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In delayed coking units, the coke drum is one of the most critical pieces of equipment, continuously subjected to extreme conditions including high temperatures, pressure, and corrosive media. Common issues like drum bulging, weld cracking, and wall thinning significantly threaten the safety and stability of the entire operation. To address these challenges, 410S stainless steel clad plate has emerged as a preferred material solution for the internal lining of coke drums.
The operating environment inside a coke drum is exceptionally harsh. Sulfur and acidic compounds in the feedstock cause severe corrosion to the drum wall, particularly in the vapor phase and foam layer regions. This corrosion leads to wall thinning and can potentially cause leaks. Furthermore, the drum undergoes drastic thermal cycling with each operational cycle, exacerbating material degradation through thermal fatigue.
While traditional materials like carbon or chromium-molybdenum steels offer good structural strength and heat resistance, they are inadequate against corrosion. Simply increasing wall thickness or using higher-grade alloys leads to a significant cost increase. Therefore, a solution that is both corrosion-resistant and cost-effective is urgently needed.
410S is a low-carbon martensitic stainless steel known for its good corrosion resistance and workability. As the cladding material in a clad plate, it is metallurgically bonded to a carbon or Cr-Mo steel backing plate via rolling or explosion welding, creating a structure that combines strength with corrosion protection.
Excellent Corrosion Resistance: The chromium content in 410S forms a dense oxide layer, effectively resisting attack from high-temperature sulfur and naphthenic acids.
Matched Thermal Expansion: The cladding and backing plate have similar coefficients of thermal expansion, minimizing the risk of delamination under severe thermal cycling and ensuring long-term reliability.
Cost-Effectiveness: Clad plate offers the corrosion performance of stainless steel at a fraction of the cost of solid alloy construction.
Proven Technology: 410S clad plate has a well-established track record and mature welding procedures, simplifying fabrication and maintenance.
In practice, 410S clad plate is ideally suited for the most corrosion-prone areas of the coke drum, such as the top shell course, foam layer, and cone section. These areas are in direct contact with hot vapors and corrosive fluids, demanding the highest level of corrosion resistance. Implementing a clad construction significantly extends equipment service life and reduces the frequency of shutdowns for repairs.
Furthermore, the use of 410S clad plate aligns with the industry trend towards larger units and longer run lengths. As drum sizes increase, the demands for reliability and economy become greater, making 410S clad plate a strategically sound choice.
Nanjing Fugo New Material Tech Co., Ltd. (Fugo Tech) is an ISO 9001 and PED certified manufacturer specializing in Clad Plates and Machined Components (tube sheet, baffle plate, and dish head).
Our expertise extends to cutting-edge clad plate supplier capabilities, where we utilize controlled detonation techniques to create seamless molecular bonds between dissimilar metals, ensuring unmatched durability and thermal performance. Beyond plate manufacturing, we offer integrated head forming services, shaping clad materials into precision hemispherical or elliptical heads for pressure vessels and reactors. Pioneering unique material combinations, we also produce titanium clad copper composites that merge titanium's corrosion resistance with copper's superior conductivity, ideal for specialized electrical and marine applications.
For any new requirement, please contact: sales@fugo-tech.com
Fugo Tech is focused on the manufacturing of clad metal plate and distributes the Stainless Steel, Titanium, Nickel Alloy, Zirconium and other non-ferrous metal pipes, fittings, flanges, and fasteners.
