HOLLOW-Ntu Cov Khaub Ncaws Kav Rau Cov Kab Roj Av Underground

HOLLOW-Ntu Cov Khaub Ncaws Kev Ua Si Rau Cov Kab Roj Nkos Nkhaus Natural

Cov lus piav qhia luv luv:

Thaum kev tsim kho cov khoom lag luam hauv cov roj av hauv cov roj av, cov khoom xaiv yog qhov tseem ceeb los ua kom muaj kev nyab xeeb thiab ua haujlwm ntawm cov vaj tse. Hollow ntu qauv qauv, tshwj xeeb tshaj yog muab kauv submerged Arc, tau dhau los ua kom nrov vim lawv muaj zog zoo dua qub, durability thiab corrosion tsis kam. Hauv cov blog no, peb yuav tshawb txog qhov tseem ceeb ntawm hollow-Ntu cov kav dej hauv kev tsim kho ntawm cov pa roj av hauv av thiab cov ntsiab lus tseem ceeb lawv muaj.

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Muab kauv submerged arctus kav dejsyog dav siv nyob rau hauv kev tsim kho ntawm cov roj av hauv av vim lawv cov txheej txheem tsim khoom lag luam. Cov kav dej tau tsim los ntawm kev sib sau coils ntawm kub-rolled steel mus rau ib tug kauv duab thiab mam li muab cov khoom siv ntawm armergle arc vuam. Qhov no ua rau muaj kev kub siab kauv submerged Arc kav nrog cov khaub noom tuab thiab ua kom zoo nkauj rau kev thauj khoom hauv cov pa nkev.

Cov lus 2 lub cev thiab tshuaj ntawm cov kav hlau (GB / T3091-2008, GB / T9711 thiab API spec 5L)
Lub hom phiaj	Qib hlau	Tshuaj txhuam khoom (%)						Cov Cuab Yeej Tensile						Charpy (v nepch) cuam tshuam kev xeem
		c	Mn	p	s	Si	Lwm	Yield zog (mpa)		Tensile lub zog (mpa)		(L0 = 5.65 √ab nqi (%)
		tus zuag	tus zuag	tus zuag	tus zuag	tus zuag	Lwm	lub min	tus zuag	lub min	tus zuag	D ≤ 168.3mm	D> 168.3mm
GB / T3091 -2008	Q215a	≤ 0.15	0.25 <1.20	0.045	0.050	0.35	Ntxiv NB \ V \ TI nyob rau hauv raws li GB / T1591-94	215		335		15	31
	Q215B	≤ 0.15	0.25-0.55	0.045	0.045	0.035		215		335		15	31
	Q235A	≤ 0.22	0.30 <0.305	0.045	0.050	0.035		235		375		15	26
	Q235b	Ent 0.20	0.30 ≤ 1.80	0.045	0.045	0.035		235		375		15	26
	Q295A	0.16	0.80-1.50	0.045	0.045	0.55		295		390		13	> 23
	Q295B	0.16	0.80-1.50	0.045	0.040	0.55		295		390		13	> 23
	Q345a	0.20	1.00-1.60	0.045	0.045	0.55		345		510		13	> 21
	Q345b	0.20	1.00-1.60	0.045	0.040	0.55		345		510		13	> 21
GB / T9711-2011 (PSL1)	L175	0.21	0.60	0.030	0.030		Yeem ntxiv ib qho ntawm NB \ v \ ti ntsiab lossis ib qho kev sib xyaw ntawm lawv	175		310		27		Ib lossis ob ntawm kev ntsuas qhov nyuaj ntawm kev cuam tshuam lub zog thiab cov chaw pov tseg. Rau L555, saib tus qauv.
	L210	0.22	0.90	0.030	0.030			210		335		25
	L245	0.26	1.20	0.030	0.030			245		415		21
	L290	0.26	1.30	0.030	0.030			290		415		21
	L320	0.26	1.40	0.030	0.030			320		Yam 435		20
	L360	0.26	1.40	0.030	0.030			360		460		19
	L390	0.26	1.40	0.030	0.030			390		390		18
	L415	0.26	1.40	0.030	0.030			415		520		17
	L450	0.26	1.45	0.030	0.030			450		535		17
	L485	0.26	1.65	0.030	0.030			485		570		16
API 5L (PSL 1)	A25	0.21	0.60	0.030	0.030		Rau qib b steel, nb + v ≤ 0.03%; yeem ntxiv NB lossis V lossis lawv cov v + ≤ 0.15%	172		310		(L0 = 50.8mm) yuav tsum xam raws li cov qauv hauv qab no: e = 19444 .2 / Siv cov qauv ntawm lub zog hauv Mpa		Tsis muaj ib qho lossis ib qho lossis ob qho tib si ntawm cov hluav taws xob cuam tshuam thiab thaj chaw shearing yog qhov yuav tsum tau ua raws li kev ntsuas tawv.
	A	0.22	0.90	0.030	0.030			207		331
	B	0.26	1.20	0.030	0.030			241		414
	X42	0.26	1.30	0.030	0.030			290		414
	X46	0.26	1.40	0.030	0.030			317		434
	X52	0.26	1.40	0.030	0.030			359		455
	X56	0.26	1.40	0.030	0.030			386		490
	X60	0.26	1.40	0.030	0.030			414		517
	X 65	0.26	1.45	0.030	0.030			448		531
	X70	0.26	1.65	0.030	0.030			483		565

