API 5L X70 PSL2 SSAW Pipe

API 5L X70 PSL2 yeeb nkab yog cov yeeb nkab uas muaj zog thiab siab tawv steel cov khoom siv dav siv hauv cov kav dej rau kev lag luam xws li roj av, roj av, tshuaj lom neeg, thiab hluav taws xob. Lub zog yield ntawm API 5L X70 PSL2 kauv welded yeeb nkab ranges ntawm 485 MPa rau 605 MPa, thaum nws lub zog tensile ranges ntawm 570 MPa rau 760 MPa, nrog rau qhov siab tshaj plaws yield-rau-tensile piv ntawm 0.93.

API 5L X70 PSL2 SSAW Pipe rau Roj thiab Roj Specification

API 5L X70 PSL2 SSAW Pipe

API 5L X70 PSL2 Kauv Pipe Kev Tshuaj Xyuas:

Kev tshuaj xyuas qhov muag:Kev tshuaj xyuas saum npoo yuav tsum pom qhov kev kuaj xyuas cov pob qij txha. Nws yog ib txoj hauv kev yooj yim thiab siv dav hauv kev tshuaj xyuas cov khoom kawg, feem ntau txhawm rau txheeb xyuas qhov tsis xws luag thiab qhov sib txawv ntawm qhov sib txawv ntawm qhov vuam seam nto. Kev tshuaj xyuas no feem ntau yog ua los ntawm qhov muag liab qab, pab los ntawm cov qauv qauv, ntsuas ntsuas, thiab tsom iav tsom iav. Deg defects ntawm lub weld seam qhia tias muaj peev xwm sab hauv.

Kev tshuaj xyuas lub cev:Txoj kev tshuaj xyuas lub cev nrog rau kev siv lub cev tshwm sim rau kev ntsuas lossis ntsuas. Kev tshuaj xyuas ntawm cov khoom tsis xws luag hauv cov khoom lossis cov khoom ua haujlwm feem ntau yog siv cov kev sim uas tsis muaj kev puas tsuaj xws li kuaj ultrasonic, kuaj hluav taws xob, kuaj tshuaj zas, thiab kuaj cov khoom sib nqus.

Pressure Vessel Strength Test:Ntxiv nrog rau kev ntsuas kev sib khi, cov hlab ntsha siab tau raug kuaj xyuas lub zog. Cov kev ntsuam xyuas feem ntau suav nrog kev sim hydrostatic thiab pneumatic kuaj. Ob qhov kev ntsuam xyuas ntsuas qhov vuam seam kev ncaj ncees ntawm cov hlab ntsha thiab cov kav dej hauv qab lub siab. Kev ntsuas pneumatic yog qhov rhiab thiab nrawm dua li kev sim hydrostatic. Tom qab qhov kev sim, cov khoom tsis tas yuav tsum tau cov kua dej, ua rau nws tshwj xeeb tshaj yog haum rau cov khoom uas cov kua dej tsis yooj yim. Txawm li cas los xij, kev sim pneumatic muaj kev pheej hmoo ntau dua, yuav tsum tau ua raws li cov kev ntsuas kev nyab xeeb tsim nyog thaum lub sij hawm kuaj xyuas kom tsis txhob muaj xwm txheej.

Leak Tightness Test:Welded ntim khaws cia cov kua los yog gases raug kuaj xyuas kom nruj kom pom qhov tsis nruj ntawm qhov vuam seam, xws li nkag mus rau cov kab nrib pleb, cov hnab ntim roj, cov slag suav nrog, kev nkag tsis tiav, thiab cov qauv ntxeem tau. Cov txheej txheem rau kev soj ntsuam nruj nruj xws li kuaj roj av, ntsuas dej puv, thiab ntsuas dej dav hlau.

Hydrostatic Test:Txhua cov yeeb nkab steel yuav tsum tau kuaj xyuas hydrostatic yam tsis muaj qhov to. Qhov ntsuas siab yog xam raws li tus qauv P=2ST/D, qhov twg S yog qhov ntsuas kev ntxhov siab hauv MPa. Qhov kev ntsuam xyuas kev ntxhov siab rau kev kuaj hydrostatic yog xaiv ntawm 60% ntawm qhov tsawg kawg nkaus yield zog raws li tau teev nyob rau hauv tus qauv steel sawb (xws li, Q235 yog 235 MPa). Lub sijhawm ruaj khov thaum lub sijhawm ntsuas yuav tsum yog tsawg kawg 5 vib nas this rau D<508 and at least 10 seconds for D≥508.

Kev kuaj tsis raug:Weld seams, strip-to-head welds, thiab circumferential seams ntawm cov kav hlau yuav tsum tau kuaj X-ray lossis ultrasonic rau kev kho vuam. Rau kauv welds siv rau cov khoom siv hluav taws xob thauj khoom, 100% SX-ray lossis kuaj ultrasonic yuav tsum tau ua. Rau cov kav dej steel siv rau dej, dej phwj tuaj, cua, cua sov chav, thiab lwm yam kev thauj mus los ntawm cov kua dej zoo tib yam, cov kav hlau txuas yuav tsum tau kuaj X-ray lossis ultrasonic kuaj (20%).

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