1. Umgomo obalulekile we-arc welding ngama-electrode
Ukuze kufakwe futhi kushiselwe amapayipi ububanzi bawo abukhulu kakhulu (njengangaphansi kuka-610mm) nobude bepayipi abubude kakhulu (njengangaphansi kuka-100km), ukushisela kwe-electrode arc kufanele kubhekwe njengokukhetha kokuqala.Kulokhu, i-electrode arc welding iyindlela yokonga kakhulu ye-Welding.
Uma kuqhathaniswa nokushisela okuzenzakalelayo, kudinga izinto zokusebenza ezincane kanye nezisebenzi, izindleko eziphansi zokuyilungisa, kanye neqembu lokwakha elivuthiwe.
I-Electrode arc welding isetshenziselwe ukufakwa nokushisela iminyaka engaphezu kwengu-50.Ama-electrode ahlukahlukene nezindlela ezahlukahlukene zokusebenza zivuthiwe kwezobuchwepheshe.Inani elikhulu ledatha, ukuhlolwa kwekhwalithi kulula.
Yiqiniso, ukuze kufakwe amapayipi ensimbi esezingeni eliphezulu, ukunakwa kufanele kukhokhwe ekukhethweni nasekulawuleni izinduku zokushisela kanye nezinyathelo zenqubo.Lapho ukushiselwa kulandela ukucaciswa kwepayipi okujwayelekile AP1STD1104-2005 “Ukushisela kwamapayipi nemishini ehlobene), sebenzisa abashiseli abaqeqeshiwe abaqeqeshiwe futhi bahlolwa.Lapho kuhlolwa i-radiographic eyi-100%, kungenzeka ukulawula izinga lokulungisa lawo wonke ama-welds angaphansi kuka-3%.
Ngenxa yezindleko eziphansi nokunakekelwa.Ngokuhambisana nekhwalithi eqinisekisiwe, ukushiselwa kwe-electrode arc kube ukukhetha kokuqala kosonkontileka abaningi bephrojekthi esikhathini esidlule.
2. Umgomo obalulekile wokushisela we-arc othomathikhi
Njengoba kushiwo ngaphambili, i-arc ye-arc automatic welding yamapayipi yenziwa eziteshini zokushisela amapayipi eziklanyelwe amapayipi.Uma amapayipi amabili ehlanganiswe eduze nesayithi (i-welding kabili yepayipi), inani lama-welds emgqeni omkhulu lingancishiswa ngo-40% kuya ku-50%, elinciphisa kakhulu umjikelezo wokubeka.
Ukusebenza kahle okuphezulu kanye nezinga eliphezulu lokushisela okuzenzakalelayo kwe-arc okuzenzakalelayo kokufakwa kwe-welding kuyabonakala, ikakhulukazi kumapayipi anobubanzi obukhulu (ngaphezu kuka-406mm) nokuqina kodonga okudlula u-9.5mm, lapho ibanga lokubeka lide, ngenxa yezizathu zezomnotho, Ngokuvamile, indlela ukushiselwa kwe-arc okuzenzakalelayo kucatshangelwa kuqala.
Kodwa-ke, ivoti elilodwa liwukuthi umgwaqo wokuthutha amapayipi amabili ungenziwa yini, noma izimo zomgwaqo ziyakuvumela, nokuthi zikhona yini izimo zokuthutha amapayipi aphindwe kabili ubude obungaphezu kuka-25m.Uma kungenjalo, ukusetshenziswa kwe-arc welding okuzenzakalelayo ngeke kube nalutho.
Ngakho-ke, kumapayipi amabanga amade anobubanzi obungaphezu kuka-406mm nobukhulu bodonga olukhulu, lapho zingekho izinkinga kwezokuthutha kanye nezimo zomgwaqo, indlela yokushisela amapayipi aphindwe kabili noma kathathu ane-automatic submerged arc welding iyisinqumo esingcono kakhulu sosonkontileka bephrojekthi.
3.I-Flux cored wireumgomo we-semi-automatic welding
Ihlanganiswe ne-electrode arc welding, i-flux cored wire semi-automatic welding iyinqubo enhle yokushisela yokugcwalisa i-welding kanye nekhava ye-welding yamapayipi ensimbi anobubanzi obukhulu nawugqinsi.
Inhloso eyinhloko ukushintsha inqubo yokushisela ngezikhathi ezithile ibe imodi yokukhiqiza eqhubekayo, futhi ukuminyana kwamanje kwe-welding kungaphezu kwalokho kwe-electrode arc welding, ucingo lokushisela luncibilika ngokushesha, futhi ukusebenza kahle kokukhiqiza kungaba izikhathi ezi-3 kuya kwezi-5 kune-electrode arc. i-welding, ngakho-ke ukusebenza kahle kokukhiqiza kuphezulu.
Njengamanje, i-self-shielded flux-coreed wire semi-automatic welding isetshenziswa kabanzi ekushiseleni amapayipi endle ngenxa yokumelana komoya okuqinile, okuqukethwe kwe-hydrogen ephansi ekushiseleni, kanye nokusebenza kahle okuphezulu.Kuyindlela ekhethwayo yokwakhiwa kwamapayipi ezweni lami.
4. Isimiso esibalulekile se-MIG yokushisela okuzenzakalelayo
Emapayipini ahamba amabanga amade anobubanzi obungaphezu kuka-710mm nobukhulu bodonga olukhulu, ukuze kutholwe ukusebenza kahle kokwakhiwa okuphezulu kanye nekhwalithi ephezulu, ukushisela okuzenzakalelayo kwe-MIGA kuvame ukucatshangelwa kuqala.
Le ndlela isisetshenziswe iminyaka engu-25, futhi iye yaqashelwa kabanzi ngamapayipi anobubanzi obukhulu emhlabeni, okuhlanganisa namaqembu amapayipi asogwini nangaphansi kwamanzi, futhi ngokuvamile iyigugu eCanada, eYurophu, eMpumalanga Ephakathi nakwamanye amazwe nezifunda.
Isizathu esibalulekile sokuthi kungani le ndlela isetshenziswa kabanzi ukuthi izinga lokufakwa nokushisela lingaqinisekiswa, ikakhulukazi lapho kushiselwa amapayipi anamandla aphezulu.
Ngenxa yokuqukethwe kwe-hydrogen ephansi yale ndlela yokushisela, kanye nezidingo eziqinile ekubunjweni nasekukhiqizeni ucingo lokushisela, uma isidingo sokuqina siphezulu noma ipayipi isetshenziselwa ukuthutha imidiya ene-asidi, ukushisela amapayipi ensimbi asezingeni eliphezulu ngalokhu. indlela ingathola izinga lokushisela ezinzile.
Kuyaqapheleka ukuthi uma kuqhathaniswa ne-electrode arc welding, ukutshalwa kwezimali ohlelweni lokushisela i-arc yensimbi kukhulu, futhi izidingo zemishini nabasebenzi ziphezulu.Ukugcinwa okudingekayo okuthuthukisiwe kufanele kucatshangelwe, futhi izesekeli kanye negesi exubile ehlangabezana nezidingo zokuhlanzeka kufanele kucatshangelwe.hlinzeka.
Isikhathi sokuthumela: Jun-20-2023