Shanxi dingxiang thriving industry iron forging factory is located in the hometown of China's heavy chemical base in northwestern Shanxi Province forging dingxiang territory, railway transportation is convenient, coal, electric power, rich resources, advanced communication facilities and quick, is extremely advantageous geographical environment. Small make up today for you to popularize the use of large diameter flange and fasteners with characteristics.
Large diameter flange common flange has flat welding flange and butt weld ends. There is no large diameter threaded flange. In real production and sales, is much accounted for the proportion of flat welding products. Flat welding of large diameter flange and butt welding of large diameter flange structure and use of the range is different, can show the characteristics and advantages of also will be different, so when use should be used according to different range, ensure the flange play an important role. Large diameter of flat welding flange with poor rigidity, suitable for special occasions pressure p 4 mpa or less; Butt welding flange is also called the high neck flange, large rigidity, suitable for the occasion of high pressure and temperature.
Flange and fasteners
There are three kinds of flange sealing surface model: planar seal face, is suitable for the occasion of pressure is not high, medium non-toxic; Concave-convex sealing surface, suitable for pressure slightly higher occasion; Mortise sealing surface, suitable for flammable, explosive, toxic medium quality and high pressure. Large diameter flange collocation with fasteners used in application, the following said the application of the two characteristics: first is the mechanical properties of large diameter flange style should be along the rolling on the blank of after heat treatment to steal, to go to the location of the like this: if the blank is not more than 40 mm diameter, then there should be at the center of sampling; When the blank diameter greater than 40 mm in diameter of a quarter of the sampling for the center. Isometric double end studs and the whole threaded stud should be performed according to the number of performance test. Nut shall be carried out by batch hardness test; Special fasteners with raw materials should be material certificate of factory.
Fasteners is for fastening and widely application of mechanical parts are widely used all kinds of machinery, equipment, vehicles, ships, railways, Bridges, buildings, structures, tools, instruments, meters, and supplies such as above, you can see all kinds of fasteners. It is the characteristics of various specifications, different performance purposes, and standardization, seriation, generalization of the kind of degree is also very high.
For large diameter flange fasteners should be according to the number of sampling inspection after heat treatment, inspection results shall comply with the relevant provisions of, and shall ensure that the mechanical properties of the product is not lower than the performance of the sampling condition. Nominal pressure PN is not less than 10.0 MPa tube of big caliber flange with the stud should one by one according to JB4730-1994 "pressure vessel nondestructive inspection for magnetic particle inspection, finished product after inspection, there is no problem, and should accord with the requirement of secondary forging of large diameter flange.
Flange information, knowledge, know more, just to the shanxi dingxiang flourish iron forging factory!
