Cov. Cov Khoom Siv Neeg Kho Tshuab
Yield lub zog: ntau dua lossis sib npaug rau 448 MPa (X65m Ntawv Nkauj PSL2) 1 lossis siab dua lossis sib npaug ntawm 450 MPA (L450q);
Lub zog tensile: ntau dua los yog sib npaug rau 535 ~ 760 MPA (X65Q seamless steel yeeb nkab);
Kev Cuam Tshuam: Loj dua lossis sib npaug nrog 48 J ntawm -27 degree (x65m psl2).
Cov ntsuas saum toj no qhia tau tias API 5L X65 muaj lub zog siab thiab tawv, tab sis tsis yog cuam tshuam ncaj qha ntawm Brinell Hardness (HBW) lossis Rockwell Hardness (HBW Hardness (HBW).
2. Cov qauv uas yuav tsum tau ua rau hardness
API 5L tus qauv tsis qhia meej meej txog cov yeeb yam zoo ntawm X65 qib steel yeeb nkab, paib muaj zog thiab corrosion tsis kam thiab lwm yam tsis sib xws;
Lub hardness ntawm cov ntaub ntawv zoo sib xws (piv txwv li Why65) feem ntau yog kom cov txheej txheem sib sau thiab ua kom tau cov khoom siv ntau lawm (piv txwv li cov kev xav tau ntawm kev xav tau ntawm hydrogen-inducts cracking (hic).
3. Qhov txwv ntawm kev tawv tawv hauv kev thov cov xwm txheej
Nyob rau hauv cov roj thiab roj kev sib kis pipelines, lub hardness ntawm API 5L X65 cov yeeb nkab yuav tsum tau raws li cov xwm txheej hauv qab no:
Zam txhob tawg thaum lub sij hawm vuam lossis txias cov txheej txheem txias vim yog ntau dhau ntawm kev tawv tawv;
Hauv cov acidic ib puag ncig muaj cov kab mob hydrogen (h₂s), kev pheej hmoo ntawm sulphide kev nyuaj siab corrosion yuav tsum tau txo los ntawm lub hardness qis (feem ntau yog hrc tsawg dua los yog sib npaug rau 22).
Mus rau constumize
Lub hardness ntawm API 5L X65 tsis meej meej nyob rau hauv tus qauv, tab sis nws cov cuab yeej siv tshuab ntau dua lossis sib npaug ntawm cov kev xav tau ntawm cov kev xav tau ntawm qhov kub thiab txias thiab muaj kev kub ntxhov. Hauv kev xyaum, nws raug nquahu kom kuaj ntxiv lossis xa mus rau cov fittingness (piv txwv li wphy65 (piv txwv li acidic ib puag ncig (piv txwv li acidic ib puag ncig).
