We Super Steel Manufacturing Co.,Ltd(SMC) are amongst the top manufacturers and suppliers for the seamless steel pipe, welded steel pipe, OCTG products and fittings from China. We have been manufacturing and supplying these products to the industry since 1993, and received repeat orders and appreciation from our valued customers.
High quality piping products from approved manufacturers.
In order to continuously improve our offerings to our clients, we have consistently improved and upgraded our manufacturing facility and can hence offer material with stringent requirements.
Over the years, Super Steel Manufacturing Co.,Ltd(SMC) has developed an enviable reputation for project management for the Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical and other heavy industries.
The many years of experience that we have means that there is always someone who has the ability to carry a project forward.
Always up to date. In this column you can find the steel pipe related articles, including industry trends, product standards and materials, and some technical guidelines.
In the pipeline anti-corrosion process, the surface treatment of LSAW steel pipes is a key factor in determining the longevity of the anti-corrosion layer and ensuring a strong bond with the pipe. Research from professional organizations indicates that while the lifespan of the coating depends on factors like coating type, quality, and environmental conditions during application, approximately 50% of the coating’s longevity relies on proper surface treatment. Therefore, it is essential to adhere strictly to standard surface treatment requirements for LSAW steel pipes. The main rust removal methods for LSAW steel pipes are as follows.
Solvent or Emulsion Cleaning:
This method uses solvents or emulsions to clean the steel surface of oil, grease, dust, and lubricants. However, it does not remove rust, oxide layers, or welding residues, so it is generally used as a supplementary process.
Pickling:
Pickling typically involves chemical or electrolytic processes. In pipeline anti-corrosion work, chemical pickling is preferred to remove oxides, rust, and old coatings, sometimes followed by sandblasting for further treatment. Chemical cleaning can achieve a certain level of surface cleanliness and roughness, but it often results in a light anchor pattern and may impact the surrounding environment.
Hand and Power Tool Cleaning:
This method uses tools such as wire brushes to polish the steel surface, removing loose oxides, rust, and welding slag. Manual tool cleaning can reach the SA2 level, while power tools can achieve SA3. However, if the surface oxide scale is tightly bonded, tools may not produce the required anchor pattern depth for optimal corrosion resistance.
Abrasive Blasting:
This process, powered by high-speed rotating blades, projects abrasive materials (e.g., steel shot, grit, mineral particles) onto the steel surface with strong centrifugal force. Abrasive blasting not only removes oxides, rust, and contaminants but also creates a uniform surface roughness. This roughened surface enhances physical adhesion and increases the mechanical bond between the anti-corrosion layer and the pipe surface.
Abrasive blasting is considered the ideal method for anti-corrosion preparation. Generally, shot peening is used for internal surfaces, while shot blasting is applied to external surfaces of LSAW pipes. The rust removal process must strictly follow technical specifications to prevent rework or surface damage. Proper surface treatment not only ensures a smoother finish but also enhances durability, making it a preferred technique in the steel industry.
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