rau hauv hnyav North Hiav Txwv yoj spectra, Thermo siab heev-Mechanical Controlled Processing (TMCP) pov thawj, thiab ultra- qis- qhov kub thiab txias cuam tshuam kev ua haujlwm rau cov dej khov- chav kawm. DNV tseem yog tus thawj coj hauv kev lees paub siab - lub zog steels siv hauv lub hauv paus tsho thiab ntab platforms ntawm ntug dej hiav txwv cua ua liaj ua teb.
Lloyd's Register (LR)
Tsim nyob rau hauv London xyoo 1760, Lloyd's Register yog lub neej qub tshaj plaws hauv kev faib tawm hauv lub neej thiab tswj hwm txoj cai loj thoob ntiaj teb kev xa khoom, kev tiv thaiv tub rog, thiab kev lag luam thoob ntiaj teb kev lag luam.
Hlau daim hlau ntawv pov thawj raws li Lloyd's Register ua raws li LR Cov Cai rau Kev Tsim Khoom, Kev Ntsuas thiab Ntawv Pov Thawj ntawm Cov Khoom. LR cov npe tshwm sim nyob rau hauv cov ntawv tshaj tawm xov xwm zoo li "LR Qib AH36," "LR Qib D," thiab cov cim zoo sib xws. LR cov ntaub ntawv pov thawj cov ntaub ntawv tseem ceeb heev rau cov khoom siv traceability, nruj deg tsis xws luag txwv, advanced ultrasonic xeem qauv, thiab tag nrho cov khoom saw ruaj ntseg. LR stamps ntawm Shipbuilding Steel Phaj raug lees paub thoob ntiaj teb los ntawm thoob ntiaj teb cov ntawv pov hwm kev nyab xeeb thiab cov chij xeev raws li lub cim ntawm kev ntseeg tsis tau zoo.
Kev sib haum xeeb vs. Cim Cim
Txawm hais tias muaj qhov sib txawv me me hauv txoj cai layout thiab cov kev xav tau tshwj xeeb, ABS, DNV, thiab LR lees paub qhov sib npaug ntawm cov qhab nia IACS. Lub phaj tsim raws li Qib EH36 raws li IACS UR W11 cov hauv paus ntsiab lus yuav ua tiav cov txheej txheem kev siv tshuab thiab tshuaj lom neeg ntawm tag nrho peb lub zej zog. Txawm li cas los xij, ob lossis peb daim ntawv pov thawj - qhov twg lub zeb zeb tau txais kev pom zoo los ntawm ABS, DNV, thiab LR ib txhij rau ib lub phaj batch- yuav tsum tau ua kom txaus siab rau cov kev txwv nruj tshaj plaws ntawm tag nrho peb lub zej zog.
Lub tswv yim thiab kev lag luam tus nqi ntawm Certified Steel rau Shipyards thiab Steel Mills
Qhov yuav tsum tau muaj rau kev faib cov ntawv pov thawj hauv zej zog yog ntau tshaj li qhov cuam tshuam ntawm bureaucratic lossis lub thawv ua raws li yooj yim; nws yog ib qho tseem ceeb ntawm cov txheej txheem thiab kev lag luam stabilizer rau lub ntiaj teb shipping ecosystem.
Tiv thaiv kev puas tsuaj loj
Tus nqi tseem ceeb ntawm daim ntawv pov thawj Shipbuilding Steel Phaj yog nyob rau hauv kev pheej hmoo txo qis. Hull cov txheej txheem tsis ua haujlwm ntawm hiav txwv ua rau muaj kev puas tsuaj loj: lub nkoj sai sai snapping, thauj khoom tuav dej nyab, dej hiav txwv muaj kuab paug, thiab kev ploj tuag loj heev. Los ntawm kev xav tau thib peb-kev pov thawj ntawm cov khoom muaj zog, tshuaj lom neeg purity, thiab qis- qhov kub thiab txias, cov ntawv pov thawj kev faib tawm yuav tshem tawm cov txheej txheem ua tsis tiav ntxov vim qhov tsis zoo ntawm metallurgy.
