Manufacturer long - term supply of Q245R oval head

1. Requirements for large oval head assembly; Before forming, the weld residual height that hinders the forming of the head shall be polished to make it flush with the base material. It is recommended to adopt the requirements of "the thickness of the weld after polishing shall not be less than the designed thickness" and "the surface of the weld after polishing shall be allowed to be lower than the surface of the base material, but not more than 0.8mm".

2. Elliptic head is common at medium pressure, and the rotary head is usually the head with large diameter. First of all, what is the difference between stamping head and spinning head: good stamping forming, breaking field of the head, good size guarantee, but suitable for small head. Spin forming difference, especially in the R section. Uneven thickness.

3. The metal in the heating region of the ellipse head cannot expand freely because it is cut off by the metal in the surrounding lower temperature. After cooling, the head can not shrink freely because of the surrounding metal. The result is that the heated metal has tensile stress and the other metal has compressive stress. When these stresses exceed the yield limit of the metal, the production will be sealed and deformed. Cracks occur when the metal arch limit is exceeded.

4. The depth of oval head is between hemispherical head and dish head, and the requirements for stamping equipment and mould and the manufacturing difficulty, the oval head is easier than the hemisphere head and harder than the dish head. In recent years, it is convenient to make large diameter elliptic head by using spinning process. Elliptical head is widely used in medium and low pressure vessels because of its good comprehensive performance.