1. Q: "PSL 2" txhais li cas hauv API 5L yeeb nkab specifications?
A:PSL stands rau Product Specification Level. PSL 1 yog qhov yuav tsum tau ua. PSL 2 tsim cov kev xav tau nruj dua, suav nrog kev sim tshuaj hnyav dua (Charpy), siab tshaj tawm los thiab lub zog tensile, kev tswj cov tshuaj lom neeg nruj dua (xws li, qis carbon sib npaug rau qhov zoo dua weldability), thiab ntxiv tsis yog -kev kuaj kev puas tsuaj (NDT).
2. Q: Lub hom phiaj ntawm Hydrostatic Test yog dab tsi?
A:Nws yog ib qho kev sim uas tsis yog -kev puas tsuaj qhov twg cov yeeb nkab tau ntim nrog dej thiab siab mus rau ib theem uas tau teev tseg (ib feem pua ntawm nws qhov tsawg kawg nkaus yield zog) los xyuas nws cov qauv kev ncaj ncees thiab xau- nruj hauv qab.
3. Q: Dab tsi yog ntsuas los ntawm Hardness Test (xws li Brinell, Rockwell) ntawm cov yeeb nkab?
A:Kev ntsuas hardness muab kev ntsuas ceev, tsis ncaj qha ntawm cov yeeb nkab lub zog thiab hnav tsis kam. Nws cuam tshuam rau lub zog tensile thiab ua kom cov khoom raug cua sov- kho kom raug. Piv txwv li, Qib 4140 nyob rau hauv ib tug quenched thiab tempered mob yuav muaj ib tug siab Rockwell C hardness.
4. Q: NDE Ultrasonic Test (UT) yog dab tsi?
A:Ultrasonic Testing siv siab -ntau zaus lub suab tsis zoo los xyuas qhov tsis zoo ntawm sab hauv thiab subsurface xws li laminations, inclusions, los yog voids nyob rau hauv cov yeeb nkab phab ntsa. Nws yog ib qho tseem ceeb ntawm kev tswj xyuas cov kav dej siv hauv kev pabcuam tseem ceeb.
Qeb 4: Daim ntawv thov -Cov teeb meem tshwj xeeb
5. Q: Vim li cas cov ntsiab lus Sulfur yog qhov tseem ceeb hauv cov kav dej rau OCTG (Oil Lub Tebchaws Tubular Khoom)?
A:Cov ntsiab lus siab Sulfur (S) tuaj yeem ua rau Hydrogen-Induced Cracking (HIC) lossis Sulfide Stress Cracking (SSC) hauv qaub (H₂S-} muaj) ib puag ncig uas muaj roj thiab roj ntau lawm. Cov qauv zoo li API 5CT rau kev pabcuam qaub muaj qhov txwv tsis pub muaj sulfur tsawg heev.
