Elliptical head not only have heat exchange between powder and material, but also heat exchange between water and materials, but no matter which medium is different from the inside and outside of the equipment, such as erosion, rinsing and scaling, such as complex environment Wait. Wrinkling is more likely to occur if the bending resistance to the longitudinal direction of the panel is smaller. For example, if the medium has S- or Cl-, then the carbon steel will definitely have more serious erosion, and the stainless steel will also produce pitting or erosion between the nuclear stresses and cause cracking. This kind of situation will cause the operating cycle of the heat exchange equipment to be shortened. For example, the organic elliptical head needs to have a certain thickness under normal conditions, which requires multiple coatings and high temperature baking, so The entire construction process is still relatively complicated. The most important thing is that its temperature resistance is not very good, especially the elliptical head for the oil. It is necessary to use high-pressure steam for purging during each inspection, so it is easy to cause damage to the coating.

In the case of hot stamping, if the temperature of the slab material during heating is not uniform, the gap between the mold and the lower mold corner is too large, and the pressure edge is uneven, the bulge or wrinkles may be caused. The head is in the ellipsoid where it needs to be smooth and continuous through the curvature of the line, so the stress distribution must be sufficiently uniform. The head is in the ellipsoid where it needs to be smooth and continuous through the curvature of the line, so the stress distribution must be sufficiently uniform. The elliptical head is much smaller in depth than the hemispherical head, and it’s easier to stamp and form. It can be said that it is one of the more commonly used heads in medium and low pressure containers.

The materials for the manufacture of the head shall, in addition to complying with the relevant provisions of the following standards, comply with the requirements of the drawings or the ordering technical agreement;

a) Steel head according to GB150 or JB4732

b) Aluminum head according to JB/T4734

c) Titanium head according to JB/T4745

d) Copper head according to JB/T4755

e) Nickel and nickel alloy heads according to JB/T4756