Manufacturing Process

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The Pipes / tubes are then solution annealed, straightened, picked, passivated and polished before inspection and despatch.
Annealing : Annealing or heat treatment, of the tubes is carried out in fully automated and conveyor - equipped furnaces, with temperature recorders & controllers. It consists of heating the tubes to a specified temperature and immediate quenching in water thereafter.
Straightening : After the annealing operation, the tubes are straightened with a straightening machine. In addition to giving a high degree of straightness, the tubes are also rounded up during the operation.
Pickiling & Passivation
Pickling : It is the removal of any high temperature scale and any adjacent low chromium layer of metal from the surface of stainless steel by chemical means.
Passivation : It is the treatment of the surface of stainless steels, to remove contaminants and promote the formation of a continuous passive film on a freshly created surface.
Polishing : The excellent properties of Stainless Steel Tubes and Pipes, including their high aesthetic & hygienic value, low maintenance and high durability, has led to an increased demand for polished tubes and pipes in architecture, general engineering, dairy & food-processing sectors, among others. To meet such demands for high-quality externally polished tubes and pipes, Rajshree is equipped with a state-of-the-art-polishing machine. A range of finishes, from 120 grit up to mirror finish, is made available as per customer's requirement.

Advantages

Cold process offered simultaneously for the ID as well as the OD of the product.

Lesser heat treatments leading to better physical properties.

Uniform and excellent microstructure for all the products.

Dimension consistency spread over the total length of the product.

Good surface finish for the end product.

Applications

Chemicals

Pharmacy Industries

Automobile Industries

Paper & Pulp Industries

Water Piping System

Refinery Plant

Textile Industries