ASTM A252 Qib 3 Cov Qauv LSAW (JCOE) Carbon Steel Yeeb Nkab yog hom tshwj xeeb ntawm cov yeeb nkab steel siv rau piling, tsim rau ASTM A252 tus qauv.
ASTM A252 qib 3 yog dab tsi?
A252 GR3 yog tus qauv thiab qib tsim rau cov kav hlau, muab los ntawm A252 tus qauv tsim los ntawm American Society for Testing and Materials (ASTM). Cov qauv no tshwj xeeb tshaj tawm cov kev xav tau rau cov kav hlau welded thiab seamless steel siv rau piling thiab cov hom phiaj zoo sib xws, thiab tau lees paub dav dav thiab siv hauv kev tsim kho engineering.
ASTM A252 Qib 3 Specification
|
Specification |
OD Tsawg dua lossis sib npaug rau 2500mm WT Tsawg dua lossis sib npaug rau 120mm |
||
|
OD |
± 1% Yam tsawg kawg nkaus: ± 0.5mm, siab tshaj: ± 10mm |
||
|
W.T |
-10％ |
||
|
Qhov hnyav |
±6％ |
||
|
Ntev |
Ntev Scope |
4m Tsawg dua lossis sib npaug L Tsawg dua lossis sib npaug li 6m |
± 500 hli |
|
Tsau Ntev |
4m Tsawg dua lossis sib npaug L Tsawg dua lossis sib npaug li 6m |
+10 hli |
|
|
＞6m |
+15 hli |
||
|
Qhov siab ntawm weld hlaws rau Submerged arc welded hollow seem |
Thaum WT Tsawg dua lossis sib npaug rau 14.2, qhov siab ntawm cov hlaws hlaws tsawg dua lossis sib npaug rau 3.5 Thaum WT ＞ 14.2, welded hlaws qhov siab Tsawg dua lossis sib npaug rau 4.8 |
||
Kev tsim cov txheej txheem ntawm ASTM A252
A252 GR3 yeeb nkab piles, dav siv nyob rau hauv kev tsim kho, choj, thiab chaw nres nkoj tej yaam num, muaj ib tug complex txheej txheem ntau lawm nrog rau ob peb kauj ruam tseem ceeb. Hauv qab no yog cov lus qhia ntxaws:
Kev npaj raw khoom
Hlau Phaj Xaiv: Hlau daim hlau ua raws li A252 GR3 tus qauv raug xaiv los ua cov khoom siv raw. Cov phaj no tau dhau los ua cov tshuaj lom neeg muaj pes tsawg leeg thiab kuaj cov cuab yeej cuab tam kom ntseeg tau tias cov ntsiab lus ntawm cov ntsiab lus xws li carbon, manganese, phosphorus, thiab sulfur, nrog rau lub zog tawm los, lub zog tensile, thiab toughness, ua tau raws li tus qauv yuav tsum tau ua.
Kev Npaj Cov Khoom Siv Pabcuam: Vuam cov khoom siv, xws li vuam hlau thiab electrodes, tau npaj. Lawv cov khoom yuav tsum sib phim cov khoom siv los xyuas kom meej vuam zoo. Los tiv thaiv - cov coatings coatings thiab lwm yam khoom pab kuj tau npaj.
Steel Phaj Pretreatment:
Kev Tu Nto: xeb, nplai, roj, thiab lwm yam impurities raug tshem tawm ntawm lub phaj hlau siv txoj hauv kev xws li kev tua blasting thiab sandblasting kom ua tiav ib theem ntawm kev huv, txhim kho qhov zoo ntawm cov tha xim tom qab thiab vuam. ** Kev Kho Hniav Qib: ** Leveling lub phaj steel tshem tawm khoov, waviness, thiab lwm yam deformations uas tshwm sim thaum dov lossis tsheb thauj mus los, ua kom lub phaj flatness thiab muab cov kev mob zoo rau cov txheej txheem tom ntej dov thiab vuam.
