Dab tsi yog A252 Pipe
ASTM A252 yeeb nkab qib yog covnominal standard specification rau ob leeg seam thiab tsawg raws li welded steel yeeb nkab pawg. Cov kav dej feem ntau tau muab faib ua peb qib-1, 2, thiab 3. Ntawm peb qhov no, ASTM A252 Qib 3 yog suav tias yog siv ntau tshaj.
A252 Pipe Pile specification
| Txuj | ASTM A252, ASTM A252 |
| Qib Steel | Qib 1 |
| Qib 2 | |
| Qib 3 | |
| Diamensions | 6" – 56" |
| 168.3mm - 1422mm | |
| DN150-DN1400 | |
| Thickness | 0.134"- 1" |
| 3.40mm-25.4 hli | |
| Unit Length | R1 (4.88m – 7.62m) |
| R2(7.62m – 10.67m) | |
| Uniform Length | |
| Cov yeeb nkab kawg | Plain, Bevelled |
ASTM A252 Tshuaj & Mechanical Properties
| Lub ntsiab | Qib 1 (%) | Qib 2 (%) | Qib 3 (%) |
|---|---|---|---|
| Cov pa roj carbon (C) | 0.26 max | 0.26 max | 0.26 max |
| Manganese (Mn) | 0.95 max | 1.60 max | 1.60 max |
| Phosphorus (P) | 0.050 max | 0.050 max | 0.050 max |
| Khoom | Qib 1 | Qib 2 | Qib 3 |
|---|---|---|---|
| Tensile zog (psi) | 50,000 min | 60,000 min | 66,000 min |
| Yield zog (psi) | 30,000 min | 35,000 min | 45,000 min |
| Elongation (%) | 18% min | 14% min | 12% min |
Dab tsi yog qhov txawv ntawm ASTM A252 Qib 1, Qib 2 thiab Qib 3?
| Parameter | GR 1 | GR 2 | GR 3 |
|---|---|---|---|
| Yield zog | Ntau dua lossis sib npaug rau 207 MPa (30 ksi) | Ntau dua lossis sib npaug rau 241 MPa (35 ksi) | Ntau dua lossis sib npaug rau 345 MPa (50 ksi) |
| Tensile zog | Ntau dua lossis sib npaug rau 345 MPa (50 ksi) | Ntau dua lossis sib npaug rau 414 MPa (60 ksi) | Ntau dua lossis sib npaug rau 483 MPa (70 ksi) |
| Daim Ntawv Thov Scope | Ib ntus shoring pawg Tsis yog- cov qauv tseem ceeb |
Cov hauv paus tsev mus tas li Standard yeeb nkab piles |
Heavy infrastructure Offshore platforms Seismic-cov pov thawj tiv taus |
| Impact Test | Tsis xav tau | Xaiv tau (qhov project- tshwj xeeb) | Yuav tsum tau Charpy V-notch ntawm -45 degree |
| Av Adaptability | Mos mus rau nruab nrab av | Nruab nrab- cov av ntom ntom | Cov av ntom ntom / pob zeb High -ib puag ncig corrosion |
| Nqi Efficiency | qis tshaj | Nruab nrab | Siab tshaj (hmoov rau cov khoom tseem ceeb) |
Dab tsi yog qhov txawv ntawm ASTM A106 thiab A252?
| Parameter | ASTM A106 Seamless Carbon Yeeb Nkab rau High -Temp) | ASTM A252 (welded steel yeeb nkab) |
|---|---|---|
| Kev tswj hwm tus qauv | ASTM A106 / A106M-19a Cov Lus Qhia | ASTM A252 / A252M-22 |
| Kev tsim khoom | Kub-rolled/Cold- kos seamless yeeb nkab | Longitudinal / Kauv welded yeeb nkab (SAW / EFW) |
| Qib | A, B, C (nce carbon ntsiab lus) | GR1, GR2, GR3 (nce zog) |
| Yield zog | Qib A: Ntau dua lossis sib npaug ntawm 205 MPa Qib B: Ntau dua lossis sib npaug li 240 MPa Qib C: Ntau dua lossis sib npaug ntawm 275 MPa |
GR1: Ntau dua lossis sib npaug rau 207 MPa GR2: Ntau dua lossis sib npaug rau 241 MPa GR3: Ntau dua lossis sib npaug rau 345 MPa |
| Temp. Ntau yam | -29℃rau 650 degree(zoo tshaj -temp kev ua haujlwm) | -45℃rau 100 degree(nruab qis -temp cuam tshuam) |
| Cov ntawv thov tseem ceeb | Siab -T/P piping systems: ✅ Boiler tubes ✅ Kub exchangers ✅ Refinery txheej txheem kav |
Foundation txhawb: ✅ Tsev pawg (GR3 nrog Q235B connectors) ✅ Offshore cua tsho (GR3 tiv thaiv nthwv dej) ✅ Choj piers (GR2 nqi-zoo) |
| Impact Toughness | Qib B / C xav tau -29℃Charpy xeem | GR3 mandates -45℃Charpy xeem |
| Corrosion Control | Sab nraud rwb thaiv tsev / sab hauv hauv ob sab phlu (anti{0}}oxidation) | Epoxy txheej + cathodic tiv thaiv (av / dej hiav txwv) |
| Txuas rau Cov Ntsiab Lus Ua Ntej | Replaces Q235B in high-temp pipes (>400 degree) | Synergy nrog Q235B connectors(piv txwv li, pawg khi rods) |
| Tus nqi Benchmark | Qib B: $1,200/ton ({2}}% vs. A252 GR3) | GR3: $ 900 / ton (vuam txo nqi) |
