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Haiyan pipe fittings manufacturing Co., Ltd., formerly known as the state-owned Zhejiang Haiyan pipe fittings factory, has nearly 30 years of production history of hydraulic pipe joints. With strong technical force in design, development and production, it has successively drafted and formulated gb3733.1 ~ 3765-83 ferrule type pipe joint, GB / t8606-2003 hydraulic quick change joint screw connection size and technical requirements, GB / t5861-2003 / iso7241:2000 hydraulic quick change joint test method, GB / t19674.1-2005 hydraulic pipe joint screw oil port, GB / t19674.2-2005 hydraulic pipe joint screw packing seal column end (type A and B GB / t19674.3-2005 screw metal to metal seal column end (type b) for hydraulic pipe joint and other national standards. The company specializes in the production of ferrule type (Q / hh3000 Series), welding type (Q / hh4000 Series), flared type (Q / hh5000 Series), steel wire braided hose assembly (Q / hh6000 Series) industrial pipeline fluid connector products, with an annual production capacity of 28 million pieces. All kinds of pipe fittings produced by the company are made of high-quality carbon steel, straight joint is made of cold drawn section steel, and right angle, three-way and four-way are all made of die forging blank, which fundamentally avoids the leakage caused by air hole and sand hole that are easy to appear in casting, and also changes the unsightly defects of block shape. The compression nuts are all made of cold extrusion technology, which improves the tensile strength of the material (internal thread). At the same time, the copper and stainless steel pipe joints produced by the company have also been widely used in the export products and flow production lines of Xi'an high voltage switch plant, Qinshan nuclear power company, Shanghai Volkswagen Company and other enterprises. The heat treatment of the ferrule adopts the process of Carbonitriding (cyaniding). The surface is hard and the core is soft, which guarantees the special performance requirements of the ferrule's cutting depth, easy elastic deformation and no cracking. Since the company began to produce pipe joints in 1978, after more than 20 years of efforts, the products are not only widely used in machine tools, automobiles, construction machinery, agricultural machinery, plastic machinery, ships and military industries, but also through German Benz, Neoplan, American John Deere, Austrian Steyr, Czech tetera, kesbauer, yilisar and other companies in China Supporting certification of enterprises. Some products are exported to the United States, Britain, Germany, Hong Kong and Taiwan. The company is located on the Bank of Hangzhou Bay, the coast of the East China Sea, 110km away from Shanghai in the north and 90km away from Hangzhou in the south. It covers an area of 13200 square meters and a building area of 7200 square meters. It has six branches, including machinery, cold extrusion, hot die forging, hose assembly, heat treatment and small tube parts, with a total number of 206 people, including 28 engineering technicians. It has 138 sets of various machinery and forging equipment. Among them, there are 45 sets of CNC systems in Spain and Japan. It has static pressure, blasting, pulse, vibration test center and measurement physical and chemical test center. Good equipment, strong technical force, perfect detection means, stable product quality, complete specifications and varieties. The company passed the ISO9002-94 international quality assurance system certification in 2000, and passed the ISO9001-2000 international quality management system certification for the third time in 2005.

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