API 5L L360M ncaj seam yeeb nkab yog lub siab -kev ua tau zoo thauj cov yeeb nkab dav siv hauv kev thauj mus los ntawm lub zog xws li roj thiab roj. Cov yeeb nkab steel no ua raws li API 5L tus qauv, yog ua los ntawm L360M cov khoom, thiab muaj cov khoom siv zoo heev thiab cov khoom siv weldability, ua tau raws li cov kev xav tau ntawm kev thauj mus los hauv ib puag ncig hnyav xws li kev kub siab thiab kub.
yam ntxwv
L360M ncaj seam welded yeeb nkab belongs rau PSL2 qib pipeline steel hauv API 5L tus qauv. Hauv nws lub npe, "L" sawv cev rau cov raj xa dej, "360" qhia qhov tsawg kawg nkaus lub zog ntawm 360 MPa (52,000 psi), thiab "M" qhia txog Thermo-Mechanical Controlled Process (TMCP). Cov khoom no ua tiav qhov sib npaug ntawm lub zog siab thiab zoo toughness los ntawm microalloying tsim thiab tswj dov thiab txias txheej txheem:
1. Chemical Composition: Tsim muaj cov pa roj carbon tsawg (feem ntau<0.16%) and low sulfur and phosphorus (<0.025%), with the addition of microalloying elements such as Nb, V, and Ti, improving strength while ensuring weldability.
2. Mechanical Properties: Yield strength >360 MPa, tensile strength 460-760 MPa, elongation >20%, Charpy impact energy at -20°C >40 J, ua tau raws li qhov xav tau ntawm ib puag ncig hnyav.
3. Cov khoom tshwj xeeb: Hla HIC (hydrogen{1}}induced cracking) thiab SSC (sulfide stress corrosion), haum rau acidic ib puag ncig uas muaj hydrogen sulfide.
Daim ntawv thov thiab qhov zoo
Ntev -Kev thauj mus los ntawm Roj thiab Roj
Nyob rau hauv Tuam Tshoj-Russia East Route Natural Gas Pipeline project, L360M ncaj seam steel kav yog siv rau ob ceg kab, kev khiav hauj lwm ntawm siab txog li 10MPa, nrog rau ib xyoos ib zaug muaj peev xwm kis tau tus mob ntau tshaj 30 billion cubic meters. Txoj haujlwm no tshwj xeeb yuav tsum muaj Charpy cuam tshuam lub zog ntawm Ntau dua lossis sib npaug ntawm 80J ntawm -30℃thiab DWTT qhov chaw kuaj shear ntawm Ntau dua lossis sib npaug rau 85%.
Sab Hnub Poob-East Gas Pipeline III qhov project tau txais kev sib xyaw ua ke ntawm cov kav dej X80M thiab L360M. L360M cov kav dej yog siv nyob rau hauv geologically tsis ruaj tsis khov, siv lawv zoo heev deformation muaj peev xwm (khoov vojvoog txog 40D) hloov mus rau struts hloov.
Offshore Platform Riser
Nyob rau hauv ib txoj haujlwm tsim kho roj av hauv South Tuam Tshoj Hiav Txwv, tshwj xeeb tshaj yog kho L360MSE (acid-}tiv thaiv version) welded kav yog siv los ua cov risers ntau lawm. Cov phab ntsa tuab tsim ua rau kom muaj kev tiv thaiv corrosion los ntawm 2 hli, thiab cov qauv sib xyaw ntawm 3LPE los tiv thaiv - txheej txheej corrosion + pob zeb counterweight txheej yog siv, ncua kev pab cuam lub neej mus rau 30 xyoo.
Nroog Gas Pipeline Networks
Nyob rau hauv siab -siab Class A pipeline network renovation tej yaam num nyob rau hauv megacities xws li Beijing, Shanghai, Guangzhou, thiab Shenzhen, lub Φ508 × 11.1mm specification yeeb nkab tau dhau los ua cov kev xaiv vim nws zoo heev seismic kev ua tau zoo (tuaj yeem tiv taus av acceleration ntawm 0.4g). Cov ntaub ntawv los ntawm ib tus neeg muag khoom qhia tau hais tias qhov ntim ntawm kev yuav khoom rau cov haujlwm hauv nroog tau nce 35% xyoo-rau- xyoo hauv 2024.
Daim ntawv thov ib puag ncig tshwj xeeb
Kazakhstan ntu ntawm Central Asia-Tuam Tshoj Gas Pipeline siv kwv yees li 120 mais ntawm L360M ncaj seam welded yeeb nkab, uas tau dhau los qis- ntsuas kub ntawm -45℃thiab ua tiav 100% DWTT (Digital Wave Test) dhau tus nqi.
Hauv kev txhawb nqa photovoltaic, nyias -walled L360M welded yeeb nkab (phab ntsa thickness 2.5-4mm) yog siv, nrog rau lub neej voj voog nqi 18-22% qis dua li cov khoom siv Q235.
