ASTM A252 yog tus qauv tsim tshwj xeeb rau kev siv nrog cov yeeb nkab steel tubing.
ASTM A252 siv rau cov kav dej uas lub tog raj kheej hlau ua haujlwm ua ib qho khoom thauj khoom tas mus li, lossis ua lub plhaub los tsim cov kav dej sib xyaw ua ke.
Qib 2 thiab qib 3 yog ob qib no.
A252 muab faib ua peb qib nrog cov khoom siv kho tshuab zoo dua qub.
Lawv yog: Qib 1, Qib 2, thiabQib 3.
Qib 2 thiab Qib 3 yog cov qib siv ntau tshaj plaws hauv ASTM A252, thiab peb piav qhia txog cov khoom ntawm ob qib kom ntxaws ntxiv tom ntej.
ASTM A252tuaj yeem tsim los ntawm kev sib khi tsis sib xws, kev vuam tsis kam, kev vuam ceev ceev, lossis cov txheej txheem vuam fusion.
Hauv cov ntawv thov rau cov yeeb nkab, cov yeeb nkab hlau tsis muaj seamless muab kev txhawb nqa zoo heev vim lawv lub zog siab thiab cov yam ntxwv sib xws.
Tsis tas li ntawd xwb, cov kav hlau tsis muaj seamless tuaj yeem tsim nrog cov phab ntsa tuab heev, uas tso cai rau lawv kom tiv taus kev ntxhov siab ntau dua, ntxiv kev txhim kho lawv txoj kev ntseeg siab hauv cov qauv txhawb nqa.
Txawm li cas los xij, cov kav hlau tsis muaj seamless tuaj yeem tsim tau txog li qhov siab tshaj plaws ntawm 660 hli, uas txwv lawv siv rau hauv cov ntawv thov uas xav tau cov pawg loj dua. Hauv qhov no,LSAW(Longitudinal Submerged Arc Welded) thiabSSAW(Spiral Submerged Arc Welded) cov kav hlau muaj txiaj ntsig zoo dua.
Cov ntsiab lus phosphorus yuav tsum tsis pub tshaj 0.050%.
Tsis tas yuav muaj lwm yam khoom ntxiv.
Lub Zog Tensile thiab Lub Zog Yield lossis Yield Point
| Qib 2 | Qib 3 | |
| Lub zog tensile, min | 60000 psi[415 MPa] | 60000 psi[415 MPa] |
| Yield point los yog Yield zog, min | 35000 psi[240 MPa] | 45000 psi[310 MPa] |
Kev ntev
Cov ntsiab lus tshwj xeeb tuaj yeem pom hauvASTM A252 Cov Lus Qhia Txog Cov Yeeb Nkab Piled.
| Daim Ntawv Teev Npe | Xaiv | Scope |
| Qhov hnyav | Qhov Hnyav Theoretical | 95% - 125% |
| Sab Nraud Txoj Kab uas hla | Qhov Taub Sab Nraud Uas Tau Qhia Tseg | ± 1% |
| Phab ntsa tuab | teev tseg nominal phab ntsa thickness | tsawg kawg 87.5% |
| Ib qho ntev random | 16 txog 25 ft [4.88 txog 7.62 m], nti |
| Ob chav ntev random | tshaj 25 ft [7.62 m] nrog qhov nruab nrab tsawg kawg yog 35 ft [10.67 m] |
| Qhov ntev sib xws | ntev raws li tau teev tseg nrog kev hloov pauv ntawm ± 1 nti. |
ASTM A370: Cov Txheej Txheem Xeem thiab Cov Lus Txhais rau Kev Xeem Khoom Siv Hlau;
ASTM A751: Cov Txheej Txheem Xeem, Kev Xyaum, thiab Cov Lus Siv rau Kev Tshuaj Xyuas Tshuaj ntawm Cov Khoom Hlau;
ASTM A941: Cov Lus Hais Txog Hlau, Hlau Tsis Xeb, Cov Khoom Sib Txuas, thiab Ferroalloys;
ASTM E29: Kev Xyaum Siv Cov Naj Npawb Tseem Ceeb Hauv Cov Ntaub Ntawv Xeem Los Txheeb Xyuas Kev Ua Raws Li Cov Lus Qhia;
Botop Steel yog cov chaw tsim khoom thiab cov chaw muag khoom ntawm cov yeeb nkab carbon steel zoo los ntawm Tuam Tshoj, thiab tseem yog cov chaw muag khoom ntawm cov yeeb nkab steel seamless, muab ntau yam kev daws teeb meem rau koj!
ASTM A252 GR.3 Cov Qauv LSAW (JCOE) Cov Yeeb Nkab Hlau Carbon
