Mofuthu oa ho qoelisa oa flange o nka seaparo sa tšepe se sa hloekang, phofo e fetotsoeng ea magnesium oxide, terata e sebetsang e phahameng ea nickel-chromium electrothermal alloy le lisebelisoa tse ling. Letoto lena la futhumatsang metsi a tubular le ka sebelisoa haholo ho futhumatsa metsi, oli, moea, tharollo ea nitrate, tharollo ea asiti, tharollo ea alkali le lisebelisoa tse tlase tse qhibilihang (aluminium, zinki, tin, alloy ea Babbitt). E na le ts'ebetso e ntle ea ho futhumatsa, mocheso o ts'oanang, ho hanyetsa mocheso o phahameng, ho hanyetsa kutu le ts'ebetso e ntle ea polokeho.