Cov txiaj ntsig ntawm A252 Qib 3 Cov kav hlau siv hauv cov kav dej phwj thiab roj av kev tsim kho

Cov txiaj ntsig ntawm A252 Qib 3 Cov kav hlau siv hauv cov kav dej phwj thiab roj av siv cov yeeb yaj kiab tshwj xeeb

Lus piav qhia luv luv:

A252 Qib 3 steel yeeb nkab, tseem hu uakauv submerged arc yeeb nkab, yog ib qho kev xaiv nrov rau kev tsim cov kav dej thiab cov kav dej.Cov kav dej no tau tsim los tiv thaiv cov xwm txheej hnyav thiab muaj ntau yam zoo hauv cov ntawv thov no.

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Ib qho ntawm cov txiaj ntsig tseem ceeb ntawmA252 Qib 3 steel yeeb nkab yog nws lub zog tshwj xeeb thiab durability.Cov kav dej no yog ua los ntawm cov hlau zoo thiab muaj zog tiv taus corrosion, hnav thiab cuam tshuam.Qhov no ua rau lawv zoo tagnrho rau siv hauv cov kav dej phwj tuaj uas lawv tuaj yeem raug cov khoom corrosive thiab hnyav hnyav.Tsis tas li ntawd, lawv lub zog thiab kev ua haujlwm ntev ua rau lawv tsim nyog siv rau hauv kev tsim cov roj pipeline, vim lawv yuav tsum tiv taus kev kub ntxhov thiab hloov ib puag ncig.

Txuj

Qib Steel

Chemical Constituent (%)

Tensile Khoom

Charpy(V)

Impact Test

Lwm yam

Yield zog(Mpa)

Tensile zog(Mpa)

(L0 = 5.65 √ S0)min Stretch Rate (%)

max

min

max

min

max

D ≤ 168.33mm

D ＞ 168.3mm

GB/T3091-2008

qw 215a

≤ 0.15

0.25—1.20 Nws

0.045 ib

0.050 ib

0.35 Nws

Ntxiv NbVTi raws li GB/T1591-94

215

335

> 31

q215 ib

≤ 0.15

0.25-0.55 Nws

0.045 ib

0.035 ib

215

335

> 31

qw 235a

≤ 0.22

0.30 — 0.65 Nws

0.045 ib

0.050 ib

0.035 ib

235

375

> 26

q235 ib

≤ 0.20

0.30 ≤ 1.80

0.045 ib

0.035 ib

235

375

> 26

qw 295a

0.16

0.80-1.50 Nws

0.045 ib

0.55 ib

295

390

> 23

q295 ib

0.16

0.80-1.50 Nws

0.045 ib

0.040 ib

0.55 ib

295

390

> 23

qw 345a

0.20 ib

1.00-1.60 Nws

0.045 ib

0.55 ib

345

510

> 21

q345 ib

0.20 ib

1.00-1.60 Nws

0.045 ib

0.040 ib

0.55 ib

345

510

> 21

GB/

T9711-

Xyoo 2011

(PSL1)

l175 ua

0.21 ib

0.60 ib

0.030 Nws

Kev xaiv ntxiv ib qho ntawm NbVTi cov ntsiab lus lossis ib qho kev sib xyaw ua ke ntawm lawv

175

310

Ib los yog ob ntawm cov toughness indexof

Kev cuam tshuam lub zog thiab qhov chaw shearing tuaj yeem raug xaiv.Rau

L555, saib tus qauv.

L210

0.22

0.90 ib

0.030 Nws

210

335

l245 ua

0.26

1.20

0.030 Nws

245

415

l290 ua

0.26

1.30 Nws

0.030 Nws

290

415

l320 ua

0.26

1.40 Nws

0.030 Nws

320

4 35

l360 ua

0.26

1.40 Nws

0.030 Nws

360

460

l390 ua

0.26

1.40 Nws

0.030 Nws

390

l415 ua

0.26

1.40 Nws

0.030 Nws

415

520

l450 ua

0.26

1.45 Nws

0.030 Nws

450

535 ib

l485 ua

0.26

1.65 ib

0.030 Nws

485 ib

570 ib

API 5L (PSL 1)

