Abstract： GB 150 and GB/T 151 are two leading standards for design and fabrication of pressure vessels,in which calculation methods for 8 types of pressurized shells and 4 types of tube sheets are listed.Calculation formulae for these compo- nents are derived from elastic analysis for theory of plates and shells.Since profound knowledge of mathematics and mechanics is involved, it is hard for pressure vessel designers to study and under- stand these contents intensively.