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PN10 DN200 Black Carbon Steel Flange

Black zinc plating is a type of metal surface treatment that provides oxidation resistance. It is particularly suitable for hardware products manufactured through processes such as machining, stamping, and die casting.During black zinc plating, a layer of zinc coating is applied to the metal surface. This zinc layer is then treated with a chromate solution, resulting in the formation of a passivation film with a rainbow coloration. The structure of this film is typically believed to consist of a complex mixture of basic chromium chromate, basic zinc chromate, chromium chromate, zinc chromate, and zinc and chromium oxides.The passivation treatment imparts a rainbow color to the zinc coating and significantly enhances its resistance to corrosion. This treatment is primarily used for protecting steel parts from corrosion.

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Our Company

Jin Runyuan Flange of Shandong Machinery Co., Ltd. is a professional manufacturer of forging flanges. The company is located in the renowned "township of the blacksmith" in Shandong Jinan Chapter Grave Area Set Street Agency Headquarters, offering convenient transportation and a beautiful environment. Established in 2001, the company covers an area of 20,000 square meters. Their main products include flanges of Japanese standard, American standard, and German standard. They can also customize products according to customer drawings or samples. With fixed assets worth 40 million and an annual output of 40 million tons, Jin Runyuan's flanges are highly regarded and widely trusted by customers in more than 20 countries and regions including Japan, the United States, Germany, South Korea, Russia, Brazil, and South Africa. The company has a strong technical force and professional experience, with advanced forging machinery processes, assembly, inspection, and packaging production lines. They have a team of 10 professional production and technical personnel, 120 frontline workers, E management personnel, and more than 20 packing and inspection personnel. Product quality meets national and international standards, and the company has obtained ISO9001-2000 quality management system certification, French classification society certification, China special equipment manufacturing license, and pressure vessel manufacturing license.

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Raw Material Blanking

PN10 Flanges GOST 12820-80