ASTM A252 Qib 2 Piling steel yeeb nkab desription
ASTM A252 GR2 yeeb nkab piles yog muab kauv submerged arc welded yeeb nkab pawg uas ua raws li American Society for Testing and Materials (ASTM) tus qauv thiab tau tsim tshwj xeeb rau kev thauj khoom -cov kabmob hauv engineering engineering.
Plaub Qhov Zoo Tshaj Plaws:
High Load-Bearing Efficiency: Compressive zog mus txog 455MPa, ib pawg bearing muaj peev xwm Ntau dua los yog sib npaug rau 8000kN, txo cov pawg los ntawm 30% thiab txo cov nqi hauv paus.
Compressive Stability: Kauv weld seam disperses kev ntxhov siab, axial compressive zog yog 15-20% siab dua ncaj seam welded yeeb nkab (LSAW), haum rau choj pawg hauv paus hauv av qeeg.
Kev yooj yim ntawm kev tsim kho: Tus qauv ntev 6-24m (tuaj yeem txiav rau ntawm qhov chaw), kev tsim kho ceev 30 pawg / hnub, tsis tas yuav kho, txo lub sijhawm tsim kho los ntawm 40%.
Kev lag luam: Tus nqi 35% qis dua seamless yeeb nkab thiab 15% qis dua GR3 qib yeeb nkab piles, thawj qhov kev xaiv rau tej yaam num ib ntus (xws li lub hauv paus pit support).
ASTM A252 Gr 2 yeeb nkab Specification
Loj: 1/2 txog 24 nti
Teem sijhawm: 10 txog 160
OD: 15-600 NB
Kev kho cua sov: N, A, QT, SR
Hom: Seamless
Xaus: Beveled, Plain, Threaded
Puab: Square, Round, Rectangular
Kev xeem yuav tsum muaj: Hardness, Tsis yog - kev puas tsuaj, Hardenability, Tension, Flaring Test
A252 GR2 Welded yeeb nkab Lub cev xav tau
| Qib | Tawm tswv yim (min) | Tensile (min) | Elongation (min) |
| Qib 2 | 35,000 psi | 60,000 psi | Txiav txim los ntawm phab ntsa |
A252 GR2 VS API 5L
| Yam khoom | A252 GR2 | API 5L X52 |
|---|---|---|
| Yield zog | Ntau tshaj los yog sib npaug rau 310 MPa (tso cai txwv qis) | Ntau dua lossis sib npaug rau 358 MPa (ntau dua) |
| Impact Toughness | Tsis yuam | Charpy cuam tshuam lub zog Ntau dua los yog sib npaug rau 40J ntawm -20℃(kom tiv thaiv kom tsis txhob muaj qhov kub thiab txias) |
| Kev soj ntsuam Standards | Hydrostatic test (2 zaug siab) + 100% ultrasonic flaw detection | Hydrostatic test (1.5 lub sij hawm siab) + qhov chaw X-ray soj ntsuam ntawm welds |
| Defect Tolerance | Zero tolerance rau cov kab nrib pleb / tsis muaj fusion (rejection for defects Ntau tshaj los yog sib npaug rau 0.5mm) | Cov teeb meem me me tau tso cai (piv txwv li, porosity Tsawg dua lossis sib npaug li 3.2mm) |
A252 V.S.A242
| Feature | A252 (Welded thiab Seamless Steel Pipes) | A242 (Corten Steel; Atmospheric Corrosion-Resistant Steel) |
|---|---|---|
| Kev siv thawj zaug | Cov yeeb nkab steel piles rau cov txheej txheem hauv paus (xws li piling, caissons). | Weathering steel rau txuas hniav, tsev, thiab sab nraum zoov cov qauv raug rau atmospheric corrosion. |
| Hom khoom | Carbon steel kav. | Tsawg- alloy steel nrog txhim kho atmospheric corrosion kuj. |
| Cov khoom tseem ceeb | - Lub zog siab rau kev thauj khoom -cov kabmob. - Weldability. - Haum rau cov hauv paus tob. |
- Kev tiv thaiv huab cua zoo heev (tsim txheej tiv thaiv xeb). - Cov khoom siv kho tshuab zoo. - Tshem tawm qhov xav tau rau xim hauv qee daim ntawv thov. |
