HSAW bututu (spiral submerged baka welded bututu), shi ne mabe na zafi-birgima tsiri karfe da lankwasawa kafa bisa ga karkace, atomatik submerged baka waldi da za'ayi a cikin kabu da kuma waje kabu welded karkace kabu karfe bututu (wanda kuma aka sani da karkace welded bututu). , karkace bututu, karkace karfe bututu).Amma ga wadannan dalilai, shi ne yadu amfani a samar da manyan diamita karfe bututu:
1) canza siffar siffar, za ka iya amfani da wannan nisa tsiri samar daban-daban calibers karfe bututu;
2) saboda yana ci gaba da lankwasawa, tsawon tsayin bututun ƙarfe ba shi da iyaka;
3) Weld karkace-dimbin yawa uniform rarraba a kan kewaye da dukan karfe bututu, karfe bututu size, high daidaici, high tsanani;
4) mai sauƙi don canza girman da ya dace da ƙananan ƙananan ƙarfe na samar da bututu na nau'i mai yawa.

Karkace waldi kabu madaidaiciya tube tsawon, tube tsawon L, da weld tsawon ne L / cos (8).Na dogon lokaci muhawara game da karkace da madaidaiciyar bututu, musamman, wanda ya fi girma idan aka kwatanta da bututun ƙarfe na UOE.Karkace bututu masana'antu fasahar zuwa yau, ya kamata mu zama m da kuma daidai kimantawa da kwatanta, da ra'ayin 'dogon karkace weld.

Da farko, saboda lahani a cikin layi daya na weld, don bututun karkace, lahani na weld shine "lalacewar da aka saba".A lokacin amfani, babban danniya shugabanci na karfe bututu, bututu axis shugabanci na daidai lahani tsawon shi ne samll fiye da madaidaicin bututu yana da ƙananan;Abu na biyu, tun da bututun bututun ana birgima farantin, tasiri tauri babban anisotropy tare da mirgina shugabanci CVN darajar fiye da perpendicular zuwa mirgina shugabanci na CVN darajar sau uku mafi girma.Madaidaicin bututun bututun da ke fama da babban danniya shine daidai gwargwado ga jagorar juriya mafi ƙasƙanci mafi ƙasƙanci, yayin da karkace ita ce ta ɗora mafi ƙasƙanci a cikin bututun tasirin juriya, ta yadda karkace walda ke haifar da fa'ida.