ElCidCampeador
Mechanical
- May 14, 2015
- 269
Suppose that you have a flat head (welded to a vessel) which complies with condition UG-39 (d)(1). The head has an opening with diameter < (head diameter/2), as prescribed in the condition. Following the ASME, I have to use formula UG-34 (c)(2)(1), replacing the value of C with 2C or 0.5, whichever is less (the case is sketch (b-2), figure UG-34). But in this formula, does not appear the inside diameter of the opening. How is it possible? Does this mean that all the openings with inside diameter < (Head diam./2), according to these conditions, shall require all the same thickness for the flat head? I mean, if I had a small hole, the reinforcement should be lesser than the case of bigger holes. Am I wrong? Thanks