Nyob rau theem twg ntawm cov roj thiab roj tsheb thauj mus los yog S355JR roj pipeline feem ntau siv?
S355JR steel kavFeem ntau yog siv nyob rau hauv nruab nrab theem ntawm kev thauj mus los ntawm cov roj thiab roj, rau kev tsim lub ntev -cov roj crude thiab natural gas pipelines, raws li zoo raws li offshore thiab onshore pipelines.
Cov qauv kev lag luam roj thiab roj dab tsi yuav tsum S355JR cov kav dej ua raws li?
S355JR steel kavsiv nyob rau hauvroj thiab rojKev lag luam yuav tsum ua raws li European cov qauv, xws li EN 10219 (hollow profiles). Raws li cov kev cai tshwj xeeb, qhov chaw, thiab daim ntawv thov ntawm qhov project, lawv kuj yuav tsum tau ua raws li ASTM A53, ASTM A106, lossis API 5L (lwm hom kav dej thiab kev siv) cov qauv.
Cov txheej txheem vuam dab tsi feem ntau yog siv rau S355JR roj thiab roj xa hluav taws xob steel kav?
Lub ntsiab vuam txheej txheem rauS355JR roj thiab roj kis tau tus mob steel kavyog longitudinal submerged arc vuam (LSAW) thiab muab kauv submerged arc vuam (SSAW). Resistance welding (ERW) yog siv rau me me - txoj kab uas hla, qis - kev siv siab.
Dab tsi yog siv los tiv thaiv- txoj kev kho corrosion rau S355JR roj thiab roj xa hluav taws xob steel kav?
Common anti-kev kho corrosion rauS355JR roj thiab roj kis tau tus mob steel kavsuav nrog cov txheej txheem tiv thaiv, xws li 3PE (peb- txheej polyethylene) txheej (suav los ntawm fusion-bonded epoxy primer, nplaum, thiab polyethylene txheej txheej), polyurethane coatings, thiab coal tar pitch coatings.
Dab tsi yog qhov siab tshaj plaws ua haujlwm ntawm S355JR roj thiab roj xa hluav taws xob steel kav?
Qhov siab tshaj plaws tsis kam ntawmS355JR steel kavtsis yog tus nqi ruaj khov. Nws nyob ntawm cov yeeb nkab loj (inch, phab ntsa thickness) thiab kev ua haujlwm, tab sis nws muaj feem cuam tshuam ncaj qha rau nws qhov tsawg kawg nkaus yield zog. Qhov tsawg kawg nkaus tawm lub zog rau cov kav hlau steel nrog phab ntsa tuab tsis tshaj 16 hli yog 355 MPa.
