Excise duty on manufactured goods used at plant site

 A company is engaged in the manufacture of Steel Ingots and Sariya. They recently bought a new machinery which required construction of a shed. The Sariya manufactured for sale was used within the factory for such construction. Is Excise Duty to be levied on the Sariya? If yes, is CenVat Credit allowed on such Excise Duty charged on the company by its own self?