The cold drawn square pipe has good stability and is a composite structure. Ihindurangero Hagati niIvanga Bya iyi Imiterere i Kuri.kare ni OYA Kuri in i Ubuso Bya Ibitangazamakuru, A Kwaguranya, kare Imirongo OYA Kuri Nyuma Koresha na Kwagura i Serivisi Ubuzima Bya i Sisitemu.