1. Q: Dab tsi yog qhov siab tshaj plaws hardness txwv (hauv Brinell) rau thaj tsam weld ntawm API 5L X65 PSL2 yeeb nkab npaj rau kev pabcuam qaub?
A:Rau kev pabcuam qaub, qhov siab tshaj plaws hardness ntawm248 HB (22 HRC)yog feem ntau teev rau cov hlau vuam, HAZ, thiab lub hauv paus hlau kom txo tau SSC kev pheej hmoo. Qhov no feem ntau yog ib qhov project- tshwj xeeb yuav tsum tau tshaj li API 5L tus qauv.
2. Q: Cov txheej txheem ASTM twg yog siv cov welded yeeb nkab rau cov laj kab, thiab dab tsi yog cov cuab yeej tseem ceeb?
A: ASTM A849 Cov Lus Qhia Tshwj Xeeb, specification rau ncej thiab rail, welded, steel laj kab qauv. Cov cuab yeej tseem ceeb yog lub zog tensile, nrog qib zoo li 50 [345] (50 ksi min tensile) thiab 65 [450] (65 ksi min tensile).
3. Q: Rau kev kho qhov chaw deg ntawm API 5L X52 ERW yeeb nkab los ntawm kev sib tsoo, dab tsi yog qhov siab tshaj plaws uas tau tso cai ua ntej vuam yuav tsum tau kho?
A:Raws li cov qauv zoo li API 1107, kev sib tsoo feem ntau siv tau yog tias nws tsis txo cov phab ntsa tuab hauv qab qhov tsawg kawg nkaus (feem ntau 87.5% ntawm nominal). Rau qhov tsis xws luag, sib tsoo qhov tob feem ntau yog txwv rau0.8 hli (1/32 nti)los yog tsawg dua; ntxaum tsis xws luag yuav tsum tau tsim nyog weld txheej txheem kho.
4. Q: Lub hom phiaj tseem ceeb ntawm "kev sim hydrostatic" yog dab tsi los ntawm cov qauv zoo li ASTM A53 thiab API 5L?
A:Qhov ntsuas hydrostatic kuaj xyuas qhov tseebsiab- muaj kev ncaj nceesntawm cov yeeb nkab lub cev thiab nws cov weld seam. Nws yog ib qho kev ntsuam xyuas pov thawj uas ua rau cov yeeb nkab mus rau theem kev ntxhov siab tshaj nws qhov ntsuas kev ua haujlwm siab yam tsis muaj kev ua haujlwm.
5. Q: Vim li cas HFIW (High Frequency Induction Vuam) feem ntau nyiam tshaj ERW rau siab dua -qib kab kav (xws li API 5L X70 thiab siab dua)?
A:HFIW muab qhov nqaim dua, tswj tau cov cua sov ntau dua- thaj chaw cuam tshuam (HAZ) thiab tsim cov vuam vuam nrog tsawg dua oxide. Qhov no ua rau muaj kev sib txhuam zoo dua qub, zoo dua toughness, thiab tsawg dua qhov tsis xws luag, uas yog qhov tseem ceeb rau siab - zog, siab - kav kav dej.
