Dab tsi yog qhov txawv ntawm API 5L PSL1 thiab PSL2 rau Welded Steel Pipes?

Hauv kev lag luam roj thiab roj thoob ntiaj teb, API Specification 5L yog tus qauv tsim nyog rau cov kab yeeb nkab, tswj kev tsim khoom, kev sim, thiab xa cov kav dej siv hauv cov kav xa hluav taws xob tseem ceeb. Nyob rau hauv qhov kev qhia tshwj xeeb no, ob lub ntsiab yam khoom Specification Levels (PSL) tau txhais: PSL1 thiab PSL2. Thaum ob qho tib si ua kom lub hauv paus ntawm kev ua tau zoo, PSL2 sawv cev rau cov kev xav tau ntau dua thiab nruj dua, tshwj xeeb yog qhov tseem ceeb rau cov kav hlau welded. Tab sis dab tsi yog qhov sib txawv tseem ceeb ntawm API 5L PSL1 thiab PSL2 rau welded steel kav, thiab vim li cas cov kev sib txawv no tseem ceeb rau kev ncaj ncees thiab kev nyab xeeb? Hebei Huayang Steel Pipe Co., Ltd., ib lub chaw tsim khoom cog lus los tsim API 5L ntawv pov thawj LSAW thiab HFW kav, muab cov lus qhia dav dav ntawm cov kev sib txawv tseem ceeb no.

Nkag siab API 5L Product Specification Levels (PSL)

API 5L categorizes kab yeeb nkab rau hauv ob theem ntawm cov khoom specification: PSL1 thiab PSL2. Cov qib no txhais cov txheej txheem sib txawv ntawm cov kev xav tau, nrog PSL2 ua kom muaj kev xav tau nruj dua ntawm cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, kev sim, thiab kev taug qab. Qhov kev xaiv ntawm PSL1 thiab PSL2 yog nyob ntawm qhov tseem ceeb ntawm daim ntawv thov, kev khiav hauj lwm tej yam kev mob (xws li, siab, kub, qaub kev pab cuam), thiab tag nrho cov kev pheej hmoo soj ntsuam ntawm lub pipeline project.

Rau cov kav hlau welded, xws li LSAW (Longitudinally Submerged Arc Welded) thiab HFW (High-Frequency Welded) kav, qhov sib txawv ntawm PSL1 thiab PSL2 yog qhov tseem ceeb tshwj xeeb vim lawv cuam tshuam ncaj qha rau kev ncaj ncees ntawm cov vuam seam thiab tag nrho kev ntseeg siab ntawm cov yeeb nkab.

Qhov txawv ntawm API 5L PSL1 thiab PSL2 rau Welded Steel Pipes

1. Chemical Composition Requirements

•PSL1: Muaj cov kev cai nruj me ntsis rau cov tshuaj muaj pes tsawg leeg. Thaum cov kev txwv tau teeb tsa rau cov ntsiab lus xws li Carbon, Manganese, Sulfur, thiab Phosphorus, kev tswj hwm ntawm Carbon Equivalent (CE) tsis nruj.

• PSL2: Ua kom nruj dua tswj ntawm cov tshuaj muaj pes tsawg leeg. Nws qhia txog kev txwv qis tshaj plaws rau cov khoom tsis zoo (xws li Sulfur thiab Phosphorus) thiab teeb tsa qhov siab tshaj plaws rau Carbon Equivalent (CE) lossis Pcm (Parameter rau Crack Susceptibility). Cov kev tswj nruj dua no yog qhov tseem ceeb rau kev txhim kho weldability, toughness, thiab tsis kam mus rau hydrogen-induced cracking (HIC) thiab sulfide stress cracking (SSC), tshwj xeeb tshaj yog tseem ceeb rau cov kev pabcuam qaub.

2. Mechanical Property Requirements

•PSL1: Qhia qhov tsawg kawg nkaus lub zog thiab lub zog tensile. Kev ntsuam xyuas cuam tshuam (Charpy V-notch) feem ntau tsis tas yuav tsum yog tshwj tsis yog tus neeg yuav khoom tau teev tseg.

•PSL2: Mandates impact testing (Charpy V-notch) rau txhua qib, nrog rau qhov tshwj xeeb absorbed zog qhov tseem ceeb ntawm qhov ntsuas kub (piv txwv li, 0℃lossis -20℃). Qhov no ua kom cov yeeb nkab muaj qhov toughness txaus los tiv thaiv cov pob txha tawg, tshwj xeeb tshaj yog nyob rau hauv qhov chaw txias. PSL2 kuj tseem muaj qhov nruj dua rau kev tawm los thiab lub zog tensile, thiab feem ntau suav nrog cov kev xav tau rau kev kuaj pob txha toughness xws li Kev Ntsuas Ntsuas Ntsuas Ntsuas (DWTT) rau qee qib thiab phab ntsa tuab.

3. Tsis yog -Kev Ntsuam Xyuas Kev Puas Tsuaj (NDT) Yuav Tsum Tau

•PSL1: NDT ntawm vuam seam yog yuav tsum tau, tab sis tus npaum li cas thiab txoj kev tej zaum yuav tsis tshua muaj. Piv txwv li, 100% ultrasonic kuaj (UT) ntawm lub vuam seam tej zaum yuav tsis yuav tsum tau rau tag nrho cov yeeb nkab ntau thiab tsawg los yog qib.

