Thegiciye-mirgina sokin tsarishi ne wanda aka fi amfani da shi wajen samar da bututun ƙarfe maras sumul, kuma ’yan’uwa Mannesmann na Jamus ne suka ƙirƙira shi a shekara ta 1883. Na’ura mai yin birgima ta haɗa da na’ura mai jujjuya bi-biyu da na’ura mai jujjuya birki uku. Lalacewar ingancin capillary da aka samar ta hanyar mirginawa da huda bututu babu komai sun haɗa da ninki na ciki, ninki na waje, kaurin bango mara daidaituwa da kuma tarkacen saman capillary.

Rufewar capillary: Capillary ita ce lahani mafi kusantar faruwa a cikin jujjuyawar juzu'i, kuma yana da alaƙa da kusanci da aikin huda bututun, daidaita ma'aunin tsarin huda na injin fas ɗin huda, da ingancin huda. toshe Abubuwan da ke shafar shigar da capillary: ɗaya shine raguwa (ƙididdigar) da lokutan matsawa kafin filogi; ɗayan kuma shine siffar rami; na uku shine ingancin filogi.
Lankwasawa a waje na bututun capillary: Mafi yawan lanƙwasawa na waje na bututun capillary yana faruwa ne ta hanyar lahani na saman bututun, wanda shine wani lahani mai inganci na saman da ke haifar da sauƙi lokacin da bututun ya birgima kuma aka soke shi. Abubuwan da ke shafar capillary waje lankwasawa: A. tube blank plasticity da perforation nakasawa; B. tube blank surface lahani; C. Perforation kayan aiki ingancin da wucewa siffar.

Kaurin bango mara daidaituwa: Akwai kaurin bango mara daidaituwa da kaurin bango mara daidaituwa. Lokacin jujjuyawa da huda, kaurin bango mara daidaituwa yana iya faruwa. Babban abubuwan da ke shafar kaurin bango mara daidaituwa na bututun capillary sune: zafin dumama bututu mara kyau, tsakiyar ƙarshen bututu, daidaita tsarin rami na injin huda da siffar kayan aiki, da dai sauransu.

Rarraba saman saman: Ko da yake buƙatun ingancin ingancin bututun capillary mai raɗaɗi ba su da tsauri kamar na bututun birgima da ƙwanƙolin ƙira don ingancin bututun ƙarfe, tsantsar saman saman bututun capillary shima zai shafi ingancin bututun ƙarfe. Abubuwan da ke da alaƙa da ɓarnawar bututun capillary: galibi saboda saman kayan aikin ɓarna ko tebur ɗin abin nadi na injin huda yana sawa sosai, m ko tebur ɗin nadi baya juyawa. Don hana saman capillary daga lalacewa ta hanyar lahani na kayan aiki mai lalata, ya kamata a ƙarfafa dubawa da nika kayan aikin perforating (silinda jagora da trough).