ASTM A 334 3Qib 6yog lub siab-lub zog, qis-kub carbon steel yeeb nkab nrog lub siab tshaj plaws carbon ntsiab lus ntawm 0.30%, manganese cov ntsiab lus ntawm 0.29-1.06%, lub zog tensile yam tsawg kawg nkaus ntawm 415Mpa (60ksi), thiab yield zog ntawm 240Mp (35ksi).
Nws yog tsuas yog siv nyob rau hauv lub tshav pob ntawm liquefied natural gas chaw, polar engineering, thiab tub yees tshuab, adapting rau tsis tshua muaj kub ib puag ncig.
ASTM A 334 3yog tus qauv specification rau seamless thiab welded carbon thiab alloy steel tubing rau cryogenic daim ntaub ntawv.
Muaj ntau qib kom tau raws li qhov xav tau sib txawv.
Qib 1, Qib 3, Qib 6, Qib 7, Qib 8, Qib 9, thiab Qib 11.
Qib 1thiab Qib 6 yog ob qho tib si carbon steel kav.
ASTM A334 Qib 6 steel yeeb nkab tuaj yeem tsim los ntawm seamless lossis welded txheej txheem.
Cov txheej txheem vuam muaj ntau txoj hauv kev xws liHluav taws xob tsis kam vuam (ERW)thiabSubmerged arc vuam (SAW).
Hauv qab no, yog cov txheej txheem ntau lawm rauLongitudinal Submerged Arc Vuam (LSAW).
Raws li cov chaw tsim khoom ntawm welded steel tubes, peb muaj peev xwm ua tau raws li cov kev xav tau tshwj xeeb ntawm peb cov neeg siv khoom sib txawv, muab ntau yam kev xaiv ntawm cov khoom siv los xyuas kom meej qhov ua tau zoo tshaj plaws thiab zoo rau txhua daim ntawv thov.
Ib-thooj weld ntawm LSAW tubing ho txhim kho tag nrho lub zog ntawm lub raj, tso cai rau nws tiv taus siab dua.
Tsis tas li ntawd, nws yog qhov tsim nyog rau kev tsim cov yeeb nkab loj thiab tuab-walled steel yeeb nkab uas ua tau raws li qhov xav tau ntawm ASTM A334 Qib 6 hauv kev lag luam loj thiab lub zog xa khoom, xws li hauv kev tsim kho cov roj liquefied loj ( LNG).
Nyob rau tib lub sijhawm, kev tswj xyuas qhov tseeb kom ntseeg tau cov yeeb nkab diameters thiab cov phab ntsa tuab kom txhim kho kev ntseeg tau thiab tiv thaiv cov dej xau hauv cov kav dej.
Ua kom zoo los ntawm cua sov kom tsis txhob tsawg dua 1550 ° F [845 ° C] thiab txias hauv huab cua los yog hauv chav txias ntawm lub qhov cub cua sov.
Yog xav tau tempering, nws yuav tsum tau sib tham.
Cov tshuaj muaj pes tsawg leeg ntawm ASTM A334 Qib 6 steel yeeb nkab yog tsim los xyuas kom meej cov khoom zoo ntawm qhov kub thiab txias txaus rau cov kev pabcuam txhim khu kev qha nyob rau hauv huab cua txias.
| Qib | C (Carbon) | Mn (Manganese) | P (Phosphorus) | S (Sulfur) | Si (Silicon) |
| Qib 6 | max 0.30 Nws | 0.29-1.06 Nws | max 0.025 | max 0.025 | qis 0.10 |
| Rau txhua qhov txo qis ntawm 0.01% carbon qis dua 0.30%, qhov nce ntawm 0.05% manganese saum 1.06% yuav tso cai rau qhov siab tshaj ntawm 1.35% manganese. | |||||
Rau Qib 1 lossis Qib 6 steels, nws tsis raug tso cai los muab cov qib alloying rau txhua yam uas tsis yog cov uas xav tau.Txawm li cas los xij, nws raug tso cai ntxiv cov khoom tsim nyog rau deoxidation ntawm cov hlau.
Kev sim cuam tshuam ntawm Qib 6 steel yeeb nkab yog ua los ntawm -45 ° C [-50 ° F] raws li kev txheeb xyuas qhov toughness thiab kev cuam tshuam ntawm cov khoom nyob rau hauv ib puag ncig uas tsis tshua muaj kub.
Kev ntsuam xyuas tau ua los ntawm kev xaiv qhov tsim nyog cuam tshuam lub zog raws li phab ntsa thickness ntawm cov yeeb nkab steel.
Muab xam qhov tsawg kawg nkaus elongation qhov tseem ceeb rau txhua 1/32 hauv.[0.80 mm] txo cov phab ntsa thickness.
| Qib | Rockwell | Brinell |
| ASTM A334 Qib 6 | B 90 | 190 |
Txhua cov yeeb nkab yuav tsum raug kuaj tsis muaj hluav taws xob lossis hydrostatically raws li Specification A1016/A1016M.
