The large-diameter flange is one of the flanges. The large-diameter flange has common flat-welded flanges and butt-welded flanges.
In the actual production and sales, or flat welding products accounted for a large proportion. Flat-welded large-diameter flange and butt welded large-diameter flange structure and use of different range, to show the characteristics and advantages will be different, so when used to different ranges to ensure that the flange play an important role .
Large diameter flat welding flange less steel, suitable for pressure p ≤ 4MPa occasions; also known as welded flange flange, more rigid, suitable for high pressure and temperature applications.
Large diameter flange in the machinery industry, chemical industry, wind power industry, sewage treatment industry in the widespread use and promotion, users get the praise and favor.
Flat welded steel flange for nominal pressure not exceeding 2.5MPa carbon steel pipe connections. Flat welding flange sealing surface can be made of smooth, bump and tongue and groove three. Smooth flat welding flange applications The largest amount, more for medium conditions more moderate circumstances, such as low-pressure non-purified compressed air, low pressure circulating water, which has the advantage of cheaper prices.Flat welding flange not only saves space and reduce weight, more importantly, ensure Joint parts will not leak, with good sealing performance.
The reduced size of the compact flange, the breathing valve is due to the reduced diameter of the seal, which will reduce the cross section of the sealing surface. Second, the flange gasket has been replaced by a sealing ring to ensure that the sealing face matches the sealing surface. As a result, only a small amount of pressure is required to compress the sealing surface.
Flat flange welding flange for the pipe and the counterpart welding, and its reasonable structure, strength and rigidity, withstand high temperature and high pressure and repeated bending and temperature fluctuations, reliable sealing Nominal pressure of 0.25 ~ 2.5MPa butt welding Flange with concave sealing surface.