Some pipelines need to change positions frequently, and some pipelines need to be equipped with various valves and instruments, which require flanges. The cost of flanges is usually higher than that of pipe fittings.
There are two major flange systems in the world: the American system and the European system. The American system is represented by ASME B16.5 and ASME B16.47. The European system is represented by BS EN 1092-1. China's national flange standards and industry flange standards basically adopt the above-mentioned flange standards. However, it should be noted that the flanges of the American system and the flanges of the European system cannot be used together.
The American system mainly including the following types of flanges: slip on flange, weld neck flange, lap joint flange, threaded flange, socket welding flange and blind flange. Weld neck flanges are often used for high pressure pipeline because it provides a complete penetrated welding bevel. Butt welding flanges are the main products of Guanghao company.
The raw materials of flanges are steel rods and ingots, and the raw materials are the most important for finished flanges. In some cases in the petrochemical industry, forged flanges cracked when they were welded to pipes, all due to the use of inferior raw materials to reduce costs. The raw materials used by Guanghao Company to make flanges are all provided by well-known domestic manufacturers. After the materials arriving at the factory, spectrum tests are carried out to analyze the chemical composition. During the forging process, the tensile test bar is made, which gets the heat treatment with the flange blank at the same time, and then their tensile properties are tested. Our duplex steel flanges are all made of round steel and ingots produced by Yongxing Special Steel, Tsingshan Group and Walsin Lihua, which ensures the excellent quality of the finished flanges.
In recent years, the extensive use of advanced automation equipment such as high-speed drilling machines and CNC lathes in our factory has greatly improved the production efficiency and processing accuracy of flanges. Especially the key parts like the flange sealing surface, such as the smoothness and precision of the ring connection surface, need special attention. Today, the machining workshops of Guanghao company have now achieved complete numerical control.
Guanghao company owns forging equipment, reaming equipment and a complete set of forging dies, thus ensuring that we can manufacture flanges and pipe fittings used for large-diameter pressure vessels.
Guanghao company owns heat treatment furnace, which can achieve the heat treatment processing of alloy steel flange blanks with the following materials such as: A182 F5/F9/F11/F12/F22/F91/F304L/F316L/F51/F53/F60, A694 F52/F60/F65, etc. So that to ensure the mechanical properties of the finished flange.
In addition to producing standard flanges, Guanghao company can manufacture non-standard flanges according to customer requirements. Our technical department can quickly provide CAD and Solidworks drawings.
For the exported flanges, each flange is covered with a plastic cap to protect the sealing surface to ensure that the flange sealing surface will not be scratched and bumped during transportation. At the same time, we will provide customers with product quality certificates and detailed packing lists that meet the requirements of EN 10204 3.1.
Guanghao company has a professional sales team to provide you with a complete set of piping system solutions. Feel free to contact us anytime.