Dab tsi yog qhov sib txawv ntawm API 5L X80 thiab API 5L X70?
API 5L X80 thiab X70 yog ob qho tib neeg hlau cov qauv tsim los ntawm American cov roj av roj teeb (API) thiab yog feem ntau siv rau cov roj thiab roj kev sib kis. Cov hauv qab no yog cov tseem ceeb sib txawv ntawm ob:
1. Lub zog thiab kev ua haujlwm sib piv
Paib lub zog:
X70: Yam tsawg kawg vim muaj zog ntawm 70kpsi (kwv yees li 485mpa), haum rau nruab nrab ntawm kev kub siab kis tau cov xwm txheej.
X80: Yam tsawg kawg los lub zog muaj zog ntawm 80kksi (kwv yees li 552mpa), uas muaj zog dua thiab tuaj yeem tiv taus ntau qhov kev mob siab (piv txwv li cov pej xeem sib zog) Ib puag ncig).
Lub zog tensile:
X70: tensile lub zog ranges los ntawm 570-760 mpa.
X80: Lub zog tensile feem ntau yog siab dua, tab sis qhov no tau ua tiav nrog kev sib txuas nrog cov txheej txheem tshwj xeeb (piv txwv li cov txheej txheem kev sib txuam).
2. Qhov sib txawv ntawm cov tshuaj lom neeg
Cov ntsiab lus carbon:
X7 {{0: carbon (c) Cov ntsiab lus tsawg dua lossis sib npaug. 12}}. 015%, phosphorus (p) tsawg dua lossis sib npaug rau 0.025%.
X8 {0: Cov ntsiab lus me me (Sulfur, Phosphorus impuries ntau dua lossis sib npaug lossis 0.2%) los txhim kho kev nruj thiab corrosion tsis kam.
Alloying ntsiab:
X7 {{{5 5}}: Manganese (MN) Tsawg dua lossis sib npaug nrog 1.70%, Vanadium (TI) tag nrho cov tsawg dua lossis sib npaug rau 0.15%.
X80: Ua kom zoo rau lub koom haum los ntawm kev ntxiv cov khoom siv micro-alloy (piv txwv li lub zog) kom haum rau lub zog kom siab thiab nkag.
3. Daim ntawv thov cov xwm txheej thiab cov txheej txheem yuav tsum tau ua
Chaw Thov:
X70: Feem ntau yog siv rau cov roj thiab cov roj sib kis tau cov raj dej hauv av thiab cov pa taws, xws li thauj hauv nroog, tshuaj siv hluav taws xob hauv nroog.
X80: Nws yog qhov haum rau ultra-high-high-walled pipelines (xws li hydrogen sulfide (hucts) corrosion-resistant acidic ib puag ncig.
Cov Txheej Txheem Ntau Lawm:
X70: PEMional tswj dov thiab cua txias (TMCP) cov txheej txheem nrog cov thev naus laus zis siab.
X80: Yuav tsum tau los sib txuas ntau-tshuab dov (TMCP) thiab nrawm dua txias (ACC) thiab lub zog nyuaj thiab kev ua kom siab.
4. Kev tso nyiaj thiab xaiv cov lus pom zoo
Tus nqi: Tus nqi ntawm X80 yog siab dua qhov X70 vim yog qhov nyuaj ntawm cov khoom siv thiab cov txheej txheem.
Xaiv cov ntsiab cai:
XAV X70: Haum rau ib txwm muaj siab (tsawg dua lossis sib npaug nrog 12MPA) thiab tsis-ib puag ncig.
Xaiv X80: Kom tau raws li qhov tshwj xeeb ntawm cov kev kub siab (ntau dua los yog sib npaug rau 15mpa), tsawg} degree) lossis corrosion tsis kam.
Lus Cim: Thaum kev yuav khoom, nws yog ib qho tsim nyog los qhia qhov version ntawm Api 5L Txuj Ci (piv txwv li, Charpy V-Ntiv Xeem V-Ntes) hauv Kev Ntsuas Thib Peb.
