The new design method of shells under external pressure in ASME Ⅷ-2(2007) is briefly analyzed and discussed from different aspects,such as applicable shell scope,loading and loading combinations,allowable compressive stresses and design factors,material properties,and design of stiffening ring.

Discussion on the Increased Range of Allowable Stress in the Design Code for Industrial Metallic Piping;

The article theoretically calculated and analysed the assembly Stress of the pontes to proofread the allowable stress of the plate and rivets.

This paper describes the selection of allowable stress about Aluminum material 1050A and 5083 which used in stress analysis intensity calculation of Aluminum railway tank.

This paper analyzes the admissible stresses used to calculate the diamter of axles accord-ing to torsional stress and resultant stress,and some suggestions are given.

At present,there is no special standard for selection of permissible stresses for heavy duty freight cars in our country.

In this paper,design method of permissible stress of combined spring is proposed according to the structural features of combined spring and the inversely proportional relation between diameter and permissible stress of bar.