Simba reMapaipi Akasungirirwa Kaviri muMashandisirwo Emaindasitiri

Simba reMapaipi Akasungirirwa Kaviri Mukushandiswa Kwemaindasitiri Mufananidzo Wakaratidzwa

Tsananguro pfupi:

Munyika yemapaipi emaindasitiri, kusarudza zvinhu uye nzira dzekuvaka zvinogona kuva nemhedzisiro yakakura pakushanda kwese uye kugara kwenguva refu kwehurongwa. Imwe nzira inozivikanwa nekuda kwesimba rayo uye kugara kwenguva refu ndeyekushandisa mapaipi ane welded kaviri. Mapaipi aya akagadzirwa kuti agone kutsungirira kumanikidzwa kwakanyanya, tembiricha yakanyanya uye mamiriro ekunze akaoma, zvichiita kuti akwanise kushandiswa mumaindasitiri akasiyana-siyana.

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Mapombi akasungirirwa kaviridzakavakwa nesimbi mbiri dzakazvimiririra kuti dzigadzire kubatana kwakasimba uye kwakavimbika pakati pezvikamu zvepombi. Maitiro aya ekushongedza kaviri anoita kuti pombi ikwanise kutsungirira kushushikana nekuoma kunogona kusangana nako panguva yekushanda, zvichiita kuti ive sarudzo yakavimbika yekushandiswa kwakakosha uko kukundikana kusiri sarudzo.

Chimwe chezvakanakira zvikuru zvemapaipi ane welded kaviri kugona kwawo kubata nharaunda dzine kumanikidzwa kwakanyanya. Maitiro ewelding maviri anogadzira kubatana kwakasimba uye kusina musono pakati pezvikamu zvemapaipi, zvichiita kuti zvikwanise kumira kumanikidzwa kwemukati pasina njodzi yekudonha kana kukundikana. Izvi zvinoita kuti zvive zvakanaka kune zvinoshandiswa zvakaita semapaipi emafuta negasi, uko kusimba kwehurongwa hwemapaipi kwakakosha pakuchengetedza uye kushanda zvakanaka.

Tafura 2 Hunhu Hukuru hweMapombi eSimbi (GB/T3091-2008, GB/T9711-2011 uye API Spec 5L)
Zvakajairika	Giredhi reSimbi	Zvikamu zveMakemikari (%)						Nzvimbo Inosungirira						Kuedza kweCharpy (V notch) Impact
		c	Mn	p	s	Si	Zvimwe	Simba reGoho (Mpa)		Simba reKusimba (Mpa)		（L0=5.65 √ S0）Kutambanudzwa kweminiti （%）
		zvakanyanya	zvakanyanya	zvakanyanya	zvakanyanya	zvakanyanya	Zvimwe	miniti	zvakanyanya	miniti	zvakanyanya	D ≤ 168.33mm	D ＞ 168.3mm
GB/T3091 -2008	Q215A	≤ 0.15	0.25 ＜ 1.20	0.045	0.050	0.35	Kuwedzera NbVTi zvichienderana neGB/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 ＜ 0.65	0.045	0.050	0.035		235		375		15	>26
	Q235B	≤ 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		Sarudzo yekuwedzera chimwe chezvinhu zveNbVTi kana chero musanganiswa wazvo	175		310		27		Imwe kana mbiri dzechiratidzo chekusimba kwesimba reimpact uye nzvimbo yekuchekerera simbi dzinogona kusarudzwa. Kune L555, ona standard.
	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		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		Kune simbi yegiredhi B, Nb+V ≤ 0.03%; kune simbi ≥ giredhi B, kuwedzera Nb kana V kana musanganiswa wavo, uye Nb+V+Ti ≤ 0.15%	172		310		（L0=50.8mm）kuti iverengwe zvichienderana nefomura inotevera:e=1944·A0 .2/U0 .0 A:Nzvimbo yemuenzaniso mu mm2 U: Simba shoma rekudhonza mu Mpa		Hapana kana chimwe kana zvese zviri zviviri simba rekukanda uye nzvimbo yekuchekerera inodiwa senzira yekusimba.
	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
	X65	0.26	1.45	0.030	0.030			448		531
	X70	0.26	1.65	0.030	0.030			483		565

Pamusoro pekusimba kwayo, mapaipi akasungirirwa kaviri anokwanisawo kutsungirira kupisa kwakanyanya, zvichiita kuti akwanise kushandiswa mumabasa akasiyana-siyana emaindasitiri. Ingave iri kutakura mvura inopisa kana magasi, kana kushanda munzvimbo dzine tembiricha dzinochinja-chinja, mapaipi akasungirirwa kaviri anochengetedza chimiro chayo chakasimba uye mashandiro, zvichiita kuti ishande zvakanaka kunyangwe mumamiriro ezvinhu akaoma zvikuru.

Pamusoro pezvo, kugara kwenguva refu kwepombi dzakasungirirwa kaviri kunoita kuti ive sarudzo inodhura zvishoma pakushandiswa mumaindasitiri. Kugona kwadzo kutsungirira kusakara, ngura nedzimwe nzira dzekuora zvinoreva kuti hadzidi kugadziriswa zvakanyanya uye kutsiviwa, zvichideredza mari yekushandisa uye nguva yekushanda.

Kazhinji, kushandiswa kwepombi dzakasungirirwa kaviri kunopa mabhenefiti akasiyana-siyana mumaindasitiri, kusanganisira kusimba, kugara kwenguva refu uye kuvimbika. Kugona kwavo kubata kumanikidzwa kwakanyanya, tembiricha dzakanyanya uye mamiriro ekunze akaoma kunoita kuti vakwanise kushandiswa mumaindasitiri akasiyana-siyana kubva kumafuta negesi kusvika pakugadzirisa makemikari. Nekushanda kwayo kwakasimbiswa uye nhoroondo yebasa, pombi dzakasungirirwa kaviri chinhu chakakosha kune chero sisitimu yepombi dzemaindasitiri.