ASTM A252 Yeeb Nkab Loj
| Nominal Yeeb Nkab Loj |
Sab nraum Txoj kab uas hla (mm) |
Qhov Loj | ||||||||||||||||||
| NPS | OD | |||||||||||||||||||
| 6 | 152.4 | 3.40 | 3.58 | 3.96 | 4.17 | 4.37 | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 8 | 203.2 | 3.58 | 4.37 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 8 5/8 | 219.1 | 2.77 | 3.58 | 4.37 | 4.78 | 5.16 | 5.56 | 6.35 | 7.04 | 7.92 | 8.18 | 8.74 | 9.53 | 11.13 | 12.7 | – | – | – | – | – |
| 10 | 254.0 | 2.77 | 3.05 | 3.4 | 3.58 | 3.81 | 4.17 | 4.37 | 4.55 | 4.78 | 5.16 | 5.56 | 5.84 | 6.35 | – | – | – | – | – | – |
| 10 3/4 | 273.1 | 2.77 | 3.05 | 3.4 | 3.58 | 3.81 | 4.17 | 4.37 | 4.55 | 4.78 | 5.16 | 5.56 | 5.84 | 6.35 | 7.09 | 7.8 | 8.74 | 9.27 | 11.13 | 12.7 |
| 12 | 304.8 | 3.40 | 3.58 | 3.81 | 4.17 | 4.37 | 4.55 | 4.78 | 5.16 | 5.56 | 5.84 | 6.35 | 7.14 | 7.92 | – | – | – | – | – | – |
| 12 3/4 | 323.9 | 2.77 | 3.40 | 3.58 | 3.81 | 4.17 | 4.37 | 4.55 | 4.78 | 5.16 | 5.56 | 5.84 | 6.35 | 7.14 | 7.93 | 8.38 | 8.74 | 9.53 | 11.13 | 12.7 |
| 14 | 355.6 | 3.40 | 3.58 | 3.81 | 4.17 | 4.37 | 4.55 | 4.78 | 5.16 | 5.56 | 5.84 | 6.35 | 7.14 | 7.93 | 8.87 | 9.53 | 11.13 | 11.91 | 12.7 | – |
| 16 | 406.4 | 3.40 | 3.58 | 3.81 | 4.17 | 4.37 | 4.55 | 4.78 | 5.16 | 5.56 | 5.84 | 6.35 | 7.14 | 7.93 | 8.87 | 9.53 | 11.13 | 11.91 | 12.7 | – |
| 18 | 457.2 | 3.58 | 4.37 | 4.78 | 5.56 | 5.84 | 6.35 | 7.14 | 7.93 | 8.74 | 9.53 | 11.13 | 11.91 | 12.7 | – | – | – | – | – | – |
| 20 | 508.0 | 3.58 | 4.37 | 4.78 | 5.56 | 6.35 | 7.14 | 7.93 | 8.87 | 9.53 | 11.13 | 11.91 | 12.7 | – | – | – | – | – | – | – |
| 22 | 558.8 | 4.37 | 4.78 | 5.56 | 6.35 | 7.14 | 7.93 | 9.53 | 11.13 | 11.91 | 12.70 | – | – | – | – | – | – | – | – | – |
| 24 | 609.6 | 4.37 | 4.78 | 5.56 | 6.35 | 7.14 | 7.93 | 9.53 | 11.13 | 11.91 | 12.70 | – | – | – | – | – | – | – | – | – |
Core Application Areas
Kev tsim kho Foundation Engineering
GR 1: Cov pob zeb hauv av ntiav rau cov qauv me me (cov av nplaum tawv tawv, cov kabmob muaj peev xwm tsawg dua lossis sib npaug li 120 kN / m² →static load ntsiab lus)
GR 2: Kev sib txhuam pawg rau siab - cov tsev nce siab (cov av xuab zeb, xav tau Q235B connectors →continuation ntawm pawg synergy tsim)
GR 3: Pob zeb-socketed pawg rau super siab- nce siab (pob zeb anchorage, tawm los Ntau dua lossis sib npaug rau 345 MPa rau kev tiv thaiv shear)
Tsheb thauj mus los Infrastructure
GR 2: Txoj kev loj choj piers / abutments (ib puag ncig corrosion, nrog Class 2 corrosion tiv thaiv ib A252)
GR 3:
Pawg pawg rau hla- hiav txwv txuas hniav(high- dej hiav txwv corrosion + soft silt →tus neeg siv- txhais tias "ib puag ncig nyuaj")
High -Speed rail viaduct foundations(Kev qaug zog ua haujlwm Ntau dua lossis sib npaug rau 1 lab lub voj voog →dynamic load yuav tsum ua raws li Q235B logic)
Hluav taws xob & Industrial Facilities
GR 3:
Offshore cua turbine tsho foundations(yield 345 MPa resists yoj cuam tshuam →siab -load scenario)
Anti- pawg ntab rau LNG tso tsheb hlau luam(-45℃cuam tshuam toughness →vs. Q235B's -20℃txwv)
GR 2: Cov yeeb nkab khib txhawb nqa hauv cov nroj tsuag petrochemical (cov av nruab nrab, 20% kev txuag nqi vs. GR3)
Water Conservancy & Port Engineering
GR 1: Riverbank revetment pawg (tsawg-corrosion dej tshiab)
GR 3:
Daim ntawv phab ntsa rau qhov tob -dej wharves(GR3 lub ntsiab pawg + Q235B khi pas nrig →cov khoom siv sib koom ua piv txwv)
Wave- cov qauv tawg rau cov dej tawg(yuav tsum tau epoxy txheej + cathodic tiv thaiv dej hiav txwv corrosion)
Yuav tsum tau xeem
Tshuaj ntsuam xyuas, Mechanical Test, Visusal Inspection, Tension Test, Dimension Check
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