Nkenkwà ukwu nwere mgbidiOnye otu ọkpọkọ na-ejikọta nwere eriri aka nwere ụdị arc, nke e ji mara n'ihi na enwere njikọ kwụwara n'etiti n'ikpere aka gbagọrọ agbagọ.A na-eji ígwè nkedo, igwe anaghị agba nchara, ígwè alloy, ígwè nkedo calcinable, carbon ígwè, ọla ndị na-abụghị ígwè na rọba.Dị ka usoro mmepụta si dị, ọ nwere ike kewaa n'ime: ịgbado ọkụ elbows, ịkụ ọkpọ, nkedo elbows, wdg Ụzọ e si ejikọta elbows gbara ọkpụrụkpụ na ọkpọkọ bụ: kpọmkwem ịgbado ọkụ (na-ejikarị) flange nkwonkwo, threaded nkwonkwo, na. oghere ụdị nkwonkwo.

Ihe owuwu ikpere ụkwụ nke gbara ọkpụrụkpụ bụ ihe ezi uche dị na ya, sistemụ ọkpọkọ nwere ike mesie ike, sistemu ọkpọkọ nwere ike ime ka ọ dị mfe, ọrụ ahụ dabara adaba, enwere ike ịchekwa ego ahụ, ibelata nguzogide ọkpọkọ, enwere ike melite nhazi ọkpọkọ, Enwere ike ibelata ọnụ ahịa ọrụ, nkesa ikuku ikuku nwere ike ịhazi ya, ma belata ọkpọkọ.Vibration ma hụ na arụ ọrụ akụrụngwa na ọkpọkọ dị mma.Dịka usoro mmepụta ihe si dị, enwere ike kewaa ya n'ime: ịgbado ọkụ n'ikpere, ịkụ ọkpọ, nkedo elbows, wdg.