Minimum thickness of the head
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This post was last edited by zkbest on 2021-5-28 09:48. As shown in the figure, the thickness of the straight edges of the flange, s1, is less than s2 (where both S1 and S2 refer to the minimum thickness after shaping). According to the requirements of GB/T 25198, it is necessary to indicate the minimum forming thickness; should this thickness be denoted by s1 or s2?
Isn’t the head part integral? According to the minimum thickness of the two smallest values.
Integrated; the straight-edge sections are machined to be thinner in order to match the thickness of the cylinder body
Thinning is carried out at the curve of the head. The straight sections basically have no machined shoulder waves.
This post was last edited by zjq1962 on 2021-5-24 at 15:52. The greatest thickness reduction of the head occurs in the transition zone, and the maximum stress in the head is also located there; therefore, the minimum thickness of the head should be S2. S1 represents the thickness reduction required for mating with the cylinder, with this reduction being limited to the straight edges, and the thickness after reduction must still be at least as great as that of the adjacent cylinder.
It is neither S1 nor S2; it is a number that is still small.
S2 in the transition zone should have the minimum thickness
Due to the stresses acting on the head and the relevant calculation formulas, the minimum thickness of the head should be less than that of the cylinder; it is neither S1 nor S2, but rather an actual thickness that is even smaller
This post was last edited by wanlirn on 2021-5-26 at 11:33. It’s neither S1 nor S2; the original poster still has a misunderstanding regarding what a small end cap is
Why does a non-standard head still need to be fitted with a standard mark? If this is a forged piece, then isn’t the thickness the one indicated in the diagram? The required thicknesses have all been indicated; the thickness of each part is as specified in the diagram
It’s all indicated; the calculation formulas for straight segments and curved segments are different, so they need to be calculated separately. Special attention should be paid in cases of very high pressures