Based on ANSYS software,this article analyses and computes the seal shell of petroleum casing hydrostatic test unit by finite element method,finds out the dangerous region and the Von Mises Stess 374Mpa from the displacement and stress cloud images,which provides the representative theoretic guidance for seal shell design.

The virtual inspector of this system strengthen the authenticity,and the design of the dangerous region make the system perfect.

Division of flood damage dangerous zone in Jilin province;

Classification of hazardous area and electric equipment used in the area;

The correct prediction of the hazardous area in toxic gas leaking accident can provide a good basis to establish a reasonable and effective emergency response program and to implement an effective emergency site control and handling activities.

This paper analyzes the fire risk of Airbus painting workshop from two aspects of causes of fire and liquefied gases and zones the fire risk areas.

According to the characteristics of gasoline service station,which has danger zone the division of explosion danger zone in automobile gasoline service station is introduced in detail.