Standard specifications

API 5L feem ntau yog hais txog kev ua tiav rau kab yeeb nkab. Kab yeeb nkab muaj seamless steel kav thiab welded steel kav. Tam sim no, feem ntau siv welded steel yeeb nkab hom ntawm cov roj pipelines muaj xws li kauv submerged arc welded yeeb nkab (SSAW), ncaj seam submerged arc welded yeeb nkab (LSAW), thiab hluav taws xob tsis kam welded yeeb nkab (ERW). Seamless steel kav feem ntau xaiv thaum cov yeeb nkab txoj kab uas hla yog tsawg dua 152mm.

Lub teb chaws tus qauv GB / T 9711-2011 Steel kav rau roj thiab roj kev lag luam pipeline tsheb thauj mus los yog muab tso ua ke raws li API 5L.

GB/T 9711-2011 qhia txog kev tsim cov kav dej seamless steel kav thiab welded steel kav ntawm ob theem khoom specification (PSL1 thiab PSL2) siv nyob rau hauv cov roj thiab roj pipeline tsheb thauj mus los. Yog li no, tus qauv no tsuas yog siv rau cov kav dej seamless steel thiab welded steel kav rau kev thauj mus los roj thiab roj, thiab tsis siv rau cov kav hlau cam.

Qib hlau

Cov ntaub ntawv raw steel qib ntawmAPI 5Lcov kav hlau muaj xws li GR.B,X42, X46, X52, X56, X60, X70, X80, thiab lwm yam. Cov qib steel sib txawv ntawm cov kav hlau steel muaj qhov sib txawv ntawm cov khoom siv raw thiab ntau lawm, tab sis cov pa roj carbon sib npaug ntawm cov qib steel sib txawv yog tswj nruj heev.

Txuj kev zoo

Hauv API 5L steel yeeb nkab tus qauv, cov qauv zoo (lossis cov kev xav tau) ntawm cov kav hlau tau muab faib ua PSL1 thiab PSL2. PSL yog lub npe luv ntawm cov khoom specification qib.

PSL1 muab cov kav dej dav dav hlau yeeb nkab zoo raws li qhov yuav tsum tau ua; PSL2 ntxiv qhov yuav tsum tau ua rau cov tshuaj muaj pes tsawg leeg, tsis muaj zog, lub zog muaj zog thiab ntxiv NDE.

Qib steel yeeb nkab ntawm PSL1 steel yeeb nkab (lub npe qhia lub zog ntawm cov yeeb nkab steel, xws li L290, 290 hais txog qhov tsawg kawg nkaus lub zog ntawm cov yeeb nkab lub cev yog 290MPa) thiab qib steel (los yog qib, xws li X42, qhov twg. 42 sawv cev rau qhov tsawg kawg nkaus yield zog los yog lub voj voog nce siab Qhov tsawg kawg nkaus yield zog ntawm cov yeeb nkab steel (hauv psi) yog tib yam li cov yeeb nkab steel Nws yog tsim los ntawm cov tsiaj ntawv los yog cov ntawv sib xyaw thiab cov lej uas qhia txog qib zog ntawm cov yeeb nkab steel, thiab qib steel muaj feem xyuam rau cov tshuaj muaj pes tsawg leeg ntawm cov hlau.

PSL2 steel kav yog tsim los ntawm cov ntawv los yog ib qho kev sib txuas ntawm cov tsiaj ntawv thiab cov lej siv los txheeb xyuas cov qib zog ntawm cov yeeb nkab steel. Lub npe steel (qib steel) muaj feem xyuam rau cov tshuaj muaj pes tsawg leeg ntawm cov hlau. Nws kuj suav nrog ib tsab ntawv (R, N, Q lossis M) ua cov lus sau, uas qhia txog kev xa khoom. Rau PSL2, tom qab kev xa khoom, tseem muaj tsab ntawv S (ib puag ncig kev pabcuam acid) lossis O (ib puag ncig kev pabcuam hauv hiav txwv) qhia txog kev pabcuam.

Kev sib piv tus qauv zoo

1. Tus qauv zoo ntawm PSL2 yog siab dua li ntawm PSL1. Ob qhov kev qhia tshwj xeeb no tsis yog tsuas yog muaj cov kev soj ntsuam sib txawv, tab sis kuj muaj cov kev cai sib txawv rau cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab. Yog li ntawd, thaum txiav txim raws li API 5L, cov nqe lus nyob rau hauv daim ntawv cog lus yuav tsum tsis tsuas qhia specifications, steel qib, thiab lwm yam. Ntxiv nrog rau cov kev taw qhia ib txwm, cov khoom specification theem kuj yuav tsum tau qhia, uas yog, PSL1 los yog PSL2. PSL2 yog nruj dua PSL1 nyob rau hauv cov nqe lus ntawm cov tshuaj muaj pes tsawg leeg, tensile zog, cuam tshuam lub zog, tsis-destructive xeem thiab lwm yam ntsuas.

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

3. Cov kav dej yuav tsum tau kuaj xyuas hydraulic siab ib qho los ntawm ib qho, thiab tus qauv tsis qhia tias tsis muaj kev puas tsuaj rau kev hloov pauv ntawm cov dej siab tau tso cai. Qhov no kuj yog qhov sib txawv loj ntawm API cov qauv thiab cov qauv Suav. PSL1 tsis tas yuav muaj kev tshuaj xyuas tsis muaj kev puas tsuaj, thaum PSL2 yuav tsum tau kuaj xyuas tsis muaj kev puas tsuaj ib los ntawm ib qho.