1. API 5L PSL1 yog dab tsi?
Teb:API 5L yog ib qho kev qhia tshwj xeeb rau cov yeeb nkab steel, luam tawm los ntawm American Petroleum Institute (API). Nws npog seamless thiab welded steel kav rau thauj roj, dej, thiab roj hauv kev lag luam pipeline. PSL1 stands rau "Product Specification Level 1." Nws yog tus txheej txheem theem nrog cov txheej txheem ntawm cov kev cai rau cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, thiab kev sim.
2. Dab tsi yog qhov txawv ntawm PSL1 thiab PSL2?
Teb:PSL2 muaj cov kev cai nruj dua li PSL1. Qhov sib txawv tseem ceeb suav nrog:
Toughness:PSL2 yuav tsum tau Charpy V-Kev ntsuas qhov cuam tshuam, thaum PSL1 tsis ua.
Tshuaj muaj pes tsawg leeg:PSL2 muaj kev txwv nruj dua ntawm cov pa roj carbon sib npaug (CE) kom ntseeg tau tias qhov vuam zoo dua.
Strength Variability:PSL2 muaj kev txwv nruj dua ntawm qhov sib txawv ntawm tensile thiab tawm lub zog.
Tsis yog -Kev kuaj kev puas tsuaj (NDT):PSL2 yuav tsum muaj NDT ntau dua ntawm cov hlua khi ntawm cov kav dej welded.
3. Cov qhab nia uas muaj nyob hauv API 5L PSL1 yog dab tsi?
Teb:Cov qhab nias rau PSL1 suav nrog Qib A, Qib B, X42, X46, X52, X56, X60, X65, X70, thiab siab dua. Cov qib "X" qhia qhov tsawg kawg nkaus tawm lub zog hauv ksi (txhiab phaus ib square inch). Piv txwv li, X52 muaj qhov tsawg kawg nkaus yield zog ntawm 52,000 psi.
4. Puas yog Charpy Impact Testing rau PSL1 yeeb nkab?
Teb:Tsis yog. Charpy V-Qhov kev ntsuam xyuas qhov cuam tshuam los ntsuas kev puas ntsoog toughness feem ntau tsis yog qhov yuav tsum tau ua rau API 5L PSL1 yeeb nkab. Nws yog ib qho tseem ceeb feature uas txawv nws ntawm PSL2. Txawm li cas los xij, nws tuaj yeem teev tau raws li qhov yuav tsum tau ua ntxiv (SR) yog tias pom zoo ntawm tus neeg yuav khoom thiab cov chaw tsim khoom.
5. Dab tsi yog cov txheej txheem tsim khoom rau PSL1 yeeb nkab?
Teb:API 5L PSL1 yeeb nkab tuaj yeem tsim raws li:
Seamless (S):Ua los ntawm kev tho ib lub pob zeb ntawm cov hlau, ua rau cov yeeb nkab tsis muaj welded seam.
Welded (W):Ua los ntawm kev tsim steel phaj los yog skelp thiab ces welding lub seam. Cov txheej txheem muaj xws li Electric Resistance Vuam (ERW), Submerged Arc Vuam (SAW), thiab Laser Vuam.
