I-ASTM A252 Ibanga lesi-3into evame ukusetshenziswa kakhulu njengepayipi lenqwaba ye-cylindrical.
Izinqwaba zamapayipi ensimbi zeBanga lesi-3 azikhawulelwe enqubweni ethile yokukhiqiza futhi zingenziwa kusetshenziswa izindlela ezahlukahlukene zokwenza amapayipi, okuhlanganisaI-SMLS(engenamthungo),SAW(i-arc engaphansi eshiselwe), futhiEFW(i-electro-fusion welded).Lokhu kuvumelana nezimo kuyivumela ukuthi ivumelane nezidingo ezahlukene zobunjiniyela kanye nezimo zohlelo lokusebenza.
Njengebanga eliphakeme kunawo wonke kuzinga le-A52, inezakhiwo ezinhle kakhulu zemishini ezinamandla amancane okukhiqiza angu-310 MPa namandla amancane okudonsa angama-455 MPa futhi ingasetshenziswa njengengxenye yesakhiwo esithwala umthwalo unomphela noma njengegobolondo lokuphonswa. -beka izinqwaba zikakhonkolo.
II-ASTM A252okujwayelekile kuhlukanisa inqwaba yamapayipi ensimbi abe amabanga amathathu ukuze ivumelane nezimo ezihlukene zohlelo lokusebenza kanye nezidingo zokulayisha.Amabanga amathathu yilawa:
Grade 1, Grade 2, kanye Grade 3.
Le nkampani yethule isethi ephelele yemishini yokukhiqiza yamapayipi ensimbi ethuthukisiwe ye-JCOE LSAW kanye nemishini yokuhlola, esebenza ngokukhethekile ekukhiqizeni ipayipi lensimbi elinezindonga ezinkulu, elinobubanzi obukhulu be-LSAW nge-DSAW (i-arc welding enamacala amabili).
Imininingwane yomkhiqizo yilezi:
Ububanzi bangaphandle: DN 350 - 1500;
Ukuqina Kwezindonga: 8 - 80 mm;
Izinqwaba zamapayipi ziyoba nesiphetho esingenalutho.
Iziphetho kufanele zisikwe ilangabi noma zisikwe ngomshini futhi zicishwe.
Uma kwenzeka kubaiziphetho ezibeveled, i-engeli yokuphela kwe-beveled kufanele ibe30 - 35 °.
Insimbi ye-Botopinikeza izinhlobonhlobo zamapayipi ensimbi ekhwalithi ephezulu ye-ASTM A52.Sicela uzizwe ukhululekile ukusithinta ngezidingo zakho.
Insimbi izokwenziwa ngeyodwa noma ngaphezulu yalezi zinqubo ezilandelayo: i-open-hearth, i-basic-oxygen, noma isithando somlilo sikagesi.
I-A252 izokwenziwa ngabakwaengenamthungo, ukumelana kukagesi ashiselwe, flash ashiselwe, nomafusion ashiselweinqubo.
Imithungo yezinqwaba zamapayipi ashiselwe kufanele ibei-longitudinal, i-helical-butt, nomai-helical-lap.
Ukuqinisekisa ikhwalithi nokusebenza kwezinqwaba zamapayipi ensimbi, kubalulekile ukukhetha inqubo yokukhiqiza efanele.
Inqubo ye-LSAW (SAWL) ilungele ipayipi lensimbi enobubanzi obukhulu, enodonga oluwugqinsi, ikakhulukazi kumaphrojekthi wokwakha kanye nengqalasizinda adinga umthamo omkhulu wokuthwala umthwalo kanye nokwakhiwa kwesisekelo esijulile.Ngenxa yamandla ayo aphakeme, amandla okuthwala umthwalo, kanye nokuzivumelanisa nezimo ezijulile, iyakwazi ukuzivumelanisa nezimo ezihlukahlukene ze-geologic eziyinkimbinkimbi kuyilapho inikeza izinzuzo zokufakwa okusheshayo nokuqina kwesikhathi eside.
