Zombili izindlela zokukhiqiza amapayipi ensimbi aqinile ashiselwe ngogesi (ERW) kanye nalawo angenamthungo (SMLS) bezilokhu zisetshenziswa amashumi eminyaka; ngokuhamba kwesikhathi, izindlela ezisetshenziswa ukukhiqiza ngayinye yazo ziye zathuthuka. Ngakho yikuphi okungcono?
1. Ukukhiqiza ipayipi elihlanganisiwe
Ipayipi elihlanganisiwe liqala njengeribhoni yensimbi ende, ehlanganisiwe ebizwa ngokuthi i-skelp. I-skelp isikwa ibe nobude obufunwayo, okuholela ephepheni eliyisicaba elingunxande. Ububanzi beziphetho ezimfushane zalelo phepha buzoba umjikelezo wangaphandle wepayipi, inani elingasetshenziswa ukubala ububanzi balo bangaphandle.
Amashidi angunxande adluliselwa ngomshini ogoqayo ogoqa izinhlangothi ezinde zibheke komunye nomunye, kwakha isilinda. Enqubweni ye-ERW, ugesi ohamba ngesivinini esiphezulu udlula phakathi kwemiphetho, okubangela ukuba ancibilike futhi ahlangane ndawonye.
Inzuzo yepayipi le-ERW ukuthi azisetshenziswa izinsimbi zokuhlanganisa futhi umthungo wokushisela awukwazi ukubonwa noma ukuzwakala. Lokho kuphambene nokushisela i-arc engaphansi kwamanzi kabili (i-DSAW), okushiya ngemuva ubhontshisi wokushisela osobala okumele ususwe kuye ngokuthi usetshenziswa kanjani.
Amasu okukhiqiza amapayipi ashiselwe athuthukile eminyakeni edlule. Mhlawumbe intuthuko ebaluleke kakhulu kube ukushintshela kuma-current kagesi asebenzisa imvamisa ephezulu yokushisela. Ngaphambi kweminyaka yama-1970, kwakusetshenziswa i-current esebenzisa imvamisa ephansi. Ama-seam e-weld akhiqizwa yi-ERW esebenzisa imvamisa ephansi ayevame kakhulu ukugqwala kanye nokwehluleka komthungo.
Izinhlobo eziningi zamapayipi ahlanganisiwe zidinga ukwelashwa ngokushisa ngemva kokukhiqizwa.
2. Ukukhiqiza ipayipi elingenamthungo
Amapayipi angenamthungo aqala njenge-hunk eqinile yensimbi ebizwa ngokuthi i-billet. Ngesikhathi isashisa, ama-billet abhobozwa phakathi nendawo nge-mandrel. Isinyathelo esilandelayo ukugoqa nokwelula i-billet engenalutho. I-billet igoqwa futhi yelulwe ngokunembile kuze kube yilapho ihlangana nobude, ububanzi kanye nobukhulu bodonga njengoba kuchaziwe yi-oda lekhasimende.
Ezinye izinhlobo zamapayipi angenamthungo ziyaqina njengoba zikhiqizwa, ngakho-ke ukwelashwa ngokushisa ngemva kokukhiqizwa akudingeki. Ezinye zidinga ukwelashwa ngokushisa. Bheka imininingwane yohlobo lwamapayipi angenamthungo ocabanga ukuwasebenzisa ukuze uthole ukuthi ngabe luzodinga ukwelashwa ngokushisa.
3. Imibono yomlando kanye namacala okusetshenziswa kwepayipi lensimbi elihlanganisiwe vs. elingenamthungo
I-ERW kanye namapayipi ensimbi angenamthungo zikhona njengezindlela ezihlukile namuhla ngenxa yemibono yomlando.
Ngokuvamile, ipayipi elihlanganisiwe lalibhekwa njengelibuthakathaka ngokwemvelo ngoba lalihlanganisa umthungo wokushisela. Ipayipi elingenamthungo lalingenalo leli phutha elibonakalayo lesakhiwo futhi lalibhekwa njengeliphephile. Nakuba kuyiqiniso ukuthi ipayipi elihlanganisiwe lifaka umthungo okwenza libe buthakathaka ngokombono, amasu okukhiqiza kanye nezindlela zokuqinisekisa ikhwalithi ngayinye ithuthuke kakhulu kangangokuthi ipayipi elihlanganisiwe lizosebenza njengoba kufunwa uma ukubekezelelana kwalo kungadluli. Nakuba inzuzo ebonakalayo icacile, ukugxekwa kwamapayipi angenamthungo ukuthi inqubo yokugoqa nokwelula ikhiqiza ukujiya kodonga okungaguquki uma kuqhathaniswa nobukhulu obunembile bamashidi ensimbi ahloselwe ukushisela.
Izindinganiso zemboni ezilawula ukukhiqizwa kanye nokucaciswa kwe-ERW kanye nepayipi lensimbi elingenamthungo zisabonisa leyo mibono. Isibonelo, amapayipi angenamthungo ayadingeka ezinhlotsheni eziningi zokusetshenziswa komfutho ophezulu, okushisa okuphezulu embonini kawoyela negesi, ukukhiqizwa kwamandla kanye nemithi. Amapayipi ashiselwe (ngokuvamile ashibhile ukuwakhiqiza futhi atholakala kabanzi) achazwa kuzo zonke izimboni uma nje izinga lokushisa, ingcindezi kanye nezinye izinto eziguquguqukayo zesevisi zingadluli amapharamitha aphawulwe endinganisweni efanele.
Ekusetshenzisweni kwesakhiwo, akukho mehluko ekusebenzeni phakathi kwe-ERW nepayipi lensimbi elingenamthungo. Nakuba lokhu kokubili kungachazwa ngokushintshana, bekungeke kube nengqondo ukucacisa ipayipi elingenamthungo lapho ipayipi elishisiwe elishibhile lisebenza kahle ngokulinganayo.
4. Sibonise imininingwane yakho, cela isilinganiso bese uthola ipayipi lakho ngokushesha
I-Jindalai Steel Group ihlala igcwele imikhiqizo yamapayipi ensimbi ahlanganisiwe futhi angenamthungo embonini. Sithola amasheya ethu ezimbonini ezizungeze iShayina, siqinisekisa ukuthi abathengi bathola ipayipi ngokushesha ngangokunokwenzeka kungakhathaliseki ukuthi kunemingcele esemthethweni esebenzayo.
I-Jindalai ingakusiza ukuthi wazi inqubo yokuthenga amapayipi kusukela ekuqaleni kuze kube sekupheleni ukuqinisekisa ukuthi uthola okudingayo ngokushesha okukhulu uma sekuyisikhathi sokuthenga. Uma ukuthenga amapayipi kuseza maduze, cela ikhotheshini. Sizokunikeza eyodwa ezokutholela imikhiqizo oyidingayo ngokushesha.
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Isikhathi sokuthunyelwe: Disemba 19-2022
