FIELD: chemical and heat treatment. SUBSTANCE: unit for application of coatings is made in form of furnace accommodating muffle and supports. Unit has holder located in furnace and muffle and made in form of vertical rod with upper and lower distributing flanges with fitting sockets intended for installation of plugs and lugs meant for interaction with supports. Blower is installed in furnace lower part. Muffle is assembly structure. Heat protective plug is attached to vertical rod. Furnace of induction type. Fitting sockets of upper distributing flange and upper plug surfaces are spherical and may interact with one another. EFFECT: higher efficiency of process equipment and simultaneous high quality application of coatings to pipe inner surfaces operating under conditions of intensive wear. 5 cl, 7 dwg
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