[China Aluminum Network] The two-layer FBE coating system is composed of an FBE undercoat and a modified FBE top coat, which covers the surface of the bare steel tubes. The overall process for applying double-layer FBE is similar to that of standard FBE, with only minor adjustments in the layout of the spray chamber and spray guns. No advanced or complex equipment is required, making it cost-effective and easy to implement. The powder spray chambers are typically arranged in two separate units or as a single integrated unit, with each setup offering different dusting methods—either a dual-chamber spray process or a single-chamber spraying technique.
Laboratory tests and field applications have confirmed the excellent performance of the two-layer FBE coating system. When applied to underground steel pipelines, this system exhibits strong adhesion to the substrate, high resistance to cathodic disbondment, low water absorption, and superior thermal stability. One of its most notable advantages is the combination of the high bonding strength of standard FBE with the enhanced water resistance provided by the modified FBE layer. This makes it ideal for environments where corrosion and moisture exposure are significant concerns.
With the development of new materials, the welding process at the joint areas has become more flexible. A conventional mobile fluidized bed can be used, and the steel pipe can be heated locally using an induction heating device before being spray-bonded with FBE to cover the weld area. Alternatively, cold-applied coatings such as Parrott Pipe anti-corrosion paint from Parrot Corporation in the U.S. and ATO Super Pottery anti-corrosion paint from Korea Jingxing Industry Co., Ltd. can also be used on-site. These coatings have been tested by pipeline companies and show strong adhesion to FBE, with performance comparable to traditional FBE systems. They are easy to apply, making them a practical and efficient alternative for spot repairs and field applications.
In conclusion, the modified two-layer FBE anti-corrosion system offers performance comparable to three-layer coatings but with a much simpler application process. According to partial data, over a dozen single-layer FBE production lines have already been established nationwide. With minimal modifications, these lines can be upgraded to produce the modified two-layer FBE coating, significantly reducing costs while maintaining or even improving performance. Additionally, it helps prevent issues like cathodic protection shielding, which can enhance the overall effectiveness of pipeline corrosion protection. As a result, this system has the potential to elevate domestic pipeline anti-corrosion technology to a new level. With its cost-effectiveness, reliability, and ease of use, the modified two-layer FBE system is set to become a strong competitor in steel pipe corrosion protection projects across the industry.
The liquid inlet/outlet adopts a ceramic hard seal structure, the liquid is in contact with the ceramic throughout the entire process, and does not touch the stainless steel jacket. The ceramic parts of the liquid inlet/outlet can be disassembled for cleaning and disinfection like the ceramic plunger rod and the ceramic reversing rod, which completely solves the problem of cleaning the dead angle between the steel jacket and the ceramic.
Ceramic plunger pump,Micro ceramic plunger pump,Plunger pump
Changzhou Yuanwang Fluid Technology Co., Ltd. , https://www.ywfluid.com