Weld neck flanges including long weld neck flange, flange with neck butt welding face, neck weld neck flange product, etc. it is mainly suitable for Uffalan and pipe welding, its structure is reasonable, the strength and stiffness is larger, can withstand high temperature, high pressure and repeated bending and temperature fluctuations, and its sealing performance is reliable, the nominal pressure is 0.25~2.5MPa weld neck flange with concave-convex seal surface. In layman’s terms, the weld neck flange is a flange with a neck and a circular tube that is connected with the pipe butt welding. weld neck flange is a flange pipe fittings, in different fields and industries are widely used and promoted, it applies in the use of different range, the need to use the environment is different, need to be used in accordance with certain conditions. The basic process of forging flanges: Forging flanges in the free forging, the shape of the forging is through some basic deformation process to gradually forge the billet. The basic process of free forging is upsetting, pulling length, punching, bending and cutting. The following are several processes for forging flanges: 1. A forging process that bends the billet to a certain angle or shape. 2. Cutting the forging process of dividing blank or removing material head. 3. Upsetting upsetting is the operation process of forging the original billet along the axial direction, so as to reduce the height and enlarge the cross-section. This process is often used for forging gear blanks and other disc type forgings. Upsetting is divided into all upsetting and local forging coarse two kinds. 4. Twist the forging process to rotate a part of the billet to a certain angle relative to the other part. 5. Long drawing is the length of the billet increase, the reduction of the section of the forging process, usually used for the production of shaft parts, such as lathe spindle, connecting rod and so on. 6. Punching punches the forging process through holes or through holes in the blanks. Welding flange not only saves space, but also reduces the weight, more important is to ensure that the joint site will not leak, with good sealing performance. The size of the compact flange decreases because the diameter of the seal is reduced, which reduces the cross-section of the seal surface. Second, the flange gasket has been replaced by a seal ring to ensure that the seal faces match. As a result, it takes only a little pressure to press the cover tightly. As the required pressure decreases, the size of the bolt and the required quantity can be reduced correspondingly, so a new product is designed, which is small in size and lightweight (lighter than the weight of the traditional flange $number). Therefore, welding flange is a relatively high-quality flange products, reduce the quality and space, the industrial use played a very important role.
we have our own pipe fitting factory since 1998 ,which covers 100 acres. In 1998, we invested and set up a new flange factory. Up to now, we have a complete production system, and become a professional and competitive group in this field.