Lub zog ntawm ob npaug welded yeeb nkab hauv kev siv cov ntawv thov

Lub zog ntawm ob npaug welded yeeb nkab nyob rau hauv kev siv cov ntawv thov cov duab

Cov lus piav qhia luv luv:

Nyob hauv lub ntiaj teb kev xaiv thiab kev xaiv cov khoom siv thiab txoj kev tsim kho tuaj yeem muaj kev cuam tshuam tseem ceeb ntawm kev ua haujlwm tag nrho thiab kev ua haujlwm ntev ntawm lub system. Ib txoj kev uas nrov rau nws lub zog thiab lub zog yog siv ob chav welded. Cov kav dej no yog tsim los withstand high pressures, hnyav heev thiab kev mob siab ib puag ncig, ua rau lawv zoo rau ntau yam kev siv khoom.

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Ob Chav Welded Kavtau tsim nrog ob txoj kev ywj pheej welds los ua tus muaj zog thiab txhim khu kev qha ntawm cov yeeb nkab seem. Qhov kev sib tw no ua kom pom tseeb tias cov yeeb nkab tuaj yeem tiv thaiv kev ntxhov siab, ua rau kev siv tseem ceeb rau kev ua haujlwm tsis yog ib qho kev xaiv.

Ib qho ntawm cov ntsiab lus tseem ceeb ntawm ob-welded kav yog lawv lub peev xwm los lis cov chaw muaj kev kub siab. Cov txheej txheem vuam ua rau muaj kev sib txuas thiab cov kab sib txuas ntawm cov yeeb nkab, kom lawv muaj kev pheej hmoo ntawm cov dej xau lossis ua tsis tiav. Qhov no ua rau lawv zoo tshaj plaws rau cov ntawv thov xws li roj thiab roj ntawm lub raj xa dej yog qhov tseem ceeb rau kev nyab xeeb thiab ua haujlwm.

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 NBVTI 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 kev ntxiv ib qho ntawm NBVTI cov ntsiab lus lossis 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

Ntxiv rau nws lub zog, muab ob npaug welded yeeb nkab kuj tseem tuaj yeem tiv thaiv huab kub heev, ua rau nws haum rau ntau cov txheej txheem kev muaj. Seb puas kam thauj cov kua kub lossis roj av, lossis kev ua haujlwm yooj yim thiab kev ua tau zoo, ua kom muaj kev ntseeg siab nyob rau hauv txawm tias cov xwm txheej nyuaj tshaj plaws.

Tsis tas li ntawd, lub txiaj ntsig ntawm ob chav welded yeeb nkab ua rau nws tus nqi xaiv zoo rau kev lag luam. Lawv lub peev xwm tiv thaiv kev hnav, corrosion thiab lwm hom kev ua tsis ncaj lawv xav tau kev tu me me thiab hloov pauv tag nrho cov nqi thiab downtime.

Zuag qhia tag nrho, kev siv ntawm ob chav welded yeeb nkab muab ntau cov txiaj ntsig rau cov ntawv thov kev lag luam, suav nrog lub zog, suav nrog lub zog, kav ntev thiab kev ntseeg tau. Lawv lub peev xwm los lis cov kev ntsuas siab, huab cua sov heev ua rau lawv zoo tshaj rau ntau yam kev lag luam los ntawm cov roj thiab roj rau kev ua haujlwm tshuaj. Nrog nws cov pov thawj kev ua tau zoo thiab kev pabcuam lub neej ntaub ntawv, muab ob npaug rau welded yeeb nkab yog cov khoom muaj nqis rau cov khoom lag luam muaj txiaj ntsig.