| Corrosion Resistance | General corrosion kuj; tej zaum yuav xav tau txheej txheej ntxiv rau qhov chaw hnyav. | Kev tiv thaiv siab rau atmospheric corrosion vim tooj liab, chromium, thiab nickel alloying ntsiab. |
| Daim ntawv thov | Sib sib zog nqus foundations, marine lug, tuav phab ntsa. | Txuas hniav, kis ncej, sculptures, architectural ntsiab. |
| Mechanical Properties | Tsom ntsoov rau tensile thiab yield zog rau kev txhawb nqa. | Sib npaug lub zog thiab toughness nrog ntxiv corrosion kuj. |
| Nto Zoo | Txheem steel nto; tuaj yeem oxidize yam tsis muaj kev tiv thaiv. | Txhim kho qhov ruaj khov, tiv thaiv xeb-zoo li lub sijhawm dhau los. |
| Tus nqi cuam tshuam | Feem ntau tus nqi qis dua vim tus qauv carbon steel muaj pes tsawg leeg. | Tus nqi pib siab dua vim yog cov khoom siv alloying, tab sis yuav txo tau ntev - cov nqi tu lub sij hawm. |
A252 GR2 Steel Piling yeeb nkab siv
A252 GR2 steel yeeb nkab pawg yog ib hom steel yeeb nkab tshwj xeeb tsim los rau cov txheej txheem pawg hauv paus kev siv, ua haujlwm rau ntau lub hom phiaj tseem ceeb. Hauv qab no yog qee qhov ntawm nws qhov kev thov tseem ceeb scenarios:
Kev Pabcuam Hauv Tsev Hauv Tsev:
Hauv cov haujlwm loj -scale engineering xws li siab- cov tsev nce siab, txuas hniav, thiab txoj kev siab, A252 GR2 steel yeeb nkab pawg tau siv los ua cov txheej txheem sib sib zog nqus.
Lawv tuaj yeem nkag mus tob rau hauv av, muab kev txhawb nqa ruaj khov rau cov tsev thiab ua kom lawv muaj kev nyab xeeb thiab ruaj khov.
Dej hiav txwv Engineering:
Nyob rau hauv dej hiav txwv engineering tej yaam num xws li offshore platforms, docks, thiab breakwaters, A252 GR2 steel yeeb nkab pawg yog dav ua hauj lwm vim lawv zoo heev corrosion kuj thiab lub zog.
Lawv tuaj yeem tiv taus qhov hnyav ntawm ib puag ncig marine, xws li tshuaj tsuag ntsev thiab yoj cuam tshuam, muab kev txhawb nqa zoo rau dej hiav txwv engineering tej yaam num.
Pile Foundation Kev Tsim Kho:
A252 GR2 steel yeeb nkab pawg feem ntau yog siv rau hauv pawg hauv paus kev tsim kho raws li pawg ncej cov ntaub ntawv uas tau tsav mus rau hauv av.
Lawv tuaj yeem tsim kev sib txhuam zoo nrog cov av, txhim kho cov load-cov kabmob muaj peev xwm ntawm pawg hauv paus thiab ua kom ruaj khov ntawm cov tsev.
Kev them nyiaj yug ib ntus:
Hauv qee lub tsev ib ntus lossis cov haujlwm engineering, xws li cov theem ib ntus thiab cov chaw ua yeeb yam, A252 GR2 steel yeeb nkab pawg kuj tau siv los ua cov qauv kev txhawb nqa.
Lawv yooj yim rau nruab thiab tshem tawm, muab kev txhawb nqa ruaj khov rau cov qauv ib ntus.
Geological Kev Tiv Thaiv Kab Mob:
Hauv cov cheeb tsam uas muaj kev puas tsuaj rau geological, xws li av qeeg thiab av nkos, A252 GR2 steel yeeb nkab pawg tuaj yeem siv los tsim cov qauv kev tiv thaiv, xws li tiv thaiv - pawg swb thiab tuav cov phab ntsa.
Lawv tuaj yeem tiv thaiv kev puas tsuaj ntawm geological kev puas tsuaj, tiv thaiv tib neeg lub neej thiab khoom.
