ASTM A252 Qib 1 Kauv Welded Steel Pipe (SSAW)
Lub ntsiab lus tseem ceeb
ASTM A252 Qib 1 Kauv Submerged Arc Welded (SSAW) steel yeeb nkabyog qhov nkag- qib qib rau cov yeeb nkab steel siv hauv kev siv hauv paus thiab cov qauv siv. Nws yog tsim tshwj xeeb raulub teeb -load foundation pilingqhov twg qib qis zog txaus txaus. Tsis zoo li cov kav dej siab (piv txwv li, ASTM A53), cov kav dej no ua haujlwm ruaj khov- nqa cov tswv cuab lossis ua lub plhaub rau cam khwb cia- hauv - qhov chaw ua vaj tse .
Lub npe piav qhia
| Ib feem | Lub ntsiab lus |
|---|---|
| ASTM | ASTM International (American Society for Testing and Materials) |
| A252 | Standard specification rau welded thiab seamless steel yeeb nkab pawg |
| Qib 1 | Qib qis zog qis tshaj - qhov tsawg kawg nkaus tawm lub zog ntawm30,000 psi (205 MPa) |
| SSAW | Kauv Submerged Arc Vuam - ob npaug -sab vuam nrog muab tub lim hlau; weld seam khiav tsis tu ncua nyob rau hauv ib tug kauv raws cov yeeb nkab ntev |
Ntsiab Specifications
| Yam ntxwv | Kev piav qhia |
|---|---|
| Txuj | ASTM A252 / A252M - "Standard Specification rau Welded thiab Seamless Steel Pipes" [citation: 5, citation: 6] |
| Lub luag haujlwm tseem ceeb | Kev txhawb nqa kev tsim qauv- tsis yog rau cov kua dej ntim |
| Kev tsim khoom | Spiral Submerged Arc Vuam (SSAW) - ob npaug -sab tsis siv neeg vuam |
| Yam tsawg kawg nkaus Yield Strength | 205 MPa (30,000 psi)[Citation: 1, Citation: 6] |
| Yam tsawg kawg Tensile Strength | 345 MPa (50,000 psi)[Citation: 1, Citation: 6] |
| Tsawg kawg Elongation | 30%(rau phab ntsa thickness Ntau dua los yog sib npaug rau 7.9mm) |
| Size Range (SSAW) | 219mm txog 3000mm(8 "mus rau 118") OD - txog li 4000 hli muaj [citation: 1, citation: 7] |
| Phab ntsa Thickness | 3.2mm txog 60mm(ntau ntau 6-25.4 mm) [citation: 1, citation: 7] |
| Ntev | 6 m rau 32 m txheem; kev cai ntev muaj [citation:2, citation:7] |
| Xaus Xaus | Plain kawg (PE) tus qauv; beveled xaus rau teb welding |
Tshuaj muaj pes tsawg leeg
ASTM A252 qhia tshwj xeeb tshaj yog txwv rau phosphorus. Tag nrho peb qib sib koom tib yam kev txwv [citation:2, citation:6]:
| Element | Ntau tshaj % |
|---|---|
| Cov pa roj carbon (C) | 0.26% (tus qauv, tsis muaj cai) |
| Manganese (Mn) | 1.60% (tseem, tsis muaj cai) |
| Silicon (Si) | 0.45% (tus qauv, tsis muaj cai) |
| Phosphorus (P) | 0.050%(yuav tsum tau) |
| Sulfur (S) | 0.030% (tus nqi) |
Lus Cim: Tus qauv tsom mus rau cov khoom siv kho tshuab es tsis yog cov tshuaj lom neeg muaj pes tsawg leeg. Cov hlau yuav tsum tsis pub ntau tshaj 0.050% phosphorus [citation: 2, citation: 6].