JCOEkuyinqubo evamile yokwakha ekukhiqizeni ipayipi lensimbi le-LSAW, elinezinzuzo zokusebenza kahle okuphezulu, ikhwalithi ephezulu, umthamo omkhulu wokukhiqiza ububanzi, ukunemba kobukhulu, ukuguquguquka, kanye nomnotho, okukwenze kwaba yinqubo ethandwayo yokwakha ipayipi ezindaweni eziningi ezinkulu- amaphrojekthi wobunjiniyela esikalini.
Insimbi izoqukathaakukho ngaphezu kwe-0.050% ye-phosphorus.
Ukukhawulela okuqukethwe kwe-phosphorus ensimbi ukuqinisekisa ukuthi insimbi inezakhiwo ezinhle zokusebenza, ikakhulukazi uma isetshenziselwa izinhlelo zokusebenza zesakhiwo ezifana nokunqwabelanisa isakhiwo.
Lo mkhawulo usiza ukuvimbela insimbi ukuthi ingabi brittle kakhulu emazingeni okushisa aphansi, ngaleyo ndlela iqinisekise ukuphepha nokuthembeka kwayo ekusetshenzisweni.
Ngokunye okuqukethwe kwama-elementi, azikho izimfuneko.
Lokhu kungenxa yokuthi okugxilwe kakhulu kwamashubhu enqwaba yamapayipi ukuqinisekisa ukuthi amashubhu anamandla anele esakhiwo nokuqina, okuyizinto ezibalulekile ezingasetshenziswa ezakhiweni ezisekelayo.
Kumashubhu enqwaba yamashubhu, kubhekwe kakhulu ukunaka kwemishini yamashubhu, njengamandla okukhiqiza, amandla aqinile, nokuqina, njengoba lezi zakhiwo zihlobene ngqo namandla okuthwala umthwalo kanye nokuzinza kwesakhiwo sezinqwaba zamashubhu ekusebenzeni okusebenzayo. .
AIthebula 2 linikeza amanani aphansi ebaliwe:
Lapho ukujiya kodonga olushiwo kumaphakathi kulawo aboniswe ngenhla, ubuncane bevelu yobude buzonqunywa ngale ndlela elandelayo:
Ibanga lesi-3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: ubude ngama-intshi angu-2 [50.8 mm], %;
t: ukujiya kodonga olucacisiwe, ngaphakathi. [mm].
Izinga le-ASTM A252 Ibanga lesi-3 liqinisekisa ukuphepha nokuthembeka kwezinqwaba zamashubhu ezisetshenziswayo ngokubeka izidingo ezincane zalezi zakhiwo zikamshini.
Ngobukhulu bepayipi obungabaliwe kumathebula esisindo sepayipi, isisindo ngobude beyunithi ngayinye singabalwa kusetshenziswa ifomula.
w = C×(Dt)×t
w: isisindo ngobude beyunithi ngayinye, Ilb/ft [kg/m];
D: kucaciswe ububanzi bangaphandle, ngaphakathi. [mm];
t: ukujiya kodonga olucacisiwe, ngaphakathi. [mm];
C: 0.0246615 ngezibalo zamayunithi e-SI kanye no-10.69 wezibalo zamayunithi e-USC.
Izibalo ezingenhla zisekelwe ekucabangeni kokuthi ukuminyana kwepayipi lensimbi kungu-7.85 kg/dm³.
I-ASTM A252 Grade 3 inamandla aphezulu kanye nokuqina kwezinhlobonhlobo zenhlabathi kanye nezidingo zokuthwala umthwalo.Leli payipi lensimbi livame ukusetshenziswa kulezi zicelo ezilandelayo:
1. Ukwakha izisekelo: Ipayipi lensimbi ye-ASTM A252 yeBanga lesi-3 lisetshenziswa njengezisekelo zenqwaba emsebenzini wesisekelo sezakhiwo eziphakeme, amabhuloho, nezinye izakhiwo ezinkulu ukuze kuhlinzekwe ukwesekwa okudingekayo nokuzinza.
