Mapaipi Ozungulira a Msoko Wa Mapaipi Aakulu a Madzi
Pakumanga zomangamanga, zipangizo zomwe zimagwiritsidwa ntchito zimathandiza kwambiri pakukhala ndi moyo wautali komanso kugwira ntchito bwino kwa polojekitiyi. Chinthu chimodzi chofunikira kwambiri pamakampani opanga zomangamanga ndi mapaipi ozungulira. Mapaipi awa amagwiritsidwa ntchito kwambiri m'njira zosiyanasiyana monga mapaipi amadzi ndi mapaipi a gasi, ndipo kufotokozera kwawo, kuphatikizapo mapaipi ozungulira ndi ozungulira, ndikofunikira kwambiri kuti agwire ntchito bwino. Mu blog iyi, tikambirana mozama zamfundo za chitoliro chozungulira cholumikizidwandi kufunika kwawo mumakampani omanga.
Schitoliro cha msoko wa piralsamapangidwa pogwiritsa ntchito njira yotchedwa njira yolumikizira yozungulira. Njirayi imaphatikizapo kugwiritsa ntchito zitsulo zozungulira zotentha kuti zipangidwe kukhala mawonekedwe a cylindrical kenako zolumikizidwa pamodzi ndi msoko wozungulira. Zotsatira zake zimakhala chitoliro champhamvu komanso cholimba, zomwe zimapangitsa kuti chigwiritsidwe ntchito m'njira zosiyanasiyana. Mapaipi awa amagwiritsa ntchitochubu cholumikizidwaukadaulo panthawi yomanga, kuonetsetsa kuti sizikukhudzidwa ndi zinthu zosiyanasiyana zachilengedwe komanso zovuta, zomwe zimapangitsa kuti zikhale zabwino kwambiri kuti zigwiritsidwe ntchito pansi pa nthaka komanso pansi pa madzi.
| Katundu Waukulu Wachilengedwe ndi Wamankhwala a Mapaipi Achitsulo (GB/T3091-2008, GB/T9711-2011 ndi API Spec 5L) | ||||||||||||||
| Muyezo | Kalasi yachitsulo | Zinthu Zamankhwala (%) | Katundu Wolimba | Mayeso a Charpy (V notch) Impact | ||||||||||
| c | Mn | p | s | Si | Zina | Mphamvu Yopereka (Mpa) | Mphamvu Yokoka (Mpa) | (L0=5.65 √ S0)Mphindi Yotambasula (%) | ||||||
| kuchuluka | kuchuluka | kuchuluka | kuchuluka | kuchuluka | mphindi | kuchuluka | mphindi | kuchuluka | 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 motsatira 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 | Ngati mukufuna kuwonjezera chimodzi mwa zinthu za Nb\V\Ti kapena kuphatikiza kulikonse kwa izo | 175 | 310 | 27 | Chimodzi kapena ziwiri mwa zizindikiro za kulimba kwa mphamvu ya impact ndi malo odulira zingasankhidwe. Pa 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 | Pa chitsulo cha giredi B, Nb+V ≤ 0.03%; pa chitsulo ≥ giredi B, kuwonjezera Nb kapena V kapena kuphatikiza kwawo, ndi Nb+V+Ti ≤ 0.15% | 172 | 310 | (L0=50.8mm)kuti ziwerengedwe motsatira njira iyi:e=1944·A0 .2/U0 .0 A: Dera la chitsanzo mu mm2 U: Mphamvu yochepa yokhazikika mu Mpa | Palibe mphamvu iliyonse kapena zonse ziwiri zomwe zimafunika pa mphamvu yokhudza kuuma kwa chitoliro ndi malo odulira ubweya. | ||||
| 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 | ||||||||
Poganizira zofunikira za chitoliro chozungulira, ndikofunikira kuyang'ana kwambiri pazinthu zofunika monga kukula kwake, makulidwe a khoma ndi kuchuluka kwa zinthu. Kukula kwa chitoliro kumatsimikizira kuthekera kwake kunyamula madzi kapena mpweya, pomwe makulidwe a khoma amatenga gawo lofunikira pakupanga kwake bwino komanso kukana kupanikizika. Kuphatikiza apo, kuchuluka kwa zinthu kumayimira mtundu ndi kapangidwe ka chitsulo chomwe chimagwiritsidwa ntchito ndipo ndi chinthu chofunikira kwambiri pakuwonetsetsa kuti chitolirocho chikugwira ntchito kwa nthawi yayitali komanso kugwira ntchito bwino.
Mu ntchito yomangamapaipi akuluakulu amadziMapaipi ozungulira okhala ndi mipiringidzo ali ndi ubwino wambiri. Mphamvu yawo yolimba komanso kukana dzimbiri zimapangitsa kuti akhale abwino kwambiri ponyamula madzi mtunda wautali, pomwe kusinthasintha kwawo kumalola kuti aziyikidwa mosavuta mozungulira zopinga komanso m'malo ovuta. Kuphatikiza apo, kugwiritsa ntchito mapaipi ozungulira okhala ndi mipiringidzo m'mapaipi achilengedwe kumatsimikizira kuti gasi wachilengedwe amayendetsedwa bwino komanso motetezeka, zomwe zimapangitsa kuti pakhale chuma chofunikira kwambiri m'magawo okhala anthu, amalonda ndi mafakitale.
Kumbali ya zomangamanga, zofunikira pa chitoliro cha msoko wozungulira zimayendetsedwa ndi miyezo ndi malamulo amakampani kuti zitsimikizire kuti zili bwino komanso zikugwira ntchito bwino. Mwachitsanzo, American Petroleum Institute (API) yapanga miyezo yopangira ndi kugwiritsa ntchito chitoliro cha msoko wozungulira chomwe chimafotokoza zofunikira pa kukula, mphamvu, ndi njira zoyesera. Kuphatikiza apo, American Society for Testing and Materials (ASTM) imapereka zofunikira pa kapangidwe ka zinthu ndi kapangidwe ka makina a mapaipi a msoko wozungulira kuti zitsimikizire kuti ndi odalirika komanso otsatira miyezo yamakampani.
Mwachidule, mfundo za mapaipi olumikizidwa ndi spiral ndizofunikira kwambiri pa ntchito yawo yomanga zomangamanga. Kaya amagwiritsidwa ntchito popangira mapayipi amadzi kapenamizere ya gasi, mapaipi awa amapereka mphamvu zosayerekezeka, kulimba komanso kusinthasintha, zomwe zimapangitsa kuti akhale ofunikira kwambiri m'dziko lamakono. Mwa kutsatira miyezo ndi malamulo amakampani, kugwiritsa ntchito mapaipi ozungulira ozungulira kumaonetsetsa kuti machitidwe ofunikira kwambiri ndi otetezeka, ndikutsegula njira yopititsira patsogolo chitukuko chokhazikika komanso kupita patsogolo kwa anthu.








