Izinhlobo zamapayipi
Amapayipi ahlukaniswa ngamaqembu amabili: amapayipi angenamthungo namapayipi ashiselwe, ngokusekelwe endleleni yokukhiqiza. Amapayipi angenamthungo akhiwa ngesinyathelo esisodwa ngesikhathi sokugoqwa, kodwa amapayipi agobile adinga inqubo yokushisela ngemva kokugoqwa. Amapayipi ahlanganisiwe angahlukaniswa abe yizinhlobo ezimbili ngenxa yokuma kwejoyinti: i-spiral welding kanye ne-welding eqondile. Nakuba kunenkulumo-mpikiswano ngokuthi amapayipi ensimbi angenamthungo angcono yini kunamapayipi ensimbi agobile, abakhiqizi bamapayipi angenamthungo nashikelwe bangakhiqiza amapayipi ensimbi anekhwalithi, athembekile, futhi aqinile ngokumelene nokugqwala okukhulu. Ukugxila okuyinhloko kufanele kube ekucacisweni kwesicelo kanye nezici zezindleko lapho kunqunywa uhlobo lwepayipi.

Ipayipi Elingenamthungo
ipayipi elingenamthungo ngokuvamile likhiqizwa ngezinyathelo eziyinkimbinkimbi eziqala ngokubhoboza okungenalutho kusuka ku-billet, umdwebo obandayo, nenqubo yokugoqa ebandayo. Ukulawula ububanzi obungaphandle nobukhulu bodonga, izilinganiso zohlobo olungenasici kunzima ukulawula uma kuqhathaniswa namapayipi ashiselwe, ukusebenza okubandayo kuthuthukisa izakhiwo zemishini nokubekezelelana. Inzuzo ebaluleke kakhulu yamapayipi angenamthungo ukuthi angenziwa ngokuqina kwezindonga ezinzima futhi ezinzima. Ngenxa yokuthi awekho ama-weld seams, angabhekwa njengezakhiwo ezingcono zemishini kanye nokumelana nokugqwala kunamapayipi ashiselwe. Ngaphezu kwalokho, amapayipi angenamthungo azoba ne-ovality engcono noma eyindilinga. Zivame ukusetshenziswa kangcono ezimweni ezinzima zemvelo ezifana nemithwalo ephezulu, ukucindezela okukhulu, nezimo ezigqwalile kakhulu.

Ipayipi elishiselwe
Ipayipi lensimbi elishiselwe lakhiwa ngokushisela ipuleti lensimbi eligoqiwe libe yisimo se-tubular kusetshenziswa ukuhlangana okuhlangene noma okuvunguzayo. Kuye ngobukhulu bangaphandle, ukushuba kodonga, kanye nokusetshenziswa, kunezindlela ezahlukene zokukhiqiza amapayipi ashiselwe. Indlela ngayinye iqala nge-billet eshisayo noma i-flat strip, esuke yenziwa amashubhu ngokwelula i-billet eshisayo, ihlanganisa imiphetho, futhi ivalwe nge-weld. Amapayipi angenamthungo anokubekezelela okuqinile kodwa ukujiya kodonga kuzacile kunamapayipi angenamthungo. Izikhathi ezimfushane zokulethwa nezindleko eziphansi zingase futhi zichaze ukuthi kungani amapayipi agobile engase ancanywe kunamapayipi angenamthungo. Kodwa-ke, ngenxa yokuthi ama-welds angaba izindawo ezizwelayo zokuqhekeka futhi kuholele ekuqhekekeni kwamapayipi, ukuqedwa kwezindawo zamapayipi angaphandle nangaphakathi kufanele kulawulwe ngesikhathi sokukhiqiza.