• PSL2: Yuav tsum muaj NDT ntau dua thiab nruj. Rau welded kav, 100% ultrasonic kuaj (UT) ntawm vuam seam yog yuav tsum tau. Kev kuaj hluav taws xob hluav taws xob (RT/X-ray) kuj tseem yuav xav tau rau qee ntu lossis raws li kev xeem ntxiv. Cov kev xav tau nruj NDT no ua kom muaj qib siab tshaj plaws ntawm kev sib txuas ntawm vuam seam kev ncaj ncees thiab kuaj pom qhov tsis xws luag.

4. Kev kho cua sov yuav tsum tau ua

•PSL1: Kev kho cua sov ntawm lub vuam seam (xws li, normalizing lossis tempering) feem ntau xaiv tau tshwj tsis yog tus neeg yuav khoom tau teev tseg.

•PSL2: Rau HFW kav dej, tag nrho lub cev kev kho cua sov los yog weld seam kho cua sov (normalizing los yog normalizing thiab tempering) yog feem ntau yuav tsum tau mus refine lub microstructure ntawm weld thiab tshav kub- cuam tshuam cheeb tsam (HAZ), txo hardness, thiab txhim kho toughness. Rau cov kav dej LSAW, thaum txoj kev SAW nws tus kheej tsis tshua muaj HAZ hardening, kev kho cua sov tshwj xeeb yuav xav tau rau qee qib lossis kev siv.

5. Kho cov kev txwv

•PSL1: Tso cai rau qee hom kev kho vuam seam (piv txwv li, sib tsoo thiab rov- vuam) raws li cov xwm txheej.

•PSL2: Ua kom muaj kev txwv ntau dua ntawm kev kho cov vuam seam. Feem ntau, kev kho yog txwv tsis pub lossis yuav tsum tau rov ua dua - kev sim thiab kev pom zoo ntawm tus neeg yuav khoom, uas cuam tshuam qhov kev xav tau siab dua.

6. Traceability thiab ntaub ntawv

•PSL1: Yuav tsum muaj qhov yooj yim traceability ntawm cov ntaub ntawv thiab cov txheej txheem tsim khoom.

• PSL2: Xav kom muaj kev taug qab, feem ntau xav tau cov ntaub ntawv tag nrho los ntawm cov phaj hlau los ntawm txhua theem kev tsim khoom thiab kev sim. Qhov no ua kom muaj kev lav phib xaub tiav thiab tso cai rau kev txheeb xyuas kom ntxaws thaum muaj teeb meem.

Yog vim li cas qhov txawv no tseem ceeb

Qhov sib txawv ntawm PSL1 thiab PSL2 tsis yog kev txiav txim siab; lawv ncaj qha cuam tshuam nrog kev ua tau zoo, kev nyab xeeb, thiab kev ntseeg siab ntawm cov kav dej, tshwj xeeb tshaj yog cov kev khiav hauj lwm hauv cov xwm txheej hnyav lossis thauj cov khoom phom sij. PSL2 cov kav dej yog tsim los rau cov ntawv thov tseem ceeb dua qhov twg:

• Kev ua haujlwm siab dua yog koom nrog.

• Kev ua haujlwm qis dua yuav tsum tau ua (yuav tsum tau muaj zog dua).

•Sour service (muaj H2S) yog ib qho kev txhawj xeeb (yuav tsum tau HIC/SSC tsis kam).

• Yuav tsum muaj kev tiv thaiv ntau dua rau cov pob txha tawg.

• Txhim kho weld kev ncaj ncees yog qhov tseem ceeb.

Hebei Huayang: Koj tus khub rau API 5L PSL1 thiab PSL2 Pipes

Hebei Huayang Steel Yeeb Nkab Co., Ltd. yog tag nrho nruab thiab ntawv pov thawj los tsim API 5L PSL1 thiab PSL2 welded steel kav, nrog rau LSAW thiab HFW. Peb cov chaw tsim khoom siab heev, kev tswj xyuas zoo, thiab muaj peev xwm kuaj xyuas kom ntseeg tau tias peb cov kav dej ua tau raws li qhov xav tau ntawm koj qhov project.

Peb nkag siab qhov tseem ceeb ntawm kev xaiv PSL qib raug rau koj cov kav dej. Peb pab pawg kws tshaj lij muaj peev xwm los pab koj txiav txim siab seb PSL1 lossis qhov xav tau ntau dua PSL2 yog qhov tsim nyog rau koj daim ntawv thov tshwj xeeb, ua kom muaj kev ua tau zoo, kev nyab xeeb, thiab tus nqi- ua tau zoo. Koom tes nrog Hebei Huayang rau API 5L ntawv pov thawj kav uas xa cov khoom tsis zoo thiab kev ntseeg siab.

Qhov txawv ntawm API 5L PSL1 thiab PSL2 rau Welded Steel Pipes

Hauv kev xaus, kev xaiv ntawm API 5L PSL1 thiab PSL2 rau welded steel kav yog qhov kev txiav txim siab engineering uas cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov kav dej thiab kev nyab xeeb. Thaum PSL1 muab lub hauv paus ruaj khov, PSL2 muaj kev tswj hwm tshuaj zoo dua qub, cov khoom siv kho tshuab zoo dua qub (tshwj xeeb tshaj yog tawv), kev sim nruj dua, thiab kev tswj hwm nruj dua, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov kev xav tau tshaj plaws thiab cov ntawv thov tseem ceeb. Hebei Huayang Steel Pipe Co., Ltd. yog koj qhov chaw cia siab rau ob qho tib si PSL1 thiab PSL2 raws li LSAW thiab HFW kav, engineered rau cov qauv siab tshaj plaws ntawm kev lag luam hluav taws xob thoob ntiaj teb. Tiv tauj peb kom paub tseeb tias koj qhov project tau txais txiaj ntsig los ntawm txoj cai cov yeeb nkab specification.