CRA (Korrosionsbeständige Legierung) Bei plattierten oder ausgekleideten Stahlrohren handelt es sich um Verbundrohre, die im Vergleich zu herkömmlichen Stahlrohren eine verbesserte Korrosionsbeständigkeit und mechanische Eigenschaften bieten. They are used in applications where the working environment is highly corrosive or demanding, wie Öl und Gas, Petrochemie, und chemische Industrie.
in CRA clad or lined steel pipes, a layer of corrosion-resistant alloy (CRA) is either metallurgically bonded to the steel pipe (Gekleidet) 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 Warmwalzen, explosive Bindung, oder Overlay-Verkleidungen anschweißen. The resulting composite pipe has a strong metallurgische Bindung 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, wie zum Beispiel Edelstahl, nickel-Legierungen, 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.
Anwendungen von CRA Clad or Lined Steel Pipe
CRA clad or lined steel pipes are typically used in industries and applications where corrosion resistance is critical, wie:
- Oil and gas production and transportation systems, especially in sour service environments containing hydrogen sulfide (H2S) and carbon dioxide (CO2).
- Petrochemical processing facilities, where corrosive chemicals are used or produced.
- chemische Verarbeitungsanlagen, which handle various corrosive media.
- Offshore platforms and subsea pipelines, where corrosive seawater and high pressures are present.
- Energieerzeugungsanlagen, 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, Budgetbeschränkungen, and manufacturing methods available.
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