Rolling txoj kev:
Kev Ua Haujlwm Rolling: Lub pre- kho steel phaj yog pub rau hauv lub tshuab dov, qhov twg cov menyuam yob txuas ntxiv mus rau hauv cov duab cylindrical. Thaum lub sij hawm dov, qhov ceev, siab, thiab dov lub kaum sab xis yuav tsum tau tswj nruj me ntsis kom ntseeg tau tias lub tog raj kheej txoj kab uas hla thiab ellipticity raws li cov qauv tsim.
Butt Welding: Tom qab cov phaj hlau tau dov rau hauv lub tog raj kheej, nws ob qhov kawg yog pob tw -welded los ua ib txoj kab ntev weld seam, lossis ncaj seam. High-efficiency, siab- vuam txheej txheem zoo li submerged arc vuam feem ntau yog siv. Vuam tsis, xws li tam sim no, voltage, thiab vuam ceev, yuav tsum tau nruj me ntsis tswj kom zoo weld zoo.
Weld Inspection thiab Shaping:
Tsis yog-Kev kuaj kev puas tsuaj: Tsis yog-Kev kuaj kev puas tsuaj yog ua rau ntawm cov kav hlau txuas ncaj nraim. Cov txheej txheem muaj xws li kuaj ultrasonic thiab kuaj radiographic. Cov txheej txheem tshuaj xyuas no tuaj yeem kuaj xyuas qhov tsis xws li porosity, slag inclusions, thiab tawg hauv qhov vuam, thiab cov teeb meem no tuaj yeem raug cim thiab ntsuas.
Kev tuav tsis raug: Rau kev kuaj pom qhov tsis xws luag, nyob ntawm seb lawv hom thiab qhov hnyav, cov txheej txheem xws li kev sib tsoo thiab kho vuam siv los xyuas kom meej qhov vuam zoo raws li cov qauv yuav tsum tau ua.
Kev Ua Haujlwm Zoo: Cov cuab yeej tshwj xeeb shaping yog siv los tsim cov yeeb nkab welded, ntxiv kho nws txoj kab uas hla, ovality, thiab ncaj kom ua tau raws li qhov ntev thiab cov qauv tsim.
Xaus kev ua haujlwm thiab kev tiv thaiv corrosion
Kev Ua Haujlwm Kawg: Raws li cov kev xav tau ntawm cov yeeb nkab pawg, qhov kawg ntawm cov kav dej welded raug txiav thiab beveled los pab txhawb kev sib txuas thiab kev teeb tsa ntawm cov yeeb nkab.
Kev Tiv Thaiv Corrosion: Txhawm rau txhim kho corrosion kuj ntawm cov yeeb nkab pawg thiab txuas ntxiv lawv lub neej kev pab cuam, kev kho corrosion yog siv. Cov txheej txheem tiv thaiv corrosion feem ntau suav nrog txheej txheej tiv thaiv corrosion (xws li epoxy hmoov txheej, polyethylene txheej, thiab lwm yam) thiab hlau plating corrosion tiv thaiv (xws li kub-dip galvanizing).
Kev soj ntsuam zoo thiab ntim khoom
Kev tshuaj xyuas zoo: Kev tshuaj xyuas zoo yog ua tiav ntawm A252 GR3 cov yeeb nkab ua tiav, suav nrog kev tshuaj xyuas qhov ntev, kev tshuaj xyuas zoo li qub, thiab kev ntsuas khoom siv tshuab. Qhov no ua kom ntseeg tau tias txhua qhov kev ua tau zoo ntawm cov yeeb nkab pawg ua tau raws li A252 tus qauv thiab cov kev cai ntawm kev tsim qauv engineering.
Ntim thiab warehouseing: Cov khoom kuaj xyuas thiab tsim nyog cov yeeb nkab yog ntim, feem ntau yog siv txoj hauv kev xws li bundling thiab siv xeb-cov roj tiv thaiv, thiab tom qab ntawd muab tso rau hauv lub warehouse, tos cov khoom xa tuaj rau ntau qhov chaw ua haujlwm.
