Mapaipi Omangamanga Agawo Opanda Pansi Amizere Yapansi Pansi Pansi Pansi

Mapaipi Omangamanga Agawo Opanda Pansi Amizere Yansi Pansi Pansi Pansi Gasi Wachilengedwe Chowonetsedwa

Kufotokozera Kwachidule:

Popanga mapaipi a gasi apansi panthaka, kusankha zinthu ndikofunikira kuti zitsimikizire chitetezo ndi magwiridwe antchito.Machubu opangidwa ndi gawo lopanda kanthu, makamaka machubu ozungulira pansi pamadzi, akudziwika kwambiri chifukwa champhamvu zawo, kulimba kwawo komanso kukana dzimbiri.Mu blog iyi, tiwona kufunikira kwa dzenje-gawo structural mapaipi pomanga mapaipi apansi pansi gasi zachilengedwe ndi ubwino waukulu umene amapereka.

Titumizireni imelo

Tsatanetsatane wa Zamalonda

Zolemba Zamalonda

Spiral pansi pamadzi arcchitolirosamagwiritsidwa ntchito kwambiri pomanga mizere ya gasi wapansi panthaka chifukwa cha kupanga kwawo kwapadera.Mapaipiwa amapangidwa popanga zitsulo zopindika zotentha kuti zikhale zozungulira, kenako kuziwotcherera pogwiritsa ntchito kuwotcherera kwa arc pansi pamadzi.Izi zimapanga mapaipi amphamvu kwambiri a Spiral pansi pamadzi okhala ndi makulidwe ofanana komanso olondola kwambiri, kuwapangitsa kukhala abwino poyendera gasi wapansi panthaka.

Table 2 Main Physical and Chemical Properties of Steel Pipes (GB/T3091-2008, GB/T9711-2011 ndi API Spec 5L)
Standard	Kalasi yachitsulo	Zamankhwala (%)						Tensile Property						Charpy (V notch) Impact Test
		c	Mn	p	s	Si	Zina	Yield Strength (Mpa)		Mphamvu Yamphamvu (Mpa)		(L0 = 5.65 √ S0 (mphindi Wotambasula) (%)
		max	max	max	max	max	Zina	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	Kuwonjezera Nb\V\Ti molingana ndi 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 ＜ 0.65	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		Posankha kuwonjezera chimodzi mwazinthu za Nb\V\Ti kapena kuphatikiza kulikonse	175		310		27		Chimodzi kapena ziwiri mwazowonetsa mphamvu zamphamvu ndi malo ometa zitha kusankhidwa.Kwa L555, onani muyezo.
	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		Kwa kalasi B chitsulo, Nb+V ≤ 0.03%; zitsulo ≥ kalasi B, kusankha kuwonjezera Nb kapena V kapena kuphatikiza kwawo, ndi Nb+V+Ti ≤ 0.15%	172		310		(L0 = 50.8mm) kuti iwerengedwe motsatira ndondomeko iyi: e=1944·A0 .2/U0 .0 A: Dera lachitsanzo mu mm2 U: Mphamvu zochepa zotchulidwa mu Mpa		Palibe kapena chilichonse kapena zonse ziwiri zomwe zimakhudzidwa ndi gawo lometa zomwe zimafunikira ngati muyeso wolimba.
	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

Ubwino wina waukulu wa mapaipi opangidwa ndi chigawo chopanda kanthu ndi kukana kwa dzimbiri.Akakwiriridwa mobisa, mapaipi a gasi achilengedwe amakumana ndi chinyezi, mankhwala anthaka ndi zinthu zina zowononga.Mapaipi a Spiral submerged arc adapangidwa makamaka kuti athe kupirira mikhalidwe yovuta yapansi panthaka, kuwonetsetsa kuti nthawi yayitali komanso kudalirika kwa mapaipi a gasi.

Kuphatikiza pa corrosion resistance,mapaipi opangidwa ndi gawo lopanda kanthukupereka mphamvu zapamwamba ndi kukhazikika, kuwapanga kukhala oyenera kuyika mobisa.Mapangidwe ozungulira a mapaipiwa amapereka mphamvu yabwino yonyamula katundu, kuwalola kupirira kulemera kwa nthaka ndi mphamvu zina zakunja popanda kusokoneza kukhulupirika kwawo.Izi ndizofunikira makamaka m'madera omwe ali ndi zovuta za geology, kumene mapaipi ayenera kupirira kusuntha ndi kukhazikika.

Kuphatikiza apo, mapaipi opangidwa ndi gawo lopanda kanthu amadziwika chifukwa cha kusinthasintha kwawo komanso kutsika mtengo.Amabwera mumitundu yosiyanasiyana komanso makulidwe ndipo amatha kusinthidwa kuti akwaniritse zofunikira zamapaipi apansi panthaka.Izi nazonso zimachepetsa kufunika kowonjezera zowonjezera ndi kuwotcherera, zomwe zimapangitsa kuti ukhazikitsidwe mwachangu komanso kutsika mtengo wonse.Kupepuka kwa mapaipiwa kumapangitsanso zoyendera ndi kusamalira bwino, zomwe zimathandizira kupulumutsa ndalama.

Pankhani ya chitetezo ndi mphamvu yamizere ya gasi wapansi panthaka, kusankha zinthu ndizofunikira.Mapaipi opangidwa ndi chigawo chopanda kanthu, makamaka mapaipi ozungulira omwe ali pansi pamadzi, amaphatikiza mphamvu, kulimba, kukana dzimbiri komanso kuwononga ndalama, kuwapangitsa kukhala abwino kufalitsa gasi lachilengedwe.Pogulitsa mapaipi apamwamba kwambiri omwe amapangidwira malo apansi panthaka, makampani a gasi amatha kutsimikizira kudalirika komanso moyo wautali wa zomangamanga zawo ndikuchepetsa ndalama zokonzetsera ndi kukonza pakapita nthawi.

Mwachidule, mapaipi ang'onoang'ono apakati amathandizira kwambiri popanga mizere ya gasi wapansi panthaka.Kukana kwake kwapamwamba kwa dzimbiri, mphamvu zapamwamba komanso kutsika mtengo kumapangitsa kukhala chisankho choyamba pama projekiti oyendetsa gasi.Posankha zipangizo zoyenera zogwirira ntchito pansi pa nthaka, makampani a gasi amatha kusunga chitetezo ndi kudalirika kwa zomangamanga zawo, potsirizira pake amathandizira kupereka mpweya wabwino kwa ogula.