Tshwj tsis yog txwv tsis pub teev nyob rau hauv daim ntawv yuav khoom, hom kev sim siv yuav tsum nyob ntawm qhov chaw tsim khoom xaiv.
Flattening Test
Flare Test (Seamless Tubes)
Flange Test (Welded Tubes)
Rov qab Flattening Test
1. Liquefied Natural Gas (LNG) cov chaw: Vim nws cov khoom kub tsis zoo, Qib 6 steel yeeb nkab yog dav siv hauv LNG ntau lawm, cia thiab thauj cov chaw.Cov chaw no xav tau cov ntaub ntawv uas muaj lub zog siab thiab zoo toughness ntawm qhov kub thiab txias.
2. Roj thiab roj tsheb thauj mus los: siv los thauj cov kua lossis cov pa roj carbon monoxide, xws li roj av liquefied roj av (LPG) thiab lwm cov kua dej kub hauv ib puag ncig qis.
3. Cov tshuab tub yees thiab cov chaw cia txias: Qhov no kuj tseem siv tau rau lwm qhov chaw ntawm lub tshuab tub yees, xws li kev ua kom khov thiab txias txias hauv kev ua zaub mov thiab lwm yam txheej txheem tshuaj uas yuav tsum tau ua haujlwm kub.
4. Polar engineering: Nyob rau hauv engineering tej yaam num nyob rau hauv lub polar cheeb tsam, xws li scientific chaw nres tsheb nyob rau hauv lub Arctic los yog Antarctica, lawv yog siv los tsim ruaj khov thiab txhim khu kev qha conveyor systems thiab cov qauv uas yuav tsum muaj peev xwm tiv taus huab cua txias thiab hnyav ib puag ncig.
5. Cov tshuab cua txias thiab cov cua kub sib txawv: Kuj tseem siv tau rau hauv cov tshuab cua txias loj thiab cov khoom siv hluav taws xob sib txawv, uas yuav tsum tau ua haujlwm zoo ntawm qhov kub thiab txias kom ntseeg tau tias qhov system efficiency thiab kev nyab xeeb.
6. Fais fab engineering thiab chaw nres tsheb fais fab: Hauv tshwj xeeb fais fab engineering tej yaam num, xws li tej yam ntawm lub hwj chim chaw nres tsheb, Qib 6 steel hlab yuav siv tau los tuav cov kua los yog gases ntawm qhov kub thiab txias los xyuas kom meej kev ruaj ntseg thiab zoo ntawm lub system.
TS EN 10216-4: P265NL: Feem ntau yog siv rau cov hlab ntsha siab thiab cov kav dej cryogenic, nws muaj qhov zoo toughness thiab lub zog thiab tsim nyog siv nyob rau hauv qhov chaw cryogenic.
DIN 17173: TSW 41N: Tsim los rau cov kev siv kub-kub, nws muab kev ua tau zoo ntawm qhov kub thiab txias thiab feem ntau yog siv rau hauv cov khoom siv thiab cov kav dej uas yuav tsum tau ua haujlwm tsis tshua muaj kub.
JIS G3460: STPL46: Siv rau kev thauj mus los hauv cov kav dej hauv qhov chaw uas muaj qhov kub thiab txias, muaj peev xwm tiv taus qee qhov kev cuam tshuam ntawm qhov kub thiab txias.
GB/T 18984:09Mn2V: Cov khoom no yog tshwj xeeb hauv kev tsim cov seamless steel raj rau siv nyob rau hauv ib puag ncig uas tsis muaj kub, nrog rau qhov kub thiab txias toughness thiab tawg tsis kam.
Thaum xaiv cov khoom sib npaug no, nws yog ib qho tseem ceeb kom ntseeg tau tias lawv cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv tshuab ua tau raws li qhov yuav tsum tau ua ntawm daim ntawv thov thiab kev ua haujlwm.
Cov kev txwv no yuav tsum tau muab piv rau hauv kev nthuav dav thiab cov txheej txheem kuaj thiab ntawv pov thawj ntxiv yuav tsum tau kuaj xyuas qhov tsim nyog thiab kev ua haujlwm ntawm cov khoom siv.
Txij li thaum nws tsim nyob rau hauv 2014, Botop Steel tau dhau los ua tus xa khoom ntawmcarbon steel yeeb nkabnyob rau sab qaum teb Tuam Tshoj, paub txog kev pabcuam zoo, cov khoom zoo, thiab kev daws teeb meem.Lub tuam txhab muaj ntau yam carbon steel kav thiab lwm yam khoom, xws li seamless, ERW, LSAW, thiab SSAW steel yeeb nkab, raws li zoo raws li ib tug tag nrho lineup ntawm cov yeeb nkab fittings thiab flanges.
Nws cov khoom tshwj xeeb kuj suav nrog cov qib high-qib alloys thiab austenitic stainless hlau, tsim kom tau raws li qhov xav tau ntawm ntau yam kev siv kav dej.
