Lub zog ntawm Ob Chav Welded Yeeb Nkab hauv Kev Siv Hluav Taws Xob

Lub zog ntawm ob chav welded yeeb nkab nyob rau hauv kev lag luam kev siv Featured duab

Lus piav qhia luv luv:

Nyob rau hauv lub ntiaj teb no ntawm kev lag luam piping, kev xaiv cov khoom siv thiab kev tsim kho yuav muaj feem cuam tshuam rau tag nrho cov kev ua tau zoo thiab lub neej ntev ntawm lub system. Ib txoj kev uas yog nrov rau nws lub zog thiab durability yog siv ob-welded yeeb nkab. Cov kav dej no tau tsim los tiv thaiv kev kub ntxhov, huab cua kub thiab hnyav ib puag ncig, ua rau lawv zoo tagnrho rau ntau yam kev lag luam.

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Ob chav welded kavyog tsim los nrog ob txoj kev ywj pheej welds los tsim ib qho kev sib txuas ruaj khov thiab txhim khu kev qha ntawm cov yeeb nkab seem. Qhov txheej txheem vuam ob zaug no ua kom ntseeg tau tias cov yeeb nkab tuaj yeem tiv taus cov kev ntxhov siab thiab cov kab mob uas yuav raug ntsib thaum lub sijhawm ua haujlwm, ua rau nws muaj kev ntseeg siab rau cov ntawv thov tseem ceeb uas tsis yog qhov kev xaiv.

Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm ob lub welded kav yog lawv lub peev xwm los tswj cov kev kub ntxhov ib puag ncig. Ob chav vuam txheej txheem tsim ib qho seamless thiab muaj zog kev sib txuas ntawm cov yeeb nkab seem, kom ntseeg tau tias lawv tuaj yeem tiv thaiv sab hauv tsis muaj kev pheej hmoo ntawm kev xau lossis tsis ua haujlwm. Qhov no ua rau lawv zoo tagnrho rau cov ntawv thov xws li cov kav dej thiab cov roj av, qhov chaw uas muaj kev ncaj ncees ntawm cov kav dej yog qhov tseem ceeb rau kev nyab xeeb thiab kev ua haujlwm zoo.

Table 2 Lub cev thiab tshuaj lom neeg cov khoom ntawm cov kav hlau (GB / T3091-2008, GB / T9711-2011 thiab API Spec 5L)

Txuj

Qib Steel

Chemical Constituent (%)

Tensile Khoom

Charpy(V notch) 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 Nws

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 Nws

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/T9711-2011 (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 qho ntawm qhov toughness Performance index ntawm qhov cuam tshuam lub zog thiab shearing cheeb tsam yuav 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

435

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 ua ke, thiab Nb + V + Ti ≤ 0.15%

172

310

(L0 = 50.8mm) yuav tsum 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 qho tib si ntawm qhov cuam tshuam lub zog thiab qhov chaw shearing yuav tsum tau ua raws li cov txheej txheem 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

Ntxiv rau nws lub zog, ob chav welded yeeb nkab kuj tuaj yeem tiv taus qhov kub thiab txias, ua rau nws tsim nyog rau ntau yam kev lag luam. Txawm hais tias thauj cov kua dej kub los yog cov pa roj, lossis kev ua haujlwm hauv ib puag ncig uas muaj qhov kub thiab txias, ob chav welded yeeb nkab tswj nws cov qauv kev ncaj ncees thiab kev ua tau zoo, ua kom ntseeg tau kev ua haujlwm zoo nyob rau hauv txawm tias qhov nyuaj tshaj plaws.

Tsis tas li ntawd, lub durability ntawm ob chav welded yeeb nkab ua rau nws tus nqi-zoo xaiv rau kev lag luam siv. Lawv muaj peev xwm tiv taus hnav, corrosion thiab lwm yam kev degradation txhais tau hais tias lawv xav tau kev saib xyuas thiab hloov me me, txo cov nqi khiav lag luam thiab kev poob qis.

Zuag qhia tag nrho, kev siv ob chav welded yeeb nkab muab ntau yam txiaj ntsig rau kev siv hauv kev lag luam, suav nrog lub zog, kav ntev thiab kev ntseeg tau. Lawv lub peev xwm los tswj kev kub ntxhov, huab cua kub thiab hnyav ib puag ncig ua rau lawv zoo tagnrho rau ntau yam kev lag luam los ntawm roj thiab roj rau kev ua tshuaj. Nrog nws cov ntaub ntawv pov thawj kev ua tau zoo thiab kev pabcuam lub neej, ob chav welded yeeb nkab yog ib qho khoom muaj nqis rau txhua qhov kev lag luam piping.