Amapayipi ensimbi ekhabhoni ashiselwe zihlukaniswe ikakhulukazi izinqubo ezintathu: electric resistance welding (ERW), spiral submerged arc welding (SSAW) kanye ne-straight seam submerged arc welding (LSAW). Amapayipi e-carbon steel welded akhiqizwa yilezi zinqubo ezintathu anendawo yawo endaweni yokufaka isicelo ngenxa yezinto zawo zokusetshenziswa ezihlukene, izinqubo zokwakha, ubukhulu bezinga kanye nekhwalithi.

1. Ipayipi elishiselwe ukumelana nogesi (ERW)

Ipayipi elishiselwe ukumelana nogesi liwuhlobo lokuqala lwepayipi lensimbi elakhiqizwa ezweni lami, enohlu olubanzi kakhulu lwezicelo, inani elikhulu lamayunithi okukhiqiza (ngaphezu kuka-2,000), kanye nokukhishwa okuphezulu kakhulu (okubalwa cishe ku-80% wengqikithi yomthamo wokukhiqiza. wamapayipi ashiselwe). Ukucaciswa komkhiqizo yi-Ф20 ~ 610mm. wadlala indima ebalulekile. Kusukela ngeminyaka yawo-1980s, cishe amasethi angama-30 amayunithi e-ERW219-610mm angeniswe evela phesheya. Ngemva kweminyaka yokuzijwayeza ukukhiqiza, izinga lobuchwepheshe bemishini lenze inqubekelaphambili enkulu, futhi nekhwalithi yomkhiqizo nayo ithuthuka njalo. Ngenxa yokutshalwa kwezimali kwayo okuphansi, umphumela osheshayo kanye nobubanzi bezicelo ezibanzi, ithuthuke ngokushesha. Ngokuthuthukiswa kwenqubo yokukhiqiza ipuleti ye-CSP, ihlinzeka ngezindleko eziphansi, izinto ezingathembekile zekhwalithi, futhi idala izimo ezinhle zokuthuthuka kwayo esikhathini esizayo. Le ngxenye yemikhiqizo iye yathuthukiswa kusukela emkhakheni wokuthutha uketshezi kanye nesakhiwo kuya epayipini lomthombo kawoyela kanye nepayipi lolayini emkhakheni wokufakwa kwamapayipi angenamthungo.

2. Ipayipi elishiselwe i-arc elingaphansi kwe-Spiral (SSAW)

Ukutshalwa kwezimali kwemishini yepayipi elihlanganisiwe le-arc elihlanganisiwe lincane, ngoba ukusetshenziswa komugqa omncane oshibhile (ipuleti) ikhoyili eqhubekayo yokushisela ukukhiqiza ipayipi elishiselwe ububanzi obukhulu (Ф1016 ~ 3200mm), inqubo yokukhiqiza ilula, izindleko zokusebenza iphansi, futhi inenzuzo yokusebenza ngezindleko eziphansi. ipayipi elishiselwe uwoyela negesi lezwe lami lenze ifomethi eyisisekelo ngokuyinhloko esekelwe efektri yamapayipi ensimbi exhumene nesistimu ye-petroleum. Ukwamukela ubuchwepheshe obuseqophelweni eliphezulu njengokwakheka kwengcindezi eyinsalela ephansi kanye nokunwetshwa komshini wokuphela kwamapayipi, ikhwalithi yepayipi elishiselwe okuvunguzayo eliye lalawulwa ngokuqinile yikhwalithi liqhathaniswa nepayipi elishiselwe ngomthungo oqondile. Iwuhlobo lwamapayipi amakhulu asetshenziswa kumaphrojekthi wezwe lami amabanga amade wamapayipi kawoyela negesi. Umthamo wawo wokukhiqiza ukwazile ukuhlangabezana nezidingo zokwakhiwa kwamapayipi kawoyela negesi amabanga amade ezwe lami, futhi uthunyelwe emazweni angaphandle ngobuningi.

3. Umthungo oqondile wepayipi elishiselwe i-arc (LSAW)

I-Longitudinal submerged arc welding ubuchwepheshe bokwenza amapayipi obuthuthukisiwe obuthuthukiswe sekwedlule isikhathi ezweni lami, futhi ubuchwepheshe be-UOE babusetshenziswa kakhulu esikhathini esidlule. Eminyakeni yakamuva, i-JCOE ethuthuka kancane kancane isibe obunye ubuchwepheshe obusha obujwayelekile ezweni lami nasemhlabeni. Amapayipi ashiselwe i-arc angaphansi kwe-Longitudinal ayikhwalithi ethembekile futhi asetshenziswa kakhulu emigqeni yeziqu zikawoyela ezinengcindezi ephezulu negesi. Ngenxa yokutshalwa kwezimali okukhulu kwalolu phiko lwamapayipi ashiselwe, izinto zokusetshenziswa ezisetshenziswayo ziyipuleti elilodwa elibanzi futhi eliwugqinsi elinezindleko eziphakeme, inqubo iyinkimbinkimbi, ukusebenza kahle kokukhiqiza kuphansi, futhi izindleko zomkhiqizo ziphezulu.