Gt3.5 angle round head is T-304 stainless steel, TIG welded, with limited service life. Its structural performance must be evaluated according to the different environment. The engine exhaust muffler works in harsh environments such as high temperature, gas flow impact and vibration. In addition to good noise elimination and aerodynamic performance, it shall also meet the requirements of high temperature resistance, corrosion resistance, vibration resistance, firmness and durability, safe and reliable operation and long service life; Small volume, light weight, simple structure, easy processing and low cost.