对GB150《压力容器》有关内容的商榷——内、外压锥形封头和变径段设计

Deliberation of Some Contents in GB 150 “Pressure Vessel”—— Design of Conical Heads and Sections

GB 150对内压锥壳的设计既引自原ASMEⅧ-2,又引自现ASMEⅧ-1并略有调整,对外压锥壳的设计基本上引自原ASMEⅧ-1,但对内压或外压锥壳上折边设置的判定要求都相同。从而不仅从表面上看似和ASME规范相同,但由于并未正确引用或作了和规范不一致的修改,使在实际执行中难以操作,且设计结果和ASME规范不相一致。文章根据ASME规范的制订依据,对GB 150所存在的问题逐一分析。

In GB 150, the design method for internal pressure conical shell is referenced from not only ASME VIII-2 but also ASME VIII-1, from which the method in GB 150 has a little differences somewhere. And for external pressure conical shell, the design method in GB 150 is also from ASME VIII-1. In two methods, the determinations of whether knuckle is necessary are the same. The design methods for conical shells look like that in ASME code, but because inappropriate changes existed, they are difficult to be applied in practice and the results from these methods are not similar with that from ASME code. In this paper, based on the principle to form the methods in ASME code, the problems existed in the methods in GB 150 were analyzed, respectively.