Hollow-Section Structural Mapaipi For Underground Natural Gas Lines

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Paunenge uchigadzira mapaipi epasi pegasi egasi, kusarudzwa kwezvinhu kwakakosha kuti uve nechokwadi chekuchengetedza uye kugona kwezvivakwa.Hollow chikamu chemaitiro machubhu, kunyanya spiral akanyura arc machubhu, ari kuwedzera mukurumbira nekuda kwesimba rawo repamusoro, kusimba uye kushora.Mune ino blog, isu tichaongorora kukosha kwe hollow-chikamu mapaipi ekugadzira mukuvaka kwepasi pevhu gasi mapaipi uye zvakakosha zvakanakira zvavanopa.

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Spiral yakanyura arcpombisanoshandiswa zvakanyanya mukuvaka mitsara yepasi pevhu gasi nekuda kwemaitiro avo akasiyana ekugadzira.Mapombi anogadzirwa nekugadzira makoiri esimbi inopisa-yakakungurutswa kuita spiral shape yobva yaaputira uchishandisa yakanyura arc welding process.Izvi zvinogadzira yakakwirira-simba Spiral yakanyudzwa arc mapaipi ane yunifomu ukobvu uye yakanakisa dimensional kurongeka, zvichiita kuti ive yakanakira kutakura gasi rechisikigo pasi pevhu.

Tafura 2 Huru Muviri uye Kemikari Zvivakwa zveSimbi Pipe (GB/T3091-2008, GB/T9711-2011 uye API Spec 5L)
Standard	Steel Giredhi	Chemical Constituents (%)						Tensile Property						Charpy(V notch)Impact Test
		c	Mn	p	s	Si	Zvimwe	Goho Simba (Mpa)		Tensile Strength (Mpa)		(L0=5.65 √ S0 ）min Stretch Rate (%)
		max	max	max	max	max	Zvimwe	min	max	min	max	D ≤ 168.33mm	D ＞ 168.3mm
GB/T3091 -2008	Q215A	≤ 0.15	0.25 ＜ 1.20	0.045	0.050	0.35	Kuwedzera Nb\V\Ti zvinoenderana 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 imwe yeNb\V\Ti zvinhu kana chero musanganiswa wavo	175		310		27		Imwe kana maviri eiyo toughness index yesimba rekukanganisa uye nzvimbo yekuveura inogona kusarudzwa.Kune L555, ona chiyero.
	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		Yegiredhi B simbi,Nb+V ≤ 0.03%;yesimbi ≥ giredhi B,optional kuwedzera Nb kana V kana musanganiswa wavo, uye Nb+V+Ti ≤ 0.15%	172		310		(L0 = 50.8mm) ichaverengerwa maererano neformula inotevera:e=1944·A0 .2/U0 .0 A:Nzvimbo yesample mu mm2 U: Minimal yaitaurwa tensile simba muMpa		Hapana kana chero kana ese ari maviri esimba rekukanganisa uye nzvimbo yekuveura inodiwa senzira yekuomesa.
	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

Imwe yemabhenefiti makuru ehollow-section structural pombi ndiyo yakanakisa corrosion resistance.Kana yakavigwa pasi pevhu, mapaipi egasi echisikigo anoratidzwa kune unyoro, makemikari evhu uye zvimwe zvinoparadza zvinhu.Spiral submerged arc pombi dzakagadzirirwa chaizvo kumirisana neaya akaomarara epasi pevhu, kuve nechokwadi chehupenyu hurefu uye kuvimbika kwemapombi egasi chaiwo.

Mukuwedzera kune corrosion resistance,hollow-chikamu structural mapaipikupa simba repamusoro uye kugadzikana, zvichiita kuti zvive zvakakodzera kuiswa kwepasi pevhu.Iyo spiral dhizaini yemapombi aya inopa yakanakisa kutakura mutoro, ichivabvumira kutsungirira huremu hwevhu uye mamwe masimba ekunze pasina kukanganisa kuvimbika kwavo kwechimiro.Izvi zvinonyanya kukosha munzvimbo dzine dambudziko re geology, uko mapaipi anofanirwa kukwanisa kumira kufamba kwepasi uye kugadzirisa.

Pamusoro pezvo, hollow chikamu mapaipi ekuumbwa anozivikanwa nekusiyana-siyana uye mutengo-kushanda.Iwo anouya muhukuru hwakasiyana-siyana uye ukobvu uye anogona kugadzirwa kuti asangane nezvinodiwa chaizvo zvepasi pevhu echisikigo pombi mapurojekiti.Izvi zvinoderedza kudiwa kwekuwedzera mafittings uye welding, zvichikonzera kukurumidza kuisirwa uye kudzikira kwese mutengo.Huremu hwemapombi aya hunoitawo kuti kufambisa nekubata zvinyatsoshanda, zvichiwedzera kubatsira mukuchengetedza mari.

Kana zvasvika kune kuchengetedzwa uye kushanda zvakanaka kwemitsetse yepasi pegasi, kusarudzwa kwezvinhu kunokosha.Hollow-chikamu structural pombi, kunyanya spiral akanyura arc pombi, anosanganisa simba, kusimba, kushora kuramba uye kudhura-kushanda, zvichiita kuti ive yakanakira kufambisa gasi repasi pevhu.Nekudyara mumapaipi emhando yepamusoro akagadzirirwa zvakagadzirirwa zvivakwa zvepasi pevhu, makambani egasi anogona kuve nechokwadi chekuvimbika uye hupenyu hurefu hwezvivakwa zvavo uku achidzikisa mari yekuchengetedza nekugadzirisa kwenguva refu.

Mukupfupisa, hollow cross-section structural pombi dzinoita basa rakakosha mukuvaka mitsara yepasi pevhu.Kuramba kwayo kwepamusoro-soro, simba repamusoro uye kushanda nesimba kunoita kuti ive sarudzo yekutanga yemapurojekiti ekufambisa gasi.Nekusarudza zvinhu zvakanaka zvezvivakwa zvepasi pevhu, makambani egasi chaiwo anogona kuchengetedza kuchengetedzeka uye kuvimbika kwezvivakwa zvavo, pakupedzisira achibatsira kuendesa gasi rechisikigo zvakanaka kune vatengi.