Mechanical Properties Sib piv
| Qib | Yield zog (min) | Tensile zog (min) | Elongation (min) | Lub zog vs. Qib 1 |
|---|---|---|---|---|
| Qib 1 | 205 MPa (30,000 psi) | 345 MPa (50,000 psi) | 30% | Lub hauv paus |
| Qib 2 | 240 MPa (35,000 psi) | 415 MPa (60,000 psi) | 25% | +17% tawm |
| Qib 3 | 310 MPa (45,000 psi) | 455 MPa (66,000 psi) | 20% | +51% tawm |
Source: [citation: 1, citation: 6]
Dimensional Tolerances
| Parameter | Ua siab ntev |
|---|---|
| Sab nraud txoj kab uas hla (OD Tsawg dua los yog sib npaug rau 508mm) | ± 1% lossis ± 1.0mm (qhov twg ntau dua) |
| Sab nraud txoj kab uas hla (OD> 508mm) | ± 1% lossis ± 4.0mm (qhov twg ntau dua) |
| Phab ntsa Thickness | +15% / -12.5% ntawm nominal |
| Qhov hnyav | +15% / -5% ntawm qhov hnyav theoretical |
| Kev ncaj | Tsawg dua lossis sib npaug li 0.1% ntawm tag nrho qhov ntev |
Hom Loj Muaj:
| OD (inch) | OD (mm) | Phab ntsa Thickness Range (mm) |
|---|---|---|
| 16" | 406 | 6.0 - 14.0 |
| 20" | 508 | 6.0 - 16.0 |
| 24" | 610 | 6.0 - 18.0 |
| 30" | 762 | 7.0 - 21.0 |
| 36" | 914 | 8.0 - 24.0 |
| 40" | 1016 | 8.0 - 26.0 |
| 48" | 1219 | 9.0 - 28.0 |
| 56" | 1422 | 10.0 - 29.0 |
| 60" | 1524 | 10.0 - 29.0 |
| 64" | 1626 | 10.0 - 30.0 |
| 72" | 1829 | 10.0 - 30.0 |
SSAW Manufacturing txheej txheem
Kauv welded kav hauv qab ASTM A252 yog tsim los siv cov txheej txheem hauv qab no:
| Kauj ruam | Kev piav qhia |
|---|---|
| 1. Kev npaj cov khoom nyoos | Steel coils ntsib ASTM A252 qhov yuav tsum tau ua yog qib thiab ntug-milled |
| 2. Ntug Kev Npaj | Cov npoo npoo yog milled rau kev vuam zoo |
| 3. Kauv sib sau | Hlau sawb txuas ntxiv tsim rau hauv cov duab cylindrical ntawm lub kaum ntse ntse tshwj xeeb |
| 4. Submerged Arc Vuam | Ob -sab tsis siv neeg submerged arc vuam(sab hauv thiab sab nraud) tsim cov spiral seam |
| 5. Weld NDT | 100% ultrasonic soj ntsuam ntawm cov vuam seam |
| 6. Kev Ntsuas Hydrostatic | Kev xaiv - tuaj yeem ua raws li kev pom zoo |
| 7. Kev ua tiav tiav | Plain los yog beveled xaus rau welding |
Kev Ntsuas & Kev Ntsuam Xyuas Cov Cai
| Hom kev xeem | Kev xav tau | Sau ntawv |
|---|---|---|
| Tshuaj ntsuam xyuas | Rau qhov kub ntau | Phosphorus txwv txwv |
| Tensile Test | Rau ntau | Txheeb xyuas qhov tawm los thiab lub zog tensile |
| Flattening Test | Yuav tsum tau | Txheeb xyuas qhov ductility thiab weld kev ncaj ncees |
| Khoov Test | Yuav tsum tau- transverse weld specimen khoov yam tsis muaj cracking | Kev ntsuas tseem ceeb rau cov kav dej |
| Hydrostatic Test | Xaiv tau | Tsis tas yuav tsum tau piling kav |
| Ultrasonic soj ntsuam | 100% ntawm weld seam | Standard xyaum rau SSAW |
| Dimensional soj ntsuam | 100% | Raws li ASTM A252 tolerances |
| Mill Test Certificate | EN 10204 Hom 3.1B | Muab tag nrho cov kev xeem |
Daim ntawv thov
Qib 1 yog qhov kev xaiv pheej yig tshaj plaws rau lub teeb -load foundation applications:
| Daim ntawv thov | Kev piav qhia |
|---|---|
| Lub Teeb Txheej Txheem Txheej Txheem | Cov tsev nyob thiab cov tsev lag luam me |
| Cov av zoo | Qhov twg muaj peev xwm tsawg dua lossis sib npaug li 120 kN / m² |
| Ib ntus Shoring | Kev txhawb nqa excavation thiab cov qauv ib ntus |
| Plua plav | Cov pawg uas tsis tas yuav muaj peev xwm thauj khoom siab |
| Cov choj me me | Cov choj tsis muaj kev thauj khoom loj |
| Lub teeb -Lub luag haujlwm Marine Structures | Tsis yog - cov chaw nres nkoj thiab cov piers tseem ceeb |
Qib Qib Kev Qhia
| Qib | Yield zog | Zoo tshaj rau |
|---|---|---|
| Qib 1 | 205 MPa (30 ksi) | Lub teeb-load daim ntawv thov, cov av zoo, cov qauv ib ntus, kev lag luam feem ntau |
| Qib 2 | 240 MPa (35 ksi) | Feem ntau- nruab nrab- cov tsev nce, choj hauv paus, piling dav |
| Qib 3 | 310 MPa (45 ksi) | Hnyav-load daim ntawv thov, txuas hniav loj, cov chaw sab nrauv, thaj tsam seismic |
Qhov zoo ntawm SSAW rau Qib 1 Piling
| Qhov zoo | Kev piav qhia |
|---|---|
| Tus nqi -Cov | Cov kev xaiv pheej yig tshaj plaws rau cov ntawv loj - txoj kab uas hla piling |
| Loj Loj Muaj peev xwm | SSAW tsim cov kav dej los ntawm 8 "mus rau 160" OD - zoo tagnrho rau loj - txoj kab uas hla |
| Ntev ntev | Txog li 32m ntev txo cov kev xav tau ntawm kev sib tshuam |
| High Weld Integrity | 100% UT soj ntsuam ntawm weld seam kom zoo |
| Spiral Stress Distribution | Spiral weld disperses kev ntxhov siab ntau sib npaug thaum tsav tsheb |
| Khoom siv tau zoo | Muaj peev xwm siv txoj hlua khi hlau los tsim cov kav loj - txoj kab uas hla |
Kev txiav txim siab tseem ceeb
1. Qib 1 vs. Qib siab dua
Qib 1yog qhov kev lag luam tshaj plaws tab sis muaj lub zog qis tshaj
Rau feem ntau cov ntawv thov kev ruaj ntseg,Qib 2yog qhov ntau dua thiab pom zoo qib
Rau hnyav-load tej yaam num,Qib 3muab lub zog siab tshaj plaws
2. Tsis tas yuav tsum kuaj Hydrostatic
ASTM A252 ua tau zootsis yogyuav tsum tau kuaj hydrostatic vim hais tias cov kav dej piling tau ntim nrog cov pob zeb thiab tsis siv rau kev xa dej
Qhov no txawv ntawm cov qauv yeeb nkab siab xws li API 5L lossis ASTM A53
3. Khoov Test yog qhov tseem ceeb
Kev ntsuas khoov yog qhov yuav tsum tau ua rau cov kav dej sib txuas thiab ncaj qha txheeb xyuas qhov vuam qhov ductility hauv kev khoov kev ntxhov siab zoo ib yam li cov khoom siv thaum lub sijhawm teeb tsa.
