Hollow-Section Structural Pipes Rau Underground Natural Gas Lines

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Thaum tsim cov raj xa hluav taws xob hauv av, kev xaiv cov khoom siv yog qhov tseem ceeb rau kev ua kom muaj kev nyab xeeb thiab kev ua haujlwm zoo ntawm cov txheej txheem.Hollow seem structural raj, tshwj xeeb tshaj yog muab kauv submerged arc tubes, yog nrov zuj zus vim lawv superior zog, durability thiab corrosion kuj.Hauv blog no, peb yuav tshawb txog qhov tseem ceeb ntawm hollow-seem structural kav nyob rau hauv kev tsim kho ntawm underground natural gas pipelines thiab qhov tseem ceeb zoo uas lawv muaj.

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Kauv submerged arccevsyog dav siv nyob rau hauv kev tsim kho ntawm underground natural gas kab vim lawv cov txheej txheem tsim tshwj xeeb.Cov kav dej yog tsim los ntawm kev tsim cov coils ntawm cov hlau kub-kuav los tiag rau hauv cov duab kauv thiab tom qab ntawd welding lawv siv cov txheej txheem submerged arc vuam.Qhov no ua rau lub zog siab Spiral submerged arc kav nrog cov tuab tuab thiab qhov tseeb qhov tseeb, ua rau lawv zoo tagnrho rau kev thauj mus los hauv av.

Table 2 Lub Cev Lub Cev thiab Cov Khoom Siv Hluav Taws Xob ntawm Cov Hlau 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 ib

0.35 Nws

Ntxiv Nb\V\Ti 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/T9711-2011 (PSL1)

l175 ua

0.21 ib

0.60 ib

0.030 Nws

Kev xaiv ntxiv ib qho ntawm Nb\V\Ti cov ntsiab lus lossis ib qho kev sib xyaw ua ke ntawm lawv

175

310

Ib lossis ob 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

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 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

Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm cov kav dej hollow-section yog lawv cov corrosion kuj zoo heev.Thaum muab faus rau hauv av, cov raj xa hluav taws xob tau raug cov dej noo, tshuaj lom neeg hauv av thiab lwm yam corrosive.Kauv submerged arc kav yog tsim tshwj xeeb los tiv thaiv cov av hauv av hnyav, ua kom lub neej ntev thiab kev ntseeg siab ntawm cov kav dej ntuj.

Ntxiv nrog rau kev tiv thaiv corrosion,hollow-section structural kavmuab superior zog thiab stability, ua rau lawv haum rau underground installations.Kev tsim kauv ntawm cov kav dej no muaj peev xwm ua tau zoo heev, tso cai rau lawv tiv taus qhov hnyav ntawm cov av thiab lwm yam sab nraud yam tsis muaj kev cuam tshuam rau lawv cov qauv kev ntseeg siab.Qhov no yog qhov tseem ceeb tshwj xeeb hauv cov cheeb tsam uas nyuaj geology, qhov twg cov kav dej yuav tsum muaj peev xwm tiv taus av txav thiab kev sib haum xeeb.

Tsis tas li ntawd, hollow seem structural kav yog paub rau lawv versatility thiab nqi-zoo.Lawv tuaj nyob rau hauv ntau qhov ntau thiab tsawg thiab thicknesses thiab tuaj yeem ua raws li cov kev cai tshwj xeeb ntawm cov dej xa hluav taws xob hauv av.Qhov no nyob rau hauv lem txo qhov kev xav tau ntxiv fittings thiab vuam, uas ua rau kom ceev installation thiab txo nqi tag nrho.Lub teeb nyhav ntawm cov kav dej no kuj ua rau kev thauj mus los thiab tuav tau zoo dua, ntxiv rau kev txuag nqi.

Thaum nws los txog rau kev nyab xeeb thiab efficiency ntawmunderground natural gas kab, kev xaiv cov khoom yog qhov tseem ceeb.Hollow-section structural kav, tshwj xeeb tshaj yog muab kauv submerged arc kav, muab lub zog, durability, corrosion kuj thiab nqi-zoo, ua rau lawv zoo tagnrho rau underground natural gas kis.Los ntawm kev nqis peev hauv cov kav dej zoo tsim tshwj xeeb rau cov chaw hauv av, cov tuam txhab roj tuaj yeem ua kom muaj kev ntseeg siab thiab siv tau ntev ntawm lawv cov kev tsim kho vaj tse thaum txo nqi kho thiab kho cov nqi mus ntev.

Hauv cov ntsiab lus, hollow cross-section cov kav dej ua lub luag haujlwm tseem ceeb hauv kev tsim cov kab hluav taws xob hauv av.Nws superior corrosion kuj, superior zog thiab nqi-effectiveness ua rau nws thawj qhov kev xaiv rau tej yam ntuj tso roj tsheb thauj mus los.Los ntawm kev xaiv cov ntaub ntawv tsim nyog rau cov chaw hauv av, cov tuam txhab roj av tuaj yeem tswj hwm kev nyab xeeb thiab kev ntseeg siab ntawm lawv cov kev tsim kho vaj tse, thaum kawg pab xa cov roj av zoo rau cov neeg siv khoom.