A25

0.21 ib

0.60 ib

0.030 Nws

Rau qib B steel,

Nb + V ≤ 0.03%;

rau steel ≥ qib B, xaiv tau ntxiv Nb lossis V lossis lawv

Kev sib xyaw ua ke, thiab Nb + V + Ti ≤ 0.15%

172

310

(L0 = 50.8mm) ua

xam raws li cov qauv hauv qab no:

e=1944·A0 .2/U0 .0

A: Thaj tsam ntawm cov qauv hauv mm2 U: Tsawg kawg tensile zog hauv Mpa

Tsis muaj los yog ib qho

los yog ob leeg ntawm

qhov cuam tshuam

zog thiab

kev txiav

cheeb tsam yuav tsum tau raws li cov qauv toughness.

0.22

0.90 ib

0.030 Nws

207

331

0.26

1.20

0.030 Nws

241

414 ib

X42

0.26

1.30 Nws

0.030 Nws

290

414 ib

X46

0.26

1.40 Nws

0.030 Nws

317

434 ib

X52

0.26

1.40 Nws

0.030 Nws

359 ib

455

X56

0.26

1.40 Nws

0.030 Nws

ib 386

490 ib

X 60

0.26

1.40 Nws

0.030 Nws

414 ib

517 ib

X 65

0.26

1.45 Nws

0.030 Nws

448 ib

531 ib

X 70

0.26

1.65 ib

0.030 Nws

483 ib

565 ib

Lwm qhov kom zoo dua ntawm A252 Qib 3 steel yeeb nkab yog nws cov versatility.Cov kav dej no muaj nyob rau hauv ntau qhov ntau thiab tsawg thiab tuab, ua rau lawv haum rau ntau yam kev siv.Txawm tsim ib lub me mekab kav dejlos yog cov kav dej loj loj, A252 Qib 3 steel yeeb nkab tuaj yeem hloov kho tau yooj yim kom tau raws li qhov yuav tsum tau ua.Tsis tas li ntawd, cov kav dej no tuaj yeem ua rau hauvhollow-section structural kav, ntxiv nthuav lawv siv nyob rau hauv kev tsim kho tej yaam num.

Ntxiv rau nws lub zog thiab kev ua tau zoo, A252 Qib 3 steel yeeb nkab kuj paub txog nws cov txiaj ntsig zoo.Cov kav dej no kuj yooj yim rau nruab thiab xav tau kev saib xyuas tsawg, txo cov nqi tag nrho.Tsis tas li ntawd, lawv lub neej ua haujlwm ntev thiab kev tiv thaiv corrosion ua kom lawv muaj zog rov qab los ntawm kev nqis peev rau cov kav dej phwj tuaj thiabcev oil kabkev tsim kho tej yaam num.

Lwm qhov txiaj ntsig tseem ceeb ntawm A252 Qib 3 steel yeeb nkab yog nws txoj kev sib raug zoo nrog ntau yam kev tsim kho.Cov kav dej no tuaj yeem ntsia tau siv cov txheej txheem excavation los yog cov txheej txheem trenchless xws li kab rov tav directional drilling, yeeb nkab jacking lossis micro-tunneling.Qhov kev hloov pauv no tso cai rau kev txhim kho kom tau txais txiaj ntsig zoo thiab muaj txiaj ntsig hauv ntau qhov chaw nyuaj, suav nrog thaj chaw hauv nroog, txoj kev hauv dej thiab thaj chaw rhiab heev.

Zuag qhia tag nrho, A252 Qib 3 steel yeeb nkab muaj ntau yam zoo rau kev tsim cov kav dej thiab roj av.Lawv lub zog, durability, versatility thiab nqi-zoo ua rau lawv zoo tagnrho rau cov kev thov no.Txawm hais tias siv hauv cov kav dej lossis cov kav dej siv roj, cov kav dej no muab kev ua tau zoo thiab muaj txiaj ntsig ntev.Raws li qhov tshwm sim, lawv tseem yog qhov kev daws teeb meem ntawm kev xaiv rau engineers thiab cov neeg cog lus nrhiav cov kav dej ruaj khov thiab txhim khu kev qha.

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