Large diameter national standard non-standard flange manufacturer-WUXI HUAYI FLANGE CO., LTD.

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Large diameter national standard non-standard flange manufacturer

Release time:

2019-08-12

The production and implementation standards of large-diameter non-standard special-shaped flanges are generally reflected in the drawings provided by customers. The pressure rating, material, standard, etc. of the special-shaped flange have different characteristics and characteristics. They are used in accordance with certain principles and methods and methods in use, and can be produced and processed in accordance with the corresponding standards to ensure that they have good use value in use. And role. Special-shaped flange pressure rating: 0 .. 6Mpa ~ 32Mpa(150Lb ~ 2500Lb) Special-shaped flange has different production standards in use and production. Production and use according to corresponding standards can ensure the use value and function of special-shaped flange in practice. This sealing surface is dedicated to cooperate with a solid metal gasket machined from a metal material into an octagonal or oval shape to achieve a sealed connection. Since the metal ring gasket can be based on the inherent characteristics of various metals, the sealing performance of this sealing surface is good, and the installation requirements are not too strict. It is suitable for high temperature and high pressure conditions, but the sealing surface has high processing accuracy. Under normal circumstances, the special-shaped flange is always divided into several arc segments for processing. First, the blank is forged into a square billet, then cold bent into an arc section, annealed to relieve stress heat treatment, put together into a whole circle on the vertical car to process to the designed shape and size, and finally transported to the construction site, and then several arc sections are welded into a complete special-shaped flange and welded with the pressure vessel. Free forging has low productivity and large machining allowance, but the tools are simple and versatile, so it is widely used in forging single-piece and small batch production of forgings with simple shape. Free forging equipment includes air hammer, steam-air hammer and hydraulic press, which are suitable for the production of small, medium and large forgings respectively. Die forging has high productivity, simple operation, and easy realization of mechanization and automation. Die forgings have high dimensional accuracy, small machining allowance, and more reasonable fiber structure distribution of forgings, which can further improve the service life of parts. The basic process of free forging: When free forging, the shape of the forging is gradually forged by some basic deformation processes. The basic processes of free forging are upsetting, drawing, punching, bending and cutting. 1. Upsetting upsetting is the operation process of forging the original blank along the axial direction to reduce its height and increase its cross section. This process is often used for forging gear blanks and other disc-shaped forgings. Upsetting is divided into two types: all upsetting and local forging. 2. Pull long is to increase the length of the blank, cross-section to reduce the forging process, usually used to produce shaft parts blank, such as lathe spindle, connecting rod and so on.