The O-ring flanged connection system is widely used in rocket motor due to convenience of transportation,installation,examination,repair and components replacement or the need of production techniques.

Flange ring parts is widely used in aviation,spaceflight,automotive area,the ratio of radial dimension(the difference between outside diameter and inner diameter difference) to axial dimension is big,it is easy to form a pit on axial end by the method of radial rolling.

Solution Program of the Leakage of the Big-Sized Flanged Heat Exchangers Based on Structure Design;

Cause Analysis of the Weld Flaw Between the Flanges and Internal Sleeves of the High Pressure Heat Exchangers and Countermeasures;

Cause and measures to body-flange leakage of waste heat boiler;

The split die forging of parts with double round flanges;

The Finite Element Analysis of the GJF High Pressure Insulationg Flanges;