ASTM A252 qib 3 yog dab tsi?
ASTM A252 GR3 steel yeeb nkab yog welded structural steel yeeb nkab uas ua raws li cov qauv ntawm American Society for Testing and Materials (ASTM). Nws yog tsim tshwj xeeb rau kev sib sib zog nqus hauv paus engineering thiab yog tsim los ntawm ob qho tib si longitudinal seam vuam (EFW) lossis kauv vuam (SAW) cov txheej txheem. Lub luag haujlwm tseem ceeb ntawm cov yeeb nkab no yog hloov cov khoom thauj los ntawm cov tsev lossis txuas hniav mus rau qhov tob, ruaj khov hauv av txheej. Nrog lub zog tawm los ntawm Ntau dua lossis sib npaug ntawm 345 MPa, nws yog qhov tsim nyog rau siab -load scenarios xws li cov hauv paus hauv paus ntawm tus ntoo khaub lig- hiav txwv txuas hniav thiab cov qauv kev txhawb nqa rau offshore cua turbine tsho.
ASTM A252 qib 3 yeeb nkab pawg specification
Kev siv:rau hom kev tivthaiv, qhov chaw, kua xa cov yeeb nkab thiab lwm yam kev tsim kho.
Loj:
Sab nraud txoj kab uas hla: 21.3mm-610mm (1/2 "-24")
Phab ntsa Thickness: 1mm-22mm
Ntev: 0.5mtr-20mtr
Xaus:square xaus (ncaj txiav, saw txiav, thiab taws txiav). los yog beveled rau vuam, beveled,
Nto:Lightly oiled, Kub dip galvanized, Electro galvanized, Dub, Liab qab, Varnish txheej / Anti xeb roj, Tiv thaiv txheej (Coal Tar Epoxy, Fusion Bond Epoxy, 3-txheej PE)
Tshuaj muaj pes tsawg leeg:
| Lub ntsiab | Qhov siab tshaj (%) |
|---|---|
| Cov pa roj carbon (C) | 0.26 |
| Manganese (Mn) | 1.60 |
| Phosphorus (P) | 0.50 |
| Sulfur (S) | 0.045 |
Mechanical Properties:
| Lub zog | Qib 3 |
|---|---|
| Yield zog | 45,000 psi min. |
| Tensile zog | 66,000 psi min. |
Kev sim
Kev Ntsuas Kub: Txwv P, daim ntawv qhia txog cua sov yuav tsum tau teev nyob rau hauv MTC rau cov neeg siv khoom.
Kev tshuaj xyuas khoom: Kev xeem zaus yuav tsum tau txais los ntawm cov yeeb nkab sib txawv, tshwj xeeb tshaj yog nyob rau hauv 14 nti 2 qauv ib 200 daim, 14 mus rau 36 nti 2 qauv ib 100 daim, saum 36 nti yog 2 rau 3000 ft.
Tensile xav tau: Raws li tus nqi A252. Nyob rau hauv cov ntaub ntawv tau txais ib tug vague yield point, ces sim yield zog sib raug mus rau ib tug mus tas li offset ntawm 0.2% ntawm lub gage ntev ntawm tus qauv coj mus kuaj, los yog mus ntsuam xyuas tag nrho extension ntawm 0.5% ntawm lub gage ntev nyob rau hauv load.
ASTM A252 GR3 steel yeeb nkab (yield zog Ntau dua lossis sib npaug ntawm 345 MPa) feem ntau yog siv rau hauv siab -load daim ntawv thov xws li:
Hla - hiav txwv choj pawg hauv paus: Raws li kev thauj khoom mus tas li-cov kabmob cov qauv, tiv taus seawater corrosion thiab mos silt txheej loads.
Offshore cua turbine tsho: Txhawb cov qauv ntauwd, xav tau -45℃cuam tshuam toughness thiab yoj tsis kam.
LNG tank tiv thaiv- pawg ntab: Siv nyob rau hauv tej yaam num xws li CGN East LNG davhlau ya nyob twg los tiv thaiv lub tank uplift thiab tiv taus ultra- kub tsawg.
Kev kuaj thiab tshuaj xyuas
Ntim thiab shipping