2. Amachweba namachweba: Lawa mapayipi ensimbi asetshenziselwa ukunqwabelanisa ekwakhiweni kwamachweba namachweba ukuze kuqinisekiswe ukuthi isakhiwo siyakwazi ukumelana nomthelela wemikhumbi kanye nokuguguleka kwemvelo yasolwandle.Ukuze ukwandise ukuqina nokumelana nokugqwala kwamapayipi ensimbi, ukugqoka kuvame ukusetshenziswa ukuze kunikeze ukuvikeleka okwengeziwe.
3. Imisebenzi yamanzi: Ipayipi lensimbi ye-ASTM A252 yeBanga lesi-3 lisetshenziselwa ukuqinisa usebe lwemifula nokuhlinzeka ngokuvikelwa kwezikhukhula ekwakhiweni kwamadamu, izingidi, nezinye izinsiza zamanzi.
4. Amaphrojekthi Amandla: Emandleni omoya, izinsimbi zikawoyela, kanye neminye imiklamo yengqalasizinda yamandla, lawa mapayipi ensimbi asetshenziswa njengezakhiwo zokusekela ukuze kuqinisekiswe ukusebenza okuzinzile kwempahla.
5. Izinsiza zokuhamba: Ipayipi lensimbi le-ASTM A252 Lebanga lesi-3 lisetshenziselwa ukunqwabelanisa ekwakhiweni kwezitimela, imigwaqo emikhulu, kanye nemigwaqo yezindiza zezindiza ukuze inikeze umthamo owanele wokuthwala umthwalo kanye nokuqina.
Kusukela yasungulwa ngo-2014,Insimbi ye-Botopisibe ngumphakeli ohamba phambili wepayipi lensimbi ye-carbon eNyakatho yeChina, elaziwa ngomsebenzi omuhle kakhulu, imikhiqizo yekhwalithi ephezulu, nezixazululo ezibanzi.
Insimbi ye-Botopinikeza izinhlobonhlobo zamapayipi ensimbi yensimbi nemikhiqizo ehlobene, ehlanganisa ipayipi lensimbi engenamthungo, i-ERW, i-LSAW, ne-SSAW, kanye nohlu oluphelele lokufakwa kwamapayipi nama-flange.Imikhiqizo yayo ekhethekile ihlanganisa ama-alloys asezingeni eliphezulu kanye nezinsimbi ezingenasici ze-austenitic, ezenzelwe ukuhlangabezana nezidingo zamaphrojekthi ahlukahlukene wamapayipi.
I-ASTM A252 GR.2 GR.3 Ipayipi Lenqwaba Yensimbi Engenamthungo
ASTM A252 GR.3 SSAW Steel Piles Piles Piles
AS 1579 SSAW Ipayipi Lensimbi Yamanzi Nenqwaba Yensimbi
I-EN10219 S355J0H LSAW(JCOE) Inqwaba Yepayipi Lensimbi
I-EN 10219 S275J0H/S275J2H ERW Ipayipi Lensimbi Lesakhiwo
I-BS EN10210 S355J0H Ipayipi Lensimbi Lekhabhoni Elingenamthungo
I-EN10210 S355J2H IPHAYIPHA LESTEEL LESAKHIWO
I-API 5L PSL1&PSL2 GR.B Longitudinal Submerged-Arc Welded Pipe
I-ASTM A501 Ibanga B LSAW I-Carbon Steel Structural Tubing
I-ASTM A672 B60/B70/C60/C65/C70 LSAW Ipayipi Lensimbi Lekhabhoni
I-ASTM A671/A671M LSAW Ipayipi Lensimbi
I-ASTM A500 yeBanga C le-Seamless Steel Structural Tube
