Patching of External Coatings for Duplex Stainless Steel Pipe

External coating repair refers to the pipeline outside the coating caused by the construction of local damage and handling and other factors caused by the modification of the damage, including the pipe joints outside the construction of the coating and damage repair. The standard for repair shall not be less than the relevant standard of the technical specification. The external coating of the duplex stainless steel pipe shall be made intact, the stainless steel pipe is not allowed to be exposed or the coating is clearly thinned due to damage, or the coating is not tightly adherent. Once the steel pipe is exposed, it is necessary to carefully remove the rust and dirt from the exposed area, remove it with wire or other means, and repair it after being sure that it is clean and dry. Repair the first use of approved quick-drying paint backing, those embedded in the coating of small stones should be picked out, and then localized with a spray gun coating, with a repair knife to repair the coating flat, if necessary, add the outer coating. The use of anti-corrosion tape anti-corrosion parts of the repair should be stripped of the injury site, coated with primer, and the use of the same tape, repair the overlap width must be greater than 100 mm damaged parts.Hunan Great Steel Pipe Co.,Ltd is a world-class production and service provider of submerged arc straight seam welded pipe as the first subsidiary of Shinestar Group. Hunan Great Steel Pipe Co.,Ltd pays more attention to in the pipeline engineering research areas as a pioneer of China Petroleum Pipeline & Gas Pipeline Science Research Institute, Such as: the use of oil and gas pipelines, pipe welding technology innovation, high-end plumbing materials research and development, as well as special tools technological innovation pipeline construction, pipeline corrosion protection science and technology research, science and technology research pipeline non-destructive testing, pipeline quality assessment, and research pipeline standards and so on. In the future, we will try to use new technology to create new business value and to contribute to research and product development for the pipeline.

Quality products as competitiveness of Hunan Great Steel Pipe Co.,Ltd. Our main products include: carbon steel seamless pipe, carbon steel welded pipe, stainless steel pipe, pipe fittings, which is variety types and full range specifications, moreover, strictly in accordance with international standards, like: ISO certification, API certification, CE certification. At the same time, we are able to offer value-added steel services, including: hot dip galvanized, anti-corrosion treatment, pipe cutting, or other customized services.

So far, the quantities of export products from Hunan Great Steel Pipe Co.,Ltd has been up to 10 million tons covering more than 100 countries or regions, and are widely used in aviation, aerospace, defense equipment, oil exploration, engineering machinery, automobile, railway, rolling stock, new energy and other industries. Currently, Hunan Great Steel Pipe has been successfully involved in many welded pipe project and even become a professional products specialist in the global.

Hunan Great Steel Pipe Co.,Ltd is a world-class production and service provider of submerged arc straight seam welded pipe as the first subsidiary of Shinestar Group.