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lined pipe, clad pipes, induction bends, Pipe Fittings - Piping System Solutions

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July 6, 2025

What is CRA clad or lined steel pipe?

What is CRA clad or lined steel pipe?

by admin / Monday, 03 July 2023 / Published in Material, Technology

CRA (Corrosion Resistant Alloy) clad or lined steel pipes are composite pipes designed to provide enhanced corrosion resistance and mechanical properties compared to traditional steel pipes. They are used in applications where the working environment is highly corrosive or demanding, such as oil and gas, petrochemical, and chemical industries.

In CRA clad or lined steel pipes, a layer of corrosion-resistant alloy (CRA) is either metallurgically bonded to the steel pipe (clad) or inserted as a liner inside the steel pipe (lined). The CRA layer provides excellent protection against corrosive media, while the steel pipe offers structural strength and support.

CRA Clad Steel Pipe

CRA clad steel pipes are manufactured by bonding a corrosion-resistant alloy layer onto a carbon steel or low-alloy steel base. This can be done through methods like hot rolling, explosive bonding, or weld overlay cladding. The resulting composite pipe has a strong metallurgical bond between the base material and the CRA layer, ensuring excellent durability and performance.

CRA Lined Steel Pipe

CRA lined steel pipes consist of a corrosion-resistant alloy liner inserted into a metallic outer pipe. The liner can be made from various corrosion-resistant materials, such as stainless steel, nickel alloys, or other specialized alloys depending on the application’s needs. The liner protects the outer pipe from corrosive media while maintaining the structural integrity of the overall piping system.

Applications of CRA Clad or Lined Steel Pipe

CRA clad or lined steel pipes are typically used in industries and applications where corrosion resistance is critical, such as:

  1. Oil and gas production and transportation systems, especially in sour service environments containing hydrogen sulfide (H2S) and carbon dioxide (CO2).
  2. Petrochemical processing facilities, where corrosive chemicals are used or produced.
  3. Chemical processing plants, which handle various corrosive media.
  4. Offshore platforms and subsea pipelines, where corrosive seawater and high pressures are present.
  5. Power generation facilities, where high temperatures and corrosive environments are encountered.

The choice between CRA clad or lined steel pipes depends on factors such as the specific application requirements, desired performance, budget constraints, and manufacturing methods available.

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