API 5L Gr.B steel yeeb nkab siv tus qauv

API 5L yog ib txoj kab yeeb nkab qauv tsim los ntawm American Petroleum Institute rau roj thiab roj kav. GR.B yog ib qho ntawm cov qib steel thiab yog ib qib ntawm cov yeeb nkab rau cov roj thiab cov kav dej thauj mus los. Nws tseem hu ua L245 yeeb nkab, xa mus rau ISO 3183, muaj npe tom qab lub zog qis kawg nkaus ntawm 245 Mpa (35,500 Psi). API 5L tus qauv siv rau cov kav dej ntawm cov kab sib txawv thiab cov phab ntsa tuab, suav nrog cov kav hlau tsis sib haum thiab cov kav hlau welded.
API 5L GR.B yeeb nkab yog tsim los ntawm L245, uas muaj lub zog compressive siab, tsis tshua muaj kub toughness thiab zoo heev vuam kev ua tau zoo. Lub DWTT cuam tshuam lub zog nqus ntawm qhov ntsuas kub qis tshaj plaws (-5 degree) yuav tsum siab dua lossis sib npaug rau 85% SA, thiab Charpy cuam tshuam lub zog nqus yuav tsum siab dua lossis sib npaug rau 145J.
API 5L GR.B yeeb nkab yog tsuas yog siv rau kev thauj mus los ntawm cov roj thiab cov pa roj. Nws muaj ntau yam kev siv, tshwj xeeb tshaj yog nyob rau hauv cov kav dej loj loj, nrog rau cov txiaj ntsig zoo thiab kev siv nyiaj ntau.
Kev tsim cov kav dej API 5L GR.B yuav tsum ua raws li cov txheej txheem nruj, suav nrog kev tsim cov pa roj carbon tsawg lossis ultra-low-carbon microalloyed steel los xyuas kom meej qhov huv thiab sib xws ntawm cov hlau. Cov kev cai tshwj xeeb suav nrog cov ntsiab lus carbon tsawg dua lossis sib npaug rau 0.09%, cov ntsiab lus sulfur Tsawg dua lossis sib npaug rau 0.005%, phosphorus cov ntsiab lus tsawg dua lossis sib npaug rau 0.01%, cov ntsiab lus oxygen Tsawg dua lossis sib npaug li 0.002%, thiab lwm yam.

API B raj Chemical Structure

Cov khoom sib npaug ntawm sch 80 B raj

API 5L B Seamless Kab Tube