API kab yeeb nkab cov khoom qib feem ntau suav nrog cov hauv qab no:
GR.B: Qhov no yog cov khoom siv hluav taws xob qis qis uas tuaj yeem ua tau raws li cov kev xav tau ntawm kev thauj mus los hauv cov cheeb tsam uas tsis tshua muaj siab.
X42, X46, X52, X56, X60 : Cov no yog cov khoom siv nruab nrab-lub zog kab yeeb nkab haum rau nruab nrab siab thiab kub kav.
X65, X70, X80: Cov no yog cov khoom siv qib high-strength kab yeeb nkab. Vim lawv cov yam ntxwv ntawm lub zog siab, cov ntaub ntawv no feem ntau siv rau hauv cov ntawv siv high-pressure xws li cov kav dej lossis cov chaw nyob sab nraud.
Cov hauv qab no yuav tsum tau txiav txim siab thaum xaiv cov qib yeeb nkab:
Kev ua haujlwm siab: Kev ua haujlwm siab yog lub hauv paus tseem ceeb rau kev xaiv cov khoom siv. Kev ua haujlwm siab dua yuav tsum muaj cov khoom siv kom muaj zog ntau dua los tiv thaiv lub zog sab hauv tsim thaum lub sijhawm thauj khoom. API cov kav dej sib txawv ntawm qhov sib txawv los xyuas kom meej tias cov khoom siv tau xaiv tuaj yeem ua kom haum rau cov dej thauj mus los raws li kev ua haujlwm tau teev tseg.
Kev xav txog qhov kub thiab txias ua haujlwm: Kev hloov pauv kub muaj qhov cuam tshuam loj rau cov khoom siv kho tshuab. Ob qhov siab thiab qis kub siab heev yuav hloov lub zog, ductility thiab corrosion kuj ntawm cov khoom. Yog li, API kab yeeb nkab qib uas tswj cov qauv kev ncaj ncees thiab kev ua haujlwm zoo tshaj qhov ntsuas kub ntawm cov kav dej yuav tsum tau ua.
Fluid muaj pes tsawg leeg cuam tshuam: Cov muaj pes tsawg leeg ntawm cov kua conveyed, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm corrosiveness, yog ib qho tseem ceeb rau xaiv cov khoom. Rau corrosive kua uas muaj hydrogen sulfide los yog lwm yam corrosive hais, yuav tsum tau siv cov ntaub ntawv corrosion-resistant ntau dua. API kab yeeb nkab qib tsim los rau kev pabcuam qaub lossis corrosive ib puag ncig muaj cov ntsiab lus alloying thiab kev kho saum npoo kom txo tau qhov kev pheej hmoo ntawm corrosion thiab txuas ntxiv lub neej kev pabcuam ntawm cov kav dej.
Kev ntsuam xyuas cov khoom vaj khoom tsev: Cov qib API sib txawv ntawm cov yeeb nkab muaj lawv tus kheej cov khoom siv tshwj xeeb, xws li cov khoom siv zog, tensile zog, elongation, toughness, thiab corrosion kuj. Cov khoom no yuav tsum raug soj ntsuam raws li cov kev xav tau ntawm kev ua haujlwm thiab kev pheej hmoo ntawm cov kav dej.
API 5L X52 loj txoj kab uas hla steel kav
