ASTM A252, ASTM A252yog tus qauv tsim los ntawm lubAmerican Society for Testing thiab Materials (ASTM)rauwelded thiab seamless steel yeeb nkab pawg, nrog qhov tseeb version yogASTM A252 / A252M-22. Cov qauv no qhia txog cov khoom yuav tsum tau muaj, qhov ntev, cov khoom siv kho tshuab, thiab cov txheej txheem tshuaj xyuas cov yeeb nkab steel siv rau hauv cov ntawv thov kev txhawb nqa, suav nrog cov tsev, txuas hniav, chaw nres nkoj, thiab lwm yam engineering.
Steel Qib Classifications:
Gr . 1:Yam tsawg kawg nkaus yield zogNtau dua lossis sib npaug rau 248 MPa (36 ksi)- haum raulub teeb rau nruab nrab loads.
Gr . 2:Yam tsawg kawg nkaus yield zogNtau dua lossis sib npaug rau 345 MPa (50 ksi)- haum raunruab nrab loads.
Gr . 3:Yam tsawg kawg nkaus yield zogNtau dua lossis sib npaug rau 414 MPa (60 ksi)- tsim los rauhnyav loads lossis hnyav ib puag ncig.
Specification
Loj: OD: 406-1422.40mm WT: 1.65-40mm, Ntev: 6mtr-20mtr
Txuj & Qib: ASTM A250 Qib 1,2,3
Xaus: Square Ends / Plain Ends (ncaj txiav, saw txiav, taws txiav), Beveled / threaded Ends
Txheej: 3PE txheej; 3PP txheej; FBE txheej; Epoxy txheej; tshwj xeeb pleev xim
Mechanical Properties – Tensile Requirement
|
|
Qib 1 |
Qib 2 |
Qib 3 |
|
Tensile zog, min, psi |
50,000 |
60,000 |
66,000 |
|
Yield zog |
30,000 |
35,000 |
45,000 |
Cov Khoom Siv Tshuaj Rau A252
|
|
Phosphorus |
|
Seamless thiab Welded |
Max% 0.050 |
•Testing Requirements rau seamless thiab welded A252 steel piling yeeb nkab
-Hydrostatic Testing: Tsis tau teev tseg.
-Kev Xeem Mechanical:
Tensile Test: Ob leeg longitudinal lossis transverse ntawm kev xaiv ntawm cov chaw tsim khoom.
- Number of Tests: Ib qho kev ntsuas tensile ib 200 qhov ntev.
• Tso cai Variations rau A252 steel piling yeeb nkab
- Phab ntsa thickness: Tsis pub ntau tshaj 12.5% raws li nominal phab ntsa thickness teev.
- Nyhav ib ko taw: Qhov hnyav ntawm ib tus neeg ntev ntawm cov yeeb nkab yuav tsum tsis txhob sib txawv ntau dua 15% tshaj lossis 5% raws li qhov hnyav tau teev tseg. Txhua tus neeg ntev yuav tsum tau ntsuas nyias.
- Sab nraud txoj kab uas hla: Yuav tsum tsis txhob sib txawv ntau tshaj qhov ntxiv los yog rho tawm 1% ntawm txoj kab uas hla.
• Ntev ntawm A252 steel piling yeeb nkab
Steel Tubular Khoom A252 steel piling yeeb nkab yuav raug txiav txim nyob rau hauv ib zaug los yog ob zaug random lengths los yog nyob rau hauv niaj hnub ntev.
-Ib leeg random - 16' - 25' suav nrog
-Ob chav random - Tshaj 25' nrog qhov nruab nrab yam tsawg kawg nkaus ntawm 35'
-Uniform – Ntxiv lossis rho tawm 1" ntawm qhov ntev tau teev tseg
• Cov Lus Cog Tseg
Rolled, tuag-stamped, lossis pleev xim-stenciled (chaw tsim khoom xaiv).
-Tus neeg tsim khoom lub npe, hom, lossis lub cim lag luam
-Huab tooj cua sov
-Txoj kev tsim cov yeeb nkab
-Qhov loj, qhov hnyav, ntev
- Phab ntsa thickness
-ASTM A252 thiab qib steel
GNEE ASTM A252 LSAW steel yeeb nkab Kev muag khoom