Ib qho ntawm cov ntsiab lus tseem ceeb ntawm cov hollow-seem cov qauv kav dej yog lawv cov khoom siv corrosion zoo heev. Thaum faus av hauv av, ntuj roj pipelines raug rau cov dej noo, cov tshuaj av thiab lwm yam corrosive. Muab kauv submerged arc kav yog tsim tshwj xeeb los tiv thaiv cov pa hluav taws xob hauv av, ua kom muaj kev ntseeg siab thiab muaj kev ntseeg siab ntawm cov roj nkev.

Ntxiv nrog rau corrosion tsis kam,HOLLOW-NTU-NTU COV KAUV TXUJ CI PIPESMuab lub zog superior thiab ruaj khov, ua rau lawv haum rau hauv av sib sau. Tus muab kauv tsim ntawm cov kav dej no muab cov peev txheej-coj tau zoo heev, tso cai rau lawv tiv thaiv cov av sab nraud yam tsis muaj kev sib cuam tshuam lawv cov qauv txheej txheem. Qhov no yog qhov tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam nrog cov raj garology, uas cov raj xa dej yuav tsum muaj peev xwm tiv thaiv hauv av thiab kev sib hais haum.

Tsis tas li ntawd, Hollow ntu cov kav dej tau paub txog lawv cov versatility thiab tus nqi-ua hauj lwm zoo. Lawv los rau ntau qhov ntau thiab tsawg thiab tuaj yeem tsim kho kom tau raws li cov kev xav tau ntawm cov phiaj xwm kev lag luam hauv av. Qhov no nyeg txo qhov kev xav tau kom muaj cov fittings ntxiv thiab vuam, ua rau kev teeb tsa sai dua thiab txo qis cov nqi. Lub teeb ci ntsa iab ntawm cov kav dej tseem ua rau kev thauj mus los thiab tuav tau ntau dua, txuas ntxiv pab txhawb nqa nyiaj txuag.

Thaum nws los txog rau kev nyab xeeb thiab ua haujlwm ntawmUnderground ntsuab kab, cov ntaub ntawv xaiv yog qhov tseem ceeb. Hollow-seem cov qauv txheej txheem kos duab, tshwj xeeb tshaj yog muab kauv rau cov roj ntsha Los ntawm kev nqis peev hauv cov raj roj muaj txiaj ntsig zoo tsim tshwj xeeb rau cov chaw muaj kev ntseeg siab thiab ntev ntawm lawv cov nqi kho mob thiab kho cov nqi hauv lub sijhawm ntev.

Hauv cov ntsiab lus, hollow cross-seem cov qauv kav dej ua si lub luag haujlwm tseem ceeb hauv kev tsim cov roj av hauv av. Nws lub zog txhim kho, lub zog superior kom zoo dua ua qhov kev xaiv thawj zaug rau cov phiaj xwm kev thauj khoom. Los ntawm kev xaiv cov ntaub ntawv zoo rau cov chaw nyob hauv av, cov tuam txhab roj ntuj tuaj yeem tswj hwm kev nyab xeeb thiab kev ntseeg tau ntawm lawv cov roj av, pab xa cov roj zoo rau cov neeg siv khoom.