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Hot Rolled Pickled & Oiled (Hrpo)

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STEEL

In addition to our standard Hot Rolled Coils and Sheets, SHRINIDHI ISPAT provides Hot Rolled Pickled and Oiled (HRPO) Steel for applications requiring a cleaner surface and enhanced corrosion resistance.

SHRINIDHI ISPAT's Pickling and Oiling (P&O) line is a state-of-the-art facility designed to enhance the surface quality and corrosion resistance of hot-rolled steel. While specific details of the line might be proprietary, a general description would likely include the following elements:

Pickling Process : The line utilizes a pickling process, typically involving immersion in a series of hydrochloric acid baths at controlled temperatures and concentrations. This process effectively removes mill scale, the oxide layer that forms on the surface of hot-rolled steel during the rolling process.

Rinsing Stages : After pickling, the steel undergoes thorough rinsing stages to remove any residual acid and prevent further chemical reactions.

Oiling Application : Following the rinsing process, a thin layer of oil is applied to the steel surface. This oil coating provides a protective barrier against corrosion, preventing rust formation during storage and transportation.

Drying Section : The oiled steel then passes through a drying section to remove excess oil and ensure a uniform coating.

Quality Control : Stringent quality control measures are implemented throughout the P&O process. This includes checks on the pickling solution concentration, temperature, rinsing effectiveness, oil application uniformity, and the final surface quality of the steel.

Capacity and Efficiency : The P&O line is designed for efficient and high-volume processing, enabling SHRINIDHI ISPAT to meet customer demand for pickled and oiled steel products.

SHRINIDHI ISPAT offers the following HRPO steel products:
ProductThickness (mm)Width (mm)Length (mm)Coil Weight (tons)
HRPO Steel Coils1.2 - 25Up to 2050N/AUp to 25
HRPO Steel Sheets1.2 - 25Up to 2050Up to 12000N/A
Advantages of HRPO Steel :

Hot Rolled Pickled and Oiled (HRPO) steel offers several distinct advantages over standard hot-rolled steel, making it a preferred choice for various applications. Here's a breakdown :

Improved Surface Quality
  • Removal of Mill Scale: The pickling process effectively removes mill scale, the oxide layer that forms on the surface of hot-rolled steel during the rolling process. This results in a cleaner, smoother surface.
  • Enhanced Surface Uniformity: Pickling creates a more uniform surface, which is beneficial for subsequent processing and finishing operations.
Enhanced Corrosion Resistance
  • Oiling Protection: The application of oil after pickling provides a protective barrier against moisture and other corrosive elements, significantly reducing the risk of rust formation during storage and transportation.
  • Improved Paint Adhesion: The clean, oil-coated surface of HRPO steel provides an excellent base for paint or other coatings, enhancing their adhesion and durability.
Enhanced Formability and Workability
  • Reduced Abrasiveness: The removal of mill scale reduces the abrasiveness of the steel surface, which can improve tool life and reduce wear during forming and fabrication processes.
  • Improved Weldability: The clean surface of HRPO steel facilitates welding, resulting in stronger and more consistent welds.
Improved Aesthetic Appearance
  • Cleaner Look: The absence of mill scale gives HRPO steel a cleaner, more aesthetically pleasing appearance, which is important for applications where visual appeal is a consideration.
Ready for Further Processing
  • Reduced Preparation Time: HRPO steel is essentially ready for further processing, such as cold rolling, forming, or coating, without the need for additional surface preparation. This can save time and reduce production costs.
Applications Where HRPO Steel is Preferred :

Hot Rolled Pickled and Oiled (HRPO) steel is valued for its clean surface and enhanced corrosion resistance, making it suitable for a range of applications where surface quality and durability are important. Here are some key applications :

Automotive Industry
  • Exterior Body Panels: HRPO steel is used for car body panels due to its smooth surface, which provides a good base for painting and finishing.
  • Interior Components: It's also used for various interior parts where a clean, rust-resistant surface is needed.
  • Structural Components: Some less visible structural parts also use HRPO steel.
Appliance Manufacturing
  • Washing Machines, Refrigerators, and Dishwashers: HRPO steel is used for the outer casings and internal components of appliances, providing a smooth, corrosion-resistant surface.
  • Other Home Appliances: It's used in the production of various other appliances where a clean and durable surface is required.
Furniture Manufacturing
  • Office Furniture: HRPO steel is used for desks, cabinets, and other office furniture, providing a smooth and aesthetically pleasing surface.
  • Household Furniture: It's also used in the production of various household furniture items.
General Fabrication
  • Cabinets and Enclosures: HRPO steel is used for electrical cabinets, control panels, and other enclosures where a clean and corrosion-resistant surface is important.
  • Shelving and Racking: It's used for shelving and racking systems in warehouses and retail stores.
  • Lighting Fixtures: HRPO steel is used for the production of lighting fixtures due to its smooth surface and corrosion resistance.
  • Metal Furniture and Fixtures: used in a wide range of metal furniture applications.
Other Applications
  • Construction Components: In some cases, HRPO steel is used for construction components where a clean and corrosion-resistant surface is required.
  • Containers and Packaging: certain types of containers and specialized packaging.
  • Any application requiring a clean, oil-coated surface: where mill scale removal is necessary for further processing or aesthetic reasons.

In essence, HRPO steel provides a higher-quality starting material compared to standard hot-rolled steel, leading to improved product quality, reduced processing costs, and enhanced durability.

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