4. Kev tiv thaiv corrosion
Rau cov qauv mus tas li, qhia cov txheej txheem tsim nyog raws li ib puag ncig:
FBE/3 LPE: Rau faus pawg thiab hnyav ib puag ncig
Coal Tar Epoxy: Rau kev siv marine
Galvanized: Rau saum- daim ntawv thov hauv av
5. Xaus tiav
Plain xaus (PE)- tus qauv rau lub pob tw - vuam
Beveled xaus (BE)- rau thaj chaw vuam (30℃bevel)
Tsav khau / pawg lus qhia- xaiv tau rau kev tsav tsheb nyuaj
6. Cov Lus Qhia Ntxiv
ASTM A252 suav nrog cov kev xav tau ntxiv uas tuaj yeem teev tseg rau cov ntawv thov tseem ceeb:
S1: Charpy V-Notch Impact Test (rau qis- daim ntawv thov kub)
S2: Poob-Qhov Ntsuas Ntsuas Ntsuas Ntsuas Ntsuas Ntsuas Ntsuas Ntsuas Ntsuas
7. Thib peb-Kev soj ntsuam tog
Muaj cov kev pabcuam tshuaj xyuas suav nrog SGS, BV, Lloyds
Cov ntsiab lus
ASTM A252 Qib 1 Kauv Submerged Arc Welded (SSAW) steel yeeb nkabyog qhov nkag - theem specification rau loj - txoj kab uas hla steel yeeb nkab piles siv nyob rau hauv lub hauv paus tsim. Nrog yam tsawg kawg nkaus tawm lub zog ntawm30,000 psi (205 MPa)thiab tensile zog ntawm50,000 psi (345 MPa), Qib 1 yog qhov kev xaiv pheej yig tshaj plaws, haum rau lub teeb -load daim ntaub ntawv, cov av zoo, thiab cov qauv ib ntus.
Cov yam ntxwv tseem ceeb:
Khoom txheem: ASTM A252 Qib 1 - nkag - qib zog qib rau piling
Yield zog205 MPa (30,000 psi) yam tsawg kawg nkaus - lub hauv paus rau qib A252
Elongation: 30% yam tsawg kawg nkaus - zoo ductility rau installation
SSAW manufacturingtsim cov kav dej los ntawm8" rau 160" ODnrog phab ntsa thickness mus txog60 mm
Ob -sab vuamtsim ib lub siab -zoo weld nugget
100% ultrasonic kuajntawm weld seam kom zoo
Khoov xeem yuav tsum tau- qhov tseem ceeb rau kev siv piling
Tsis tas yuav kuaj hydrostatic- Cov kav dej tau ntim nrog pob zeb, tsis siv rau kev xa tawm cov kua
Kev xaiv nyiaj txiag tshaj plawsntawm ASTM A252 qib
Cov ntawv thov uas muaj xws li:
Lub teeb structural foundations rau cov tsev nyob / lag luam
Kev them nyiaj yug ib ntus shoring thiab excavation
Plua plav hauv cov av zoo
Cov choj me me thiab lub teeb -cov dej num hauv hiav txwv
Thaum ordering, qhia:ASTM A252 Qib 1, SSAW (Spiral Submerged Arc Welded), Qhov Loj (OD x WT), Ntev, Qhov Kawg Finish (plain / beveled), Cov Txheej Txheem Txheej Txheem (yog xav tau), thiab Daim Ntawv Pov Thawj Zeb Xeem rau EN 10204 Hom 3.1B. Rau feem ntau cov ntawv thov hauv paus xav tau lub zog ntau dua,Qib 2yog qhov ntau dua thiab pom zoo qib.
