Cov lus qhia txheem

API 5L feem ntau yog hais txog tus qauv kev ua haujlwm rau cov yeeb nkab kab. Cov yeeb nkab kab suav nrog cov yeeb nkab hlau tsis muaj qhov thiab cov yeeb nkab hlau vuam. Tam sim no, cov yeeb nkab hlau vuam feem ntau siv rau cov yeeb nkab roj suav nrog cov yeeb nkab kauv submerged arc welded (SSAW), cov yeeb nkab ncaj nraim submerged arc welded (LSAW), thiab cov yeeb nkab hluav taws xob tsis kam welded (ERW). Cov yeeb nkab hlau tsis muaj qhov feem ntau raug xaiv thaum lub taub ntawm cov yeeb nkab tsawg dua 152 hli.

Tus qauv teb chaws GB/T 9711-2011 Cov kav hlau rau cov roj thiab roj av kev lag luam thauj mus los yog sau ua raws li API 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 muaj xws li GR.B,X42, X46, X52, X56, X60, X70, X80, thiab lwm yam. Cov qib hlau sib txawv ntawm cov kav hlau muaj cov kev cai 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.

Kev Sib Piv Txog Tus Qauv Zoo

1. Tus qauv zoo ntawm PSL2 siab dua li PSL1. Ob qib kev qhia tshwj xeeb no tsis yog tsuas yog muaj cov kev cai tshuaj xyuas sib txawv xwb, tab sis kuj muaj cov kev cai sib txawv rau cov tshuaj lom neeg thiab cov khoom siv kho tshuab. Yog li ntawd, thaum xaj raws li API 5L, cov lus cog tseg hauv daim ntawv cog lus yuav tsum tsis txhob tsuas yog qhia cov lus qhia tshwj xeeb, qib hlau, thiab lwm yam. Ntxiv nrog rau cov cim qhia ib txwm muaj, qib kev qhia tshwj xeeb ntawm cov khoom kuj yuav tsum tau qhia, uas yog, PSL1 lossis PSL2. PSL2 nruj dua li PSL1 hauv cov ntsiab lus ntawm cov tshuaj lom neeg, cov khoom tensile, lub zog cuam tshuam, kev sim tsis puas tsuaj thiab lwm yam cim qhia.

2. PSL1 tsis xav tau kev cuam tshuam. Rau txhua qib hlau ntawm PSL2 tshwj tsis yog X80 steel qib, qhov loj tag nrho 0 ℃ Akv nruab nrab: longitudinal ≥101J, transverse ≥68J.

3. Cov kav dej yuav tsum tau kuaj xyuas qhov siab ntawm hydraulic ib qho zuj zus, thiab tus qauv tsis tau teev tseg tias kev hloov pauv dej tsis ua rau puas tsuaj. Qhov no kuj yog qhov sib txawv loj ntawm cov qauv API thiab cov qauv Suav. PSL1 tsis tas yuav tsum tau kuaj xyuas tsis ua rau puas tsuaj, thaum PSL2 xav tau kev kuaj xyuas tsis ua rau puas tsuaj ib qho zuj zus.