A252 GR3 kauv welded yeeb nkab yog ib hom kauv welded steel yeeb nkab ua los ntawm qis- alloy structural steel, ua raws li Qib 3 ntawm ASTM A252 tus qauv. Nws cov yam ntxwv tseem ceeb suav nrog:
Siab zog: Tawm lub zog Ntau dua lossis sib npaug li 310 MPa, lub zog tensile Ntau dua lossis sib npaug li 455 MPa.
Corrosion kuj: Haum rau kev thauj khoom mus tas li-cov qauv kabmob lossis cov pob zeb ua pob zeb.
Qhov ntau thiab tsawg: Phab ntsa thickness 0.8-6 hli, sab nraud txoj kab uas hla feem ntau Ntau dua los yog sib npaug li 219 hli.
Cov txheej txheem tsim khoom siv cov cuab yeej siv kauv vuam, nrog kub - dov kom ntseeg tau cov qauv kev ncaj ncees. Cov tsis muaj xws li hydrostatic test siab thiab tso cai rau kev khiav hauj lwm kub, raws li teev nyob rau hauv tus qauv ASTM A252.
astm a252 qib 3 sib npaug
Tsis muaj ib qho, ncaj qha sib npaug rau ASTM A252 Qib 3, vim nws yog cov khoom siv tshwj xeeb rau cov yeeb nkab, tab sis nws muaj tib yam khoom siv raws li ASME SA252 Qib 3 tus qauv. Nws qhov sib npaug ze tshaj plaws yog lwm cov qib steel uas zoo sib xws siab tensile thiab yield zog, xws li EN 10219 thiab kev sib piv rau ASTM A500, uas yog siv rau kev tsim qauv tab sis muaj lub zog qis dua.
a252 qib 3 yield zog
Qhov tsawg kawg nkaus tawm lub zog rau ASTM A252 Qib 3 yog45,000 psi (310 MPa). Qib ntawm cov yeeb nkab steel no feem ntau yog siv rau hnyav- cov haujlwm piling daim ntaub ntawv, xws li nyob rau hauv lub hauv paus rau siab - nce tsev thiab txuas hniav, vim nws lub zog siab.
- Yield zog:45,000 psi (310 MPa)
- Elongation: 20%
astm a252 qib 3 tensile zog
Qhov tsawg kawg nkaus tensile zog rau ASTM A252 Qib 3 yog66,000 psi (455 MPa). Cov qib no kuj muaj qhov tsawg kawg nkaus lub zog ntawm 45,000 psi (310 MPa) thiab feem ntau yog siv rau cov yeeb nkab piling vim nws lub zog siab.
- Tensile zog:66,000 psi (455 MPa) yam tsawg kawg nkaus
astm a252 qib 3 tshuaj muaj pes tsawg leeg
Cov tshuaj muaj pes tsawg leeg ntawm ASTM A252 Qib 3 hlau yog feem ntau txhais los ntawm nws cov ntsiab lus phosphorus, uas yuav tsum tsis pub ntau tshaj O.050%. Cov hlau tseem muaj lwm cov ntsiab lus, xws li carbon, manganese, silicon, thiab sulfur, uas ua rau nws muaj zog thiab kav ntev.
Phosphorus (P): Tsawg dua lossis sib npaug rau 0.050%
Lwm cov ntsiab lus: Cov hlau kuj muaj carbon, manganese, silicon, thiab sulfur.
Lus Cim: Cov feem pua ntawm cov pa roj carbon, manganese, silicon, thiab sulfur tsis tau teev meej meej hauv cov txiaj ntsig kev tshawb fawb, raws li A252 tus qauv tsom rau phosphorus yog qhov tseem ceeb txwv rau qib no.
astm a252 qib 3 ntom
Qhov ceev ntawm ASTM A252 Qib 3 yog kwv yees li 7850 kg / m² (0.284 1b / in²), uas yog tus qauv ntom rau carbon steel. Tus nqi no tsis yog cov khoom siv- cov khoom tshwj xeeb uas tau teev tseg hauv A252 tus qauv nws tus kheej, tab sis cov cuab yeej dav dav ntawm cov hlau siv los xam qhov hnyav raws li ntim, uas yog qhov tseem ceeb rau kev txiav txim siab qhov hnyav ntawm cov kav dej hauv ib chav tsev ntev.
ASTM a252 qib 3 specifications
astm a252 qib 3 txheej txheem vuam
- Kev npaj raw khoom
Tsawg- alloy structural steel coil daim hlau yog siv, uas yuav tsum tau kuaj xyuas ultrasonic kom tsis muaj kab nrib pleb, laminations, lossis lwm yam tsis xws luag. Qhov zoo ntawm vuam hlau thiab flux kuj raug tshuaj xyuas.
- Kauv Forming thiab Vuam
Flattening thiab Trimming: Cov hlua hlau yog flattened los ntawm lub tshuab xovxwm anvil, thiab cov npoo yog deburred los ntawm lub tshuab trimming.
Kauv Curling: Cov hlua hlau yog curled rau hauv cov yeeb nkab tsis pub dhau los ntawm lub tshuab ua cov kauv, ua cov kauv - zoo li tus yeeb nkab raj.
Ob npaug -Submerged Arc Vuam: A longitudinal multi-wire submerged arc welding txheej txheem yog siv los ua ib txhij welds sab hauv thiab sab nrauv, nrog rau qhov tob tob ntawm ntau dua lossis sib npaug li 1.5 hli.
Kub Rolling Control: Cov txheej txheem kub dov thaum lub sij hawm tsim ua kom cov yeeb nkab lub cev muaj zog ua tau raws li lub zog tawm los ntawm ntau dua lossis sib npaug rau 310 MPa.
- Kev soj ntsuam zoo
Kev tshuaj xyuas Weld: 100% tsis siv neeg kuaj ultrasonic yog ua, thiab X-ray tshuaj xyuas yog ua nyob rau ntawm kev sib tshuam ntawm cov hlau sawb pob tw welds thiab kauv welds.
Kev Ntsuas Hydrostatic: Txhua lub yeeb nkab tau kuaj xyuas hydrostatic, thiab cov ntaub ntawv siab tau raug kaw.
Pipe End Machining: Mechanical processing controls the end face perpendicularity and bevel angle raug.
- Kev kho cov khoom tiav
Cov kav dej tsim nyog tau coated nrog cov roj los tiv thaiv- xeb, cim raws li cov qauv, thiab yuav tsum ua kom tau raws li cov txheej txheem kev ua haujlwm ntawm lub zog tensile ntau dua lossis sib npaug rau 455 MPa rau ASTM A252 GR3 kauv welded kav.
