Cov lus qhia txheem
API 5LFeem ntau yog hais txog tus qauv kev ua haujlwm rau cov kav hlau kav dej. Cov kav hlau kav dej suav nrog cov kav hlau tsis muaj qhov thiab cov kav hlau vuam. Tam sim no, cov hom kav hlau vuam uas siv ntau ntawm cov kav roj suav nrog cov kav hlau sib txuas ua ke (SSAW), cov kav hlau ncaj ncaj (LSAW), thiab cov kav hlau hluav taws xob tsis kam (ERW). Cov kav hlau tsis muaj qhov feem ntau raug xaiv thaum lub taub ntawm cov kav dej tsawg dua 152 hli.
Tus qauv teb chaws GB / T 9711-2011 Cov kav hlau rau cov roj thiab roj av kev lag luam kev thauj mus los hauv av yog sau ua raws liAPI 5L.
GB/T 9711-2011 qhia txog cov kev cai tsim khoom rau cov kav hlau tsis muaj qhov thiab cov kav hlau welded ntawm ob qib kev qhia tshwj xeeb ntawm cov khoom (PSL1 thiab PSL2) siv rau hauv cov kav dej thauj mus los hauv roj thiab roj. Yog li ntawd, tus qauv no tsuas yog siv rau cov kav hlau tsis muaj qhov thiab cov kav hlau welded rau kev thauj mus los roj thiab roj, thiab tsis siv rau cov kav hlau cam khwb cia.
Qib hlau
Cov khoom siv raw steel qib ntawmAPI 5LCov kav hlau suav nrog GR.B, X42, X46, X52, X56, X60, X70, X120 cov kav hlau. Cov qib hlau sib txawv ntawm cov kav hlau muaj cov kev xav tau sib txawv rau cov khoom siv raw thiab kev tsim khoom, tab sis cov pa roj carbon sib npaug ntawm cov qib hlau sib txawv raug tswj hwm nruj me ntsis.
Tus Qauv Zoo
Hauv cov qauv API 5L steel yeeb nkab, cov qauv zoo (lossis cov kev cai) ntawm cov yeeb nkab hlau tau muab faib ua PSL1 thiab PSL2. PSL yog lub npe luv ntawm cov khoom qhia qib.
PSL1 muab cov kev cai dav dav txog qib zoo ntawm cov kav dej hlau; PSL2 ntxiv cov kev cai yuav tsum muaj rau cov tshuaj lom neeg sib xyaw, qhov tawv tawv, cov khoom muaj zog thiab NDE ntxiv.
Cov yeeb nkab hlau qib ntawm PSL1 yeeb nkab hlau (lub npe qhia txog qib zog ntawm cov yeeb nkab hlau, xws li L290, 290 hais txog qhov tsawg kawg nkaus ntawm lub zog ntawm lub yeeb nkab lub cev yog 290MPa) thiab qib hlau (lossis qib, xws li X42, qhov twg 42 sawv cev rau qhov tsawg kawg nkaus ntawm lub zog lossis lub voj voog sab saud. Qhov tsawg kawg nkaus ntawm lub zog ntawm cov yeeb nkab hlau (hauv psi) yog tib yam li cov yeeb nkab hlau. Nws yog tsim los ntawm cov tsiaj ntawv lossis cov lej sib xyaw ntawm cov tsiaj ntawv thiab cov lej uas txheeb xyuas qib zog ntawm cov yeeb nkab hlau, thiab qib hlau muaj feem cuam tshuam nrog cov tshuaj lom neeg ntawm cov hlau.
Cov kav hlau PSL2 yog tsim los ntawm cov ntawv lossis kev sib xyaw ua ke ntawm cov ntawv thiab cov lej siv los txheeb xyuas qib zog ntawm cov kav hlau. Lub npe hlau (qib hlau) muaj feem cuam tshuam nrog cov tshuaj lom neeg ntawm cov hlau. Nws kuj suav nrog ib tsab ntawv (R, N, Q lossis M) ua ib qho tom qab, uas qhia txog qhov xwm txheej xa khoom. Rau PSL2, tom qab qhov xwm txheej xa khoom, kuj tseem muaj tsab ntawv S (acid service environment) lossis O (marine service environment) qhia txog qhov xwm txheej kev pabcuam.