Kev cai lij choj, kev tswj hwm, thiab nyiaj txiag tsim nyog
Lub nkoj ua lag luam niaj hnub tsis tuaj yeem ua haujlwm raug cai hauv dej thoob ntiaj teb yam tsis muaj npe hauv chav kawm. Chij lub xeev tswj hwm kev faib cov ntawv pov thawj los muab kev sau npe hauv tebchaws, thaum cov koom haum pov hwm kev noj qab haus huv hauv hiav txwv xav tau cov ntaub ntawv hauv chav kawm ua ntej sau npe hull thiab tshuab (H&M) cov cai lossis kev tiv thaiv thiab kev them nuj nqis (P&I).
Yog tias lub chaw nres nkoj siv cov hlau tsis muaj ntawv pov thawj thaum tsim lub nkoj:
Cov kws tshawb fawb hauv chav kawm yuav tsis lees paub cov seem uas tsis tau lees paub thaum tshawb xyuas kev tsim kho nkoj.
Lub nkoj yuav raug tsis lees paub Daim Ntawv Pov Thawj Chav Kawm, ua rau nws tsis tuaj yeem tawm ntawm qhov chaw nres nkoj lossis ua haujlwm ua lag luam.
Marine insurers yuav tsis kam them, ua rau muaj kev puas tsuaj nyiaj txiag puas tsuaj rau cov tswv nkoj thiab thaj chaw ib yam nkaus.
Supply Chain Efficiency thiab Material Traceability
Rau steel mills thiab shipyards, chav kawm ntawv pov thawj muab ib tug universal technical language. Standardized grading tso cai rau naval architects los tsim lub hull lug nrog meej engineering kev ruaj ntseg margins, paub hais tias cov ntawv pov thawj steel los ntawm ib tug pom zoo zeb yuav ua tau zoo tib yam tsis hais txog ntawm nws thaj chaw keeb kwm.
Tsis tas li ntawd, txhua daim ntawv pov thawj Shipbuilding Steel Phaj yog ib qho nyuaj mus tas li -stamped markings raws nws ntug, nrog rau cov chav kawm ntawv lub logo, tshav kub tooj, phaj tooj, thiab qib qeb. Txoj kev tswj xyuas nruj no ua kom tiav cov khoom siv taug qab thoob plaws hauv 20 txog 30- xyoo kev ua haujlwm ntawm lub nkoj, ua kom yooj yim kho cov qauv thiab hloov phaj thaum lub sij hawm niaj hnub tshawb xyuas qhov chaw qhuav.
Xaus
Cov qauv kev ncaj ncees ntawm txhua tus dej hiav txwv- mus rau lub thawv nkoj, nkoj nkoj, cov roj tanker, thiab cov cua turbine nyob sab ntug dej hiav txwv tso siab rau cov khoom siv tsis pom thiab cov khoom siv tawv tawv uas muaj nyob hauv nws lub nkoj. Shipbuilding Steel Phaj tsis yog cov khoom siv sib xws; Nws yog ib qho khoom siv zoo heev, metallurgical cov khoom tsim los tiv thaiv kev tsis sib haum xeeb tsis muaj zog thiab muaj kev sib ntaus sib tua marine ib puag ncig.
Kev faib cov koom haum xws li ABS, DNV, thiab LR muab tus choj tseem ceeb ntawm kev ntseeg siab ntawm cov tuam txhab hlau, cov neeg tsim nkoj, cov tswv nkoj, thiab cov koom haum tswj hwm thoob ntiaj teb. Los ntawm kev pom zoo zeb nruj, kev soj ntsuam nruj ntawm cov tshuaj thiab cov khoom siv kho tshuab, thiab kev tshuaj xyuas thib peb -, cov zej zog no xyuas kom meej tias txhua daim ntawv pov thawj ua tau raws li cov qauv tsis muaj zog thiab ductility. Raws li kev lag luam xa khoom thoob ntiaj teb txav mus rau kev tsim cov nkoj loj dua, kev thauj mus los hauv Arctic, xoom- emission propulsion systems, thiab cov qauv siv hluav taws xob rov ua dua tshiab hauv ntug dej hiav txwv loj, cov qauv tsis muaj txiaj ntsig tau tswj hwm los ntawm kev faib cov ntawv pov thawj hauv zej zog yuav yog lub hauv paus ntawm kev nyab xeeb ntawm lub ntiaj teb dej hiav txwv.
